/* * Cppcheck - A tool for static C/C++ code analysis * Copyright (C) 2007-2022 Cppcheck team. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #include "check.h" #include "checkclass.h" #include "errortypes.h" #include "library.h" #include "settings.h" #include "testsuite.h" #include "tokenize.h" #include #include #include #include #include class TestClass : public TestFixture { public: TestClass() : TestFixture("TestClass") {} private: Settings settings0; Settings settings1; void run() override { settings0.severity.enable(Severity::style); settings1.severity.enable(Severity::warning); // Load std.cfg configuration { const char xmldata[] = "\n" "\n" " \n" " malloc\n" " free\n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" ""; tinyxml2::XMLDocument doc; doc.Parse(xmldata, sizeof(xmldata)); settings0.library.load(doc); settings1.library.load(doc); } TEST_CASE(virtualDestructor1); // Base class not found => no error TEST_CASE(virtualDestructor2); // Base class doesn't have a destructor TEST_CASE(virtualDestructor3); // Base class has a destructor, but it's not virtual TEST_CASE(virtualDestructor4); // Derived class doesn't have a destructor => no error TEST_CASE(virtualDestructor5); // Derived class has empty destructor => no error TEST_CASE(virtualDestructor6); // only report error if base class pointer that points at derived class is deleted TEST_CASE(virtualDestructorProtected); TEST_CASE(virtualDestructorInherited); TEST_CASE(virtualDestructorTemplate); TEST_CASE(virtualDestructorInconclusive); // ticket # 5807 TEST_CASE(copyConstructor1); TEST_CASE(copyConstructor2); // ticket #4458 TEST_CASE(copyConstructor3); // defaulted/deleted TEST_CASE(copyConstructor4); // base class with private constructor TEST_CASE(copyConstructor5); // multiple inheritance TEST_CASE(copyConstructor6); // array of pointers TEST_CASE(noOperatorEq); // class with memory management should have operator eq TEST_CASE(noDestructor); // class with memory management should have destructor TEST_CASE(operatorEqRetRefThis1); TEST_CASE(operatorEqRetRefThis2); // ticket #1323 TEST_CASE(operatorEqRetRefThis3); // ticket #1405 TEST_CASE(operatorEqRetRefThis4); // ticket #1451 TEST_CASE(operatorEqRetRefThis5); // ticket #1550 TEST_CASE(operatorEqRetRefThis6); // ticket #2479 TEST_CASE(operatorEqRetRefThis7); // ticket #5782 endless recursion TEST_CASE(operatorEqToSelf1); // single class TEST_CASE(operatorEqToSelf2); // nested class TEST_CASE(operatorEqToSelf3); // multiple inheritance TEST_CASE(operatorEqToSelf4); // nested class with multiple inheritance TEST_CASE(operatorEqToSelf5); // ticket # 1233 TEST_CASE(operatorEqToSelf6); // ticket # 1550 TEST_CASE(operatorEqToSelf7); TEST_CASE(operatorEqToSelf8); // ticket #2179 TEST_CASE(operatorEqToSelf9); // ticket #2592 TEST_CASE(memsetOnStruct); TEST_CASE(memsetVector); TEST_CASE(memsetOnClass); TEST_CASE(memsetOnInvalid); // Ticket #5425: Crash upon invalid TEST_CASE(memsetOnStdPodType); // Ticket #5901 - std::uint8_t TEST_CASE(memsetOnFloat); // Ticket #5421 TEST_CASE(memsetOnUnknown); // Ticket #7183 TEST_CASE(mallocOnClass); TEST_CASE(this_subtraction); // warn about "this-x" // can member function be made const TEST_CASE(const1); TEST_CASE(const2); TEST_CASE(const3); TEST_CASE(const4); TEST_CASE(const5); // ticket #1482 TEST_CASE(const6); // ticket #1491 TEST_CASE(const7); TEST_CASE(const8); // ticket #1517 TEST_CASE(const9); // ticket #1515 TEST_CASE(const10); // ticket #1522 TEST_CASE(const11); // ticket #1529 TEST_CASE(const12); // ticket #1552 TEST_CASE(const13); // ticket #1519 TEST_CASE(const14); TEST_CASE(const15); TEST_CASE(const16); // ticket #1551 TEST_CASE(const17); // ticket #1552 TEST_CASE(const18); TEST_CASE(const19); // ticket #1612 TEST_CASE(const20); // ticket #1602 TEST_CASE(const21); // ticket #1683 TEST_CASE(const22); TEST_CASE(const23); // ticket #1699 TEST_CASE(const24); // ticket #1708 TEST_CASE(const25); // ticket #1724 TEST_CASE(const26); // ticket #1847 TEST_CASE(const27); // ticket #1882 TEST_CASE(const28); // ticket #1883 TEST_CASE(const29); // ticket #1922 TEST_CASE(const30); TEST_CASE(const31); TEST_CASE(const32); // ticket #1905 - member array is assigned TEST_CASE(const33); TEST_CASE(const34); // ticket #1964 TEST_CASE(const35); // ticket #2001 TEST_CASE(const36); // ticket #2003 TEST_CASE(const37); // ticket #2081 and #2085 TEST_CASE(const38); // ticket #2135 TEST_CASE(const39); TEST_CASE(const40); // ticket #2228 TEST_CASE(const41); // ticket #2255 TEST_CASE(const42); // ticket #2282 TEST_CASE(const43); // ticket #2377 TEST_CASE(const44); // ticket #2595 TEST_CASE(const45); // ticket #2664 TEST_CASE(const46); // ticket #2636 TEST_CASE(const47); // ticket #2670 TEST_CASE(const48); // ticket #2672 TEST_CASE(const49); // ticket #2795 TEST_CASE(const50); // ticket #2943 TEST_CASE(const51); // ticket #3040 TEST_CASE(const52); // ticket #3048 TEST_CASE(const53); // ticket #3049 TEST_CASE(const54); // ticket #3052 TEST_CASE(const55); TEST_CASE(const56); // ticket #3149 TEST_CASE(const57); // tickets #2669 and #2477 TEST_CASE(const58); // ticket #2698 TEST_CASE(const59); // ticket #4646 TEST_CASE(const60); // ticket #3322 TEST_CASE(const61); // ticket #5606 TEST_CASE(const62); // ticket #5701 TEST_CASE(const63); // ticket #5983 TEST_CASE(const64); // ticket #6268 TEST_CASE(const65); // ticket #8693 TEST_CASE(const66); // ticket #7714 TEST_CASE(const67); // ticket #9193 TEST_CASE(const68); // ticket #6471 TEST_CASE(const69); // ticket #9806 TEST_CASE(const70); // variadic template can receive more arguments than in its definition TEST_CASE(const71); // ticket #10146 TEST_CASE(const72); // ticket #10520 TEST_CASE(const73); // ticket #10735 TEST_CASE(const74); // ticket #10671 TEST_CASE(const_handleDefaultParameters); TEST_CASE(const_passThisToMemberOfOtherClass); TEST_CASE(assigningPointerToPointerIsNotAConstOperation); TEST_CASE(assigningArrayElementIsNotAConstOperation); TEST_CASE(constoperator1); // operator< can often be const TEST_CASE(constoperator2); // operator<< TEST_CASE(constoperator3); TEST_CASE(constoperator4); TEST_CASE(constoperator5); // ticket #3252 TEST_CASE(constoperator6); // ticket #8669 TEST_CASE(constincdec); // increment/decrement => non-const TEST_CASE(constassign1); TEST_CASE(constassign2); TEST_CASE(constincdecarray); // increment/decrement array element => non-const TEST_CASE(constassignarray); TEST_CASE(constReturnReference); TEST_CASE(constDelete); // delete member variable => not const TEST_CASE(constLPVOID); // a function that returns LPVOID can't be const TEST_CASE(constFunc); // a function that calls const functions can be const TEST_CASE(constVirtualFunc); TEST_CASE(constIfCfg); // ticket #1881 - fp when there are #if TEST_CASE(constFriend); // ticket #1921 - fp for friend function TEST_CASE(constUnion); // ticket #2111 - fp when there is a union TEST_CASE(constArrayOperator); // #4406 TEST_CASE(constRangeBasedFor); // #5514 TEST_CASE(const_shared_ptr); TEST_CASE(constPtrToConstPtr); TEST_CASE(constTrailingReturnType); TEST_CASE(staticArrayPtrOverload); TEST_CASE(initializerListOrder); TEST_CASE(initializerListUsage); TEST_CASE(selfInitialization); TEST_CASE(virtualFunctionCallInConstructor); TEST_CASE(pureVirtualFunctionCall); TEST_CASE(pureVirtualFunctionCallOtherClass); TEST_CASE(pureVirtualFunctionCallWithBody); TEST_CASE(pureVirtualFunctionCallPrevented); TEST_CASE(duplInheritedMembers); TEST_CASE(explicitConstructors); TEST_CASE(copyCtorAndEqOperator); TEST_CASE(override1); TEST_CASE(overrideCVRefQualifiers); TEST_CASE(thisUseAfterFree); TEST_CASE(unsafeClassRefMember); TEST_CASE(ctuOneDefinitionRule); TEST_CASE(testGetFileInfo); } #define checkCopyCtorAndEqOperator(code) checkCopyCtorAndEqOperator_(code, __FILE__, __LINE__) void checkCopyCtorAndEqOperator_(const char code[], const char* file, int line) { // Clear the error log errout.str(""); Settings settings; settings.severity.enable(Severity::warning); // Tokenize.. Tokenizer tokenizer(&settings, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); // Check.. CheckClass checkClass(&tokenizer, &settings, this); (checkClass.checkCopyCtorAndEqOperator)(); } void copyCtorAndEqOperator() { checkCopyCtorAndEqOperator("class A\n" "{\n" " A(const A& other) { }\n" " A& operator=(const A& other) { return *this; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkCopyCtorAndEqOperator("class A\n" "{\n" "};"); ASSERT_EQUALS("", errout.str()); checkCopyCtorAndEqOperator("class A\n" "{\n" " A(const A& other) { }\n" "};"); ASSERT_EQUALS("", errout.str()); checkCopyCtorAndEqOperator("class A\n" "{\n" " A& operator=(const A& other) { return *this; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkCopyCtorAndEqOperator("class A\n" "{\n" " A(const A& other) { }\n" " int x;\n" "};"); TODO_ASSERT_EQUALS("[test.cpp:1]: (warning) The class 'A' has 'copy constructor' but lack of 'operator='.\n", "", errout.str()); // TODO the error message should be clarified. It should say something like 'copy constructor is empty and will not assign i and therefore the behaviour is different to the default assignment operator' checkCopyCtorAndEqOperator("class A\n" "{\n" " A& operator=(const A& other) { return *this; }\n" " int x;\n" "};"); TODO_ASSERT_EQUALS("[test.cpp:1]: (warning) The class 'A' has 'operator=' but lack of 'copy constructor'.\n", "", errout.str()); // TODO the error message should be clarified. It should say something like 'assignment operator does not assign i and therefore the behaviour is different to the default copy constructor' checkCopyCtorAndEqOperator("class A\n" "{\n" " A& operator=(const int &x) { this->x = x; return *this; }\n" " int x;\n" "};"); ASSERT_EQUALS("", errout.str()); checkCopyCtorAndEqOperator("class A {\n" "public:\n" " A() : x(0) { }\n" " A(const A & a) { x = a.x; }\n" " A & operator = (const A & a) {\n" " x = a.x;\n" " return *this;\n" " }\n" "private:\n" " int x;\n" "};\n" "class B : public A {\n" "public:\n" " B() { }\n" " B(const B & b) :A(b) { }\n" "private:\n" " static int i;\n" "};"); ASSERT_EQUALS("", errout.str()); // #7987 - Don't show warning when there is a move constructor checkCopyCtorAndEqOperator("struct S {\n" " std::string test;\n" " S(S&& s) : test(std::move(s.test)) { }\n" " S& operator = (S &&s) {\n" " test = std::move(s.test);\n" " return *this;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); // #8337 - False positive in copy constructor detection checkCopyCtorAndEqOperator("struct StaticListNode {\n" " StaticListNode(StaticListNode*& prev) : m_next(0) {}\n" " StaticListNode* m_next;\n" "};"); ASSERT_EQUALS("", errout.str()); } #define checkExplicitConstructors(code) checkExplicitConstructors_(code, __FILE__, __LINE__) void checkExplicitConstructors_(const char code[], const char* file, int line) { // Clear the error log errout.str(""); // Tokenize.. Tokenizer tokenizer(&settings0, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); // Check.. CheckClass checkClass(&tokenizer, &settings0, this); (checkClass.checkExplicitConstructors)(); } void explicitConstructors() { checkExplicitConstructors("class Class {\n" " Class() = delete;\n" " Class(const Class& other) { }\n" " Class(Class&& other) { }\n" " explicit Class(int i) { }\n" " explicit Class(const std::string&) { }\n" " Class(int a, int b) { }\n" "};"); ASSERT_EQUALS("", errout.str()); checkExplicitConstructors("class Class {\n" " Class() = delete;\n" " explicit Class(const Class& other) { }\n" " explicit Class(Class&& other) { }\n" " virtual int i() = 0;\n" "};"); ASSERT_EQUALS("", errout.str()); checkExplicitConstructors("class Class {\n" " Class() = delete;\n" " Class(const Class& other) = delete;\n" " Class(Class&& other) = delete;\n" " virtual int i() = 0;\n" "};"); ASSERT_EQUALS("", errout.str()); checkExplicitConstructors("class Class {\n" " Class(int i) { }\n" "};"); ASSERT_EQUALS("[test.cpp:2]: (style) Class 'Class' has a constructor with 1 argument that is not explicit.\n", errout.str()); checkExplicitConstructors("class Class {\n" " Class(const Class& other) { }\n" " virtual int i() = 0;\n" "};"); ASSERT_EQUALS("", errout.str()); checkExplicitConstructors("class Class {\n" " Class(Class&& other) { }\n" " virtual int i() = 0;\n" "};"); ASSERT_EQUALS("", errout.str()); // #6585 checkExplicitConstructors("class Class {\n" " private: Class(const Class&);\n" " virtual int i() = 0;\n" "};"); ASSERT_EQUALS("", errout.str()); checkExplicitConstructors("class Class {\n" " public: Class(const Class&);\n" " virtual int i() = 0;\n" "};"); ASSERT_EQUALS("", errout.str()); // #7465: Error properly reported in templates checkExplicitConstructors("template struct Test {\n" " Test(int) : fData(0) {}\n" " T fData;\n" "};\n" "int main() {\n" " Test test;\n" " return 0;\n" "}"); ASSERT_EQUALS("[test.cpp:2]: (style) Struct 'Test < int >' has a constructor with 1 argument that is not explicit.\n", errout.str()); // #7465: No error for copy or move constructors checkExplicitConstructors("template struct Test {\n" " Test() : fData(0) {}\n" " Test (const Test& aOther) : fData(aOther.fData) {}\n" " Test (Test&& aOther) : fData(std::move(aOther.fData)) {}\n" " T fData;\n" "};\n" "int main() {\n" " Test test;\n" " return 0;\n" "}"); ASSERT_EQUALS("", errout.str()); // #8600 checkExplicitConstructors("struct A { struct B; };\n" "struct A::B {\n" " B() = default;\n" " B(const B&) {}\n" "};"); ASSERT_EQUALS("", errout.str()); checkExplicitConstructors("struct A{" " A(int, int y=2) {}" "};"); ASSERT_EQUALS("[test.cpp:1]: (style) Struct 'A' has a constructor with 1 argument that is not explicit.\n", errout.str()); checkExplicitConstructors("struct Foo {\n" // #10515 " template \n" " explicit constexpr Foo(T) {}\n" "};\n" "struct Bar {\n" " template \n" " constexpr explicit Bar(T) {}\n" "};\n" "struct Baz {\n" " explicit constexpr Baz(int) {}\n" "};\n"); ASSERT_EQUALS("", errout.str()); } #define checkDuplInheritedMembers(code) checkDuplInheritedMembers_(code, __FILE__, __LINE__) void checkDuplInheritedMembers_(const char code[], const char* file, int line) { // Clear the error log errout.str(""); // Tokenize.. Tokenizer tokenizer(&settings1, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); // Check.. CheckClass checkClass(&tokenizer, &settings1, this); (checkClass.checkDuplInheritedMembers)(); } void duplInheritedMembers() { checkDuplInheritedMembers("class Base {\n" " int x;\n" "};\n" "struct Derived : Base {\n" " int x;\n" "};"); ASSERT_EQUALS("", errout.str()); checkDuplInheritedMembers("class Base {\n" " protected:\n" " int x;\n" "};\n" "struct Derived : Base {\n" " int x;\n" "};"); ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:6]: (warning) The struct 'Derived' defines member variable with name 'x' also defined in its parent class 'Base'.\n", errout.str()); checkDuplInheritedMembers("class Base {\n" " protected:\n" " int x;\n" "};\n" "struct Derived : public Base {\n" " int x;\n" "};"); ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:6]: (warning) The struct 'Derived' defines member variable with name 'x' also defined in its parent class 'Base'.\n", errout.str()); checkDuplInheritedMembers("class Base0 {\n" " int x;\n" "};\n" "class Base1 {\n" " int x;\n" "};\n" "struct Derived : Base0, Base1 {\n" " int x;\n" "};"); ASSERT_EQUALS("", errout.str()); checkDuplInheritedMembers("class Base0 {\n" " protected:\n" " int x;\n" "};\n" "class Base1 {\n" " int x;\n" "};\n" "struct Derived : Base0, Base1 {\n" " int x;\n" "};"); ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:9]: (warning) The struct 'Derived' defines member variable with name 'x' also defined in its parent class 'Base0'.\n", errout.str()); checkDuplInheritedMembers("class Base0 {\n" " protected:\n" " int x;\n" "};\n" "class Base1 {\n" " public:\n" " int x;\n" "};\n" "struct Derived : Base0, Base1 {\n" " int x;\n" "};"); ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:10]: (warning) The struct 'Derived' defines member variable with name 'x' also defined in its parent class 'Base0'.\n" "[test.cpp:7] -> [test.cpp:10]: (warning) The struct 'Derived' defines member variable with name 'x' also defined in its parent class 'Base1'.\n", errout.str()); checkDuplInheritedMembers("class Base {\n" " int x;\n" "};\n" "struct Derived : Base {\n" " int y;\n" "};"); ASSERT_EQUALS("", errout.str()); checkDuplInheritedMembers("class A {\n" " int x;\n" "};\n" "struct B {\n" " int x;\n" "};"); ASSERT_EQUALS("", errout.str()); // Unknown 'Base' class checkDuplInheritedMembers("class Derived : public UnknownBase {\n" " int x;\n" "};"); ASSERT_EQUALS("", errout.str()); checkDuplInheritedMembers("class Base {\n" " int x;\n" "};\n" "class Derived : public Base {\n" "};"); ASSERT_EQUALS("", errout.str()); // #6692 checkDuplInheritedMembers("namespace test1 {\n" " struct SWibble{};\n" " typedef SWibble wibble;\n" "}\n" "namespace test2 {\n" " struct SWibble : public test1::wibble {\n" " int Value;\n" " };\n" "}"); ASSERT_EQUALS("", errout.str()); // #9957 checkDuplInheritedMembers("class Base {\n" " public:\n" " int i;\n" "};\n" "class Derived1: public Base {\n" " public:\n" " int j;\n" "};\n" "class Derived2 : public Derived1 {\n" " int i;\n" "};"); ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:10]: (warning) The class 'Derived2' defines member variable with name 'i' also defined in its parent class 'Base'.\n", errout.str()); // don't crash on recursive template checkDuplInheritedMembers("template\n" "struct BitInt : public BitInt { };"); ASSERT_EQUALS("", errout.str()); // don't crash on recursive template checkDuplInheritedMembers("namespace _impl {\n" " template \n" " struct fn_traits;\n" "}\n" "template \n" "struct function_traits\n" " : public _impl::fn_traits> {};\n" "namespace _impl {\n" " template \n" " struct fn_traits\n" " : public fn_traits {};\n" "}"); ASSERT_EQUALS("", errout.str()); } #define checkCopyConstructor(code) checkCopyConstructor_(code, __FILE__, __LINE__) void checkCopyConstructor_(const char code[], const char* file, int line) { // Clear the error log errout.str(""); // Tokenize.. Tokenizer tokenizer(&settings0, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); // Check.. CheckClass checkClass(&tokenizer, &settings0, this); checkClass.copyconstructors(); } void copyConstructor1() { checkCopyConstructor("class F\n" "{\n" " public:\n" " char *c,*p,*d;\n" " F(const F &f) : p(f.p), c(f.c)\n" " {\n" " p=(char *)malloc(strlen(f.p)+1);\n" " strcpy(p,f.p);\n" " }\n" " F(char *str)\n" " {\n" " p=(char *)malloc(strlen(str)+1);\n" " strcpy(p,str);\n" " }\n" " F&operator=(const F&);\n" " ~F();\n" "};"); TODO_ASSERT_EQUALS("[test.cpp:5]: (warning) Value of pointer 'p', which points to allocated memory, is copied in copy constructor instead of allocating new memory.\n", "", errout.str()); checkCopyConstructor("class F {\n" " char *p;\n" " F(const F &f) {\n" " p = f.p;\n" " }\n" " F(char *str) {\n" " p = malloc(strlen(str)+1);\n" " }\n" " ~F();\n" " F& operator=(const F&f);\n" "};"); TODO_ASSERT_EQUALS("[test.cpp:4]: (warning) Value of pointer 'p', which points to allocated memory, is copied in copy constructor instead of allocating new memory.\n" "[test.cpp:3] -> [test.cpp:7]: (warning) Copy constructor does not allocate memory for member 'p' although memory has been allocated in other constructors.\n", "[test.cpp:4]: (warning) Value of pointer 'p', which points to allocated memory, is copied in copy constructor instead of allocating new memory.\n" , errout.str()); checkCopyConstructor("class F\n" "{\n" " public:\n" " char *c,*p,*d;\n" " F(const F &f) :p(f.p)\n" " {\n" " }\n" " F(char *str)\n" " {\n" " p=(char *)malloc(strlen(str)+1);\n" " strcpy(p,str);\n" " }\n" " ~F();\n" " F& operator=(const F&f);\n" "};"); TODO_ASSERT_EQUALS("[test.cpp:5]: (warning) Value of pointer 'p', which points to allocated memory, is copied in copy constructor instead of allocating new memory.\n" "[test.cpp:5] -> [test.cpp:10]: (warning) Copy constructor does not allocate memory for member 'p' although memory has been allocated in other constructors.\n", "" , errout.str()); checkCopyConstructor("class kalci\n" "{\n" " public:\n" " char *c,*p,*d;\n" " kalci()\n" " {\n" " p=(char *)malloc(100);\n" " strcpy(p,\"hello\");\n" " c=(char *)malloc(100);\n" " strcpy(p,\"hello\");\n" " d=(char *)malloc(100);\n" " strcpy(p,\"hello\");\n" " }\n" " kalci(const kalci &f)\n" " {\n" " p=(char *)malloc(strlen(str)+1);\n" " strcpy(p,f.p);\n" " c=(char *)malloc(strlen(str)+1);\n" " strcpy(p,f.p);\n" " d=(char *)malloc(strlen(str)+1);\n" " strcpy(p,f.p);\n" " }\n" " ~kalci();\n" " kalci& operator=(const kalci&kalci);\n" "};"); ASSERT_EQUALS("", errout.str()); checkCopyConstructor("class F\n" "{\n" " public:\n" " char *c,*p,*d;\n" " F(char *str,char *st,char *string)\n" " {\n" " p=(char *)malloc(100);\n" " strcpy(p,str);\n" " c=(char *)malloc(100);\n" " strcpy(p,st);\n" " d=(char *)malloc(100);\n" " strcpy(p,string);\n" " }\n" " F(const F &f)\n" " {\n" " p=(char *)malloc(strlen(str)+1);\n" " strcpy(p,f.p);\n" " c=(char *)malloc(strlen(str)+1);\n" " strcpy(p,f.p);\n" " }\n" " ~F();\n" " F& operator=(const F&f);\n" "};"); TODO_ASSERT_EQUALS("[test.cpp:14] -> [test.cpp:11]: (warning) Copy constructor does not allocate memory for member 'd' although memory has been allocated in other constructors.\n", "", errout.str()); checkCopyConstructor("class F {\n" " char *c;\n" " F(char *str,char *st,char *string) {\n" " p=(char *)malloc(100);\n" " }\n" " F(const F &f)\n" " : p(malloc(size))\n" " {\n" " }\n" " ~F();\n" " F& operator=(const F&f);\n" "};"); ASSERT_EQUALS("", errout.str()); checkCopyConstructor("class F {\n" " char *c;\n" " F(char *str,char *st,char *string)\n" " : p(malloc(size))\n" " {\n" " }\n" " F(const F &f)\n" " {\n" " }\n" " ~F();\n" " F& operator=(const F&f);\n" "};"); TODO_ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:4]: (warning) Copy constructor does not allocate memory for member 'd' although memory has been allocated in other constructors.\n", "", errout.str()); checkCopyConstructor("class F\n" "{\n" " public:\n" " char *c,*p,*d;\n" " F()\n" " {\n" " p=(char *)malloc(100);\n" " c=(char *)malloc(100);\n" " d=(char*)malloc(100);\n" " }\n" " ~F();\n" " F& operator=(const F&f);\n" "};"); TODO_ASSERT_EQUALS("[test.cpp:8]: (warning) Class 'F' does not have a copy constructor which is recommended since it has dynamic memory/resource allocation(s).\n", "", errout.str()); checkCopyConstructor("class F\n" "{\n" " public:\n" " char *c;\n" " const char *p,*d;\n" " F(char *str,char *st,char *string)\n" " {\n" " p=str;\n" " d=st;\n" " c=(char *)malloc(strlen(string)+1);\n" " strcpy(d,string);\n" " }\n" " F(const F &f)\n" " {\n" " p=f.p;\n" " d=f.d;\n" " c=(char *)malloc(strlen(str)+1);\n" " strcpy(d,f.p);\n" " }\n" " ~F();\n" " F& operator=(const F&f);\n" "};"); ASSERT_EQUALS("", errout.str()); checkCopyConstructor("class F : E\n" "{\n" " char *p;\n" " F() {\n" " p = malloc(100);\n" " }\n" " ~F();\n" " F& operator=(const F&f);\n" "};"); ASSERT_EQUALS("", errout.str()); checkCopyConstructor("class E { E(E&); };\n" // non-copyable "class F : E\n" "{\n" " char *p;\n" " F() {\n" " p = malloc(100);\n" " }\n" " ~F();\n" " F& operator=(const F&f);\n" "};"); ASSERT_EQUALS("", errout.str()); checkCopyConstructor("class E {};\n" "class F : E {\n" " char *p;\n" " F() {\n" " p = malloc(100);\n" " }\n" " ~F();\n" " F& operator=(const F&f);\n" "};"); ASSERT_EQUALS("[test.cpp:5]: (warning) Class 'F' does not have a copy constructor which is recommended since it has dynamic memory/resource allocation(s).\n", errout.str()); checkCopyConstructor("class F {\n" " char *p;\n" " F() {\n" " p = malloc(100);\n" " }\n" " F(F& f);\n" " ~F();\n" " F& operator=(const F&f);\n" "};"); ASSERT_EQUALS("", errout.str()); checkCopyConstructor("class F {\n" " char *p;\n" " F() : p(malloc(100)) {}\n" " ~F();\n" " F& operator=(const F&f);\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (warning) Class 'F' does not have a copy constructor which is recommended since it has dynamic memory/resource allocation(s).\n", errout.str()); // #7198 checkCopyConstructor("struct F {\n" " static char* c;\n" " F() {\n" " p = malloc(100);\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void copyConstructor2() { // ticket #4458 checkCopyConstructor("template \n" "class Vector\n" "{\n" "public:\n" " Vector() {\n" " _M_finish = new _Tp[ 42 ];\n" " }\n" " Vector( const Vector<_Tp>& v ) {\n" " }\n" " ~Vector();\n" " Vector& operator=(const Vector&v);\n" " _Tp* _M_finish;\n" "};"); ASSERT_EQUALS("", errout.str()); } void copyConstructor3() { checkCopyConstructor("struct F {\n" " char* c;\n" " F() { c = malloc(100); }\n" " F(const F &f) = delete;\n" " F&operator=(const F &f);\n" " ~F();\n" "};"); ASSERT_EQUALS("", errout.str()); checkCopyConstructor("struct F {\n" " char* c;\n" " F() { c = malloc(100); }\n" " F(const F &f) = default;\n" " F&operator=(const F &f);\n" " ~F();\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (warning) Struct 'F' has dynamic memory/resource allocation(s). The copy constructor is explicitly defaulted but the default copy constructor does not work well. It is recommended to define or delete the copy constructor.\n", errout.str()); } void copyConstructor4() { checkCopyConstructor("class noncopyable {\n" "protected:\n" " noncopyable() {}\n" " ~noncopyable() {}\n" "\n" "private:\n" " noncopyable( const noncopyable& );\n" " const noncopyable& operator=( const noncopyable& );\n" "};\n" "\n" "class Base : private noncopyable {};\n" "\n" "class Foo : public Base {\n" "public:\n" " Foo() : m_ptr(new int) {}\n" " ~Foo() { delete m_ptr; }\n" "private:\n" " int* m_ptr;\n" "};"); ASSERT_EQUALS("", errout.str()); } void copyConstructor5() { checkCopyConstructor("class Copyable {};\n" "\n" "class Foo : public Copyable, public UnknownType {\n" "public:\n" " Foo() : m_ptr(new int) {}\n" " ~Foo() { delete m_ptr; }\n" "private:\n" " int* m_ptr;\n" "};"); ASSERT_EQUALS("", errout.str()); checkCopyConstructor("class Copyable {};\n" "\n" "class Foo : public UnknownType, public Copyable {\n" "public:\n" " Foo() : m_ptr(new int) {}\n" " ~Foo() { delete m_ptr; }\n" "private:\n" " int* m_ptr;\n" "};"); ASSERT_EQUALS("", errout.str()); } void copyConstructor6() { checkCopyConstructor("struct S {\n" " S() {\n" " for (int i = 0; i < 5; i++)\n" " a[i] = new char[3];\n" " }\n" " char* a[5];\n" "};\n"); TODO_ASSERT_EQUALS("[test.cpp:4]: (warning) Struct 'S' does not have a copy constructor which is recommended since it has dynamic memory/resource allocation(s).\n" "[test.cpp:4]: (warning) Struct 'S' does not have a operator= which is recommended since it has dynamic memory/resource allocation(s).\n" "[test.cpp:4]: (warning) Struct 'S' does not have a destructor which is recommended since it has dynamic memory/resource allocation(s).\n", "", errout.str()); } void noOperatorEq() { checkCopyConstructor("struct F {\n" " char* c;\n" " F() { c = malloc(100); }\n" " F(const F &f);\n" " ~F();\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (warning) Struct 'F' does not have a operator= which is recommended since it has dynamic memory/resource allocation(s).\n", errout.str()); // defaulted operator= checkCopyConstructor("struct F {\n" " char* c;\n" " F() { c = malloc(100); }\n" " F(const F &f);\n" " F &operator=(const F &f) = default;\n" " ~F();\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (warning) Struct 'F' has dynamic memory/resource allocation(s). The operator= is explicitly defaulted but the default operator= does not work well. It is recommended to define or delete the operator=.\n", errout.str()); // deleted operator= checkCopyConstructor("struct F {\n" " char* c;\n" " F() { c = malloc(100); }\n" " F(const F &f);\n" " F &operator=(const F &f) = delete;\n" " ~F();\n" "};"); ASSERT_EQUALS("", errout.str()); // base class deletes operator= checkCopyConstructor("struct F : NonCopyable {\n" " char* c;\n" " F() { c = malloc(100); }\n" " F(const F &f);\n" " ~F();\n" "};"); ASSERT_EQUALS("", errout.str()); } void noDestructor() { checkCopyConstructor("struct F {\n" " char* c;\n" " F() { c = malloc(100); }\n" " F(const F &f);\n" " F&operator=(const F&);" "};"); ASSERT_EQUALS("[test.cpp:3]: (warning) Struct 'F' does not have a destructor which is recommended since it has dynamic memory/resource allocation(s).\n", errout.str()); checkCopyConstructor("struct F {\n" " C* c;\n" " F() { c = new C; }\n" " F(const F &f);\n" " F&operator=(const F&);" "};"); ASSERT_EQUALS("", errout.str()); checkCopyConstructor("struct F {\n" " int* i;\n" " F() { i = new int(); }\n" " F(const F &f);\n" " F& operator=(const F&);" "};"); ASSERT_EQUALS("[test.cpp:3]: (warning) Struct 'F' does not have a destructor which is recommended since it has dynamic memory/resource allocation(s).\n", errout.str()); checkCopyConstructor("struct Data { int x; int y; };\n" "struct F {\n" " Data* c;\n" " F() { c = new Data; }\n" " F(const F &f);\n" " F&operator=(const F&);" "};"); ASSERT_EQUALS("[test.cpp:4]: (warning) Struct 'F' does not have a destructor which is recommended since it has dynamic memory/resource allocation(s).\n", errout.str()); // defaulted destructor checkCopyConstructor("struct F {\n" " char* c;\n" " F() { c = malloc(100); }\n" " F(const F &f);\n" " F &operator=(const F &f);\n" " ~F() = default;\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (warning) Struct 'F' has dynamic memory/resource allocation(s). The destructor is explicitly defaulted but the default destructor does not work well. It is recommended to define the destructor.\n", errout.str()); // deleted destructor checkCopyConstructor("struct F {\n" " char* c;\n" " F() { c = malloc(100); }\n" " F(const F &f);\n" " F &operator=(const F &f);\n" " ~F() = delete;\n" "};"); ASSERT_EQUALS("", errout.str()); } // Check that operator Equal returns reference to this #define checkOpertorEqRetRefThis(code) checkOpertorEqRetRefThis_(code, __FILE__, __LINE__) void checkOpertorEqRetRefThis_(const char code[], const char* file, int line) { // Clear the error log errout.str(""); // Tokenize.. Tokenizer tokenizer(&settings0, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); // Check.. CheckClass checkClass(&tokenizer, &settings0, this); checkClass.operatorEqRetRefThis(); } void operatorEqRetRefThis1() { checkOpertorEqRetRefThis( "class A\n" "{\n" "public:\n" " A & operator=(const A &a) { return *this; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqRetRefThis( "class A\n" "{\n" "public:\n" " A & operator=(const A &a) { return a; }\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style) 'operator=' should return reference to 'this' instance.\n", errout.str()); checkOpertorEqRetRefThis( "class A\n" "{\n" "public:\n" " A & operator=(const A &);\n" "};\n" "A & A::operator=(const A &a) { return *this; }"); ASSERT_EQUALS("", errout.str()); checkOpertorEqRetRefThis( "class A\n" "{\n" "public:\n" " A & operator=(const A &a);\n" "};\n" "A & A::operator=(const A &a) { return *this; }"); ASSERT_EQUALS("", errout.str()); checkOpertorEqRetRefThis( "class A\n" "{\n" "public:\n" " A & operator=(const A &);\n" "};\n" "A & A::operator=(const A &a) { return a; }"); ASSERT_EQUALS("[test.cpp:6]: (style) 'operator=' should return reference to 'this' instance.\n", errout.str()); checkOpertorEqRetRefThis( "class A\n" "{\n" "public:\n" " A & operator=(const A &a);\n" "};\n" "A & A::operator=(const A &a) { return a; }"); ASSERT_EQUALS("[test.cpp:6]: (style) 'operator=' should return reference to 'this' instance.\n", errout.str()); checkOpertorEqRetRefThis( "class A\n" "{\n" "public:\n" " class B\n" " {\n" " public:\n" " B & operator=(const B &b) { return *this; }\n" " };\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqRetRefThis( "class A\n" "{\n" "public:\n" " class B\n" " {\n" " public:\n" " B & operator=(const B &b) { return b; }\n" " };\n" "};"); ASSERT_EQUALS("[test.cpp:7]: (style) 'operator=' should return reference to 'this' instance.\n", errout.str()); checkOpertorEqRetRefThis( "class A\n" "{\n" "public:\n" " class B\n" " {\n" " public:\n" " B & operator=(const B &);\n" " };\n" "};\n" "A::B & A::B::operator=(const A::B &b) { return *this; }"); ASSERT_EQUALS("", errout.str()); checkOpertorEqRetRefThis( "class A\n" "{\n" "public:\n" " class B\n" " {\n" " public:\n" " B & operator=(const B &);\n" " };\n" "};\n" "A::B & A::B::operator=(const A::B &b) { return b; }"); ASSERT_EQUALS("[test.cpp:10]: (style) 'operator=' should return reference to 'this' instance.\n", errout.str()); checkOpertorEqRetRefThis( "class A {\n" " class B;\n" "};\n" "class A::B\n" "{\n" " B & operator=(const B & b) { return b; }\n" "};"); ASSERT_EQUALS("[test.cpp:6]: (style) 'operator=' should return reference to 'this' instance.\n", errout.str()); checkOpertorEqRetRefThis( "class A {\n" " class B;\n" "};\n" "class A::B\n" "{\n" " B & operator=(const B &);\n" "};\n" "A::B & A::B::operator=(const A::B & b) { return b; }"); ASSERT_EQUALS("[test.cpp:8]: (style) 'operator=' should return reference to 'this' instance.\n", errout.str()); checkOpertorEqRetRefThis( "class A {\n" " class B;\n" "};\n" "class A::B\n" "{\n" " A::B & operator=(const A::B & b) { return b; }\n" "};"); ASSERT_EQUALS("[test.cpp:6]: (style) 'operator=' should return reference to 'this' instance.\n", errout.str()); checkOpertorEqRetRefThis( "class A {\n" " class B;\n" "};\n" "class A::B\n" "{\n" " A::B & operator=(const A::B &);\n" "};\n" "A::B & A::B::operator=(const A::B & b) { return b; }"); ASSERT_EQUALS("[test.cpp:8]: (style) 'operator=' should return reference to 'this' instance.\n", errout.str()); checkOpertorEqRetRefThis( "namespace A {\n" " class B;\n" "}\n" "class A::B\n" "{\n" " B & operator=(const B & b) { return b; }\n" "};"); ASSERT_EQUALS("[test.cpp:6]: (style) 'operator=' should return reference to 'this' instance.\n", errout.str()); checkOpertorEqRetRefThis( "namespace A {\n" " class B;\n" "}\n" "class A::B\n" "{\n" " B & operator=(const B &);\n" "};\n" "A::B & A::B::operator=(const A::B & b) { return b; }"); ASSERT_EQUALS("[test.cpp:8]: (style) 'operator=' should return reference to 'this' instance.\n", errout.str()); checkOpertorEqRetRefThis( "namespace A {\n" " class B;\n" "}\n" "class A::B\n" "{\n" " A::B & operator=(const A::B & b) { return b; }\n" "};"); ASSERT_EQUALS("[test.cpp:6]: (style) 'operator=' should return reference to 'this' instance.\n", errout.str()); checkOpertorEqRetRefThis( "namespace A {\n" " class B;\n" "}\n" "class A::B\n" "{\n" " A::B & operator=(const A::B &);\n" "};\n" "A::B & A::B::operator=(const A::B & b) { return b; }"); ASSERT_EQUALS("[test.cpp:8]: (style) 'operator=' should return reference to 'this' instance.\n", errout.str()); } void operatorEqRetRefThis2() { // ticket # 1323 checkOpertorEqRetRefThis( "class szp\n" "{\n" " szp &operator =(int *other) {}\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (error) No 'return' statement in non-void function causes undefined behavior.\n", errout.str()); checkOpertorEqRetRefThis( "class szp\n" "{\n" " szp &operator =(int *other);\n" "};\n" "szp &szp::operator =(int *other) {}"); ASSERT_EQUALS("[test.cpp:5]: (error) No 'return' statement in non-void function causes undefined behavior.\n", errout.str()); checkOpertorEqRetRefThis( "namespace NS {\n" " class szp;\n" "}\n" "class NS::szp\n" "{\n" " szp &operator =(int *other) {}\n" "};"); ASSERT_EQUALS("[test.cpp:6]: (error) No 'return' statement in non-void function causes undefined behavior.\n", errout.str()); checkOpertorEqRetRefThis( "namespace NS {\n" " class szp;\n" "}\n" "class NS::szp\n" "{\n" " szp &operator =(int *other);\n" "};\n" "NS::szp &NS::szp::operator =(int *other) {}"); ASSERT_EQUALS("[test.cpp:8]: (error) No 'return' statement in non-void function causes undefined behavior.\n", errout.str()); checkOpertorEqRetRefThis( "namespace NS {\n" " class szp;\n" "}\n" "class NS::szp\n" "{\n" " NS::szp &operator =(int *other) {}\n" "};"); ASSERT_EQUALS("[test.cpp:6]: (error) No 'return' statement in non-void function causes undefined behavior.\n", errout.str()); checkOpertorEqRetRefThis( "namespace NS {\n" " class szp;\n" "}\n" "class NS::szp\n" "{\n" " NS::szp &operator =(int *other);\n" "};\n" "NS::szp &NS::szp::operator =(int *other) {}"); ASSERT_EQUALS("[test.cpp:8]: (error) No 'return' statement in non-void function causes undefined behavior.\n", errout.str()); checkOpertorEqRetRefThis( "class A {\n" " class szp;\n" "};\n" "class A::szp\n" "{\n" " szp &operator =(int *other) {}\n" "};"); ASSERT_EQUALS("[test.cpp:6]: (error) No 'return' statement in non-void function causes undefined behavior.\n", errout.str()); checkOpertorEqRetRefThis( "class A {\n" " class szp;\n" "};\n" "class A::szp\n" "{\n" " szp &operator =(int *other);\n" "};\n" "A::szp &A::szp::operator =(int *other) {}"); ASSERT_EQUALS("[test.cpp:8]: (error) No 'return' statement in non-void function causes undefined behavior.\n", errout.str()); checkOpertorEqRetRefThis( "class A {\n" " class szp;\n" "};\n" "class A::szp\n" "{\n" " A::szp &operator =(int *other) {}\n" "};"); ASSERT_EQUALS("[test.cpp:6]: (error) No 'return' statement in non-void function causes undefined behavior.\n", errout.str()); checkOpertorEqRetRefThis( "class A {\n" " class szp;\n" "};\n" "class A::szp\n" "{\n" " A::szp &operator =(int *other);\n" "};\n" "A::szp &A::szp::operator =(int *other) {}"); ASSERT_EQUALS("[test.cpp:8]: (error) No 'return' statement in non-void function causes undefined behavior.\n", errout.str()); } void operatorEqRetRefThis3() { // ticket # 1405 checkOpertorEqRetRefThis( "class A {\n" "public:\n" " inline A &operator =(int *other) { return (*this); };\n" " inline A &operator =(long *other) { return (*this = 0); };\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqRetRefThis( "class A {\n" "public:\n" " A &operator =(int *other);\n" " A &operator =(long *other);\n" "};\n" "A &A::operator =(int *other) { return (*this); };\n" "A &A::operator =(long *other) { return (*this = 0); };"); ASSERT_EQUALS("", errout.str()); checkOpertorEqRetRefThis( "class A {\n" "public:\n" " inline A &operator =(int *other) { return (*this); };\n" " inline A &operator =(long *other) { return operator = (*(int *)other); };\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqRetRefThis( "class A {\n" "public:\n" " A &operator =(int *other);\n" " A &operator =(long *other);\n" "};\n" "A &A::operator =(int *other) { return (*this); };\n" "A &A::operator =(long *other) { return operator = (*(int *)other); };"); ASSERT_EQUALS("", errout.str()); checkOpertorEqRetRefThis( "class A {\n" "public:\n" " A &operator =(int *other);\n" " A &operator =(long *other);\n" "};\n" "A &A::operator =(int *other) { return (*this); };\n" "A &A::operator =(long *other) { return this->operator = (*(int *)other); };"); ASSERT_EQUALS("", errout.str()); checkOpertorEqRetRefThis( // #9045 "class V {\n" "public:\n" " V& operator=(const V& r) {\n" " if (this == &r) {\n" " return ( *this );\n" " }\n" " return *this;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void operatorEqRetRefThis4() { // ticket # 1451 checkOpertorEqRetRefThis( "P& P::operator = (const P& pc)\n" "{\n" " return (P&)(*this += pc);\n" "}"); ASSERT_EQUALS("", errout.str()); } void operatorEqRetRefThis5() { // ticket # 1550 checkOpertorEqRetRefThis( "class A {\n" "public:\n" " A & operator=(const A &a) { }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (error) No 'return' statement in non-void function causes undefined behavior.\n", errout.str()); checkOpertorEqRetRefThis( "class A {\n" "protected:\n" " A & operator=(const A &a) {}\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style) 'operator=' should return reference to 'this' instance.\n", errout.str()); checkOpertorEqRetRefThis( "class A {\n" "private:\n" " A & operator=(const A &a) {}\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style) 'operator=' should return reference to 'this' instance.\n", errout.str()); checkOpertorEqRetRefThis( "class A {\n" "public:\n" " A & operator=(const A &a) {\n" " rand();\n" " throw std::exception();\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style) 'operator=' should either return reference to 'this' instance or be declared private and left unimplemented.\n", errout.str()); checkOpertorEqRetRefThis( "class A {\n" "public:\n" " A & operator=(const A &a) {\n" " rand();\n" " abort();\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style) 'operator=' should either return reference to 'this' instance or be declared private and left unimplemented.\n", errout.str()); checkOpertorEqRetRefThis( "class A {\n" "public:\n" " A & operator=(const A &a);\n" "};\n" "A & A :: operator=(const A &a) { }"); ASSERT_EQUALS("[test.cpp:5]: (error) No 'return' statement in non-void function causes undefined behavior.\n", errout.str()); } void operatorEqRetRefThis6() { // ticket #2478 (segmentation fault) checkOpertorEqRetRefThis( "class UString {\n" "public:\n" " UString& assign( const char* c_str );\n" " UString& operator=( const UString& s );\n" "};\n" "UString& UString::assign( const char* c_str ) {\n" " std::string tmp( c_str );\n" " return assign( tmp );\n" "}\n" "UString& UString::operator=( const UString& s ) {\n" " return assign( s );\n" "}"); } void operatorEqRetRefThis7() { // ticket #5782 Endless recursion in CheckClass::checkReturnPtrThis() checkOpertorEqRetRefThis( "class basic_fbstring {\n" " basic_fbstring& operator=(int il) {\n" " return assign();\n" " }\n" " basic_fbstring& assign() {\n" " return replace();\n" " }\n" " basic_fbstring& replaceImplDiscr() {\n" " return replace();\n" " }\n" " basic_fbstring& replace() {\n" " return replaceImplDiscr();\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } // Check that operator Equal checks for assignment to self #define checkOpertorEqToSelf(code) checkOpertorEqToSelf_(code, __FILE__, __LINE__) void checkOpertorEqToSelf_(const char code[], const char* file, int line) { // Clear the error log errout.str(""); // Tokenize.. Tokenizer tokenizer(&settings1, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); // Check.. CheckClass checkClass(&tokenizer, &settings1, this); checkClass.operatorEqToSelf(); } void operatorEqToSelf1() { // this test has an assignment test but it is not needed checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " A & operator=(const A &a) { if (&a != this) { } return *this; }\n" "};"); ASSERT_EQUALS("", errout.str()); // this test doesn't have an assignment test but it is not needed checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " A & operator=(const A &a) { return *this; }\n" "};"); ASSERT_EQUALS("", errout.str()); // this test needs an assignment test and has it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a)\n" " {\n" " if (&a != this)\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); // this class needs an assignment test but doesn't have it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a)\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " return *this;\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:5]: (warning) 'operator=' should check for assignment to self to avoid problems with dynamic memory.\n", errout.str()); // this test has an assignment test but doesn't need it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " A & operator=(const A &);\n" "};\n" "A & A::operator=(const A &a) { if (&a != this) { } return *this; }"); ASSERT_EQUALS("", errout.str()); // this test doesn't have an assignment test but doesn't need it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " A & operator=(const A &);\n" "};\n" "A & A::operator=(const A &a) { return *this; }"); ASSERT_EQUALS("", errout.str()); // this test needs an assignment test and has it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " if (&a != this)\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" "}"); ASSERT_EQUALS("", errout.str()); // this test needs an assignment test and has the inverse test checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " if (&a == this)\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" "}"); ASSERT_EQUALS("[test.cpp:7]: (warning) 'operator=' should check for assignment to self to avoid problems with dynamic memory.\n", errout.str()); // this test needs an assignment test and has the inverse test checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " if ((&a == this) == true)\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" "}"); ASSERT_EQUALS("[test.cpp:7]: (warning) 'operator=' should check for assignment to self to avoid problems with dynamic memory.\n", errout.str()); // this test needs an assignment test and has the inverse test checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " if ((&a == this) != false)\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" "}"); ASSERT_EQUALS("[test.cpp:7]: (warning) 'operator=' should check for assignment to self to avoid problems with dynamic memory.\n", errout.str()); // this test needs an assignment test and has the inverse test checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " if (!((&a == this) == false))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" "}"); ASSERT_EQUALS("[test.cpp:7]: (warning) 'operator=' should check for assignment to self to avoid problems with dynamic memory.\n", errout.str()); // this test needs an assignment test and has the inverse test checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " if ((&a != this) == false)\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" "}"); ASSERT_EQUALS("[test.cpp:7]: (warning) 'operator=' should check for assignment to self to avoid problems with dynamic memory.\n", errout.str()); // this test needs an assignment test and has the inverse test checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " if (&a != this)\n" " {\n" " }\n" " else\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" "}"); ASSERT_EQUALS("[test.cpp:7]: (warning) 'operator=' should check for assignment to self to avoid problems with dynamic memory.\n", errout.str()); // this test needs an assignment test and has the inverse test checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " if (&a != this)\n" " free(s);\n" " else\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" "}"); ASSERT_EQUALS("[test.cpp:7]: (warning) 'operator=' should check for assignment to self to avoid problems with dynamic memory.\n", errout.str()); // this test needs an assignment test but doesn’t have it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " free(s);\n" " s = strdup(a.s);\n" " return *this;\n" "}"); ASSERT_EQUALS("[test.cpp:7]: (warning) 'operator=' should check for assignment to self to avoid problems with dynamic memory.\n", errout.str()); // ticket #1224 checkOpertorEqToSelf( "const SubTree &SubTree::operator= (const SubTree &b)\n" "{\n" " CodeTree *oldtree = tree;\n" " tree = new CodeTree(*b.tree);\n" " delete oldtree;\n" " return *this;\n" "}\n" "const SubTree &SubTree::operator= (const CodeTree &b)\n" "{\n" " CodeTree *oldtree = tree;\n" " tree = new CodeTree(b);\n" " delete oldtree;\n" " return *this;\n" "}"); ASSERT_EQUALS("", errout.str()); } void operatorEqToSelf2() { // this test has an assignment test but doesn't need it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " class B\n" " {\n" " public:\n" " B & operator=(const B &b) { if (&b != this) { } return *this; }\n" " };\n" "};"); ASSERT_EQUALS("", errout.str()); // this test doesn't have an assignment test but doesn't need it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " class B\n" " {\n" " public:\n" " B & operator=(const B &b) { return *this; }\n" " };\n" "};"); ASSERT_EQUALS("", errout.str()); // this test needs an assignment test but has it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " class B\n" " {\n" " public:\n" " char *s;\n" " B & operator=(const B &b)\n" " {\n" " if (&b != this)\n" " {\n" " }\n" " return *this;\n" " }\n" " };\n" "};"); ASSERT_EQUALS("", errout.str()); // this test needs an assignment test but doesn't have it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " class B\n" " {\n" " public:\n" " char *s;\n" " B & operator=(const B &b)\n" " {\n" " free(s);\n" " s = strdup(b.s);\n" " return *this;\n" " }\n" " };\n" "};"); ASSERT_EQUALS("[test.cpp:8]: (warning) 'operator=' should check for assignment to self to avoid problems with dynamic memory.\n", errout.str()); // this test has an assignment test but doesn't need it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " class B\n" " {\n" " public:\n" " B & operator=(const B &);\n" " };\n" "};\n" "A::B & A::B::operator=(const A::B &b) { if (&b != this) { } return *this; }"); ASSERT_EQUALS("", errout.str()); // this test doesn't have an assignment test but doesn't need it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " class B\n" " {\n" " public:\n" " B & operator=(const B &);\n" " };\n" "};\n" "A::B & A::B::operator=(const A::B &b) { return *this; }"); ASSERT_EQUALS("", errout.str()); // this test needs an assignment test and has it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " class B\n" " {\n" " public:\n" " char * s;\n" " B & operator=(const B &);\n" " };\n" "};\n" "A::B & A::B::operator=(const A::B &b)\n" "{\n" " if (&b != this)\n" " {\n" " free(s);\n" " s = strdup(b.s);\n" " }\n" " return *this;\n" " }"); ASSERT_EQUALS("", errout.str()); // this test needs an assignment test but doesn't have it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " class B\n" " {\n" " public:\n" " char * s;\n" " B & operator=(const B &);\n" " };\n" "};\n" "A::B & A::B::operator=(const A::B &b)\n" "{\n" " free(s);\n" " s = strdup(b.s);\n" " return *this;\n" " }"); ASSERT_EQUALS("[test.cpp:11]: (warning) 'operator=' should check for assignment to self to avoid problems with dynamic memory.\n", errout.str()); } void operatorEqToSelf3() { // this test has multiple inheritance so there is no trivial way to test for self assignment but doesn't need it checkOpertorEqToSelf( "class A : public B, public C\n" "{\n" "public:\n" " A & operator=(const A &a) { return *this; }\n" "};"); ASSERT_EQUALS("", errout.str()); // this test has multiple inheritance and needs an assignment test but there is no trivial way to test for it checkOpertorEqToSelf( "class A : public B, public C\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a)\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " return *this;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); // this test has multiple inheritance so there is no trivial way to test for self assignment but doesn't need it checkOpertorEqToSelf( "class A : public B, public C\n" "{\n" "public:\n" " A & operator=(const A &);\n" "};\n" "A & A::operator=(const A &a) { return *this; }"); ASSERT_EQUALS("", errout.str()); // this test has multiple inheritance and needs an assignment test but there is no trivial way to test for it checkOpertorEqToSelf( "class A : public B, public C\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " free(s);\n" " s = strdup(a.s);\n" " return *this;\n" "}"); ASSERT_EQUALS("", errout.str()); } void operatorEqToSelf4() { // this test has multiple inheritance so there is no trivial way to test for self assignment but doesn't need it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " class B : public C, public D\n" " {\n" " public:\n" " B & operator=(const B &b) { return *this; }\n" " };\n" "};"); ASSERT_EQUALS("", errout.str()); // this test has multiple inheritance and needs an assignment test but there is no trivial way to test for it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " class B : public C, public D\n" " {\n" " public:\n" " char * s;\n" " B & operator=(const B &b)\n" " {\n" " free(s);\n" " s = strdup(b.s);\n" " return *this;\n" " }\n" " };\n" "};"); ASSERT_EQUALS("", errout.str()); // this test has multiple inheritance so there is no trivial way to test for self assignment but doesn't need it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " class B : public C, public D\n" " {\n" " public:\n" " B & operator=(const B &);\n" " };\n" "};\n" "A::B & A::B::operator=(const A::B &b) { return *this; }"); ASSERT_EQUALS("", errout.str()); // this test has multiple inheritance and needs an assignment test but there is no trivial way to test for it checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " class B : public C, public D\n" " {\n" " public:\n" " char * s;\n" " B & operator=(const B &);\n" " };\n" "};\n" "A::B & A::B::operator=(const A::B &b)\n" "{\n" " free(s);\n" " s = strdup(b.s);\n" " return *this;\n" "}"); ASSERT_EQUALS("", errout.str()); } void operatorEqToSelf5() { // ticket # 1233 checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a)\n" " {\n" " if((&a!=this))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a)\n" " {\n" " if((this!=&a))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a)\n" " {\n" " if(!(&a==this))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a)\n" " {\n" " if(!(this==&a))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a)\n" " {\n" " if(false==(&a==this))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a)\n" " {\n" " if(false==(this==&a))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a)\n" " {\n" " if(true!=(&a==this))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a)\n" " {\n" " if(true!=(this==&a))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " if((&a!=this))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " if((this!=&a))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " if(!(&a==this))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " if(!(this==&a))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " if(false==(&a==this))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " if(false==(this==&a))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " if(true!=(&a==this))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " char *s;\n" " A & operator=(const A &a);\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " if(true!=(this==&a))\n" " {\n" " free(s);\n" " s = strdup(a.s);\n" " }\n" " return *this;\n" "};"); ASSERT_EQUALS("", errout.str()); checkOpertorEqToSelf( "struct A {\n" " char *s;\n" " A& operator=(const B &b);\n" "};\n" "A& A::operator=(const B &b) {\n" " free(s);\n" " s = strdup(a.s);\n" " return *this;\n" "};"); ASSERT_EQUALS("", errout.str()); } void operatorEqToSelf6() { // ticket # 1550 checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " A & operator=(const A &a)\n" " {\n" " delete [] data;\n" " data = new char[strlen(a.data) + 1];\n" " strcpy(data, a.data);\n" " return *this;\n" " }\n" "private:\n" " char * data;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (warning) 'operator=' should check for assignment to self to avoid problems with dynamic memory.\n", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " A & operator=(const A &a);\n" "private:\n" " char * data;\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " delete [] data;\n" " data = new char[strlen(a.data) + 1];\n" " strcpy(data, a.data);\n" " return *this;\n" "};"); ASSERT_EQUALS("[test.cpp:8]: (warning) 'operator=' should check for assignment to self to avoid problems with dynamic memory.\n", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " A & operator=(const A &a)\n" " {\n" " delete data;\n" " data = new char;\n" " *data = *a.data;\n" " return *this;\n" " }\n" "private:\n" " char * data;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (warning) 'operator=' should check for assignment to self to avoid problems with dynamic memory.\n", errout.str()); checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " A & operator=(const A &a);\n" "private:\n" " char * data;\n" "};\n" "A & A::operator=(const A &a)\n" "{\n" " delete data;\n" " data = new char;\n" " *data = *a.data;\n" " return *this;\n" "};"); ASSERT_EQUALS("[test.cpp:8]: (warning) 'operator=' should check for assignment to self to avoid problems with dynamic memory.\n", errout.str()); } void operatorEqToSelf7() { checkOpertorEqToSelf( "class A\n" "{\n" "public:\n" " A & assign(const A & a)\n" " {\n" " return *this;\n" " }\n" " A & operator=(const A &a)\n" " {\n" " return assign(a);\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void operatorEqToSelf8() { checkOpertorEqToSelf( "class FMat\n" "{\n" "public:\n" " FMat& copy(const FMat& rhs);\n" " FMat& operator=(const FMat& in);\n" "};\n" "FMat& FMat::copy(const FMat& rhs)\n" "{\n" " return *this;\n" "}\n" "FMat& FMat::operator=(const FMat& in)\n" "{\n" " return copy(in);\n" "}"); ASSERT_EQUALS("", errout.str()); } void operatorEqToSelf9() { checkOpertorEqToSelf( "class Foo\n" "{\n" "public:\n" " Foo& operator=(Foo* pOther);\n" " Foo& operator=(Foo& other);\n" "};\n" "Foo& Foo::operator=(Foo* pOther)\n" "{\n" " return *this;\n" "}\n" "Foo& Foo::operator=(Foo& other)\n" "{\n" " return Foo::operator=(&other);\n" "}"); ASSERT_EQUALS("", errout.str()); } // Check that base classes have virtual destructors #define checkVirtualDestructor(...) checkVirtualDestructor_(__FILE__, __LINE__, __VA_ARGS__) void checkVirtualDestructor_(const char* file, int line, const char code[], bool inconclusive = false) { // Clear the error log errout.str(""); settings0.certainty.setEnabled(Certainty::inconclusive, inconclusive); settings0.severity.enable(Severity::warning); // Tokenize.. Tokenizer tokenizer(&settings0, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); // Check.. CheckClass checkClass(&tokenizer, &settings0, this); checkClass.virtualDestructor(); } void virtualDestructor1() { // Base class not found checkVirtualDestructor("class Derived : public Base { };\n" "Base *base = new Derived;\n" "delete base;"); ASSERT_EQUALS("", errout.str()); checkVirtualDestructor("class Derived : Base { };\n" "Base *base = new Derived;\n" "delete base;"); ASSERT_EQUALS("", errout.str()); } void virtualDestructor2() { // Base class doesn't have a destructor checkVirtualDestructor("class Base { };\n" "class Derived : public Base { public: ~Derived() { (void)11; } };" "Base *base = new Derived;\n" "delete base;"); ASSERT_EQUALS("[test.cpp:1]: (error) Class 'Base' which is inherited by class 'Derived' does not have a virtual destructor.\n", errout.str()); checkVirtualDestructor("class Base { };\n" "class Derived : protected Base { public: ~Derived() { (void)11; } };" "Base *base = new Derived;\n" "delete base;"); ASSERT_EQUALS("[test.cpp:1]: (error) Class 'Base' which is inherited by class 'Derived' does not have a virtual destructor.\n", errout.str()); checkVirtualDestructor("class Base { };\n" "class Derived : private Base { public: ~Derived() { (void)11; } };" "Base *base = new Derived;\n" "delete base;"); ASSERT_EQUALS("", errout.str()); checkVirtualDestructor("class Base { };\n" "class Derived : Base { public: ~Derived() { (void)11; } };" "Base *base = new Derived;\n" "delete base;"); ASSERT_EQUALS("", errout.str()); } void virtualDestructor3() { // Base class has a destructor, but it's not virtual checkVirtualDestructor("class Base { public: ~Base(); };\n" "class Derived : public Base { public: ~Derived() { (void)11; } };" "Base *base = new Derived;\n" "delete base;"); ASSERT_EQUALS("[test.cpp:1]: (error) Class 'Base' which is inherited by class 'Derived' does not have a virtual destructor.\n", errout.str()); checkVirtualDestructor("class Base { public: ~Base(); };\n" "class Derived : protected Base { public: ~Derived() { (void)11; } };" "Base *base = new Derived;\n" "delete base;"); ASSERT_EQUALS("[test.cpp:1]: (error) Class 'Base' which is inherited by class 'Derived' does not have a virtual destructor.\n", errout.str()); checkVirtualDestructor("class Base { public: ~Base(); };\n" "class Derived : private Fred, public Base { public: ~Derived() { (void)11; } };" "Base *base = new Derived;\n" "delete base;"); ASSERT_EQUALS("[test.cpp:1]: (error) Class 'Base' which is inherited by class 'Derived' does not have a virtual destructor.\n", errout.str()); } void virtualDestructor4() { // Derived class doesn't have a destructor => undefined behaviour according to paragraph 3 in [expr.delete] checkVirtualDestructor("class Base { public: ~Base(); };\n" "class Derived : public Base { };" "Base *base = new Derived;\n" "delete base;"); ASSERT_EQUALS("[test.cpp:1]: (error) Class 'Base' which is inherited by class 'Derived' does not have a virtual destructor.\n", errout.str()); checkVirtualDestructor("class Base { public: ~Base(); };\n" "class Derived : private Fred, public Base { };" "Base *base = new Derived;\n" "delete base;"); ASSERT_EQUALS("[test.cpp:1]: (error) Class 'Base' which is inherited by class 'Derived' does not have a virtual destructor.\n", errout.str()); } void virtualDestructor5() { // Derived class has empty destructor => undefined behaviour according to paragraph 3 in [expr.delete] checkVirtualDestructor("class Base { public: ~Base(); };\n" "class Derived : public Base { public: ~Derived() {} };" "Base *base = new Derived;\n" "delete base;"); ASSERT_EQUALS("[test.cpp:1]: (error) Class 'Base' which is inherited by class 'Derived' does not have a virtual destructor.\n", errout.str()); checkVirtualDestructor("class Base { public: ~Base(); };\n" "class Derived : public Base { public: ~Derived(); }; Derived::~Derived() {}" "Base *base = new Derived;\n" "delete base;"); ASSERT_EQUALS("[test.cpp:1]: (error) Class 'Base' which is inherited by class 'Derived' does not have a virtual destructor.\n", errout.str()); } void virtualDestructor6() { // Only report error if base class pointer is deleted that // points at derived class checkVirtualDestructor("class Base { public: ~Base(); };\n" "class Derived : public Base { public: ~Derived() { (void)11; } };"); ASSERT_EQUALS("", errout.str()); } void virtualDestructorProtected() { // Base class has protected destructor, it makes Base *p = new Derived(); fail // during compilation time, so error is not possible. => no error checkVirtualDestructor("class A\n" "{\n" "protected:\n" " ~A() { }\n" "};\n" "\n" "class B : public A\n" "{\n" "public:\n" " ~B() { int a; }\n" "};"); ASSERT_EQUALS("", errout.str()); } void virtualDestructorInherited() { // class A inherits virtual destructor from class Base -> no error checkVirtualDestructor("class Base\n" "{\n" "public:\n" "virtual ~Base() {}\n" "};\n" "class A : private Base\n" "{\n" "public:\n" " ~A() { }\n" "};\n" "\n" "class B : public A\n" "{\n" "public:\n" " ~B() { int a; }\n" "};"); ASSERT_EQUALS("", errout.str()); // class A inherits virtual destructor from struct Base -> no error // also notice that public is not given, but destructor is public, because // we are using struct instead of class checkVirtualDestructor("struct Base\n" "{\n" "virtual ~Base() {}\n" "};\n" "class A : public Base\n" "{\n" "};\n" "\n" "class B : public A\n" "{\n" "public:\n" " ~B() { int a; }\n" "};"); ASSERT_EQUALS("", errout.str()); // Unknown Base class -> it could have virtual destructor, so ignore checkVirtualDestructor("class A : private Base\n" "{\n" "public:\n" " ~A() { }\n" "};\n" "\n" "class B : public A\n" "{\n" "public:\n" " ~B() { int a; }\n" "};"); ASSERT_EQUALS("", errout.str()); // Virtual destructor is inherited -> no error checkVirtualDestructor("class Base2\n" "{\n" "virtual ~Base2() {}\n" "};\n" "class Base : public Base2\n" "{\n" "};\n" "class A : private Base\n" "{\n" "public:\n" " ~A() { }\n" "};\n" "\n" "class B : public A\n" "{\n" "public:\n" " ~B() { int a; }\n" "};"); ASSERT_EQUALS("", errout.str()); // class A doesn't inherit virtual destructor from class Base -> error checkVirtualDestructor("class Base\n" "{\n" "public:\n" " ~Base() {}\n" "};\n" "class A : private Base\n" "{\n" "public:\n" " ~A() { }\n" "};\n" "\n" "class B : public A\n" "{\n" "public:\n" " ~B() { int a; }\n" "};"); TODO_ASSERT_EQUALS("[test.cpp:7]: (error) Class 'Base' which is inherited by class 'B' does not have a virtual destructor.\n", "", errout.str()); } void virtualDestructorTemplate() { checkVirtualDestructor("template class A\n" "{\n" " public:\n" " virtual ~A(){}\n" "};\n" "template class AA\n" "{\n" " public:\n" " ~AA(){}\n" "};\n" "class B : public A, public AA\n" "{\n" " public:\n" " ~B(){int a;}\n" "};\n" "\n" "AA *p = new B; delete p;"); ASSERT_EQUALS("[test.cpp:9]: (error) Class 'AA < double >' which is inherited by class 'B' does not have a virtual destructor.\n", errout.str()); } void virtualDestructorInconclusive() { checkVirtualDestructor("class Base {\n" "public:\n" " ~Base(){}\n" " virtual void foo(){}\n" "};\n", true); ASSERT_EQUALS("[test.cpp:3]: (warning, inconclusive) Class 'Base' which has virtual members does not have a virtual destructor.\n", errout.str()); checkVirtualDestructor("class Base {\n" "public:\n" " ~Base(){}\n" " virtual void foo(){}\n" "};\n" "class Derived : public Base {\n" "public:\n" " ~Derived() { bar(); }\n" "};\n" "void foo() {\n" " Base * base = new Derived();\n" " delete base;\n" "}\n", true); ASSERT_EQUALS("[test.cpp:3]: (error) Class 'Base' which is inherited by class 'Derived' does not have a virtual destructor.\n", errout.str()); // class Base destructor is not virtual but protected -> no error checkVirtualDestructor("class Base {\n" "public:\n" " virtual void foo(){}\n" "protected:\n" " ~Base(){}\n" "};\n", true); ASSERT_EQUALS("", errout.str()); checkVirtualDestructor("class C {\n" "private:\n" " C();\n" " virtual ~C();\n" "};\n", true); ASSERT_EQUALS("", errout.str()); } #define checkNoMemset(...) checkNoMemset_(__FILE__, __LINE__, __VA_ARGS__) void checkNoMemset_(const char* file, int line, const char code[]) { Settings settings; settings.severity.enable(Severity::warning); settings.severity.enable(Severity::portability); checkNoMemset_(file, line, code, settings); } void checkNoMemset_(const char* file, int line, const char code[], const Settings &settings) { // Clear the error log errout.str(""); // Tokenize.. Tokenizer tokenizer(&settings, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); // Check.. CheckClass checkClass(&tokenizer, &settings, this); checkClass.checkMemset(); } void memsetOnClass() { checkNoMemset("class Fred\n" "{\n" "};\n" "void f()\n" "{\n" " Fred fred;\n" " memset(&fred, 0, sizeof(Fred));\n" "}"); ASSERT_EQUALS("", errout.str()); checkNoMemset("class Fred\n" "{\n" " static std::string b;\n" "};\n" "void f()\n" "{\n" " Fred fred;\n" " memset(&fred, 0, sizeof(Fred));\n" "}"); ASSERT_EQUALS("", errout.str()); checkNoMemset("class Fred\n" "{\n" " std::string * b;\n" "};\n" "void f()\n" "{\n" " Fred fred;\n" " memset(&fred, 0, sizeof(Fred));\n" "}"); ASSERT_EQUALS("", errout.str()); checkNoMemset("class Fred\n" "{\n" " std::string b;\n" "};\n" "void f()\n" "{\n" " Fred fred;\n" " memset(&fred, 0, sizeof(Fred));\n" "}"); ASSERT_EQUALS("[test.cpp:8]: (error) Using 'memset' on class that contains a 'std::string'.\n", errout.str()); checkNoMemset("class Fred\n" "{\n" " mutable std::string b;\n" "};\n" "void f()\n" "{\n" " Fred fred;\n" " memset(&fred, 0, sizeof(Fred));\n" "}"); ASSERT_EQUALS("[test.cpp:8]: (error) Using 'memset' on class that contains a 'std::string'.\n", errout.str()); checkNoMemset("class Fred {\n" " std::string b;\n" " void f();\n" "};\n" "void Fred::f() {\n" " memset(this, 0, sizeof(*this));\n" "}"); ASSERT_EQUALS("[test.cpp:6]: (error) Using 'memset' on class that contains a 'std::string'.\n", errout.str()); checkNoMemset("class Fred\n" "{\n" "};\n" "void f()\n" "{\n" " Fred fred;\n" " memset(&fred, 0, sizeof(fred));\n" "}"); ASSERT_EQUALS("", errout.str()); checkNoMemset("class Fred\n" "{\n" " std::string s;\n" "};\n" "void f()\n" "{\n" " Fred fred;\n" " memset(&fred, 0, sizeof(fred));\n" "}"); ASSERT_EQUALS("[test.cpp:8]: (error) Using 'memset' on class that contains a 'std::string'.\n", errout.str()); checkNoMemset("class Fred\n" "{\n" " std::string s;\n" "};\n" "class Pebbles: public Fred {};\n" "void f()\n" "{\n" " Pebbles pebbles;\n" " memset(&pebbles, 0, sizeof(pebbles));\n" "}"); ASSERT_EQUALS("[test.cpp:9]: (error) Using 'memset' on class that contains a 'std::string'.\n", errout.str()); checkNoMemset("class Fred\n" "{\n" " virtual ~Fred();\n" "};\n" "void f()\n" "{\n" " Fred fred;\n" " memset(&fred, 0, sizeof(fred));\n" "}"); ASSERT_EQUALS("[test.cpp:8]: (error) Using 'memset' on class that contains a virtual function.\n", errout.str()); checkNoMemset("class Fred\n" "{\n" " virtual ~Fred();\n" "};\n" "void f()\n" "{\n" " static Fred fred;\n" " memset(&fred, 0, sizeof(fred));\n" "}"); ASSERT_EQUALS("[test.cpp:8]: (error) Using 'memset' on class that contains a virtual function.\n", errout.str()); checkNoMemset("class Fred\n" "{\n" "};\n" "class Wilma\n" "{\n" " virtual ~Wilma();\n" "};\n" "class Pebbles: public Fred, Wilma {};\n" "void f()\n" "{\n" " Pebbles pebbles;\n" " memset(&pebbles, 0, sizeof(pebbles));\n" "}"); ASSERT_EQUALS("[test.cpp:12]: (error) Using 'memset' on class that contains a virtual function.\n", errout.str()); // Fred not defined in scope checkNoMemset("namespace n1 {\n" " class Fred\n" " {\n" " std::string b;\n" " };\n" "}\n" "void f()\n" "{\n" " Fred fred;\n" " memset(&fred, 0, sizeof(Fred));\n" "}"); ASSERT_EQUALS("", errout.str()); // Fred with namespace qualifier checkNoMemset("namespace n1 {\n" " class Fred\n" " {\n" " std::string b;\n" " };\n" "}\n" "void f()\n" "{\n" " n1::Fred fred;\n" " memset(&fred, 0, sizeof(n1::Fred));\n" "}"); ASSERT_EQUALS("[test.cpp:10]: (error) Using 'memset' on class that contains a 'std::string'.\n", errout.str()); // Fred with namespace qualifier checkNoMemset("namespace n1 {\n" " class Fred\n" " {\n" " std::string b;\n" " };\n" "}\n" "void f()\n" "{\n" " n1::Fred fred;\n" " memset(&fred, 0, sizeof(fred));\n" "}"); ASSERT_EQUALS("[test.cpp:10]: (error) Using 'memset' on class that contains a 'std::string'.\n", errout.str()); checkNoMemset("class A {\n" " virtual ~A() { }\n" " std::string s;\n" "};\n" "int f() {\n" " const int N = 10;\n" " A** arr = new A*[N];\n" " memset(arr, 0, N * sizeof(A*));\n" "}"); ASSERT_EQUALS("", errout.str()); checkNoMemset("class A {\n" // #5116 - nested class data is mixed in the SymbolDatabase " std::string s;\n" " struct B { int x; };\n" "};\n" "void f(A::B *b) {\n" " memset(b,0,4);\n" "}"); ASSERT_EQUALS("", errout.str()); // #4461 Warn about memset/memcpy on class with references as members checkNoMemset("class A {\n" " std::string &s;\n" "};\n" "void f() {\n" " A a;\n" " memset(&a, 0, sizeof(a));\n" "}"); ASSERT_EQUALS("[test.cpp:6]: (error) Using 'memset' on class that contains a reference.\n", errout.str()); checkNoMemset("class A {\n" " const B&b;\n" "};\n" "void f() {\n" " A a;\n" " memset(&a, 0, sizeof(a));\n" "}"); ASSERT_EQUALS("[test.cpp:6]: (error) Using 'memset' on class that contains a reference.\n", errout.str()); // #7456 checkNoMemset("struct A {\n" " A() {}\n" " virtual ~A() {}\n" "};\n" "struct B {\n" " A* arr[4];\n" "};\n" "void func() {\n" " B b[4];\n" " memset(b, 0, sizeof(b));\n" "}"); ASSERT_EQUALS("", errout.str()); } void memsetOnInvalid() { // Ticket #5425 checkNoMemset("union ASFStreamHeader {\n" " struct AVMPACKED {\n" " union {\n" " struct AVMPACKED {\n" " int width;\n" " } vid;\n" " };\n" " } hdr;\n" "};" "void parseHeader() {\n" " ASFStreamHeader strhdr;\n" " memset(&strhdr, 0, sizeof(strhdr));\n" "}"); } void memsetOnStruct() { checkNoMemset("struct A\n" "{\n" "};\n" "void f()\n" "{\n" " A a;\n" " memset(&a, 0, sizeof(A));\n" "}"); ASSERT_EQUALS("", errout.str()); checkNoMemset("struct A\n" "{\n" "};\n" "void f()\n" "{\n" " struct A a;\n" " memset(&a, 0, sizeof(struct A));\n" "}"); ASSERT_EQUALS("", errout.str()); checkNoMemset("struct A\n" "{\n" "};\n" "void f()\n" "{\n" " struct A a;\n" " memset(&a, 0, sizeof(A));\n" "}"); ASSERT_EQUALS("", errout.str()); checkNoMemset("void f()\n" "{\n" " struct sockaddr_in6 fail;\n" " memset(&fail, 0, sizeof(struct sockaddr_in6));\n" "}"); ASSERT_EQUALS("", errout.str()); checkNoMemset("struct A\n" "{\n" " void g( struct sockaddr_in6& a);\n" "private:\n" " std::string b;\n" "};\n" "void f()\n" "{\n" " struct A fail;\n" " memset(&fail, 0, sizeof(struct A));\n" "}"); ASSERT_EQUALS("[test.cpp:10]: (error) Using 'memset' on struct that contains a 'std::string'.\n", errout.str()); checkNoMemset("struct Fred\n" "{\n" " std::string s;\n" "};\n" "void f()\n" "{\n" " Fred fred;\n" " memset(&fred, 0, sizeof(fred));\n" "}"); ASSERT_EQUALS("[test.cpp:8]: (error) Using 'memset' on struct that contains a 'std::string'.\n", errout.str()); checkNoMemset("struct Stringy {\n" " std::string inner;\n" "};\n" "struct Foo {\n" " Stringy s;\n" "};\n" "int main() {\n" " Foo foo;\n" " memset(&foo, 0, sizeof(Foo));\n" "}"); ASSERT_EQUALS("[test.cpp:9]: (error) Using 'memset' on struct that contains a 'std::string'.\n", errout.str()); } void memsetVector() { checkNoMemset("class A\n" "{ std::vector ints; };\n" "\n" "void f()\n" "{\n" " A a;\n" " memset(&a, 0, sizeof(A));\n" "}"); ASSERT_EQUALS("[test.cpp:7]: (error) Using 'memset' on class that contains a 'std::vector'.\n", errout.str()); checkNoMemset("struct A\n" "{ std::vector ints; };\n" "\n" "void f()\n" "{\n" " A a;\n" " memset(&a, 0, sizeof(A));\n" "}"); ASSERT_EQUALS("[test.cpp:7]: (error) Using 'memset' on struct that contains a 'std::vector'.\n", errout.str()); checkNoMemset("struct A\n" "{ std::vector ints; };\n" "\n" "void f()\n" "{\n" " A a;\n" " memset(&a, 0, sizeof(struct A));\n" "}"); ASSERT_EQUALS("[test.cpp:7]: (error) Using 'memset' on struct that contains a 'std::vector'.\n", errout.str()); checkNoMemset("struct A\n" "{ std::vector ints; };\n" "\n" "void f()\n" "{\n" " A a;\n" " memset(&a, 0, sizeof(a));\n" "}"); ASSERT_EQUALS("[test.cpp:7]: (error) Using 'memset' on struct that contains a 'std::vector'.\n", errout.str()); checkNoMemset("class A\n" "{ std::vector< std::vector > ints; };\n" "\n" "void f()\n" "{\n" " A a;\n" " memset(&a, 0, sizeof(A));\n" "}"); ASSERT_EQUALS("[test.cpp:7]: (error) Using 'memset' on class that contains a 'std::vector'.\n", errout.str()); checkNoMemset("struct A\n" "{ std::vector< std::vector > ints; };\n" "\n" "void f()\n" "{\n" " A a;\n" " memset(&a, 0, sizeof(A));\n" "}"); ASSERT_EQUALS("[test.cpp:7]: (error) Using 'memset' on struct that contains a 'std::vector'.\n", errout.str()); checkNoMemset("struct A\n" "{ std::vector< std::vector > ints; };\n" "\n" "void f()\n" "{\n" " A a;\n" " memset(&a, 0, sizeof(a));\n" "}"); ASSERT_EQUALS("[test.cpp:7]: (error) Using 'memset' on struct that contains a 'std::vector'.\n", errout.str()); checkNoMemset("struct A\n" "{ std::vector ints; };\n" "\n" "void f()\n" "{\n" " A a;\n" " memset(&a, 0, sizeof(A));\n" "}"); ASSERT_EQUALS("[test.cpp:7]: (error) Using 'memset' on struct that contains a 'std::vector'.\n", errout.str()); checkNoMemset("struct A {\n" " std::vector buf;\n" " operator int*() {return &buf[0];}\n" "};\n" "void f() {\n" " A a;\n" " memset(a, 0, 100);\n" "}"); ASSERT_EQUALS("", errout.str()); // #4460 checkNoMemset("struct C {\n" " std::string s;\n" "};\n" "int foo() {\n" " C* c1[10][10];\n" " C* c2[10];\n" " C c3[10][10];\n" " C** c4 = new C*[10];\n" " memset(**c1, 0, 10);\n" " memset(*c1, 0, 10);\n" " memset(*c2, 0, 10);\n" " memset(*c3, 0, 10);\n" " memset(*c4, 0, 10);\n" " memset(c2, 0, 10);\n" " memset(c3, 0, 10);\n" "}"); ASSERT_EQUALS("[test.cpp:9]: (error) Using 'memset' on struct that contains a 'std::string'.\n" "[test.cpp:11]: (error) Using 'memset' on struct that contains a 'std::string'.\n" "[test.cpp:12]: (error) Using 'memset' on struct that contains a 'std::string'.\n" "[test.cpp:13]: (error) Using 'memset' on struct that contains a 'std::string'.\n", errout.str()); // Ticket #6953 checkNoMemset("typedef float realnum;\n" "struct multilevel_data {\n" " realnum *GammaInv;\n" " realnum data[1];\n" "};\n" "void *new_internal_data() const {\n" " multilevel_data *d = (multilevel_data *) malloc(sizeof(multilevel_data));\n" " memset(d, 0, sizeof(multilevel_data));\n" " return (void*) d;\n" "}"); ASSERT_EQUALS("[test.cpp:8]: (portability) Using memset() on struct which contains a floating point number.\n", errout.str()); } void memsetOnStdPodType() { // Ticket #5901 Settings settings; const char xmldata[] = "\n" "\n" " \n" " \n" ""; tinyxml2::XMLDocument doc; doc.Parse(xmldata, sizeof(xmldata)); settings.library.load(doc); checkNoMemset("class A {\n" " std::array ints;\n" "};\n" "void f() {\n" " A a;\n" " memset(&a, 0, sizeof(A));\n" "}"); ASSERT_EQUALS("", errout.str()); // std::array is POD (#5481) checkNoMemset("struct st {\n" " std::uint8_t a;\n" " std::atomic_bool b;\n" "};\n" "\n" "void f() {\n" " st s;\n" " std::memset(&s, 0, sizeof(st));\n" "}", settings); ASSERT_EQUALS("", errout.str()); } void memsetOnFloat() { checkNoMemset("struct A {\n" " float f;\n" "};\n" "void f() {\n" " A a;\n" " memset(&a, 0, sizeof(A));\n" "}"); ASSERT_EQUALS("[test.cpp:6]: (portability) Using memset() on struct which contains a floating point number.\n", errout.str()); checkNoMemset("struct A {\n" " float f[4];\n" "};\n" "void f() {\n" " A a;\n" " memset(&a, 0, sizeof(A));\n" "}"); ASSERT_EQUALS("[test.cpp:6]: (portability) Using memset() on struct which contains a floating point number.\n", errout.str()); checkNoMemset("struct A {\n" " float f[4];\n" "};\n" "void f(const A& b) {\n" " A a;\n" " memcpy(&a, &b, sizeof(A));\n" "}"); ASSERT_EQUALS("", errout.str()); checkNoMemset("struct A {\n" " float* f;\n" "};\n" "void f() {\n" " A a;\n" " memset(&a, 0, sizeof(A));\n" "}"); ASSERT_EQUALS("", errout.str()); } void memsetOnUnknown() { checkNoMemset("void clang_tokenize(CXToken **Tokens) {\n" " *Tokens = (CXToken *)malloc(sizeof(CXToken) * CXTokens.size());\n" " memmove(*Tokens, CXTokens.data(), sizeof(CXToken) * CXTokens.size());\n" "}"); ASSERT_EQUALS("", errout.str()); } void mallocOnClass() { checkNoMemset("class C { C() {} };\n" "void foo(C*& p) {\n" " p = malloc(sizeof(C));\n" "}"); ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:1]: (warning) Memory for class instance allocated with malloc(), but class provides constructors.\n", errout.str()); checkNoMemset("class C { C(int z, Foo bar) { bar(); } };\n" "void foo(C*& p) {\n" " p = malloc(sizeof(C));\n" "}"); ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:1]: (warning) Memory for class instance allocated with malloc(), but class provides constructors.\n", errout.str()); checkNoMemset("struct C { C() {} };\n" "void foo(C*& p) {\n" " p = realloc(p, sizeof(C));\n" "}"); ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:1]: (warning) Memory for class instance allocated with realloc(), but class provides constructors.\n", errout.str()); checkNoMemset("struct C { virtual void bar(); };\n" "void foo(C*& p) {\n" " p = malloc(sizeof(C));\n" "}"); ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:1]: (error) Memory for class instance allocated with malloc(), but class contains a virtual function.\n", errout.str()); checkNoMemset("struct C { std::string s; };\n" "void foo(C*& p) {\n" " p = malloc(sizeof(C));\n" "}"); ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:1]: (error) Memory for class instance allocated with malloc(), but class contains a 'std::string'.\n", errout.str()); checkNoMemset("class C { };\n" // C-Style class/struct "void foo(C*& p) {\n" " p = malloc(sizeof(C));\n" "}"); ASSERT_EQUALS("", errout.str()); checkNoMemset("struct C { C() {} };\n" "void foo(C*& p) {\n" " p = new C();\n" "}"); ASSERT_EQUALS("", errout.str()); checkNoMemset("class C { C() {} };\n" "void foo(D*& p) {\n" // Unknown type " p = malloc(sizeof(C));\n" "}"); ASSERT_EQUALS("", errout.str()); } #define checkThisSubtraction(code) checkThisSubtraction_(code, __FILE__, __LINE__) void checkThisSubtraction_(const char code[], const char* file, int line) { // Clear the error log errout.str(""); // Tokenize.. Tokenizer tokenizer(&settings1, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); // Check.. CheckClass checkClass(&tokenizer, &settings1, this); checkClass.thisSubtraction(); } void this_subtraction() { checkThisSubtraction("; this-x ;"); ASSERT_EQUALS("[test.cpp:1]: (warning) Suspicious pointer subtraction. Did you intend to write '->'?\n", errout.str()); checkThisSubtraction("; *this = *this-x ;"); ASSERT_EQUALS("", errout.str()); checkThisSubtraction("; *this = *this-x ;\n" "this-x ;"); ASSERT_EQUALS("[test.cpp:2]: (warning) Suspicious pointer subtraction. Did you intend to write '->'?\n", errout.str()); checkThisSubtraction("; *this = *this-x ;\n" "this-x ;\n" "this-x ;"); ASSERT_EQUALS("[test.cpp:2]: (warning) Suspicious pointer subtraction. Did you intend to write '->'?\n" "[test.cpp:3]: (warning) Suspicious pointer subtraction. Did you intend to write '->'?\n", errout.str()); } #define checkConst(...) checkConst_(__FILE__, __LINE__, __VA_ARGS__) void checkConst_(const char* file, int line, const char code[], Settings *s = nullptr, bool inconclusive = true) { // Clear the error log errout.str(""); // Check.. if (!s) s = &settings0; s->certainty.setEnabled(Certainty::inconclusive, inconclusive); // Tokenize.. Tokenizer tokenizer(s, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); CheckClass checkClass(&tokenizer, s, this); (checkClass.checkConst)(); } void const1() { checkConst("class Fred {\n" " int a;\n" " int getA() { return a; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Technically the member function 'Fred::getA' can be const.\n", errout.str()); checkConst("class Fred {\n" " const std::string foo() { return \"\"; }\n" "};"); ASSERT_EQUALS("[test.cpp:2]: (performance, inconclusive) Technically the member function 'Fred::foo' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("class Fred {\n" " std::string s;\n" " const std::string & foo() { return \"\"; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::foo' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); // constructors can't be const.. checkConst("class Fred {\n" " int a;\n" "public:\n" " Fred() { }\n" "};"); ASSERT_EQUALS("", errout.str()); // assignment through |=.. checkConst("class Fred {\n" " int a;\n" " int setA() { a |= true; }\n" "};"); ASSERT_EQUALS("", errout.str()); // functions with a call to a member function can only be const, if that member function is const, too.. (#1305) checkConst("class foo {\n" "public:\n" " int x;\n" " void a() { x = 1; }\n" " void b() { a(); }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" "public:\n" " int x;\n" " int a() const { return x; }\n" " void b() { a(); }\n" "};"); ASSERT_EQUALS("[test.cpp:5]: (style, inconclusive) Technically the member function 'Fred::b' can be const.\n", errout.str()); checkConst("class Fred {\n" "public:\n" " int x;\n" " void b() { a(); }\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (performance, inconclusive) Technically the member function 'Fred::b' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); // static functions can't be const.. checkConst("class foo\n" "{\n" "public:\n" " static unsigned get()\n" " { return 0; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " const std::string foo() const throw() { return \"\"; }\n" "};"); ASSERT_EQUALS("[test.cpp:2]: (performance, inconclusive) Technically the member function 'Fred::foo' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); } void const2() { // ticket 1344 // assignment to variable can't be const checkConst("class Fred {\n" " std::string s;\n" " void foo() { s = \"\"; }\n" "};"); ASSERT_EQUALS("", errout.str()); // assignment to function argument reference can be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string & a) { a = s; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Technically the member function 'Fred::foo' can be const.\n", errout.str()); // assignment to variable can't be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string & a) { s = a; }\n" "};"); ASSERT_EQUALS("", errout.str()); // assignment to function argument references can be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string & a, std::string & b) { a = s; b = s; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Technically the member function 'Fred::foo' can be const.\n", errout.str()); // assignment to variable, can't be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string & a, std::string & b) { s = a; s = b; }\n" "};"); ASSERT_EQUALS("", errout.str()); // assignment to variable, can't be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string & a, std::string & b) { s = a; b = a; }\n" "};"); ASSERT_EQUALS("", errout.str()); // assignment to variable, can't be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string & a, std::string & b) { a = s; s = b; }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const3() { // assignment to function argument pointer can be const checkConst("class Fred {\n" " int s;\n" " void foo(int * a) { *a = s; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Technically the member function 'Fred::foo' can be const.\n", errout.str()); // assignment to variable, can't be const checkConst("class Fred {\n" " int s;\n" " void foo(int * a) { s = *a; }\n" "};"); ASSERT_EQUALS("", errout.str()); // assignment to function argument pointers can be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string * a, std::string * b) { *a = s; *b = s; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Technically the member function 'Fred::foo' can be const.\n", errout.str()); // assignment to variable, can't be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string * a, std::string * b) { s = *a; s = *b; }\n" "};"); ASSERT_EQUALS("", errout.str()); // assignment to variable, can't be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string * a, std::string * b) { s = *a; *b = s; }\n" "};"); ASSERT_EQUALS("", errout.str()); // assignment to variable, can't be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string * a, std::string * b) { *a = s; s = b; }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const4() { checkConst("class Fred {\n" " int a;\n" " int getA();\n" "};\n" "int Fred::getA() { return a; }"); ASSERT_EQUALS("[test.cpp:5] -> [test.cpp:3]: (style, inconclusive) Technically the member function 'Fred::getA' can be const.\n", errout.str()); checkConst("class Fred {\n" " std::string s;\n" " const std::string & foo();\n" "};\n" "const std::string & Fred::foo() { return \"\"; }"); ASSERT_EQUALS("[test.cpp:5] -> [test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::foo' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); // functions with a function call to a non-const member can't be const.. (#1305) checkConst("class Fred\n" "{\n" "public:\n" " int x;\n" " void a() { x = 1; }\n" " void b();\n" "};\n" "void Fred::b() { a(); }"); ASSERT_EQUALS("", errout.str()); // static functions can't be const.. checkConst("class Fred\n" "{\n" "public:\n" " static unsigned get();\n" "};\n" "static unsigned Fred::get() { return 0; }"); ASSERT_EQUALS("", errout.str()); // assignment to variable can't be const checkConst("class Fred {\n" " std::string s;\n" " void foo();\n" "};\n" "void Fred::foo() { s = \"\"; }"); ASSERT_EQUALS("", errout.str()); // assignment to function argument reference can be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string & a);\n" "};\n" "void Fred::foo(std::string & a) { a = s; }"); ASSERT_EQUALS("[test.cpp:5] -> [test.cpp:3]: (style, inconclusive) Technically the member function 'Fred::foo' can be const.\n", errout.str()); // assignment to variable can't be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string & a);\n" "};\n" "void Fred::foo(std::string & a) { s = a; }"); ASSERT_EQUALS("", errout.str()); // assignment to function argument references can be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string & a, std::string & b);\n" "};\n" "void Fred::foo(std::string & a, std::string & b) { a = s; b = s; }"); ASSERT_EQUALS("[test.cpp:5] -> [test.cpp:3]: (style, inconclusive) Technically the member function 'Fred::foo' can be const.\n", errout.str()); // assignment to variable, can't be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string & a, std::string & b);\n" "};\n" "void Fred::foo(std::string & a, std::string & b) { s = a; s = b; }"); ASSERT_EQUALS("", errout.str()); // assignment to variable, can't be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string & a, std::string & b);\n" "};\n" "void Fred::foo(std::string & a, std::string & b) { s = a; b = a; }"); ASSERT_EQUALS("", errout.str()); // assignment to variable, can't be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string & a, std::string & b);\n" "};\n" "void Fred::foo(std::string & a, std::string & b) { a = s; s = b; }"); ASSERT_EQUALS("", errout.str()); // assignment to function argument pointer can be const checkConst("class Fred {\n" " int s;\n" " void foo(int * a);\n" "};\n" "void Fred::foo(int * a) { *a = s; }"); ASSERT_EQUALS("[test.cpp:5] -> [test.cpp:3]: (style, inconclusive) Technically the member function 'Fred::foo' can be const.\n", errout.str()); // assignment to variable, can't be const checkConst("class Fred {\n" " int s;\n" " void foo(int * a);\n" "};\n" "void Fred::foo(int * a) { s = *a; }"); ASSERT_EQUALS("", errout.str()); // assignment to function argument pointers can be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string * a, std::string * b);\n" "};\n" "void Fred::foo(std::string * a, std::string * b) { *a = s; *b = s; }"); ASSERT_EQUALS("[test.cpp:5] -> [test.cpp:3]: (style, inconclusive) Technically the member function 'Fred::foo' can be const.\n", errout.str()); // assignment to variable, can't be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string * a, std::string * b);\n" "};\n" "void Fred::foo(std::string * a, std::string * b) { s = *a; s = *b; }"); ASSERT_EQUALS("", errout.str()); // assignment to variable, can't be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string * a, std::string * b);\n" "};\n" "void Fred::foo(std::string * a, std::string * b) { s = *a; *b = s; }"); ASSERT_EQUALS("", errout.str()); // assignment to variable, can't be const checkConst("class Fred {\n" " std::string s;\n" " void foo(std::string * a, std::string * b);\n" "};\n" "void Fred::foo(std::string * a, std::string * b) { *a = s; s = b; }"); ASSERT_EQUALS("", errout.str()); // check functions with same name checkConst("class Fred {\n" " std::string s;\n" " void foo();\n" " void foo(std::string & a);\n" " void foo(const std::string & a);\n" "};\n" "void Fred::foo() { }" "void Fred::foo(std::string & a) { a = s; }" "void Fred::foo(const std::string & a) { s = a; }"); ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::foo' can be static (but you may consider moving to unnamed namespace).\n" "[test.cpp:7] -> [test.cpp:4]: (style, inconclusive) Technically the member function 'Fred::foo' can be const.\n", errout.str()); // check functions with different or missing parameter names checkConst("class Fred {\n" " std::string s;\n" " void foo1(int, int);\n" " void foo2(int a, int b);\n" " void foo3(int, int b);\n" " void foo4(int a, int);\n" " void foo5(int a, int b);\n" "};\n" "void Fred::foo1(int a, int b) { }\n" "void Fred::foo2(int c, int d) { }\n" "void Fred::foo3(int a, int b) { }\n" "void Fred::foo4(int a, int b) { }\n" "void Fred::foo5(int, int) { }"); ASSERT_EQUALS("[test.cpp:9] -> [test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::foo1' can be static (but you may consider moving to unnamed namespace).\n" "[test.cpp:10] -> [test.cpp:4]: (performance, inconclusive) Technically the member function 'Fred::foo2' can be static (but you may consider moving to unnamed namespace).\n" "[test.cpp:11] -> [test.cpp:5]: (performance, inconclusive) Technically the member function 'Fred::foo3' can be static (but you may consider moving to unnamed namespace).\n" "[test.cpp:12] -> [test.cpp:6]: (performance, inconclusive) Technically the member function 'Fred::foo4' can be static (but you may consider moving to unnamed namespace).\n" "[test.cpp:13] -> [test.cpp:7]: (performance, inconclusive) Technically the member function 'Fred::foo5' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); // check nested classes checkConst("class Fred {\n" " class A {\n" " int a;\n" " int getA() { return a; }\n" " };\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'Fred::A::getA' can be const.\n", errout.str()); checkConst("class Fred {\n" " class A {\n" " int a;\n" " int getA();\n" " };\n" " int A::getA() { return a; }\n" "};"); ASSERT_EQUALS("[test.cpp:6] -> [test.cpp:4]: (style, inconclusive) Technically the member function 'Fred::A::getA' can be const.\n", errout.str()); checkConst("class Fred {\n" " class A {\n" " int a;\n" " int getA();\n" " };\n" "};\n" "int Fred::A::getA() { return a; }"); ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:4]: (style, inconclusive) Technically the member function 'Fred::A::getA' can be const.\n", errout.str()); // check deeply nested classes checkConst("class Fred {\n" " class B {\n" " int b;\n" " int getB() { return b; }\n" " class A {\n" " int a;\n" " int getA() { return a; }\n" " };\n" " };\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'Fred::B::getB' can be const.\n" "[test.cpp:7]: (style, inconclusive) Technically the member function 'Fred::B::A::getA' can be const.\n" , errout.str()); checkConst("class Fred {\n" " class B {\n" " int b;\n" " int getB();\n" " class A {\n" " int a;\n" " int getA();\n" " };\n" " int A::getA() { return a; }\n" " };\n" " int B::getB() { return b; }\n" "};"); ASSERT_EQUALS("[test.cpp:11] -> [test.cpp:4]: (style, inconclusive) Technically the member function 'Fred::B::getB' can be const.\n" "[test.cpp:9] -> [test.cpp:7]: (style, inconclusive) Technically the member function 'Fred::B::A::getA' can be const.\n", errout.str()); checkConst("class Fred {\n" " class B {\n" " int b;\n" " int getB();\n" " class A {\n" " int a;\n" " int getA();\n" " };\n" " };\n" " int B::A::getA() { return a; }\n" " int B::getB() { return b; }\n" "};"); ASSERT_EQUALS("[test.cpp:11] -> [test.cpp:4]: (style, inconclusive) Technically the member function 'Fred::B::getB' can be const.\n" "[test.cpp:10] -> [test.cpp:7]: (style, inconclusive) Technically the member function 'Fred::B::A::getA' can be const.\n", errout.str()); checkConst("class Fred {\n" " class B {\n" " int b;\n" " int getB();\n" " class A {\n" " int a;\n" " int getA();\n" " };\n" " };\n" "};\n" "int Fred::B::A::getA() { return a; }\n" "int Fred::B::getB() { return b; }"); ASSERT_EQUALS("[test.cpp:12] -> [test.cpp:4]: (style, inconclusive) Technically the member function 'Fred::B::getB' can be const.\n" "[test.cpp:11] -> [test.cpp:7]: (style, inconclusive) Technically the member function 'Fred::B::A::getA' can be const.\n", errout.str()); } // operator< can often be const void constoperator1() { checkConst("struct Fred {\n" " int a;\n" " bool operator<(const Fred &f) { return a < f.a; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Technically the member function 'Fred::operator<' can be const.\n", errout.str()); } // operator<< void constoperator2() { checkConst("struct Foo {\n" " void operator<<(int);\n" "};\n" "struct Fred {\n" " Foo foo;\n" " void x()\n" " {\n" " foo << 123;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("struct Foo {\n" " void operator<<(int);\n" "};\n" "struct Fred {\n" " Foo foo;\n" " void x()\n" " {\n" " std::cout << foo << 123;\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:6]: (style, inconclusive) Technically the member function 'Fred::x' can be const.\n", errout.str()); } void constoperator3() { checkConst("struct Fred {\n" " int array[10];\n" " int const & operator [] (unsigned int index) const { return array[index]; }\n" " int & operator [] (unsigned int index) { return array[index]; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("struct Fred {\n" " int array[10];\n" " int const & operator [] (unsigned int index) { return array[index]; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Technically the member function 'Fred::operator[]' can be const.\n", errout.str()); } void constoperator4() { // #7953 checkConst("class A {\n" " int c;\n" "public:\n" " operator int*() { return &c; };\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class A {\n" " int c;\n" "public:\n" " operator const int*() { return &c; };\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::operatorconstint*' can be const.\n", errout.str()); // #2375 checkConst("struct Fred {\n" " int array[10];\n" " typedef int* (Fred::*UnspecifiedBoolType);\n" " operator UnspecifiedBoolType() { };\n" "};"); TODO_ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'Fred::operatorint**' can be const.\n", "", errout.str()); checkConst("struct Fred {\n" " int array[10];\n" " typedef int* (Fred::*UnspecifiedBoolType);\n" " operator UnspecifiedBoolType() { array[0] = 0; };\n" "};"); ASSERT_EQUALS("", errout.str()); } void constoperator5() { // ticket #3252 checkConst("class A {\n" " int c;\n" "public:\n" " operator int& () {return c}\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class A {\n" " int c;\n" "public:\n" " operator const int& () {return c}\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::operatorconstint&' can be const.\n", errout.str()); checkConst("class A {\n" " int c;\n" "public:\n" " operator int () {return c}\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::operatorint' can be const.\n", errout.str()); } void constoperator6() { // ticket #8669 checkConst("class A {\n" " int c;\n" " void f() { os >> *this; }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const5() { // ticket #1482 checkConst("class A {\n" " int a;\n" " bool foo(int i)\n" " {\n" " bool same;\n" " same = (i == a);\n" " return same;\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Technically the member function 'A::foo' can be const.\n", errout.str()); } void const6() { // ticket #1491 checkConst("class foo {\n" "public:\n" "};\n" "void bar() {}"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred\n" "{\n" "public:\n" " void foo() { }\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (performance, inconclusive) Technically the member function 'Fred::foo' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("struct fast_string\n" "{\n" " union\n" " {\n" " char buff[100];\n" " };\n" " void set_type(char t);\n" "};\n" "inline void fast_string::set_type(char t)\n" "{\n" " buff[10] = t;\n" "}"); ASSERT_EQUALS("", errout.str()); } void const7() { checkConst("class foo {\n" " int a;\n" "public:\n" " void set(int i) { a = i; }\n" " void set(const foo & f) { *this = f; }\n" "};\n" "void bar() {}"); ASSERT_EQUALS("", errout.str()); } void const8() { // ticket #1517 checkConst("class A {\n" "public:\n" " A():m_strValue(\"\"){}\n" " std::string strGetString() { return m_strValue; }\n" "private:\n" " std::string m_strValue;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::strGetString' can be const.\n", errout.str()); } void const9() { // ticket #1515 checkConst("class wxThreadInternal {\n" "public:\n" " void SetExitCode(wxThread::ExitCode exitcode) { m_exitcode = exitcode; }\n" "private:\n" " wxThread::ExitCode m_exitcode;\n" "};"); ASSERT_EQUALS("", errout.str()); } void const10() { // ticket #1522 checkConst("class A {\n" "public:\n" " int foo() { return x = 0; }\n" "private:\n" " int x;\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class A {\n" "public:\n" " int foo() { return x ? x : x = 0; }\n" "private:\n" " int x;\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class A {\n" "public:\n" " int foo() { return x ? x = 0 : x; }\n" "private:\n" " int x;\n" "};"); ASSERT_EQUALS("", errout.str()); } void const11() { // ticket #1529 checkConst("class A {\n" "public:\n" " void set(struct tm time) { m_time = time; }\n" "private:\n" " struct tm m_time;\n" "};"); ASSERT_EQUALS("", errout.str()); } void const12() { // ticket #1525 checkConst("class A {\n" "public:\n" " int foo() { x = 0; }\n" "private:\n" " mutable int x;\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Technically the member function 'A::foo' can be const.\n", errout.str()); } void const13() { // ticket #1519 checkConst("class A {\n" "public:\n" " A(){}\n" " std::vector GetVec() {return m_vec;}\n" " std::pair GetPair() {return m_pair;}\n" "private:\n" " std::vector m_vec;\n" " std::pair m_pair;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetVec' can be const.\n" "[test.cpp:5]: (style, inconclusive) Technically the member function 'A::GetPair' can be const.\n", errout.str()); checkConst("class A {\n" "public:\n" " A(){}\n" " const std::vector & GetVec() {return m_vec;}\n" " const std::pair & GetPair() {return m_pair;}\n" "private:\n" " std::vector m_vec;\n" " std::pair m_pair;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetVec' can be const.\n" "[test.cpp:5]: (style, inconclusive) Technically the member function 'A::GetPair' can be const.\n", errout.str()); } void const14() { // extends ticket 1519 checkConst("class A {\n" "public:\n" " A(){}\n" " std::pair,double> GetPair() {return m_pair;}\n" "private:\n" " std::pair,double> m_pair;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetPair' can be const.\n", errout.str()); checkConst("class A {\n" "public:\n" " A(){}\n" " const std::pair,double>& GetPair() {return m_pair;}\n" "private:\n" " std::pair,double> m_pair;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetPair' can be const.\n", errout.str()); checkConst("class A {\n" "public:\n" " A(){}\n" " std::pair,double>& GetPair() {return m_pair;}\n" "private:\n" " std::pair,double> m_pair;\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("using namespace std;" "class A {\n" "public:\n" " A(){}\n" " pair GetPair() {return m_pair;}\n" "private:\n" " pair m_pair;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetPair' can be const.\n", errout.str()); checkConst("using namespace std;" "class A {\n" "public:\n" " A(){}\n" " const pair & GetPair() {return m_pair;}\n" "private:\n" " pair m_pair;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetPair' can be const.\n", errout.str()); checkConst("using namespace std;" "class A {\n" "public:\n" " A(){}\n" " pair & GetPair() {return m_pair;}\n" "private:\n" " pair m_pair;\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class A {\n" "public:\n" " A(){}\n" " std::pair< int,std::vector > GetPair() {return m_pair;}\n" "private:\n" " std::pair< int,std::vector > m_pair;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetPair' can be const.\n", errout.str()); checkConst("class A {\n" "public:\n" " A(){}\n" " const std::pair< int,std::vector >& GetPair() {return m_pair;}\n" "private:\n" " std::pair< int,std::vector > m_pair;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetPair' can be const.\n", errout.str()); checkConst("class A {\n" "public:\n" " A(){}\n" " std::pair< int,std::vector >& GetPair() {return m_pair;}\n" "private:\n" " std::pair< int,std::vector > m_pair;\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("using namespace std;" "class A {\n" "public:\n" " A(){}\n" " pair< vector, int > GetPair() {return m_pair;}\n" "private:\n" " pair< vector, int > m_pair;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetPair' can be const.\n", errout.str()); checkConst("using namespace std;" "class A {\n" "public:\n" " A(){}\n" " const pair< vector, int >& GetPair() {return m_pair;}\n" "private:\n" " pair< vector, int > m_pair;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetPair' can be const.\n", errout.str()); checkConst("using namespace std;" "class A {\n" "public:\n" " A(){}\n" " pair< vector, int >& GetPair() {return m_pair;}\n" "private:\n" " pair< vector, int > m_pair;\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class A {\n" "public:\n" " A(){}\n" " std::pair< std::vector,std::vector > GetPair() {return m_pair;}\n" "private:\n" " std::pair< std::vector,std::vector > m_pair;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetPair' can be const.\n", errout.str()); checkConst("class A {\n" "public:\n" " A(){}\n" " const std::pair< std::vector,std::vector >& GetPair() {return m_pair;}\n" "private:\n" " std::pair< std::vector,std::vector > m_pair;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetPair' can be const.\n", errout.str()); checkConst("class A {\n" "public:\n" " A(){}\n" " std::pair< std::vector,std::vector >& GetPair() {return m_pair;}\n" "private:\n" " std::pair< std::vector,std::vector > m_pair;\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class A {\n" "public:\n" " A(){}\n" " std::pair< std::pair < int, char > , int > GetPair() {return m_pair;}\n" "private:\n" " std::pair< std::pair < int, char > , int > m_pair;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetPair' can be const.\n", errout.str()); checkConst("class A {\n" "public:\n" " A(){}\n" " const std::pair< std::pair < int, char > , int > & GetPair() {return m_pair;}\n" "private:\n" " std::pair< std::pair < int, char > , int > m_pair;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetPair' can be const.\n", errout.str()); checkConst("class A {\n" "public:\n" " A(){}\n" " std::pair< std::pair < int, char > , int > & GetPair() {return m_pair;}\n" "private:\n" " std::pair< std::pair < int, char > , int > m_pair;\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class A {\n" "public:\n" " A(){}\n" " std::pair< int , std::pair < int, char > > GetPair() {return m_pair;}\n" "private:\n" " std::pair< int , std::pair < int, char > > m_pair;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetPair' can be const.\n", errout.str()); checkConst("class A {\n" "public:\n" " A(){}\n" " const std::pair< int , std::pair < int, char > >& GetPair() {return m_pair;}\n" "private:\n" " std::pair< int , std::pair < int, char > > m_pair;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetPair' can be const.\n", errout.str()); checkConst("class A {\n" "public:\n" " A(){}\n" " std::pair< int , std::pair < int, char > >& GetPair() {return m_pair;}\n" "private:\n" " std::pair< int , std::pair < int, char > > m_pair;\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("using namespace std;" "class A {\n" "public:\n" " A(){}\n" " vector GetVec() {return m_Vec;}\n" "private:\n" " vector m_Vec;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetVec' can be const.\n", errout.str()); checkConst("using namespace std;" "class A {\n" "public:\n" " A(){}\n" " const vector& GetVec() {return m_Vec;}\n" "private:\n" " vector m_Vec;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::GetVec' can be const.\n", errout.str()); checkConst("using namespace std;" "class A {\n" "public:\n" " A(){}\n" " vector& GetVec() {return m_Vec;}\n" "private:\n" " vector m_Vec;\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class A {\n" "public:\n" " int * * foo() { return &x; }\n" "private:\n" " const int * x;\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class A {\n" "public:\n" " const int ** foo() { return &x; }\n" "private:\n" " const int * x;\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Technically the member function 'A::foo' can be const.\n", errout.str()); } void const15() { checkConst("class Fred {\n" " unsigned long long int a;\n" " unsigned long long int getA() { return a; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Technically the member function 'Fred::getA' can be const.\n", errout.str()); // constructors can't be const.. checkConst("class Fred {\n" " unsigned long long int a;\n" "public:\n" " Fred() { }\n" "};"); ASSERT_EQUALS("", errout.str()); // assignment through |=.. checkConst("class Fred {\n" " unsigned long long int a;\n" " unsigned long long int setA() { a |= true; }\n" "};"); ASSERT_EQUALS("", errout.str()); // static functions can't be const.. checkConst("class foo\n" "{\n" "public:\n" " static unsigned long long int get()\n" " { return 0; }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const16() { // ticket #1551 checkConst("class Fred {\n" " int a;\n" " void set(int i) { Fred::a = i; }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const17() { // ticket #1552 checkConst("class Fred {\n" "public:\n" " void set(int i, int j) { a[i].k = i; }\n" "private:\n" " struct { int k; } a[4];\n" "};"); ASSERT_EQUALS("", errout.str()); } void const18() { checkConst("class Fred {\n" "static int x;\n" "public:\n" " void set(int i) { x = i; }\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (performance, inconclusive) Technically the member function 'Fred::set' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); } void const19() { // ticket #1612 checkConst("using namespace std;\n" "class Fred {\n" "private:\n" " std::string s;\n" "public:\n" " void set(std::string ss) { s = ss; }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const20() { // ticket #1602 checkConst("class Fred {\n" " int x : 3;\n" "public:\n" " void set(int i) { x = i; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " list x;\n" "public:\n" " list get() { return x; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " list x;\n" "public:\n" " list get() { return x; }\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'Fred::get' can be const.\n", errout.str()); checkConst("class Fred {\n" " std::list x;\n" "public:\n" " std::list get() { return x; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " std::list x;\n" "public:\n" " std::list get() { return x; }\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'Fred::get' can be const.\n", errout.str()); } void const21() { // ticket #1683 checkConst("class A\n" "{\n" "private:\n" " const char * l1[10];\n" "public:\n" " A()\n" " {\n" " for (int i = 0 ; i < 10; l1[i] = NULL, i++);\n" " }\n" " void f1() { l1[0] = \"Hello\"; }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const22() { checkConst("class A\n" "{\n" "private:\n" " B::C * v1;\n" "public:\n" " void f1() { v1 = 0; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class A\n" "{\n" "private:\n" " B::C * v1[0];\n" "public:\n" " void f1() { v1[0] = 0; }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const23() { checkConst("class Class {\n" "public:\n" " typedef Template Type;\n" " typedef Template2 Type2;\n" " void set_member(Type2 m) { _m = m; }\n" "private:\n" " Type2 _m;\n" "};"); ASSERT_EQUALS("", errout.str()); } void const24() { checkConst("class Class {\n" "public:\n" "void Settings::SetSetting(QString strSetting, QString strNewVal)\n" "{\n" " (*m_pSettings)[strSetting] = strNewVal;\n" "}\n" "private:\n" " std::map *m_pSettings;\n" "};"); ASSERT_EQUALS("", errout.str()); } void const25() { // ticket #1724 checkConst("class A{\n" "public:\n" "A(){m_strVal=\"\";}\n" "std::string strGetString() const\n" "{return m_strVal.c_str();}\n" "const std::string strGetString1() const\n" "{return m_strVal.c_str();}\n" "private:\n" "std::string m_strVal;\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class A{\n" "public:\n" "A(){m_strVal=\"\";}\n" "std::string strGetString()\n" "{return m_strVal.c_str();}\n" "private:\n" "std::string m_strVal;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::strGetString' can be const.\n", errout.str()); checkConst("class A{\n" "public:\n" "A(){m_strVal=\"\";}\n" "const std::string strGetString1()\n" "{return m_strVal.c_str();}\n" "private:\n" "std::string m_strVal;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::strGetString1' can be const.\n", errout.str()); checkConst("class A{\n" "public:\n" "A(){m_strVec.push_back(\"\");}\n" "size_t strGetSize()\n" "{return m_strVec.size();}\n" "private:\n" "std::vector m_strVec;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::strGetSize' can be const.\n", errout.str()); checkConst("class A{\n" "public:\n" "A(){m_strVec.push_back(\"\");}\n" "bool strGetEmpty()\n" "{return m_strVec.empty();}\n" "private:\n" "std::vector m_strVec;\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'A::strGetEmpty' can be const.\n", errout.str()); } void const26() { // ticket #1847 checkConst("class DelayBase {\n" "public:\n" "void swapSpecificDelays(int index1, int index2) {\n" " std::swap(delays_[index1], delays_[index2]);\n" "}\n" "float delays_[4];\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("struct DelayBase {\n" " float swapSpecificDelays(int index1) {\n" " return delays_[index1];\n" " }\n" " float delays_[4];\n" "};"); ASSERT_EQUALS("[test.cpp:2]: (style, inconclusive) Technically the member function 'DelayBase::swapSpecificDelays' can be const.\n", errout.str()); } void const27() { // ticket #1882 checkConst("class A {\n" "public:\n" " A(){m_d=1.0; m_iRealVal=2.0;}\n" " double dGetValue();\n" "private:\n" " double m_d;\n" " double m_iRealVal;\n" "};\n" "double A::dGetValue() {\n" " double dRet = m_iRealVal;\n" " if( m_d != 0 )\n" " return m_iRealVal / m_d;\n" " return dRet;\n" "};", nullptr, true); ASSERT_EQUALS("[test.cpp:9] -> [test.cpp:4]: (style, inconclusive) Technically the member function 'A::dGetValue' can be const.\n", errout.str()); } void const28() { // ticket #1883 checkConst("class P {\n" "public:\n" " P() { x=0.0; y=0.0; }\n" " double x,y;\n" "};\n" "class A : public P {\n" "public:\n" " A():P(){}\n" " void SetPos(double xPos, double yPos) {\n" " x=xPos;\n" " y=yPos;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class AA : public P {\n" "public:\n" " AA():P(){}\n" " inline void vSetXPos(int x_)\n" " {\n" " UnknownScope::x = x_;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class AA {\n" "public:\n" " AA():P(){}\n" " inline void vSetXPos(int x_)\n" " {\n" " UnknownScope::x = x_;\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (performance, inconclusive) Technically the member function 'AA::vSetXPos' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); } void const29() { // ticket #1922 checkConst("class test {\n" " public:\n" " test();\n" " const char* get() const;\n" " char* get();\n" " private:\n" " char* value_;\n" "};\n" "test::test()\n" "{\n" " value_ = 0;\n" "}\n" "const char* test::get() const\n" "{\n" " return value_;\n" "}\n" "char* test::get()\n" "{\n" " return value_;\n" "}"); ASSERT_EQUALS("", errout.str()); } void const30() { // check for false negatives checkConst("class Base {\n" "public:\n" " int a;\n" "};\n" "class Derived : public Base {\n" "public:\n" " int get() {\n" " return a;\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:7]: (style, inconclusive) Technically the member function 'Derived::get' can be const.\n", errout.str()); checkConst("class Base1 {\n" "public:\n" " int a;\n" "};\n" "class Base2 {\n" "public:\n" " int b;\n" "};\n" "class Derived : public Base1, public Base2 {\n" "public:\n" " int getA() {\n" " return a;\n" " }\n" " int getB() {\n" " return b;\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:11]: (style, inconclusive) Technically the member function 'Derived::getA' can be const.\n" "[test.cpp:14]: (style, inconclusive) Technically the member function 'Derived::getB' can be const.\n", errout.str()); checkConst("class Base {\n" "public:\n" " int a;\n" "};\n" "class Derived1 : public Base { };\n" "class Derived2 : public Derived1 {\n" "public:\n" " int get() {\n" " return a;\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:8]: (style, inconclusive) Technically the member function 'Derived2::get' can be const.\n", errout.str()); checkConst("class Base {\n" "public:\n" " int a;\n" "};\n" "class Derived1 : public Base { };\n" "class Derived2 : public Derived1 { };\n" "class Derived3 : public Derived2 { };\n" "class Derived4 : public Derived3 {\n" "public:\n" " int get() {\n" " return a;\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:10]: (style, inconclusive) Technically the member function 'Derived4::get' can be const.\n", errout.str()); // check for false positives checkConst("class Base {\n" "public:\n" " int a;\n" "};\n" "class Derived : public Base {\n" "public:\n" " int get() const {\n" " return a;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Base1 {\n" "public:\n" " int a;\n" "};\n" "class Base2 {\n" "public:\n" " int b;\n" "};\n" "class Derived : public Base1, public Base2 {\n" "public:\n" " int getA() const {\n" " return a;\n" " }\n" " int getB() const {\n" " return b;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Base {\n" "public:\n" " int a;\n" "};\n" "class Derived1 : public Base { };\n" "class Derived2 : public Derived1 {\n" "public:\n" " int get() const {\n" " return a;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Base {\n" "public:\n" " int a;\n" "};\n" "class Derived1 : public Base { };\n" "class Derived2 : public Derived1 { };\n" "class Derived3 : public Derived2 { };\n" "class Derived4 : public Derived3 {\n" "public:\n" " int get() const {\n" " return a;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const31() { checkConst("namespace std { }\n" "class Fred {\n" "public:\n" " int a;\n" " int get() { return a; }\n" "};"); ASSERT_EQUALS("[test.cpp:5]: (style, inconclusive) Technically the member function 'Fred::get' can be const.\n", errout.str()); } void const32() { checkConst("class Fred {\n" "public:\n" " std::string a[10];\n" " void seta() { a[0] = \"\"; }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const33() { checkConst("class derived : public base {\n" "public:\n" " void f(){}\n" "};"); ASSERT_EQUALS("", errout.str()); } void const34() { // ticket #1964 checkConst("class Bar {\n" " void init(Foo * foo) {\n" " foo.bar = this;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const35() { // ticket #2001 checkConst("namespace N\n" "{\n" " class Base\n" " {\n" " };\n" "}\n" "namespace N\n" "{\n" " class Derived : public Base\n" " {\n" " public:\n" " int getResourceName() { return var; }\n" " int var;\n" " };\n" "}"); ASSERT_EQUALS("[test.cpp:12]: (style, inconclusive) Technically the member function 'N::Derived::getResourceName' can be const.\n", errout.str()); checkConst("namespace N\n" "{\n" " class Base\n" " {\n" " public:\n" " int getResourceName();\n" " int var;\n" " };\n" "}\n" "int N::Base::getResourceName() { return var; }"); ASSERT_EQUALS("[test.cpp:10] -> [test.cpp:6]: (style, inconclusive) Technically the member function 'N::Base::getResourceName' can be const.\n", errout.str()); checkConst("namespace N\n" "{\n" " class Base\n" " {\n" " public:\n" " int getResourceName();\n" " int var;\n" " };\n" "}\n" "namespace N\n" "{\n" " int Base::getResourceName() { return var; }\n" "}"); ASSERT_EQUALS("[test.cpp:12] -> [test.cpp:6]: (style, inconclusive) Technically the member function 'N::Base::getResourceName' can be const.\n", errout.str()); checkConst("namespace N\n" "{\n" " class Base\n" " {\n" " public:\n" " int getResourceName();\n" " int var;\n" " };\n" "}\n" "using namespace N;\n" "int Base::getResourceName() { return var; }"); ASSERT_EQUALS("[test.cpp:11] -> [test.cpp:6]: (style, inconclusive) Technically the member function 'N::Base::getResourceName' can be const.\n", errout.str()); } void const36() { // ticket #2003 checkConst("class Foo {\n" "public:\n" " Blue::Utility::Size m_MaxQueueSize;\n" " void SetMaxQueueSize(Blue::Utility::Size a_MaxQueueSize)\n" " {\n" " m_MaxQueueSize = a_MaxQueueSize;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const37() { // ticket #2081 and #2085 checkConst("class A\n" "{\n" "public:\n" " A(){};\n" " std::string operator+(const char *c)\n" " {\n" " return m_str+std::string(c);\n" " }\n" "private:\n" " std::string m_str;\n" "};"); ASSERT_EQUALS("[test.cpp:5]: (style, inconclusive) Technically the member function 'A::operator+' can be const.\n", errout.str()); checkConst("class Fred\n" "{\n" "private:\n" " long x;\n" "public:\n" " Fred() {\n" " x = 0;\n" " }\n" " bool isValid() {\n" " return (x == 0x11224488);\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:9]: (style, inconclusive) Technically the member function 'Fred::isValid' can be const.\n", errout.str()); } void const38() { // ticket #2135 checkConst("class Foo {\n" "public:\n" " ~Foo() { delete oArq; }\n" " Foo(): oArq(new std::ofstream(\"...\")) {}\n" " void MyMethod();\n" "private:\n" " std::ofstream *oArq;\n" "};\n" "void Foo::MyMethod()\n" "{\n" " (*oArq) << \"\";\n" "}"); ASSERT_EQUALS("", errout.str()); } void const39() { checkConst("class Foo\n" "{\n" " int * p;\n" "public:\n" " Foo () : p(0) { }\n" " int * f();\n" " const int * f() const;\n" "};\n" "const int * Foo::f() const\n" "{\n" " return p;\n" "}\n" "int * Foo::f()\n" "{\n" " return p;\n" "}"); ASSERT_EQUALS("", errout.str()); } void const40() { // ticket #2228 checkConst("class SharedPtrHolder\n" "{\n" " private:\n" " std::tr1::shared_ptr pView;\n" " public:\n" " SharedPtrHolder()\n" " { }\n" " void SetView(const std::shared_ptr & aView)\n" " {\n" " pView = aView;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const41() { // ticket #2255 checkConst("class Fred\n" "{\n" " ::std::string m_name;\n" "public:\n" " void SetName(const ::std::string & name)\n" " {\n" " m_name = name;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class SharedPtrHolder\n" "{\n" " ::std::tr1::shared_ptr pNum;\n" " public :\n" " void SetNum(const ::std::tr1::shared_ptr & apNum)\n" " {\n" " pNum = apNum;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class SharedPtrHolder2\n" "{\n" " public:\n" " typedef ::std::tr1::shared_ptr IntSharedPtr;\n" " private:\n" " IntSharedPtr pNum;\n" " public :\n" " void SetNum(const IntSharedPtr & apNum)\n" " {\n" " pNum = apNum;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("struct IntPtrTypes\n" "{\n" " typedef ::std::tr1::shared_ptr Shared;\n" "};\n" "class SharedPtrHolder3\n" "{\n" " private:\n" " IntPtrTypes::Shared pNum;\n" " public :\n" " void SetNum(const IntPtrTypes::Shared & apNum)\n" " {\n" " pNum = apNum;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("template \n" "struct PtrTypes\n" "{\n" " typedef ::std::tr1::shared_ptr Shared;\n" "};\n" "class SharedPtrHolder4\n" "{\n" " private:\n" " PtrTypes::Shared pNum;\n" " public :\n" " void SetNum(const PtrTypes::Shared & apNum)\n" " {\n" " pNum = apNum;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const42() { // ticket #2282 checkConst("class Fred\n" "{\n" "public:\n" " struct AB { };\n" " bool f(AB * ab);\n" "};\n" "bool Fred::f(Fred::AB * ab)\n" "{\n" "}"); ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:5]: (performance, inconclusive) Technically the member function 'Fred::f' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("class Fred\n" "{\n" "public:\n" " struct AB {\n" " struct CD { };\n" " };\n" " bool f(AB::CD * cd);\n" "};\n" "bool Fred::f(Fred::AB::CD * cd)\n" "{\n" "}"); ASSERT_EQUALS("[test.cpp:9] -> [test.cpp:7]: (performance, inconclusive) Technically the member function 'Fred::f' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("namespace NS {\n" " class Fred\n" " {\n" " public:\n" " struct AB {\n" " struct CD { };\n" " };\n" " bool f(AB::CD * cd);\n" " };\n" " bool Fred::f(Fred::AB::CD * cd)\n" " {\n" " }\n" "}"); ASSERT_EQUALS("[test.cpp:10] -> [test.cpp:8]: (performance, inconclusive) Technically the member function 'NS::Fred::f' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("namespace NS {\n" " class Fred\n" " {\n" " public:\n" " struct AB {\n" " struct CD { };\n" " };\n" " bool f(AB::CD * cd);\n" " };\n" "}\n" "bool NS::Fred::f(NS::Fred::AB::CD * cd)\n" "{\n" "}"); ASSERT_EQUALS("[test.cpp:11] -> [test.cpp:8]: (performance, inconclusive) Technically the member function 'NS::Fred::f' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("class Foo {\n" " class Fred\n" " {\n" " public:\n" " struct AB {\n" " struct CD { };\n" " };\n" " bool f(AB::CD * cd);\n" " };\n" "};\n" "bool Foo::Fred::f(Foo::Fred::AB::CD * cd)\n" "{\n" "}"); ASSERT_EQUALS("[test.cpp:11] -> [test.cpp:8]: (performance, inconclusive) Technically the member function 'Foo::Fred::f' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); } void const43() { // ticket 2377 checkConst("class A\n" "{\n" "public:\n" " void foo( AA::BB::CC::DD b );\n" " AA::BB::CC::DD a;\n" "};\n" "void A::foo( AA::BB::CC::DD b )\n" "{\n" " a = b;\n" "}"); ASSERT_EQUALS("", errout.str()); checkConst("namespace AA\n" "{\n" " namespace BB\n" " {\n" " namespace CC\n" " {\n" " struct DD\n" " {};\n" " }\n" " }\n" "}\n" "class A\n" "{\n" " public:\n" "\n" " AA::BB::CC::DD a;\n" " void foo(AA::BB::CC::DD b)\n" " {\n" " a = b;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("namespace ZZ\n" "{\n" " namespace YY\n" " {\n" " struct XX\n" " {};\n" " }\n" "}\n" "class B\n" "{\n" " public:\n" " ZZ::YY::XX a;\n" " void foo(ZZ::YY::XX b)\n" " {\n" " a = b;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const44() { // ticket 2595 checkConst("class A\n" "{\n" "public:\n" " bool bOn;\n" " bool foo()\n" " {\n" " return 0 != (bOn = bOn);\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const45() { // ticket 2664 checkConst("namespace wraps {\n" " class BaseLayout {};\n" "}\n" "namespace tools {\n" " class WorkspaceControl :\n" " public wraps::BaseLayout\n" " {\n" " int toGrid(int _value)\n" " {\n" " }\n" " };\n" "}"); ASSERT_EQUALS("[test.cpp:8]: (performance, inconclusive) Technically the member function 'tools::WorkspaceControl::toGrid' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); } void const46() { // ticket 2663 checkConst("class Altren {\n" "public:\n" " int fun1() {\n" " int a;\n" " a++;\n" " }\n" " int fun2() {\n" " b++;\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Altren::fun1' can be static (but you may consider moving to unnamed namespace).\n" "[test.cpp:7]: (performance, inconclusive) Technically the member function 'Altren::fun2' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); } void const47() { // ticket 2670 checkConst("class Altren {\n" "public:\n" " void foo() { delete this; }\n" " void foo(int i) const { }\n" " void bar() { foo(); }\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (performance, inconclusive) Technically the member function 'Altren::foo' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("class Altren {\n" "public:\n" " void foo() { delete this; }\n" " void foo(int i) const { }\n" " void bar() { foo(1); }\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (performance, inconclusive) Technically the member function 'Altren::foo' can be static (but you may consider moving to unnamed namespace).\n" "[test.cpp:5]: (style, inconclusive) Technically the member function 'Altren::bar' can be const.\n", errout.str()); } void const48() { // ticket 2672 checkConst("class S0 {\n" " class S1 {\n" " class S2 {\n" " class S3 {\n" " class S4 { };\n" " };\n" " };\n" " };\n" "};\n" "class TextIterator {\n" " S0::S1::S2::S3::S4 mCurrent, mSave;\n" "public:\n" " bool setTagColour();\n" "};\n" "bool TextIterator::setTagColour() {\n" " mSave = mCurrent;\n" "}"); ASSERT_EQUALS("", errout.str()); } void const49() { // ticket 2795 checkConst("class A {\n" " private:\n" " std::map _hash;\n" " public:\n" " A() : _hash() {}\n" " unsigned int fetch(unsigned int key)\n" // cannot be 'const' " {\n" " return _hash[key];\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const50() { // ticket 2943 checkConst("class Altren\n" "{\n" " class SubClass : public std::vector\n" " {\n" " };\n" "};\n" "void _setAlign()\n" "{\n" " if (mTileSize.height > 0) return;\n" " if (mEmptyView) return;\n" "}"); ASSERT_EQUALS("", errout.str()); } void const51() { // ticket 3040 checkConst("class PSIPTable {\n" "public:\n" " PSIPTable() : _pesdata(0) { }\n" " const unsigned char* pesdata() const { return _pesdata; }\n" " unsigned char* pesdata() { return _pesdata; }\n" " void SetSection(uint num) { pesdata()[6] = num; }\n" "private:\n" " unsigned char *_pesdata;\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class PESPacket {\n" "public:\n" " PESPacket() : _pesdata(0) { }\n" " const unsigned char* pesdata() const { return _pesdata; }\n" " unsigned char* pesdata() { return _pesdata; }\n" "private:\n" " unsigned char *_pesdata;\n" "};\n" "class PSIPTable : public PESPacket\n" "{\n" "public:\n" " void SetSection(uint num) { pesdata()[6] = num; }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const52() { // ticket 3048 checkConst("class foo {\n" " void DoSomething(int &a) const { a = 1; }\n" " void DoSomethingElse() { DoSomething(bar); }\n" "private:\n" " int bar;\n" "};"); ASSERT_EQUALS("[test.cpp:2]: (performance, inconclusive) Technically the member function 'foo::DoSomething' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); } void const53() { // ticket 3049 checkConst("class A {\n" " public:\n" " A() : foo(false) {};\n" " virtual bool One(bool b = false) { foo = b; return false; }\n" " private:\n" " bool foo;\n" "};\n" "class B : public A {\n" " public:\n" " B() {};\n" " bool One(bool b = false) { return false; }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const54() { // ticket 3052 checkConst("class Example {\n" " public:\n" " void Clear(void) { Example tmp; (*this) = tmp; }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const55() { checkConst("class MyObject {\n" " int tmp;\n" " MyObject() : tmp(0) {}\n" "public:\n" " void set(std::stringstream &in) { in >> tmp; }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const56() { // ticket #3149 checkConst("class MyObject {\n" "public:\n" " void foo(int x) {\n" " switch (x) { }\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'MyObject::foo' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("class A\n" "{\n" " protected:\n" " unsigned short f (unsigned short X);\n" " public:\n" " A ();\n" "};\n" "\n" "unsigned short A::f (unsigned short X)\n" "{\n" " enum ERetValues {RET_NOK = 0, RET_OK = 1};\n" " enum ETypes {FLOAT_TYPE = 1, INT_TYPE = 2};\n" "\n" " try\n" " {\n" " switch (X)\n" " {\n" " case FLOAT_TYPE:\n" " {\n" " return RET_OK;\n" " }\n" " case INT_TYPE:\n" " {\n" " return RET_OK;\n" " }\n" " default:\n" " {\n" " return RET_NOK;\n" " }\n" " }\n" " }\n" " catch (...)\n" " {\n" " return RET_NOK;\n" " }\n" "\n" " return RET_NOK;\n" "}"); ASSERT_EQUALS("[test.cpp:9] -> [test.cpp:4]: (performance, inconclusive) Technically the member function 'A::f' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("class MyObject {\n" "public:\n" " void foo(int x) {\n" " for (int i = 0; i < 5; i++) { }\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'MyObject::foo' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); } void const57() { // tickets #2669 and #2477 checkConst("namespace MyGUI\n" "{\n" " namespace types\n" " {\n" " struct TSize {};\n" " struct TCoord {\n" " TSize size() const { }\n" " };\n" " }\n" " typedef types::TSize IntSize;\n" " typedef types::TCoord IntCoord;\n" "}\n" "class SelectorControl\n" "{\n" " MyGUI::IntSize getSize()\n" " {\n" " return mCoordValue.size();\n" " }\n" "private:\n" " MyGUI::IntCoord mCoordValue;\n" "};"); TODO_ASSERT_EQUALS("[test.cpp:7]: (performance, inconclusive) Technically the member function 'MyGUI::types::TCoord::size' can be static (but you may consider moving to unnamed namespace).\n" "[test.cpp:15]: (style, inconclusive) Technically the member function 'SelectorControl::getSize' can be const.\n", "[test.cpp:7]: (performance, inconclusive) Technically the member function 'MyGUI::types::TCoord::size' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("struct Foo {\n" " Bar b;\n" " void foo(Foo f) {\n" " b.run();\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("struct Bar {\n" " int i = 0;\n" " void run() { i++; }\n" "};\n" "struct Foo {\n" " Bar b;\n" " void foo(Foo f) {\n" " b.run();\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("struct Bar {\n" " void run() const { }\n" "};\n" "struct Foo {\n" " Bar b;\n" " void foo(Foo f) {\n" " b.run();\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:2]: (performance, inconclusive) Technically the member function 'Bar::run' can be static (but you may consider moving to unnamed namespace).\n" "[test.cpp:6]: (style, inconclusive) Technically the member function 'Foo::foo' can be const.\n", errout.str()); } void const58() { checkConst("struct MyObject {\n" " void foo(Foo f) {\n" " f.clear();\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:2]: (performance, inconclusive) Technically the member function 'MyObject::foo' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("struct MyObject {\n" " int foo(Foo f) {\n" " return f.length();\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:2]: (performance, inconclusive) Technically the member function 'MyObject::foo' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("struct MyObject {\n" " Foo f;\n" " int foo() {\n" " return f.length();\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("struct MyObject {\n" " std::string f;\n" " int foo() {\n" " return f.length();\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Technically the member function 'MyObject::foo' can be const.\n", errout.str()); } void const59() { // ticket #4646 checkConst("class C {\n" "public:\n" " inline void operator += (const int &x ) { re += x; }\n" " friend inline void exp(C & c, const C & x) { }\n" "protected:\n" " int re;\n" " int im;\n" "};"); ASSERT_EQUALS("", errout.str()); } void const60() { // ticket #3322 checkConst("class MyString {\n" "public:\n" " MyString() : m_ptr(0){}\n" " MyString& operator+=( const MyString& rhs ) {\n" " delete m_ptr;\n" " m_ptr = new char[42];\n" " }\n" " MyString append( const MyString& str )\n" " { return operator+=( str ); }\n" " char *m_ptr;\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class MyString {\n" "public:\n" " MyString() : m_ptr(0){}\n" " MyString& operator+=( const MyString& rhs );\n" " MyString append( const MyString& str )\n" " { return operator+=( str ); }\n" " char *m_ptr;\n" "};"); ASSERT_EQUALS("", errout.str()); } void const61() { // ticket #5606 - don't crash // this code is invalid so a false negative is OK checkConst("class MixerParticipant : public MixerParticipant {\n" " int GetAudioFrame();\n" "};\n" "int MixerParticipant::GetAudioFrame() {\n" " return 0;\n" "}"); // this code is invalid so a false negative is OK checkConst("class MixerParticipant : public MixerParticipant {\n" " bool InitializeFileReader() {\n" " printf(\"music\");\n" " }\n" "};"); // Based on an example from SVN source code causing an endless recursion within CheckClass::isConstMemberFunc() // A more complete example including a template declaration like // template class Hash{/* ... */}; // didn't . checkConst("template<>\n" "class Hash {\n" "protected:\n" " typedef Key::key_type key_type;\n" " void set(const Key& key);\n" "};\n" "template\n" "class Hash : private Hash {\n" " typedef Hash inherited;\n" " void set(const Key& key) {\n" " inherited::set(inherited::Key(key));\n" " }\n" "};\n", nullptr, false); ASSERT_EQUALS("", errout.str()); } void const62() { checkConst("class A {\n" " private:\n" " std::unordered_map _hash;\n" " public:\n" " A() : _hash() {}\n" " unsigned int fetch(unsigned int key)\n" // cannot be 'const' " {\n" " return _hash[key];\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const63() { checkConst("struct A {\n" " std::string s;\n" " void clear() {\n" " std::string* p = &s;\n" " p->clear();\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("struct A {\n" " std::string s;\n" " void clear() {\n" " std::string& r = s;\n" " r.clear();\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("struct A {\n" " std::string s;\n" " void clear() {\n" " std::string& r = sth; r = s;\n" " r.clear();\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Technically the member function 'A::clear' can be const.\n", errout.str()); checkConst("struct A {\n" " std::string s;\n" " void clear() {\n" " const std::string* p = &s;\n" " p->somefunction();\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Technically the member function 'A::clear' can be const.\n", errout.str()); checkConst("struct A {\n" " std::string s;\n" " void clear() {\n" " const std::string& r = s;\n" " r.somefunction();\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (style, inconclusive) Technically the member function 'A::clear' can be const.\n", errout.str()); } void const64() { checkConst("namespace B {\n" " namespace D {\n" " typedef int DKIPtr;\n" " }\n" " class ZClass {\n" " void set(const ::B::D::DKIPtr& p) {\n" " membervariable = p;\n" " }\n" " ::B::D::DKIPtr membervariable;\n" " };\n" "}"); ASSERT_EQUALS("", errout.str()); } void const65() { checkConst("template \n" "class TemplateClass {\n" "public:\n" " TemplateClass() { }\n" "};\n" "template <>\n" "class TemplateClass {\n" "public:\n" " TemplateClass() { }\n" "};\n" "int main() {\n" " TemplateClass a;\n" " TemplateClass b;\n" " return 0;\n" "}"); ASSERT_EQUALS("", errout.str()); } void const66() { checkConst("struct C {\n" " C() : n(0) {}\n" " void f(int v) { g((char *) &v); }\n" " void g(char *) { n++; }\n" " int n;\n" "};"); ASSERT_EQUALS("", errout.str()); } void const67() { // #9193 checkConst("template >\n" "class TestList {\n" "public:\n" " LIST_T m_list;\n" "};\n" "class Test {\n" "public:\n" " const std::list>& get() { return m_test.m_list; }\n" " TestList> m_test;\n" "};"); ASSERT_EQUALS("[test.cpp:8]: (style, inconclusive) Technically the member function 'Test::get' can be const.\n", errout.str()); } void const68() { // #6471 checkConst("class MyClass {\n" " void clear() {\n" " SVecPtr v = (SVecPtr) m_data;\n" " v->clear();\n" " }\n" " void* m_data;\n" "};\n"); ASSERT_EQUALS("", errout.str()); } void const69() { // #9806 checkConst("struct A {\n" " int a = 0;\n" " template void call(const Args &... args) { a = 1; }\n" " template auto call(const Args &... args) -> T {\n" " a = 2;\n" " return T{};\n" " }\n" "};\n" "\n" "struct B : public A {\n" " void test() {\n" " call();\n" " call(1, 2, 3);\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const70() { checkConst("struct A {\n" " template void call(Args ... args) {\n" " func(this);\n" " }\n" "\n" " void test() {\n" " call(1, 2);\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void const71() { // #10146 checkConst("struct Bar {\n" " int j = 5;\n" " void f(int& i) const { i += j; }\n" "};\n" "struct Foo {\n" " Bar bar;\n" " int k{};\n" " void g() { bar.f(k); }\n" "};\n"); ASSERT_EQUALS("", errout.str()); checkConst("struct S {\n" " A a;\n" " void f(int j, int*& p) {\n" " p = &(((a[j])));\n" " }\n" "};\n"); ASSERT_EQUALS("", errout.str()); } void const72() { // #10520 checkConst("struct S {\n" " explicit S(int* p) : mp(p) {}\n" " int* mp{};\n" "};\n" "struct C {\n" " int i{};\n" " S f() { return S{ &i }; }\n" "};\n"); ASSERT_EQUALS("", errout.str()); checkConst("struct S {\n" " explicit S(int* p) : mp(p) {}\n" " int* mp{};\n" "};\n" "struct C {\n" " int i{};\n" " S f() { return S(&i); }\n" "};\n"); ASSERT_EQUALS("", errout.str()); checkConst("struct S {\n" " int* mp{};\n" "};\n" "struct C {\n" " int i{};\n" " S f() { return S{ &i }; }\n" "};\n"); ASSERT_EQUALS("", errout.str()); checkConst("struct S {\n" " int* mp{};\n" "};\n" "struct C {\n" " int i{};\n" " S f() { return { &i }; }\n" "};\n"); ASSERT_EQUALS("", errout.str()); checkConst("struct S {\n" " explicit S(const int* p) : mp(p) {}\n" " const int* mp{};\n" "};\n" "struct C {\n" " int i{};\n" " S f() { return S{ &i }; }\n" "};\n"); TODO_ASSERT_EQUALS("[test.cpp:7]: (style, inconclusive) Technically the member function 'C::f' can be const.\n", "", errout.str()); checkConst("struct S {\n" " explicit S(const int* p) : mp(p) {}\n" " const int* mp{};\n" "};\n" "struct C {\n" " int i{};\n" " S f() { return S(&i); }\n" "};\n"); TODO_ASSERT_EQUALS("[test.cpp:7]: (style, inconclusive) Technically the member function 'C::f' can be const.\n", "", errout.str()); checkConst("struct S {\n" " const int* mp{};\n" "};\n" "struct C {\n" " int i{};\n" " S f() { return S{ &i }; }\n" "};\n"); TODO_ASSERT_EQUALS("[test.cpp:7]: (style, inconclusive) Technically the member function 'C::f' can be const.\n", "", errout.str()); checkConst("struct S {\n" " const int* mp{};\n" "};\n" "struct C {\n" " int i{};\n" " S f() { return { &i }; }\n" "};\n"); TODO_ASSERT_EQUALS("[test.cpp:7]: (style, inconclusive) Technically the member function 'C::f' can be const.\n", "", errout.str()); } void const73() { checkConst("struct A {\n" " int* operator[](int i);\n" " const int* operator[](int i) const;\n" "};\n" "struct S {\n" " A a;\n" " void f(int j) {\n" " int* p = a[j];\n" " *p = 0;\n" " }\n" "};\n"); ASSERT_EQUALS("", errout.str()); checkConst("struct S {\n" // #10758 " T* h;\n" " void f(); \n" "};\n" "void S::f() {\n" " char* c = h->x[y];\n" "};\n"); ASSERT_EQUALS("[test.cpp:5] -> [test.cpp:3]: (style, inconclusive) Technically the member function 'S::f' can be const.\n", errout.str()); } void const74() { // #10671 checkConst("class A {\n" " std::vector m_str;\n" "public:\n" " A() {}\n" " void bar(void) {\n" " for(std::vector::const_iterator it = m_str.begin(); it != m_str.end(); ++it) {;}\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:5]: (style, inconclusive) Technically the member function 'A::bar' can be const.\n", errout.str()); // Don't crash checkConst("struct S {\n" " std::vector v;\n" " void f() const;\n" "};\n" "void S::f() const {\n" " for (std::vector::const_iterator it = v.begin(), end = v.end(); it != end; ++it) {}\n" "}\n"); ASSERT_EQUALS("", errout.str()); } void const_handleDefaultParameters() { checkConst("struct Foo {\n" " void foo1(int i, int j = 0) {\n" " return func(this);\n" " }\n" " int bar1() {\n" " return foo1(1);\n" " }\n" " int bar2() {\n" " return foo1(1, 2);\n" " }\n" " int bar3() {\n" " return foo1(1, 2, 3);\n" " }\n" " int bar4() {\n" " return foo1();\n" " }\n" " void foo2(int i = 0) {\n" " return func(this);\n" " }\n" " int bar5() {\n" " return foo2();\n" " }\n" " void foo3() {\n" " return func(this);\n" " }\n" " int bar6() {\n" " return foo3();\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:11]: (performance, inconclusive) Technically the member function 'Foo::bar3' can be static (but you may consider moving to unnamed namespace).\n" "[test.cpp:14]: (performance, inconclusive) Technically the member function 'Foo::bar4' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); } void const_passThisToMemberOfOtherClass() { checkConst("struct Foo {\n" " void foo() {\n" " Bar b;\n" " b.takeFoo(this);\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("struct Foo {\n" " void foo() {\n" " Foo f;\n" " f.foo();\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:2]: (performance, inconclusive) Technically the member function 'Foo::foo' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("struct A;\n" // #5839 - operator() "struct B {\n" " void operator()(A *a);\n" "};\n" "struct A {\n" " void dostuff() {\n" " B()(this);\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void assigningPointerToPointerIsNotAConstOperation() { checkConst("struct s\n" "{\n" " int** v;\n" " void f()\n" " {\n" " v = 0;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void assigningArrayElementIsNotAConstOperation() { checkConst("struct s\n" "{\n" " ::std::string v[3];\n" " void f()\n" " {\n" " v[0] = \"Happy new year!\";\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } // increment/decrement => not const void constincdec() { checkConst("class Fred {\n" " int a;\n" " void nextA() { return ++a; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " int a;\n" " void nextA() { return --a; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " int a;\n" " void nextA() { return a++; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " int a;\n" " void nextA() { return a--; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("int a;\n" "class Fred {\n" " void nextA() { return ++a; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("int a;\n" "class Fred {\n" " void nextA() { return --a; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("int a;\n" "class Fred {\n" " void nextA() { return a++; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("int a;\n" "class Fred {\n" " void nextA() { return a--; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); } void constassign1() { checkConst("class Fred {\n" " int a;\n" " void nextA() { return a=1; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " int a;\n" " void nextA() { return a-=1; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " int a;\n" " void nextA() { return a+=1; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " int a;\n" " void nextA() { return a*=-1; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " int a;\n" " void nextA() { return a/=-2; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("int a;\n" "class Fred {\n" " void nextA() { return a=1; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("int a;\n" "class Fred {\n" " void nextA() { return a-=1; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("int a;\n" "class Fred {\n" " void nextA() { return a+=1; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("int a;\n" "class Fred {\n" " void nextA() { return a*=-1; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("int a;\n" "class Fred {\n" " void nextA() { return a/=-2; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); } void constassign2() { checkConst("class Fred {\n" " struct A { int a; } s;\n" " void nextA() { return s.a=1; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " struct A { int a; } s;\n" " void nextA() { return s.a-=1; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " struct A { int a; } s;\n" " void nextA() { return s.a+=1; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " struct A { int a; } s;\n" " void nextA() { return s.a*=-1; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("struct A { int a; } s;\n" "class Fred {\n" " void nextA() { return s.a=1; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("struct A { int a; } s;\n" "class Fred {\n" " void nextA() { return s.a-=1; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("struct A { int a; } s;\n" "class Fred {\n" " void nextA() { return s.a+=1; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("struct A { int a; } s;\n" "class Fred {\n" " void nextA() { return s.a*=-1; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("struct A { int a; } s;\n" "class Fred {\n" " void nextA() { return s.a/=-2; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("struct A { int a; };\n" "class Fred {\n" " A s;\n" " void nextA() { return s.a=1; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("struct A { int a; };\n" "class Fred {\n" " A s;\n" " void nextA() { return s.a-=1; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("struct A { int a; };\n" "class Fred {\n" " A s;\n" " void nextA() { return s.a+=1; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("struct A { int a; };\n" "class Fred {\n" " A s;\n" " void nextA() { return s.a*=-1; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("struct A { int a; };\n" "class Fred {\n" " A s;\n" " void nextA() { return s.a/=-2; }\n" "};"); ASSERT_EQUALS("", errout.str()); } // increment/decrement array element => not const void constincdecarray() { checkConst("class Fred {\n" " int a[2];\n" " void nextA() { return ++a[0]; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " int a[2];\n" " void nextA() { return --a[0]; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " int a[2];\n" " void nextA() { return a[0]++; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " int a[2];\n" " void nextA() { return a[0]--; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("int a[2];\n" "class Fred {\n" " void nextA() { return ++a[0]; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("int a[2];\n" "class Fred {\n" " void nextA() { return --a[0]; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("int a[2];\n" "class Fred {\n" " void nextA() { return a[0]++; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("int a[2];\n" "class Fred {\n" " void nextA() { return a[0]--; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); } void constassignarray() { checkConst("class Fred {\n" " int a[2];\n" " void nextA() { return a[0]=1; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " int a[2];\n" " void nextA() { return a[0]-=1; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " int a[2];\n" " void nextA() { return a[0]+=1; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " int a[2];\n" " void nextA() { return a[0]*=-1; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class Fred {\n" " int a[2];\n" " void nextA() { return a[0]/=-2; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("int a[2];\n" "class Fred {\n" " void nextA() { return a[0]=1; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("int a[2];\n" "class Fred {\n" " void nextA() { return a[0]-=1; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("int a[2];\n" "class Fred {\n" " void nextA() { return a[0]+=1; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("int a[2];\n" "class Fred {\n" " void nextA() { return a[0]*=-1; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst("int a[2];\n" "class Fred {\n" " void nextA() { return a[0]/=-2; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'Fred::nextA' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); } // return pointer/reference => not const void constReturnReference() { checkConst("class Fred {\n" " int a;\n" " int &getR() { return a; }\n" " int *getP() { return &a; }" "};"); ASSERT_EQUALS("", errout.str()); } // delete member variable => not const (but technically it can, it compiles without errors) void constDelete() { checkConst("class Fred {\n" " int *a;\n" " void clean() { delete a; }\n" "};"); ASSERT_EQUALS("", errout.str()); } // A function that returns unknown types can't be const (#1579) void constLPVOID() { checkConst("class Fred {\n" " UNKNOWN a() { return 0; };\n" "};"); TODO_ASSERT_EQUALS("[test.cpp:2]: (performance, inconclusive) Technically the member function 'Fred::a' can be static.\n", "", errout.str()); // #1579 - HDC checkConst("class Fred {\n" " foo bar;\n" " UNKNOWN a() { return b; };\n" "};"); ASSERT_EQUALS("", errout.str()); } // a function that calls const functions can be const void constFunc() { checkConst("class Fred {\n" " void f() const { };\n" " void a() { f(); };\n" "};"); ASSERT_EQUALS("[test.cpp:2]: (performance, inconclusive) Technically the member function 'Fred::f' can be static (but you may consider moving to unnamed namespace).\n" "[test.cpp:3]: (style, inconclusive) Technically the member function 'Fred::a' can be const.\n", errout.str()); // ticket #1593 checkConst("class A\n" "{\n" " std::vector m_v;\n" "public:\n" " A(){}\n" " unsigned int GetVecSize() {return m_v.size();}\n" "};"); ASSERT_EQUALS("[test.cpp:6]: (style, inconclusive) Technically the member function 'A::GetVecSize' can be const.\n", errout.str()); checkConst("class A\n" "{\n" " std::vector m_v;\n" "public:\n" " A(){}\n" " bool GetVecEmpty() {return m_v.empty();}\n" "};"); ASSERT_EQUALS("[test.cpp:6]: (style, inconclusive) Technically the member function 'A::GetVecEmpty' can be const.\n", errout.str()); } void constVirtualFunc() { // base class has no virtual function checkConst("class A { };\n" "class B : public A {\n" " int b;\n" "public:\n" " B() : b(0) { }\n" " int func() { return b; }\n" "};"); ASSERT_EQUALS("[test.cpp:6]: (style, inconclusive) Technically the member function 'B::func' can be const.\n", errout.str()); checkConst("class A { };\n" "class B : public A {\n" " int b;\n" "public:\n" " B() : b(0) { }\n" " int func();\n" "};\n" "int B::func() { return b; }"); ASSERT_EQUALS("[test.cpp:8] -> [test.cpp:6]: (style, inconclusive) Technically the member function 'B::func' can be const.\n", errout.str()); // base class has no virtual function checkConst("class A {\n" "public:\n" " int func();\n" "};\n" "class B : public A {\n" " int b;\n" "public:\n" " B() : b(0) { }\n" " int func() { return b; }\n" "};"); ASSERT_EQUALS("[test.cpp:9]: (style, inconclusive) Technically the member function 'B::func' can be const.\n", errout.str()); checkConst("class A {\n" "public:\n" " int func();\n" "};\n" "class B : public A {\n" " int b;\n" "public:\n" " B() : b(0) { }\n" " int func();\n" "};\n" "int B::func() { return b; }"); ASSERT_EQUALS("[test.cpp:11] -> [test.cpp:9]: (style, inconclusive) Technically the member function 'B::func' can be const.\n", errout.str()); // base class has virtual function checkConst("class A {\n" "public:\n" " virtual int func();\n" "};\n" "class B : public A {\n" " int b;\n" "public:\n" " B() : b(0) { }\n" " int func() { return b; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class A {\n" "public:\n" " virtual int func();\n" "};\n" "class B : public A {\n" " int b;\n" "public:\n" " B() : b(0) { }\n" " int func();\n" "};\n" "int B::func() { return b; }"); ASSERT_EQUALS("", errout.str()); checkConst("class A {\n" "public:\n" " virtual int func() = 0;\n" "};\n" "class B : public A {\n" " int b;\n" "public:\n" " B() : b(0) { }\n" " int func();\n" "};\n" "int B::func() { return b; }"); ASSERT_EQUALS("", errout.str()); // base class has no virtual function checkConst("class A {\n" " int a;\n" "public:\n" " A() : a(0) { }\n" " int func() { return a; }\n" "};\n" "class B : public A {\n" " int b;\n" "public:\n" " B() : b(0) { }\n" " int func() { return b; }\n" "};\n" "class C : public B {\n" " int c;\n" "public:\n" " C() : c(0) { }\n" " int func() { return c; }\n" "};"); ASSERT_EQUALS("[test.cpp:5]: (style, inconclusive) Technically the member function 'A::func' can be const.\n" "[test.cpp:11]: (style, inconclusive) Technically the member function 'B::func' can be const.\n" "[test.cpp:17]: (style, inconclusive) Technically the member function 'C::func' can be const.\n", errout.str()); checkConst("class A {\n" " int a;\n" "public:\n" " A() : a(0) { }\n" " int func();\n" "};\n" "int A::func() { return a; }\n" "class B : public A {\n" " int b;\n" "public:\n" " B() : b(0) { }\n" " int func();\n" "};\n" "int B::func() { return b; }\n" "class C : public B {\n" " int c;\n" "public:\n" " C() : c(0) { }\n" " int func();\n" "};\n" "int C::func() { return c; }"); ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:5]: (style, inconclusive) Technically the member function 'A::func' can be const.\n" "[test.cpp:14] -> [test.cpp:12]: (style, inconclusive) Technically the member function 'B::func' can be const.\n" "[test.cpp:21] -> [test.cpp:19]: (style, inconclusive) Technically the member function 'C::func' can be const.\n", errout.str()); // base class has virtual function checkConst("class A {\n" " int a;\n" "public:\n" " A() : a(0) { }\n" " virtual int func() { return a; }\n" "};\n" "class B : public A {\n" " int b;\n" "public:\n" " B() : b(0) { }\n" " int func() { return b; }\n" "};\n" "class C : public B {\n" " int c;\n" "public:\n" " C() : c(0) { }\n" " int func() { return c; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkConst("class A {\n" " int a;\n" "public:\n" " A() : a(0) { }\n" " virtual int func();\n" "};\n" "int A::func() { return a; }\n" "class B : public A {\n" " int b;\n" "public:\n" " B() : b(0) { }\n" " int func();\n" "};\n" "int B::func() { return b; }\n" "class C : public B {\n" " int c;\n" "public:\n" " C() : c(0) { }\n" " int func();\n" "};\n" "int C::func() { return c; }"); ASSERT_EQUALS("", errout.str()); // ticket #1311 checkConst("class X {\n" " int x;\n" "public:\n" " X(int x) : x(x) { }\n" " int getX() { return x; }\n" "};\n" "class Y : public X {\n" " int y;\n" "public:\n" " Y(int x, int y) : X(x), y(y) { }\n" " int getY() { return y; }\n" "};\n" "class Z : public Y {\n" " int z;\n" "public:\n" " Z(int x, int y, int z) : Y(x, y), z(z) { }\n" " int getZ() { return z; }\n" "};"); ASSERT_EQUALS("[test.cpp:5]: (style, inconclusive) Technically the member function 'X::getX' can be const.\n" "[test.cpp:11]: (style, inconclusive) Technically the member function 'Y::getY' can be const.\n" "[test.cpp:17]: (style, inconclusive) Technically the member function 'Z::getZ' can be const.\n", errout.str()); checkConst("class X {\n" " int x;\n" "public:\n" " X(int x) : x(x) { }\n" " int getX();\n" "};\n" "int X::getX() { return x; }\n" "class Y : public X {\n" " int y;\n" "public:\n" " Y(int x, int y) : X(x), y(y) { }\n" " int getY();\n" "};\n" "int Y::getY() { return y; }\n" "class Z : public Y {\n" " int z;\n" "public:\n" " Z(int x, int y, int z) : Y(x, y), z(z) { }\n" " int getZ();\n" "};\n" "int Z::getZ() { return z; }"); ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:5]: (style, inconclusive) Technically the member function 'X::getX' can be const.\n" "[test.cpp:14] -> [test.cpp:12]: (style, inconclusive) Technically the member function 'Y::getY' can be const.\n" "[test.cpp:21] -> [test.cpp:19]: (style, inconclusive) Technically the member function 'Z::getZ' can be const.\n", errout.str()); } void constIfCfg() { const char code[] = "struct foo {\n" " int i;\n" " void f() {\n" //"#ifdef ABC\n" //" i = 4;\n" //"endif\n" " }\n" "};"; checkConst(code, &settings0, true); ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'foo::f' can be static (but you may consider moving to unnamed namespace).\n", errout.str()); checkConst(code, &settings0, false); // TODO: Set inconclusive to true (preprocess it) ASSERT_EQUALS("", errout.str()); } void constFriend() { // ticket #1921 const char code[] = "class foo {\n" " friend void f() { }\n" "};"; checkConst(code); ASSERT_EQUALS("", errout.str()); } void constUnion() { // ticket #2111 checkConst("class foo {\n" "public:\n" " union {\n" " int i;\n" " float f;\n" " } d;\n" " void setf(float x) {\n" " d.f = x;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); } void constArrayOperator() { checkConst("struct foo {\n" " int x;\n" " int y[5][724];\n" " T a() {\n" " return y[x++][6];\n" " }\n" " T b() {\n" " return y[1][++x];\n" " }\n" " T c() {\n" " return y[1][6];\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:10]: (style, inconclusive) Technically the member function 'foo::c' can be const.\n", errout.str()); } void constRangeBasedFor() { // #5514 checkConst("class Fred {\n" " int array[256];\n" "public:\n" " void f1() {\n" " for (auto & e : array)\n" " foo(e);\n" " }\n" " void f2() {\n" " for (const auto & e : array)\n" " foo(e);\n" " }\n" " void f3() {\n" " for (decltype(auto) e : array)\n" " foo(e);\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:8]: (style, inconclusive) Technically the member function 'Fred::f2' can be const.\n", errout.str()); } void const_shared_ptr() { // #8674 checkConst("class Fred {\n" "public:\n" " std::shared_ptr getData();\n" "private:\n" " std::shared_ptr data;\n" "};\n" "\n" "std::shared_ptr Fred::getData() { return data; }"); ASSERT_EQUALS("", errout.str()); } void constPtrToConstPtr() { checkConst("class Fred {\n" "public:\n" " const char *const *data;\n" " const char *const *getData() { return data; }\n}"); ASSERT_EQUALS("[test.cpp:4]: (style, inconclusive) Technically the member function 'Fred::getData' can be const.\n", errout.str()); } void constTrailingReturnType() { // #9814 checkConst("struct A {\n" " int x = 1;\n" " auto get() -> int & { return x; }\n" "};"); ASSERT_EQUALS("", errout.str()); } void staticArrayPtrOverload() { checkConst("struct S {\n" " template\n" " void f(const std::array& sv);\n" " template\n" " void f(const char* const (&StrArr)[N]);\n" "};\n" "template\n" "void S::f(const std::array& sv) {\n" " const char* ptrs[N]{};\n" " return f(ptrs);\n" "}\n" "template void S::f(const std::array& sv);\n"); ASSERT_EQUALS("", errout.str()); } #define checkInitializerListOrder(code) checkInitializerListOrder_(code, __FILE__, __LINE__) void checkInitializerListOrder_(const char code[], const char* file, int line) { // Clear the error log errout.str(""); // Check.. settings0.certainty.setEnabled(Certainty::inconclusive, true); // Tokenize.. Tokenizer tokenizer(&settings0, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); CheckClass checkClass(&tokenizer, &settings0, this); checkClass.initializerListOrder(); } void initializerListOrder() { checkInitializerListOrder("class Fred {\n" " int a, b, c;\n" "public:\n" " Fred() : c(0), b(0), a(0) { }\n" "};"); ASSERT_EQUALS("[test.cpp:4] -> [test.cpp:2]: (style, inconclusive) Member variable 'Fred::b' is in the wrong place in the initializer list.\n" "[test.cpp:4] -> [test.cpp:2]: (style, inconclusive) Member variable 'Fred::a' is in the wrong place in the initializer list.\n", errout.str()); checkInitializerListOrder("class Fred {\n" " int a, b, c;\n" "public:\n" " Fred() : c{0}, b{0}, a{0} { }\n" "};"); ASSERT_EQUALS("[test.cpp:4] -> [test.cpp:2]: (style, inconclusive) Member variable 'Fred::b' is in the wrong place in the initializer list.\n" "[test.cpp:4] -> [test.cpp:2]: (style, inconclusive) Member variable 'Fred::a' is in the wrong place in the initializer list.\n", errout.str()); } #define checkInitializationListUsage(code) checkInitializationListUsage_(code, __FILE__, __LINE__) void checkInitializationListUsage_(const char code[], const char* file, int line) { // Clear the error log errout.str(""); // Check.. Settings settings; settings.severity.enable(Severity::performance); // Tokenize.. Tokenizer tokenizer(&settings, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); CheckClass checkClass(&tokenizer, &settings, this); checkClass.initializationListUsage(); } void initializerListUsage() { checkInitializationListUsage("enum Enum { C = 0 };\n" "class Fred {\n" " int a;\n" // No message for builtin types: No performance gain " int* b;\n" // No message for pointers: No performance gain " Enum c;\n" // No message for enums: No performance gain " Fred() { a = 0; b = 0; c = C; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkInitializationListUsage("class Fred {\n" " std::string s;\n" " Fred() { a = 0; s = \"foo\"; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance) Variable 's' is assigned in constructor body. Consider performing initialization in initialization list.\n", errout.str()); checkInitializationListUsage("class Fred {\n" " std::string& s;\n" // Message is invalid for references, since their initialization in initializer list is required anyway and behaves different from assignment (#5004) " Fred(const std::string& s_) : s(s_) { s = \"foo\"; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkInitializationListUsage("class Fred {\n" " std::vector v;\n" " Fred() { v = unknown; }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance) Variable 'v' is assigned in constructor body. Consider performing initialization in initialization list.\n", errout.str()); checkInitializationListUsage("class C { std::string s; };\n" "class Fred {\n" " C c;\n" " Fred() { c = unknown; }\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (performance) Variable 'c' is assigned in constructor body. Consider performing initialization in initialization list.\n", errout.str()); checkInitializationListUsage("class C;\n" "class Fred {\n" " C c;\n" " Fred() { c = unknown; }\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (performance) Variable 'c' is assigned in constructor body. Consider performing initialization in initialization list.\n", errout.str()); checkInitializationListUsage("class C;\n" "class Fred {\n" " C c;\n" " Fred(Fred const & other) { c = other.c; }\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (performance) Variable 'c' is assigned in constructor body. Consider performing initialization in initialization list.\n", errout.str()); checkInitializationListUsage("class C;\n" "class Fred {\n" " C c;\n" " Fred(Fred && other) { c = other.c; }\n" "};"); ASSERT_EQUALS("[test.cpp:4]: (performance) Variable 'c' is assigned in constructor body. Consider performing initialization in initialization list.\n", errout.str()); checkInitializationListUsage("class C;\n" "class Fred {\n" " C a;\n" " Fred() { initB(); a = b; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkInitializationListUsage("class C;\n" "class Fred {\n" " C a;\n" " Fred() : a(0) { if(b) a = 0; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkInitializationListUsage("class C;\n" "class Fred {\n" " C a[5];\n" " Fred() { for(int i = 0; i < 5; i++) a[i] = 0; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkInitializationListUsage("class C;\n" "class Fred {\n" " C a; int b;\n" " Fred() : b(5) { a = b; }\n" // Don't issue a message here: You actually could move it to the initialization list, but it would cause problems if you change the order of the variable declarations. "};"); ASSERT_EQUALS("", errout.str()); checkInitializationListUsage("class C;\n" "class Fred {\n" " C a;\n" " Fred() { try { a = new int; } catch(...) {} }\n" "};"); ASSERT_EQUALS("", errout.str()); checkInitializationListUsage("class Fred {\n" " std::string s;\n" " Fred() { s = toString((size_t)this); }\n" "};"); ASSERT_EQUALS("", errout.str()); checkInitializationListUsage("class Fred {\n" " std::string a;\n" " std::string foo();\n" " Fred() { a = foo(); }\n" "};"); ASSERT_EQUALS("", errout.str()); checkInitializationListUsage("class Fred {\n" " std::string a;\n" " Fred() { a = foo(); }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (performance) Variable 'a' is assigned in constructor body. Consider performing initialization in initialization list.\n", errout.str()); checkInitializationListUsage("class Fred {\n" // #4332 " static std::string s;\n" " Fred() { s = \"foo\"; }\n" "};"); ASSERT_EQUALS("", errout.str()); checkInitializationListUsage("class Fred {\n" // #5640 " std::string s;\n" " Fred() {\n" " char str[2];\n" " str[0] = c;\n" " str[1] = 0;\n" " s = str;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkInitializationListUsage("class B {\n" // #5640 " std::shared_ptr _d;\n" " B(const B& other) : _d(std::make_shared ()) {\n" " *_d = *other._d;\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkInitializationListUsage("class Bar {\n" // #8466 "public:\n" " explicit Bar(const Bar &bar) : Bar{bar.s} {}\n" " explicit Bar(const char s) : s{s} {}\n" "private:\n" " char s;\n" "};"); ASSERT_EQUALS("", errout.str()); checkInitializationListUsage("unsigned bar(std::string);\n" // #8291 "class Foo {\n" "public:\n" " int a_, b_;\n" " Foo(int a, int b) : a_(a), b_(b) {}\n" " Foo(int a, const std::string& b) : Foo(a, bar(b)) {}\n" "};"); ASSERT_EQUALS("", errout.str()); checkInitializationListUsage("class Fred {\n" // #8111 " std::string a;\n" " Fred() {\n" " std::ostringstream ostr;\n" " ostr << x;\n" " a = ostr.str();\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); // bailout: multi line lambda in rhs => do not warn checkInitializationListUsage("class Fred {\n" " std::function f;\n" " Fred() {\n" " f = [](){\n" " return 1;\n" " };\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); // don't warn if some other instance's members are assigned to checkInitializationListUsage("class C {\n" "public:\n" " C(C& c) : m_i(c.m_i) { c.m_i = (Foo)-1; }\n" "private:\n" " Foo m_i;\n" "};"); ASSERT_EQUALS("", errout.str()); checkInitializationListUsage("class A {\n" // #9821 - delegate constructor "public:\n" " A() : st{} {}\n" "\n" " explicit A(const std::string &input): A() {\n" " st = input;\n" " }\n" "\n" "private:\n" " std::string st;\n" "};"); ASSERT_EQUALS("", errout.str()); } #define checkSelfInitialization(code) checkSelfInitialization_(code, __FILE__, __LINE__) void checkSelfInitialization_(const char code[], const char* file, int line) { // Clear the error log errout.str(""); // Tokenize.. Tokenizer tokenizer(&settings0, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); CheckClass checkClass(&tokenizer, &settings0, this); (checkClass.checkSelfInitialization)(); } void selfInitialization() { checkSelfInitialization("class Fred {\n" " int i;\n" " Fred() : i(i) {\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (error) Member variable 'i' is initialized by itself.\n", errout.str()); checkSelfInitialization("class Fred {\n" " int i;\n" " Fred() : i{i} {\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (error) Member variable 'i' is initialized by itself.\n", errout.str()); checkSelfInitialization("class Fred {\n" " int i;\n" " Fred();\n" "};\n" "Fred::Fred() : i(i) {\n" "}"); ASSERT_EQUALS("[test.cpp:5]: (error) Member variable 'i' is initialized by itself.\n", errout.str()); checkSelfInitialization("class Fred {\n" " std::string s;\n" " Fred() : s(s) {\n" " }\n" "};"); ASSERT_EQUALS("[test.cpp:3]: (error) Member variable 's' is initialized by itself.\n", errout.str()); checkSelfInitialization("class Fred {\n" " int x;\n" " Fred(int x);\n" "};\n" "Fred::Fred(int x) : x(x) { }"); ASSERT_EQUALS("", errout.str()); checkSelfInitialization("class Fred {\n" " int x;\n" " Fred(int x);\n" "};\n" "Fred::Fred(int x) : x{x} { }"); ASSERT_EQUALS("", errout.str()); checkSelfInitialization("class Fred {\n" " std::string s;\n" " Fred(const std::string& s) : s(s) {\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkSelfInitialization("class Fred {\n" " std::string s;\n" " Fred(const std::string& s) : s{s} {\n" " }\n" "};"); ASSERT_EQUALS("", errout.str()); checkSelfInitialization("struct Foo : Bar {\n" " int i;\n" " Foo(int i)\n" " : Bar(\"\"), i(i) {}\n" "};"); ASSERT_EQUALS("", errout.str()); checkSelfInitialization("struct Foo : std::Bar {\n" // #6073 " int i;\n" " Foo(int i)\n" " : std::Bar(\"\"), i(i) {}\n" "};"); ASSERT_EQUALS("", errout.str()); checkSelfInitialization("struct Foo : std::Bar {\n" // #6073 " int i;\n" " Foo(int i)\n" " : std::Bar(\"\"), i{i} {}\n" "};"); ASSERT_EQUALS("", errout.str()); } #define checkVirtualFunctionCall(...) checkVirtualFunctionCall_(__FILE__, __LINE__, __VA_ARGS__) void checkVirtualFunctionCall_(const char* file, int line, const char code[], Settings *s = nullptr, bool inconclusive = true) { // Clear the error log errout.str(""); // Check.. if (!s) { static Settings settings_; s = &settings_; s->severity.enable(Severity::warning); } s->certainty.setEnabled(Certainty::inconclusive, inconclusive); // Tokenize.. Tokenizer tokenizer(s, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); CheckClass checkClass(&tokenizer, s, this); checkClass.checkVirtualFunctionCallInConstructor(); } void virtualFunctionCallInConstructor() { checkVirtualFunctionCall("class A\n" "{\n" " virtual int f() { return 1; }\n" " A();\n" "};\n" "A::A()\n" "{f();}"); ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:3]: (style) Virtual function 'f' is called from constructor 'A()' at line 7. Dynamic binding is not used.\n", errout.str()); checkVirtualFunctionCall("class A {\n" " virtual int f();\n" " A() {f();}\n" "};\n" "int A::f() { return 1; }"); ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:2]: (style) Virtual function 'f' is called from constructor 'A()' at line 3. Dynamic binding is not used.\n", errout.str()); checkVirtualFunctionCall("class A : B {\n" " int f() override;\n" " A() {f();}\n" "};\n" "int A::f() { return 1; }"); ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:2]: (style) Virtual function 'f' is called from constructor 'A()' at line 3. Dynamic binding is not used.\n", errout.str()); checkVirtualFunctionCall("class B {\n" " virtual int f() = 0;\n" "};\n" "class A : B {\n" " int f();\n" // <- not explicitly virtual " A() {f();}\n" "};\n" "int A::f() { return 1; }"); ASSERT_EQUALS("", errout.str()); checkVirtualFunctionCall("class A\n" "{\n" " A() { A::f(); }\n" " virtual void f() {}\n" "};"); ASSERT_EQUALS("", errout.str()); checkVirtualFunctionCall("class A : B {\n" " int f() final { return 1; }\n" " A() { f(); }\n" "};\n"); ASSERT_EQUALS("", errout.str()); checkVirtualFunctionCall("class B {\n" "public:" " virtual void f() {}\n" "};\n" "class A : B {\n" "public:" " void f() override final {}\n" " A() { f(); }\n" "};\n"); ASSERT_EQUALS("", errout.str()); } void pureVirtualFunctionCall() { checkVirtualFunctionCall("class A\n" "{\n" " virtual void pure()=0;\n" " A();\n" "};\n" "A::A()\n" "{pure();}"); ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:3]: (warning) Call of pure virtual function 'pure' in constructor.\n", errout.str()); checkVirtualFunctionCall("class A\n" "{\n" " virtual int pure()=0;\n" " A();\n" " int m;\n" "};\n" "A::A():m(A::pure())\n" "{}"); ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:3]: (warning) Call of pure virtual function 'pure' in constructor.\n", errout.str()); checkVirtualFunctionCall("class A\n" " {\n" " virtual void pure()=0;\n" " virtual ~A();\n" " int m;\n" "};\n" "A::~A()\n" "{pure();}"); ASSERT_EQUALS("[test.cpp:8] -> [test.cpp:3]: (warning) Call of pure virtual function 'pure' in destructor.\n", errout.str()); checkVirtualFunctionCall("class A\n" " {\n" " virtual void pure()=0;\n" " void nonpure()\n" " {pure();}\n" " A();\n" "};\n" "A::A()\n" "{nonpure();}"); ASSERT_EQUALS("[test.cpp:9] -> [test.cpp:5] -> [test.cpp:3]: (warning) Call of pure virtual function 'pure' in constructor.\n", errout.str()); checkVirtualFunctionCall("class A\n" " {\n" " virtual int pure()=0;\n" " int nonpure()\n" " {return pure();}\n" " A();\n" " int m;\n" "};\n" "A::A():m(nonpure())\n" "{}"); TODO_ASSERT_EQUALS("[test.cpp:9] -> [test.cpp:5] -> [test.cpp:3]: (warning) Call of pure virtual function 'pure' in constructor.\n", "", errout.str()); checkVirtualFunctionCall("class A\n" " {\n" " virtual void pure()=0;\n" " void nonpure()\n" " {pure();}\n" " virtual ~A();\n" " int m;\n" "};\n" "A::~A()\n" "{nonpure();}"); ASSERT_EQUALS("[test.cpp:10] -> [test.cpp:5] -> [test.cpp:3]: (warning) Call of pure virtual function 'pure' in destructor.\n", errout.str()); checkVirtualFunctionCall("class A\n" "{\n" " virtual void pure()=0;\n" " A(bool b);\n" "};\n" "A::A(bool b)\n" "{if (b) pure();}"); ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:3]: (warning) Call of pure virtual function 'pure' in constructor.\n", errout.str()); checkVirtualFunctionCall("class A\n" "{\n" " virtual void pure()=0;\n" " virtual ~A();\n" " int m;\n" "};\n" "A::~A()\n" "{if (b) pure();}"); ASSERT_EQUALS("[test.cpp:8] -> [test.cpp:3]: (warning) Call of pure virtual function 'pure' in destructor.\n", errout.str()); // #5831 checkVirtualFunctionCall("class abc {\n" "public:\n" " virtual ~abc() throw() {}\n" " virtual void def(void* g) throw () = 0;\n" "};"); ASSERT_EQUALS("", errout.str()); // #4992 checkVirtualFunctionCall("class CMyClass {\n" " std::function< void(void) > m_callback;\n" "public:\n" " CMyClass() {\n" " m_callback = [this]() { return VirtualMethod(); };\n" " }\n" " virtual void VirtualMethod() = 0;\n" "};"); ASSERT_EQUALS("", errout.str()); } void pureVirtualFunctionCallOtherClass() { checkVirtualFunctionCall("class A\n" "{\n" " virtual void pure()=0;\n" " A(const A & a);\n" "};\n" "A::A(const A & a)\n" "{a.pure();}"); ASSERT_EQUALS("", errout.str()); checkVirtualFunctionCall("class A\n" "{\n" " virtual void pure()=0;\n" " A();\n" "};\n" "class B\n" "{\n" " virtual void pure()=0;\n" "};\n" "A::A()\n" "{B b; b.pure();}"); ASSERT_EQUALS("", errout.str()); } void pureVirtualFunctionCallWithBody() { checkVirtualFunctionCall("class A\n" "{\n" " virtual void pureWithBody()=0;\n" " A();\n" "};\n" "A::A()\n" "{pureWithBody();}\n" "void A::pureWithBody()\n" "{}"); ASSERT_EQUALS("", errout.str()); checkVirtualFunctionCall("class A\n" " {\n" " virtual void pureWithBody()=0;\n" " void nonpure()\n" " {pureWithBody();}\n" " A();\n" "};\n" "A::A()\n" "{nonpure();}\n" "void A::pureWithBody()\n" "{}"); ASSERT_EQUALS("", errout.str()); } void pureVirtualFunctionCallPrevented() { checkVirtualFunctionCall("class A\n" " {\n" " virtual void pure()=0;\n" " void nonpure(bool bCallPure)\n" " { if (bCallPure) pure();}\n" " A();\n" "};\n" "A::A()\n" "{nonpure(false);}"); ASSERT_EQUALS("", errout.str()); checkVirtualFunctionCall("class A\n" " {\n" " virtual void pure()=0;\n" " void nonpure(bool bCallPure)\n" " { if (!bCallPure) ; else pure();}\n" " A();\n" "};\n" "A::A()\n" "{nonpure(false);}"); ASSERT_EQUALS("", errout.str()); checkVirtualFunctionCall("class A\n" " {\n" " virtual void pure()=0;\n" " void nonpure(bool bCallPure)\n" " {\n" " switch (bCallPure) {\n" " case true: pure(); break;\n" " }\n" " }\n" " A();\n" "};\n" "A::A()\n" "{nonpure(false);}"); ASSERT_EQUALS("", errout.str()); } #define checkOverride(code) checkOverride_(code, __FILE__, __LINE__) void checkOverride_(const char code[], const char* file, int line) { // Clear the error log errout.str(""); Settings settings; settings.severity.enable(Severity::style); // Tokenize.. Tokenizer tokenizer(&settings, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); // Check.. CheckClass checkClass(&tokenizer, &settings, this); (checkClass.checkOverride)(); } void override1() { checkOverride("class Base { virtual void f(); };\n" "class Derived : Base { virtual void f(); };"); ASSERT_EQUALS("[test.cpp:1] -> [test.cpp:2]: (style) The function 'f' overrides a function in a base class but is not marked with a 'override' specifier.\n", errout.str()); checkOverride("class Base { virtual void f(); };\n" "class Derived : Base { virtual void f() override; };"); ASSERT_EQUALS("", errout.str()); checkOverride("class Base { virtual void f(); };\n" "class Derived : Base { virtual void f() final; };"); ASSERT_EQUALS("", errout.str()); checkOverride("class Base {\n" "public:\n" " virtual auto foo( ) const -> size_t { return 1; }\n" " virtual auto bar( ) const -> size_t { return 1; }\n" "};\n" "class Derived : public Base {\n" "public :\n" " auto foo( ) const -> size_t { return 0; }\n" " auto bar( ) const -> size_t override { return 0; }\n" "};"); ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:8]: (style) The function 'foo' overrides a function in a base class but is not marked with a 'override' specifier.\n", errout.str()); checkOverride("namespace Test {\n" " class C {\n" " public:\n" " virtual ~C();\n" " };\n" "}\n" "class C : Test::C {\n" "public:\n" " ~C();\n" "};"); ASSERT_EQUALS("[test.cpp:4] -> [test.cpp:9]: (style) The destructor '~C' overrides a destructor in a base class but is not marked with a 'override' specifier.\n", errout.str()); checkOverride("struct Base {\n" " virtual void foo();\n" "};\n" "\n" "struct Derived: public Base {\n" " void foo() override;\n" " void foo(int);\n" "};"); ASSERT_EQUALS("", errout.str()); checkOverride("struct B {\n" // #9092 " virtual int f(int i) const = 0;\n" "};\n" "namespace N {\n" " struct D : B {\n" " virtual int f(int i) const;\n" " };\n" "}\n"); ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:6]: (style) The function 'f' overrides a function in a base class but is not marked with a 'override' specifier.\n", errout.str()); } void overrideCVRefQualifiers() { checkOverride("class Base { virtual void f(); };\n" "class Derived : Base { void f() const; }"); ASSERT_EQUALS("", errout.str()); checkOverride("class Base { virtual void f(); };\n" "class Derived : Base { void f() volatile; }"); ASSERT_EQUALS("", errout.str()); checkOverride("class Base { virtual void f(); };\n" "class Derived : Base { void f() &; }"); ASSERT_EQUALS("", errout.str()); checkOverride("class Base { virtual void f(); };\n" "class Derived : Base { void f() &&; }"); ASSERT_EQUALS("", errout.str()); } #define checkUnsafeClassRefMember(code) checkUnsafeClassRefMember_(code, __FILE__, __LINE__) void checkUnsafeClassRefMember_(const char code[], const char* file, int line) { // Clear the error log errout.str(""); Settings settings; settings.safeChecks.classes = true; settings.severity.enable(Severity::warning); // Tokenize.. Tokenizer tokenizer(&settings, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); // Check.. CheckClass checkClass(&tokenizer, &settings, this); (checkClass.checkUnsafeClassRefMember)(); } void unsafeClassRefMember() { checkUnsafeClassRefMember("class C { C(const std::string &s) : s(s) {} const std::string &s; };"); ASSERT_EQUALS("[test.cpp:1]: (warning) Unsafe class: The const reference member 'C::s' is initialized by a const reference constructor argument. You need to be careful about lifetime issues.\n", errout.str()); } #define checkThisUseAfterFree(code) checkThisUseAfterFree_(code, __FILE__, __LINE__) void checkThisUseAfterFree_(const char code[], const char* file, int line) { // Clear the error log errout.str(""); // Tokenize.. Tokenizer tokenizer(&settings1, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); // Check.. CheckClass checkClass(&tokenizer, &settings1, this); (checkClass.checkThisUseAfterFree)(); } void thisUseAfterFree() { setMultiline(); // Calling method.. checkThisUseAfterFree("class C {\n" "public:\n" " void dostuff() { delete mInstance; hello(); }\n" "private:\n" " static C *mInstance;\n" " void hello() {}\n" "};"); ASSERT_EQUALS("test.cpp:3:warning:Calling method 'hello()' when 'this' might be invalid\n" "test.cpp:5:note:Assuming 'mInstance' is used as 'this'\n" "test.cpp:3:note:Delete 'mInstance', invalidating 'this'\n" "test.cpp:3:note:Call method when 'this' is invalid\n", errout.str()); checkThisUseAfterFree("class C {\n" "public:\n" " void dostuff() { mInstance.reset(); hello(); }\n" "private:\n" " static std::shared_ptr mInstance;\n" " void hello() {}\n" "};"); ASSERT_EQUALS("test.cpp:3:warning:Calling method 'hello()' when 'this' might be invalid\n" "test.cpp:5:note:Assuming 'mInstance' is used as 'this'\n" "test.cpp:3:note:Delete 'mInstance', invalidating 'this'\n" "test.cpp:3:note:Call method when 'this' is invalid\n", errout.str()); checkThisUseAfterFree("class C {\n" "public:\n" " void dostuff() { reset(); hello(); }\n" "private:\n" " static std::shared_ptr mInstance;\n" " void hello();\n" " void reset() { mInstance.reset(); }\n" "};"); ASSERT_EQUALS("test.cpp:3:warning:Calling method 'hello()' when 'this' might be invalid\n" "test.cpp:5:note:Assuming 'mInstance' is used as 'this'\n" "test.cpp:7:note:Delete 'mInstance', invalidating 'this'\n" "test.cpp:3:note:Call method when 'this' is invalid\n", errout.str()); // Use member.. checkThisUseAfterFree("class C {\n" "public:\n" " void dostuff() { delete self; x = 123; }\n" "private:\n" " static C *self;\n" " int x;\n" "};"); ASSERT_EQUALS("test.cpp:3:warning:Using member 'x' when 'this' might be invalid\n" "test.cpp:5:note:Assuming 'self' is used as 'this'\n" "test.cpp:3:note:Delete 'self', invalidating 'this'\n" "test.cpp:3:note:Call method when 'this' is invalid\n", errout.str()); checkThisUseAfterFree("class C {\n" "public:\n" " void dostuff() { delete self; x[1] = 123; }\n" "private:\n" " static C *self;\n" " std::map x;\n" "};"); ASSERT_EQUALS("test.cpp:3:warning:Using member 'x' when 'this' might be invalid\n" "test.cpp:5:note:Assuming 'self' is used as 'this'\n" "test.cpp:3:note:Delete 'self', invalidating 'this'\n" "test.cpp:3:note:Call method when 'this' is invalid\n", errout.str()); // Assign 'shared_from_this()' to non-static smart pointer checkThisUseAfterFree("class C {\n" "public:\n" " void hold() { mInstance = shared_from_this(); }\n" " void dostuff() { mInstance.reset(); hello(); }\n" "private:\n" " std::shared_ptr mInstance;\n" " void hello() {}\n" "};"); ASSERT_EQUALS("test.cpp:4:warning:Calling method 'hello()' when 'this' might be invalid\n" "test.cpp:6:note:Assuming 'mInstance' is used as 'this'\n" "test.cpp:4:note:Delete 'mInstance', invalidating 'this'\n" "test.cpp:4:note:Call method when 'this' is invalid\n", errout.str()); // Avoid FP.. checkThisUseAfterFree("class C {\n" "public:\n" " void dostuff() { delete self; x = 123; }\n" "private:\n" " C *self;\n" " int x;\n" "};"); ASSERT_EQUALS("", errout.str()); checkThisUseAfterFree("class C {\n" "public:\n" " void hold() { mInstance = shared_from_this(); }\n" " void dostuff() { if (x) { mInstance.reset(); return; } hello(); }\n" "private:\n" " std::shared_ptr mInstance;\n" " void hello() {}\n" "};"); ASSERT_EQUALS("", errout.str()); checkThisUseAfterFree("class C\n" "{\n" "public:\n" " explicit C(const QString& path) : mPath( path ) {}\n" "\n" " static void initialize(const QString& path) {\n" // <- avoid fp in static method " if (instanceSingleton)\n" " delete instanceSingleton;\n" " instanceSingleton = new C(path);\n" " }\n" "private:\n" " static C* instanceSingleton;\n" "};\n" "\n" "C* C::instanceSingleton;"); ASSERT_EQUALS("", errout.str()); // Avoid false positive when pointer is deleted in lambda checkThisUseAfterFree("class C {\n" "public:\n" " void foo();\n" " void set() { p = this; }\n" " void dostuff() {}\n" " C* p;\n" "};\n" "\n" "void C::foo() {\n" " auto done = [this] () { delete p; };\n" " dostuff();\n" " done();\n" "}"); ASSERT_EQUALS("", errout.str()); } void ctu(const std::vector &code) { Settings settings; CheckClass check; // getFileInfo std::list fileInfo; for (const std::string& c: code) { Tokenizer tokenizer(&settings, this); std::istringstream istr(c); ASSERT(tokenizer.tokenize(istr, (std::to_string(fileInfo.size()) + ".cpp").c_str())); fileInfo.push_back(check.getFileInfo(&tokenizer, &settings)); } // Check code.. errout.str(""); check.analyseWholeProgram(nullptr, fileInfo, settings, *this); while (!fileInfo.empty()) { delete fileInfo.back(); fileInfo.pop_back(); } } void ctuOneDefinitionRule() { ctu({"class C { C() { std::cout << 0; } };", "class C { C() { std::cout << 1; } };"}); ASSERT_EQUALS("[1.cpp:1] -> [0.cpp:1]: (error) The one definition rule is violated, different classes/structs have the same name 'C'\n", errout.str()); ctu({"class C { C(); }; C::C() { std::cout << 0; }", "class C { C(); }; C::C() { std::cout << 1; }"}); ASSERT_EQUALS("[1.cpp:1] -> [0.cpp:1]: (error) The one definition rule is violated, different classes/structs have the same name 'C'\n", errout.str()); ctu({"class C { C() {} };\n", "class C { C() {} };\n"}); ASSERT_EQUALS("", errout.str()); ctu({"class C { C(); }; C::C(){}", "class C { C(); }; C::C(){}"}); ASSERT_EQUALS("", errout.str()); ctu({"class A::C { C() { std::cout << 0; } };", "class B::C { C() { std::cout << 1; } };"}); ASSERT_EQUALS("", errout.str()); } #define getFileInfo(code) getFileInfo_(code, __FILE__, __LINE__) void getFileInfo_(const char code[], const char* file, int line) { // Clear the error log errout.str(""); // Tokenize.. Tokenizer tokenizer(&settings1, this); std::istringstream istr(code); ASSERT_LOC(tokenizer.tokenize(istr, "test.cpp"), file, line); // Check.. CheckClass checkClass(&tokenizer, &settings1, this); Check::FileInfo * fileInfo = (checkClass.getFileInfo)(&tokenizer, &settings1); delete fileInfo; } void testGetFileInfo() { getFileInfo("void foo() { union { struct { }; }; }"); // don't crash getFileInfo("struct sometype { sometype(); }; sometype::sometype() = delete;"); // don't crash } }; REGISTER_TEST(TestClass)