walkero
/
cppcheck
1
0
Fork 0
Code Issues Pull Requests Projects Releases 1 Wiki Activity
cppcheck/test/testclass.cpp

6343 lines
250 KiB
C++
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2015 Daniel Marjamäki and 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 <http://www.gnu.org/licenses/>.
*/
#include "tokenize.h"
#include "checkclass.h"
#include "testsuite.h"
#include <tinyxml2.h>
class TestClass : public TestFixture {
public:
TestClass() : TestFixture("TestClass") {
}
private:
void run() {
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(operatorEq1);
TEST_CASE(operatorEq2);
TEST_CASE(operatorEq3); // ticket #3051
TEST_CASE(operatorEq4); // ticket #3114
TEST_CASE(operatorEq5); // ticket #3296
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(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(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(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(initializerListOrder);
TEST_CASE(initializerListUsage);
TEST_CASE(selfInitialization);
TEST_CASE(usageBeforeInitialization);
TEST_CASE(pureVirtualFunctionCall);
TEST_CASE(pureVirtualFunctionCallOtherClass);
TEST_CASE(pureVirtualFunctionCallWithBody);
TEST_CASE(pureVirtualFunctionCallPrevented);
TEST_CASE(duplInheritedMembers);
TEST_CASE(explicitConstructors);
}
void checkExplicitConstructors(const char code[]) {
// Clear the error log
errout.str("");
Settings settings;
settings.addEnabled("style");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList2();
// Check..
CheckClass checkClass(&tokenizer, &settings, this);
checkClass.checkExplicitConstructors();
}
void explicitConstructors() {
checkExplicitConstructors("class Class \n"
"{ \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"
"{ \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"
"{ \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"
"{ \n"
" Class(int i) { } \n"
"};");
ASSERT_EQUALS("[test.cpp:3]: (style) Class 'Class' has a constructor with 1 argument that is not explicit.\n", errout.str());
checkExplicitConstructors("class Class \n"
"{ \n"
" Class(const Class& other) { } \n"
" virtual int i() = 0; \n"
"};");
ASSERT_EQUALS("[test.cpp:3]: (style) Abstract class 'Class' has a copy/move constructor that is not explicit.\n", errout.str());
checkExplicitConstructors("class Class \n"
"{ \n"
" Class(Class&& other) { } \n"
" virtual int i() = 0; \n"
"};");
ASSERT_EQUALS("[test.cpp:3]: (style) Abstract class 'Class' has a copy/move constructor that is not explicit.\n", errout.str());
}
void checkDuplInheritedMembers(const char code[]) {
// Clear the error log
errout.str("");
Settings settings;
settings.addEnabled("warning");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList2();
// Check..
CheckClass checkClass(&tokenizer, &settings, 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:6] -> [test.cpp:3]: (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:6] -> [test.cpp:3]: (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:9] -> [test.cpp:3]: (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:10] -> [test.cpp:3]: (warning) The struct 'Derived' defines member variable with name 'x' also defined in its parent class 'Base0'.\n"
"[test.cpp:10] -> [test.cpp:7]: (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());
}
void checkCopyConstructor(const char code[]) {
// Clear the error log
errout.str("");
Settings settings;
settings.addEnabled("style");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList2();
// Check..
CheckClass checkClass(&tokenizer, &settings, 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"
"};");
ASSERT_EQUALS("[test.cpp:5]: (style) 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"
"};");
TODO_ASSERT_EQUALS("[test.cpp:4]: (style) 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]: (style) 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"
"};");
TODO_ASSERT_EQUALS("[test.cpp:5]: (style) 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",
"[test.cpp:5]: (style) Value of pointer 'p', which points to allocated memory, is copied in copy constructor instead of allocating new memory.\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"
"};");
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"
"};");
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"
"};");
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"
"};");
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"
"};");
ASSERT_EQUALS("[test.cpp:1]: (style) 'class F' does not have a copy constructor which is recommended since the class contains a pointer to allocated memory.\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"
"};");
ASSERT_EQUALS("", errout.str());
checkCopyConstructor("class F : E\n"
"{\n"
" char *p;\n"
" F() {\n"
" p = malloc(100);\n"
" }\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"
"};");
ASSERT_EQUALS("", errout.str());
checkCopyConstructor("class E {};\n"
"class F : E {\n"
" char *p;\n"
" F() {\n"
" p = malloc(100);\n"
" }\n"
"};");
TODO_ASSERT_EQUALS("[test.cpp:2]: (style) 'class F' does not have a copy constructor which is recommended since the class contains a pointer to allocated memory.\n", "", errout.str());
checkCopyConstructor("class F {\n"
" char *p;\n"
" F() {\n"
" p = malloc(100);\n"
" }\n"
" F(F& f);\n" // non-copyable
"};");
ASSERT_EQUALS("", errout.str());
checkCopyConstructor("class F {\n"
" char *p;\n"
" F() : p(malloc(100)) {}\n"
"};");
ASSERT_EQUALS("[test.cpp:1]: (style) 'class F' does not have a copy constructor which is recommended since the class contains a pointer to allocated memory.\n", errout.str());
}
void copyConstructor2() { // ticket #4458
checkCopyConstructor("template <class _Tp>\n"
"class Vector\n"
"{\n"
"public:\n"
" Vector() {\n"
" _M_finish = new _Tp[ 42 ];\n"
" }\n"
" Vector( const Vector<_Tp>& v ) {\n"
" }\n"
" _Tp* _M_finish;\n"
"};");
ASSERT_EQUALS("", errout.str());
}
// Check the operator Equal
void checkOpertorEq(const char code[]) {
// Clear the error log
errout.str("");
Settings settings;
settings.addEnabled("style");
settings.inconclusive = true;
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList2();
// Check..
CheckClass checkClass(&tokenizer, &settings, this);
checkClass.operatorEq();
}
void operatorEq1() {
checkOpertorEq("class A\n"
"{\n"
"public:\n"
" void goo() {}"
" void operator=(const A&);\n"
"};");
ASSERT_EQUALS("[test.cpp:4]: (style) 'A::operator=' should return 'A &'.\n", errout.str());
checkOpertorEq("class A\n"
"{\n"
"public:\n"
" void goo() {}"
" void operator=(const A&)=delete;\n"
"};");
ASSERT_EQUALS("", errout.str());
checkOpertorEq("class A\n"
"{\n"
"private:\n"
" void operator=(const A&);\n"
"};");
ASSERT_EQUALS("", errout.str());
checkOpertorEq("class A\n"
"{\n"
"protected:\n"
" void operator=(const A&);\n"
"};");
ASSERT_EQUALS("", errout.str());
checkOpertorEq("class A\n"
"{\n"
"private:\n"
" void operator=(const A&)=delete;\n"
"};");
ASSERT_EQUALS("", errout.str());
checkOpertorEq("class A\n"
"{\n"
" void operator=(const A&);\n"
"};");
ASSERT_EQUALS("", errout.str());
checkOpertorEq("class A\n"
"{\n"
"public:\n"
" void goo() {}\n"
"private:\n"
" void operator=(const A&);\n"
"};");
ASSERT_EQUALS("", errout.str());
checkOpertorEq("class A\n"
"{\n"
"public:\n"
" void operator=(const A&);\n"
"};\n"
"class B\n"
"{\n"
"public:\n"
" void operator=(const B&);\n"
"};");
ASSERT_EQUALS("[test.cpp:4]: (style) 'A::operator=' should return 'A &'.\n"
"[test.cpp:9]: (style) 'B::operator=' should return 'B &'.\n", errout.str());
checkOpertorEq("struct A\n"
"{\n"
" void operator=(const A&);\n"
"};");
ASSERT_EQUALS("[test.cpp:3]: (style) 'A::operator=' should return 'A &'.\n", errout.str());
checkOpertorEq("struct A\n"
"{\n"
" void operator=(const A&)=delete;\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void operatorEq2() {
checkOpertorEq("class A\n"
"{\n"
"public:\n"
" void * operator=(const A&);\n"
"};");
ASSERT_EQUALS("[test.cpp:4]: (style) 'A::operator=' should return 'A &'.\n", errout.str());
checkOpertorEq("class A\n"
"{\n"
"public:\n"
" A * operator=(const A&);\n"
"};");
ASSERT_EQUALS("[test.cpp:4]: (style) 'A::operator=' should return 'A &'.\n", errout.str());
checkOpertorEq("class A\n"
"{\n"
"public:\n"
" const A & operator=(const A&);\n"
"};");
ASSERT_EQUALS("[test.cpp:4]: (style) 'A::operator=' should return 'A &'.\n", errout.str());
checkOpertorEq("class A\n"
"{\n"
"public:\n"
" B & operator=(const A&);\n"
"};");
ASSERT_EQUALS("[test.cpp:4]: (style) 'A::operator=' should return 'A &'.\n", errout.str());
}
void operatorEq3() { // ticket #3051
checkOpertorEq("class A\n"
"{\n"
"public:\n"
" A * operator=(const A*);\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void operatorEq4() { // ticket #3114 (infinite loop)
checkOpertorEq("struct A {\n"
" A& operator=(A const& a) { return operator=(&a); }\n"
" A& operator=(const A*) { return *this; }\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void operatorEq5() { // ticket #3296 (virtual operator)
checkOpertorEq(
"class A {\n"
" virtual A& operator=(const A &a) {return *this};\n"
"};");
ASSERT_EQUALS("", errout.str());
}
// Check that operator Equal returns reference to this
void checkOpertorEqRetRefThis(const char code[]) {
// Clear the error log
errout.str("");
Settings settings;
settings.addEnabled("style");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList2();
// Check..
CheckClass checkClass(&tokenizer, &settings, 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());
}
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());
}
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());
}
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"
"};\n");
ASSERT_EQUALS("", errout.str());
}
// Check that operator Equal checks for assignment to self
void checkOpertorEqToSelf(const char code[]) {
// Clear the error log
errout.str("");
Settings settings;
settings.addEnabled("warning");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList2();
// Check..
CheckClass checkClass(&tokenizer, &settings, 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 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
void checkVirtualDestructor(const char code[], bool inconclusive = false) {
// Clear the error log
errout.str("");
Settings settings;
settings.inconclusive = inconclusive;
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList2();
// Check..
CheckClass checkClass(&tokenizer, &settings, 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 => no error
checkVirtualDestructor("class Base { public: ~Base(); };\n"
"class Derived : public Base { };"
"Base *base = new Derived;\n"
"delete base;");
ASSERT_EQUALS("", errout.str());
checkVirtualDestructor("class Base { public: ~Base(); };\n"
"class Derived : private Fred, public Base { };"
"Base *base = new Derived;\n"
"delete base;");
ASSERT_EQUALS("", errout.str());
}
void virtualDestructor5() {
// Derived class has empty destructor => no error
checkVirtualDestructor("class Base { public: ~Base(); };\n"
"class Derived : public Base { public: ~Derived() {} };"
"Base *base = new Derived;\n"
"delete base;");
ASSERT_EQUALS("", 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("", 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 <typename T> class A\n"
"{\n"
" public:\n"
" virtual ~A(){}\n"
"};\n"
"template <typename T> class AA\n"
"{\n"
" public:\n"
" ~AA(){}\n"
"};\n"
"class B : public A<int>, public AA<double>\n"
"{\n"
" public:\n"
" ~B(){int a;}\n"
"};\n"
"\n"
"AA<double> *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());
}
void checkNoMemset(const char code[]) {
Settings settings;
settings.addEnabled("warning");
settings.addEnabled("portability");
checkNoMemset(code,settings);
}
void checkNoMemset(const char code[], const Settings &settings) {
// Clear the error log
errout.str("");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// 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 method.\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 method.\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 method.\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());
}
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<int> 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<int> 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<int> 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<int> 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<int> > 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<int> > 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<int> > 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<int *> 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<int *> 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());
}
void memsetOnStdPodType() { // Ticket #5901
Settings settings;
const char xmldata[] = "<?xml version=\"1.0\"?>\n"
"<def>\n"
" <podtype name=\"uint8_t\" sign=\"u\" size=\"1\"/>\n"
"</def>";
tinyxml2::XMLDocument doc;
doc.Parse(xmldata, sizeof(xmldata));
settings.library.load(doc);
checkNoMemset("class A {\n"
" std::array<int, 10> 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::uint8_t b;\n"
" std::uint8_t c;\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 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 method.\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());
}
void checkThisSubtraction(const char code[]) {
// Clear the error log
errout.str("");
Settings settings;
settings.addEnabled("warning");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList2();
// Check..
CheckClass checkClass(&tokenizer, &settings, 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 ;\n");
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());
}
void checkConst(const char code[], const Settings *s = 0, bool inconclusive = true, bool verify = true) {
// Clear the error log
errout.str("");
// Check..
Settings settings;
if (s)
settings = *s;
else
settings.addEnabled("style");
settings.inconclusive = inconclusive;
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
const std::string str1(tokenizer.tokens()->stringifyList(0,true));
tokenizer.simplifyTokenList2();
const std::string str2(tokenizer.tokens()->stringifyList(0,true));
if (verify && str1 != str2)
warnUnsimplified(str1, str2);
CheckClass checkClass(&tokenizer, &settings, 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.\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.\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.\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.\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.\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.\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.\n"
"[test.cpp:10] -> [test.cpp:4]: (performance, inconclusive) Technically the member function 'Fred::foo2' can be static.\n"
"[test.cpp:11] -> [test.cpp:5]: (performance, inconclusive) Technically the member function 'Fred::foo3' can be static.\n"
"[test.cpp:12] -> [test.cpp:6]: (performance, inconclusive) Technically the member function 'Fred::foo4' can be static.\n"
"[test.cpp:13] -> [test.cpp:7]: (performance, inconclusive) Technically the member function 'Fred::foo5' can be static.\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() {
checkConst("struct Fred {\n"
" int array[10];\n"
" typedef int* (Fred::*UnspecifiedBoolType);\n"
" operator UnspecifiedBoolType() { };\n"
"};");
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 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.\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<int> GetVec() {return m_vec;}\n"
" std::pair<int,double> GetPair() {return m_pair;}\n"
"private:\n"
" std::vector<int> m_vec;\n"
" std::pair<int,double> 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<int> & GetVec() {return m_vec;}\n"
" const std::pair<int,double> & GetPair() {return m_pair;}\n"
"private:\n"
" std::vector<int> m_vec;\n"
" std::pair<int,double> 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<std::vector<int>,double> GetPair() {return m_pair;}\n"
"private:\n"
" std::pair<std::vector<int>,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<std::vector<int>,double>& GetPair() {return m_pair;}\n"
"private:\n"
" std::pair<std::vector<int>,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<std::vector<int>,double>& GetPair() {return m_pair;}\n"
"private:\n"
" std::pair<std::vector<int>,double> m_pair;\n"
"};");
ASSERT_EQUALS("", errout.str());
checkConst("using namespace std;"
"class A {\n"
"public:\n"
" A(){}\n"
" pair<int ,double> GetPair() {return m_pair;}\n"
"private:\n"
" pair<int ,double> 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<int ,double> & GetPair() {return m_pair;}\n"
"private:\n"
" pair<int ,double> 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<int ,double> & GetPair() {return m_pair;}\n"
"private:\n"
" pair<int ,double> m_pair;\n"
"};");
ASSERT_EQUALS("", errout.str());
checkConst("class A {\n"
"public:\n"
" A(){}\n"
" std::pair< int,std::vector<int> > GetPair() {return m_pair;}\n"
"private:\n"
" std::pair< int,std::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("class A {\n"
"public:\n"
" A(){}\n"
" const std::pair< int,std::vector<int> >& GetPair() {return m_pair;}\n"
"private:\n"
" std::pair< int,std::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("class A {\n"
"public:\n"
" A(){}\n"
" std::pair< int,std::vector<int> >& GetPair() {return m_pair;}\n"
"private:\n"
" std::pair< int,std::vector<int> > m_pair;\n"
"};");
ASSERT_EQUALS("", errout.str());
checkConst("using namespace std;"
"class A {\n"
"public:\n"
" A(){}\n"
" pair< vector<int>, int > GetPair() {return m_pair;}\n"
"private:\n"
" pair< vector<int>, 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>, int >& GetPair() {return m_pair;}\n"
"private:\n"
" pair< vector<int>, 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>, int >& GetPair() {return m_pair;}\n"
"private:\n"
" pair< vector<int>, int > m_pair;\n"
"};");
ASSERT_EQUALS("", errout.str());
checkConst("class A {\n"
"public:\n"
" A(){}\n"
" std::pair< std::vector<int>,std::vector<int> > GetPair() {return m_pair;}\n"
"private:\n"
" std::pair< std::vector<int>,std::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("class A {\n"
"public:\n"
" A(){}\n"
" const std::pair< std::vector<int>,std::vector<int> >& GetPair() {return m_pair;}\n"
"private:\n"
" std::pair< std::vector<int>,std::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("class A {\n"
"public:\n"
" A(){}\n"
" std::pair< std::vector<int>,std::vector<int> >& GetPair() {return m_pair;}\n"
"private:\n"
" std::pair< std::vector<int>,std::vector<int> > 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<int> GetVec() {return m_Vec;}\n"
"private:\n"
" vector<int> 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<int>& GetVec() {return m_Vec;}\n"
"private:\n"
" vector<int> 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<int>& GetVec() {return m_Vec;}\n"
"private:\n"
" vector<int> 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.\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<int *> x;\n"
"public:\n"
" list<int *> get() { return x; }\n"
"};");
ASSERT_EQUALS("", errout.str());
checkConst("class Fred {\n"
" list<const int *> x;\n"
"public:\n"
" list<const int *> 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<std::string &> x;\n"
"public:\n"
" std::list<std::string &> get() { return x; }\n"
"};");
ASSERT_EQUALS("", errout.str());
checkConst("class Fred {\n"
" std::list<const std::string &> x;\n"
"public:\n"
" std::list<const std::string &> 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<double> Type;\n"
" typedef Template2<Type> 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<QString, QString> *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"
"};\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"
"};\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"
"};\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<std::string> m_strVec;\n"
"};\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<std::string> m_strVec;\n"
"};\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<float>(delays_[index1], delays_[index2]);\n"
"}\n"
"float delays_[4];\n"
"};\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, false
);
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"
"};\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.\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 bool(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) << \"</table>\";\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<int> pView;\n"
" public:\n"
" SharedPtrHolder()\n"
" { }\n"
" void SetView(const std::shared_ptr<int> & 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<int> pNum;\n"
" public :\n"
" void SetNum(const ::std::tr1::shared_ptr<int> & apNum)\n"
" {\n"
" pNum = apNum;\n"
" }\n"
"};");
ASSERT_EQUALS("", errout.str());
checkConst("class SharedPtrHolder2\n"
"{\n"
" public:\n"
" typedef ::std::tr1::shared_ptr<int> 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<int> 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 <typename T>\n"
"struct PtrTypes\n"
"{\n"
" typedef ::std::tr1::shared_ptr<T> Shared;\n"
"};\n"
"class SharedPtrHolder4\n"
"{\n"
" private:\n"
" PtrTypes<int>::Shared pNum;\n"
" public :\n"
" void SetNum(const PtrTypes<int>::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.\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.\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.\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.\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.\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.\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.\n"
"[test.cpp:7]: (performance, inconclusive) Technically the member function 'Altren::fun2' can be static.\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.\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.\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<unsigned int,unsigned int> _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<int>\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.\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.\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.\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.\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"
"};");
ASSERT_EQUALS("[test.cpp:7]: (performance, inconclusive) Technically the member function 'MyGUI::types::TCoord::size' can be static.\n"
"[test.cpp:15]: (style, inconclusive) Technically the member function 'SelectorControl::getSize' can be const.\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.\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.\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.\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
checkConst("class MixerParticipant : public MixerParticipant {\n"
" int GetAudioFrame();\n"
"};\n"
"int MixerParticipant::GetAudioFrame() {\n"
" return 0;\n"
"}");
ASSERT_EQUALS("[test.cpp:4] -> [test.cpp:2]: (performance, inconclusive) Technically the member function 'MixerParticipant::GetAudioFrame' can be static.\n", errout.str());
checkConst("class MixerParticipant : public MixerParticipant {\n"
" bool InitializeFileReader() {\n"
" printf(\"music\");\n"
" }\n"
"};");
ASSERT_EQUALS("[test.cpp:2]: (performance, inconclusive) Technically the member function 'MixerParticipant::InitializeFileReader' can be static.\n", errout.str());
// 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<typename K> class Hash{/* ... */};
// didn't .
checkConst("template<>\n"
"class Hash<void> {\n"
"protected:\n"
" typedef Key::key_type key_type;\n"
" void set(const Key& key);\n"
"};\n"
"template<typename K, int KeySize>\n"
"class Hash : private Hash<void> {\n"
" typedef Hash<void> inherited;\n"
" void set(const Key& key) {\n"
" inherited::set(inherited::Key(key));\n"
" }\n"
"};\n", 0, false);
ASSERT_EQUALS("", errout.str());
}
void const62() {
checkConst("class A {\n"
" private:\n"
" std::unordered_map<unsigned int,unsigned int> _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 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.\n"
"[test.cpp:14]: (performance, inconclusive) Technically the member function 'Foo::bar4' can be static.\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.\n", errout.str());
}
void assigningPointerToPointerIsNotAConstOperation() {
checkConst("struct s\n"
"{\n"
" int** v;\n"
" void f()\n"
" {\n"
" v = 0;\n"
" }\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"
"};\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.\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.\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.\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.\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.\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.\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.\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.\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.\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.\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.\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.\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.\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.\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.\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.\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.\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.\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.\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.\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.\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.\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.\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.\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<int> 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<int> 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"
"};";
Settings settings;
settings.addEnabled("style");
checkConst(code, &settings, true);
ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Technically the member function 'foo::f' can be static.\n", errout.str());
checkConst(code, &settings, 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 checkInitializerListOrder(const char code[]) {
// Clear the error log
errout.str("");
// Check..
Settings settings;
settings.addEnabled("style");
settings.inconclusive = true;
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList2();
CheckClass checkClass(&tokenizer, &settings, 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());
}
void checkInitializationListUsage(const char code[]) {
// Clear the error log
errout.str("");
// Check..
Settings settings;
settings.addEnabled("performance");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList2();
CheckClass checkClass(&tokenizer, &settings, this);
checkClass.initializationListUsage();
}
void initializerListUsage() {
checkInitializationListUsage("class Fred {\n"
" int a;\n" // No message for builtin types: No performance gain
" int* b;\n" // No message for pointers: No performance gain
" Fred() { a = 0; b = 0; }\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<int> 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());
}
void checkSelfInitialization(const char code []) {
// Clear the error log
errout.str("");
// Check..
Settings settings;
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList2();
CheckClass checkClass(&tokenizer, &settings, 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"
" 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());
}
void checkUsageBeforeInitialization(const char code []) {
// Clear the error log
errout.str("");
// Check..
Settings settings;
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList2();
CheckClass checkClass(&tokenizer, &settings, this);
checkClass.checkUsageBeforeInitialization();
}
void usageBeforeInitialization() {
checkUsageBeforeInitialization("class A {\n" // Ticket #220
" int a;\n"
" double b;\n"
" double c;\n"
"public:\n"
" A(const double& x) {\n"
" a = a + 4;\n"
" c = b * 2;\n"
" b = x;\n"
" }\n"
"};\n");
ASSERT_EQUALS("[test.cpp:7]: (error) Member variable 'A::a' is used before it is initialized.\n"
"[test.cpp:8]: (error) Member variable 'A::b' is used before it is initialized.\n", errout.str());
checkUsageBeforeInitialization("class A {\n"
" int a;\n"
" double b;\n"
" double c;\n"
"public:\n"
" A(const double& x) : a(a+4), c(b*2), b(x) {}\n"
"};\n");
ASSERT_EQUALS("[test.cpp:6]: (error) Member variable 'A::a' is used before it is initialized.\n", errout.str());
checkUsageBeforeInitialization("class A {\n"
" int a;\n"
" double b;\n"
" double c;\n"
"public:\n"
" A(const double& x) : a(a++), b(c*2), c(x) {}\n"
"};\n");
ASSERT_EQUALS("[test.cpp:6]: (error) Member variable 'A::a' is used before it is initialized.\n"
"[test.cpp:6]: (error) Member variable 'A::c' is used before it is initialized.\n", errout.str());
checkUsageBeforeInitialization("class A {\n" // Ticket #4856
" int a;\n"
"public:\n"
" A() {\n"
" a++;\n"
" }\n"
"};\n");
ASSERT_EQUALS("[test.cpp:5]: (error) Member variable 'A::a' is used before it is initialized.\n", errout.str());
checkUsageBeforeInitialization("class A {\n"
" int* a;\n"
" int& b;\n"
" int c;\n"
"public:\n"
" A() : a(&c), b(c), c(0) {\n"
" c--;\n"
" }\n"
"};\n");
ASSERT_EQUALS("", errout.str());
checkUsageBeforeInitialization("class A {\n"
" int a;\n"
" int b;\n"
" int c;\n"
"public:\n"
" A(int _a, int _b) : a(++_a), b(a + _b) {\n"
" _a = c + _b;\n"
" c = a + b + _a + _b;\n"
" }\n"
"};\n");
ASSERT_EQUALS("[test.cpp:7]: (error) Member variable 'A::c' is used before it is initialized.\n", errout.str());
checkUsageBeforeInitialization("class A {\n"
" int a;\n"
" int b;\n"
"public:\n"
" A(const A& that) : a(that.a) {\n"
" b = that.b;\n"
" }\n"
"};\n");
ASSERT_EQUALS("", errout.str());
}
void checkPureVirtualFunctionCall(const char code[], const Settings *s = 0, bool inconclusive = true) {
// Clear the error log
errout.str("");
// Check..
Settings settings;
if (s)
settings = *s;
else
settings.addEnabled("warning");
settings.inconclusive = inconclusive;
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList2();
CheckClass checkClass(&tokenizer, &settings, this);
checkClass.checkPureVirtualFunctionCall();
}
void pureVirtualFunctionCall() {
checkPureVirtualFunctionCall("class A\n"
"{\n"
" virtual void pure()=0;\n"
" A();\n"
"};\n"
"A::A()\n"
"{pure();}\n");
ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:3]: (warning) Call of pure virtual function 'pure' in constructor.\n", errout.str());
checkPureVirtualFunctionCall("class A\n"
"{\n"
" virtual int pure()=0;\n"
" A();\n"
" int m;\n"
"};\n"
"A::A():m(A::pure())\n"
"{}\n");
ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:3]: (warning) Call of pure virtual function 'pure' in constructor.\n", errout.str());
checkPureVirtualFunctionCall("class A\n"
" {\n"
" virtual void pure()=0; \n"
" virtual ~A(); \n"
" int m; \n"
"};\n"
"A::~A()\n"
"{pure();}\n");
ASSERT_EQUALS("[test.cpp:8] -> [test.cpp:3]: (warning) Call of pure virtual function 'pure' in destructor.\n", errout.str());
checkPureVirtualFunctionCall("class A\n"
" {\n"
" virtual void pure()=0;\n"
" void nonpure()\n"
" {pure();}\n"
" A(); \n"
"};\n"
"A::A()\n"
"{nonpure();}\n");
ASSERT_EQUALS("[test.cpp:9] -> [test.cpp:5] -> [test.cpp:3]: (warning) Call of pure virtual function 'pure' in constructor.\n", errout.str());
checkPureVirtualFunctionCall("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"
"{}\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());
checkPureVirtualFunctionCall("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();}\n");
ASSERT_EQUALS("[test.cpp:10] -> [test.cpp:5] -> [test.cpp:3]: (warning) Call of pure virtual function 'pure' in destructor.\n", errout.str());
checkPureVirtualFunctionCall("class A\n"
"{\n"
" virtual void pure()=0;\n"
" A(bool b);\n"
"};\n"
"A::A(bool b)\n"
"{if (b) pure();}\n");
ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:3]: (warning) Call of pure virtual function 'pure' in constructor.\n", errout.str());
checkPureVirtualFunctionCall("class A\n"
" {\n"
" virtual void pure()=0; \n"
" virtual ~A(); \n"
" int m; \n"
"};\n"
"A::~A()\n"
"{if (b) pure();}\n");
ASSERT_EQUALS("[test.cpp:8] -> [test.cpp:3]: (warning) Call of pure virtual function 'pure' in destructor.\n", errout.str());
// ticket # 5831
checkPureVirtualFunctionCall("class abc {\n"
"public:\n"
" virtual ~abc() throw() {}\n"
" virtual void def(void* g) throw () = 0;\n"
"};\n");
ASSERT_EQUALS("", errout.str());
}
void pureVirtualFunctionCallOtherClass() {
checkPureVirtualFunctionCall("class A\n"
"{\n"
" virtual void pure()=0;\n"
" A(const A & a);\n"
"};\n"
"A::A(const A & a)\n"
"{a.pure();}\n");
ASSERT_EQUALS("", errout.str());
checkPureVirtualFunctionCall("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();}\n");
ASSERT_EQUALS("", errout.str());
}
void pureVirtualFunctionCallWithBody() {
checkPureVirtualFunctionCall("class A\n"
"{\n"
" virtual void pureWithBody()=0;\n"
" A();\n"
"};\n"
"A::A()\n"
"{pureWithBody();}\n"
"void A::pureWithBody()\n"
"{}\n");
ASSERT_EQUALS("", errout.str());
checkPureVirtualFunctionCall("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"
"{}\n");
ASSERT_EQUALS("", errout.str());
}
void pureVirtualFunctionCallPrevented() {
checkPureVirtualFunctionCall("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);}\n");
ASSERT_EQUALS("", errout.str());
checkPureVirtualFunctionCall("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);}\n");
ASSERT_EQUALS("", errout.str());
checkPureVirtualFunctionCall("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);}\n");
ASSERT_EQUALS("", errout.str());
}
};
REGISTER_TEST(TestClass)
Reference in New Issue View Git Blame Copy Permalink