/*
* 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"
"";
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(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(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 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 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());
}
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)