668 lines
19 KiB
C++
668 lines
19 KiB
C++
/*
|
|
* Cppcheck - A tool for static C/C++ code analysis
|
|
* Copyright (C) 2007-2012 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 <sstream>
|
|
|
|
extern std::ostringstream errout;
|
|
|
|
class TestUnusedPrivateFunction : public TestFixture {
|
|
public:
|
|
TestUnusedPrivateFunction() : TestFixture("TestUnusedPrivateFunction")
|
|
{ }
|
|
|
|
private:
|
|
void run() {
|
|
TEST_CASE(test1);
|
|
TEST_CASE(test2);
|
|
TEST_CASE(test3);
|
|
TEST_CASE(test4);
|
|
TEST_CASE(test5);
|
|
TEST_CASE(test6); // ticket #2602
|
|
|
|
// [ 2236547 ] False positive --style unused function, called via pointer
|
|
TEST_CASE(func_pointer1);
|
|
TEST_CASE(func_pointer2);
|
|
TEST_CASE(func_pointer3);
|
|
TEST_CASE(func_pointer4); // ticket #2807
|
|
TEST_CASE(func_pointer5); // ticket #2233
|
|
|
|
TEST_CASE(ctor);
|
|
|
|
TEST_CASE(classInClass);
|
|
TEST_CASE(sameFunctionNames);
|
|
TEST_CASE(incompleteImplementation);
|
|
|
|
TEST_CASE(derivedClass); // skip warning for derived classes. It might be a virtual function.
|
|
|
|
TEST_CASE(friendClass);
|
|
|
|
TEST_CASE(borland1); // skip FP when using __property
|
|
TEST_CASE(borland2); // skip FP when using __published
|
|
|
|
// No false positives when there are "unused" templates that are removed in the simplified token list
|
|
TEST_CASE(template1);
|
|
|
|
// #2407 - FP when called from operator()
|
|
TEST_CASE(fp_operator);
|
|
TEST_CASE(testDoesNotIdentifyMethodAsFirstFunctionArgument); // #2480
|
|
TEST_CASE(testDoesNotIdentifyMethodAsMiddleFunctionArgument);
|
|
TEST_CASE(testDoesNotIdentifyMethodAsLastFunctionArgument);
|
|
|
|
TEST_CASE(multiFile);
|
|
TEST_CASE(unknownBaseTemplate); // ticket #2580
|
|
}
|
|
|
|
|
|
void check(const char code[]) {
|
|
// Clear the error buffer..
|
|
errout.str("");
|
|
|
|
Settings settings;
|
|
settings.addEnabled("style");
|
|
|
|
// Tokenize..
|
|
Tokenizer tokenizer(&settings, this);
|
|
std::istringstream istr(code);
|
|
tokenizer.tokenize(istr, "test.cpp");
|
|
tokenizer.simplifyTokenList();
|
|
|
|
// Check for unused private functions..
|
|
CheckClass checkClass(&tokenizer, &settings, this);
|
|
checkClass.privateFunctions();
|
|
}
|
|
|
|
|
|
|
|
void test1() {
|
|
check("class Fred\n"
|
|
"{\n"
|
|
"private:\n"
|
|
" unsigned int f();\n"
|
|
"public:\n"
|
|
" Fred();\n"
|
|
"};\n"
|
|
"\n"
|
|
"Fred::Fred()\n"
|
|
"{ }\n"
|
|
"\n"
|
|
"unsigned int Fred::f()\n"
|
|
"{ }\n");
|
|
|
|
ASSERT_EQUALS("[test.cpp:4]: (style) Unused private function 'Fred::f'\n", errout.str());
|
|
|
|
check("#file \"p.h\"\n"
|
|
"class Fred\n"
|
|
"{\n"
|
|
"private:\n"
|
|
" unsigned int f();\n"
|
|
"public:\n"
|
|
" Fred();\n"
|
|
"};\n"
|
|
"\n"
|
|
"#endfile\n"
|
|
"Fred::Fred()\n"
|
|
"{ }\n"
|
|
"\n"
|
|
"unsigned int Fred::f()\n"
|
|
"{ }\n");
|
|
|
|
ASSERT_EQUALS("[p.h:4]: (style) Unused private function 'Fred::f'\n", errout.str());
|
|
|
|
check("#file \"p.h\"\n"
|
|
"class Fred\n"
|
|
"{\n"
|
|
"private:\n"
|
|
"void f();\n"
|
|
"};\n"
|
|
"\n"
|
|
"\n"
|
|
"#endfile\n"
|
|
"\n"
|
|
"void Fred::f()\n"
|
|
"{\n"
|
|
"}\n"
|
|
"\n");
|
|
ASSERT_EQUALS("[p.h:4]: (style) Unused private function 'Fred::f'\n", errout.str());
|
|
|
|
// Don't warn about include files which implementation we don't see
|
|
check("#file \"p.h\"\n"
|
|
"class Fred\n"
|
|
"{\n"
|
|
"private:\n"
|
|
"void f();\n"
|
|
"void g() {}\n"
|
|
"};\n"
|
|
"\n"
|
|
"#endfile\n"
|
|
"\n"
|
|
"int main()\n"
|
|
"{\n"
|
|
"}\n"
|
|
"\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
void test2() {
|
|
check("class A {\n"
|
|
"public:\n"
|
|
" A();\n"
|
|
"\n"
|
|
" void a() const\n"
|
|
" { b(); }\n"
|
|
"private:\n"
|
|
" void b( ) const\n"
|
|
" { }\n"
|
|
"};\n"
|
|
"\n"
|
|
"A::A()\n"
|
|
"{ }\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
void test3() {
|
|
check("class A {\n"
|
|
"public:\n"
|
|
" A() { }\n"
|
|
" ~A();\n"
|
|
"private:\n"
|
|
" void B() { }\n"
|
|
"};\n"
|
|
"\n"
|
|
"A::~A()\n"
|
|
"{ B(); }\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
void test4() {
|
|
check("class A {\n"
|
|
"public:\n"
|
|
" A();\n"
|
|
"private:\n"
|
|
" bool _owner;\n"
|
|
" void b() { }\n"
|
|
"};\n"
|
|
"\n"
|
|
"A::A() : _owner(false)\n"
|
|
"{ b(); }\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
void test5() {
|
|
check("class A {\n"
|
|
"private:\n"
|
|
" A() : lock(new Lock())\n"
|
|
" { }\n"
|
|
" Lock *lock;\n"
|
|
"};\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void test6() { // ticket #2602 segmentation fault
|
|
check("class A {\n"
|
|
" A& operator=(const A&);\n"
|
|
"};\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void func_pointer1() {
|
|
check("class Fred\n"
|
|
"{\n"
|
|
"private:\n"
|
|
" typedef void (*testfp)();\n"
|
|
"\n"
|
|
" testfp get()\n"
|
|
" {\n"
|
|
" return test;\n"
|
|
" }\n"
|
|
"\n"
|
|
" static void test()\n"
|
|
" { }\n"
|
|
"\n"
|
|
"public:\n"
|
|
" Fred();\n"
|
|
"};\n"
|
|
"\n"
|
|
"Fred::Fred()\n"
|
|
"{}\n");
|
|
|
|
ASSERT_EQUALS("[test.cpp:6]: (style) Unused private function 'Fred::get'\n", errout.str());
|
|
}
|
|
|
|
|
|
|
|
void func_pointer2() {
|
|
check("class UnusedPrivateFunctionMemberPointer\n"
|
|
"{\n"
|
|
"public:\n"
|
|
" UnusedPrivateFunctionMemberPointer()\n"
|
|
" : mObserver(this, &UnusedPrivateFunctionMemberPointer::callback)\n"
|
|
" {}\n"
|
|
"\n"
|
|
"private:\n"
|
|
" void callback(const& unsigned) const {}\n"
|
|
"\n"
|
|
" Observer<UnusedPrivateFunctionMemberPointer, unsigned> mObserver;\n"
|
|
"};\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
void func_pointer3() {
|
|
check("class c1\n"
|
|
"{\n"
|
|
"public:\n"
|
|
" c1()\n"
|
|
" { sigc::mem_fun(this, &c1::f1); }\n"
|
|
"\n"
|
|
"private:\n"
|
|
" void f1() const {}\n"
|
|
"};\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
void func_pointer4() { // ticket #2807
|
|
check("class myclass {\n"
|
|
"public:\n"
|
|
" myclass();\n"
|
|
"private:\n"
|
|
" static void f();\n"
|
|
" void (*fptr)();\n"
|
|
"};\n"
|
|
"myclass::myclass() { fptr = &f; }\n"
|
|
"void myclass::f() {}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
void func_pointer5() {
|
|
check("class A {\n"
|
|
"public:\n"
|
|
" A() { f = A::func; }\n"
|
|
" void (*f)();\n"
|
|
"private:\n"
|
|
" static void func() { }\n"
|
|
"};\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
|
|
void ctor() {
|
|
check("class PrivateCtor\n"
|
|
"{\n"
|
|
"private:\n"
|
|
" PrivateCtor(int threadNum) :\n"
|
|
" numOfThreads(threadNum)\n"
|
|
" {\n"
|
|
" }\n"
|
|
"\n"
|
|
" int numOfThreads;\n"
|
|
"};\n");
|
|
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
void classInClass() {
|
|
check("class A\n"
|
|
"{\n"
|
|
"public:\n"
|
|
"\n"
|
|
" class B\n"
|
|
" {\n"
|
|
" private:\n"
|
|
" };\n"
|
|
"\n"
|
|
" static void f()\n"
|
|
" { }\n"
|
|
"};\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("class A\n"
|
|
"{\n"
|
|
"public:\n"
|
|
" A()\n"
|
|
" { }\n"
|
|
"\n"
|
|
"private:\n"
|
|
" void f()\n"
|
|
" { }\n"
|
|
"\n"
|
|
" class B\n"
|
|
" {\n"
|
|
" public:\n"
|
|
" B(A *a)\n"
|
|
" { a->f(); }\n"
|
|
" };\n"
|
|
"};\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
void sameFunctionNames() {
|
|
check("class A\n"
|
|
"{\n"
|
|
"public:\n"
|
|
" void a()\n"
|
|
" {\n"
|
|
" f(1);\n"
|
|
" }\n"
|
|
"\n"
|
|
"private:\n"
|
|
" void f() { }\n"
|
|
" void f(int) { }\n"
|
|
"};");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void incompleteImplementation() {
|
|
// The implementation for "A::a" is missing - so don't check if
|
|
// "A::b" is used or not
|
|
check("#file \"test.h\"\n"
|
|
"class A\n"
|
|
"{\n"
|
|
"public:\n"
|
|
" A()\n"
|
|
" void a();\n"
|
|
"private:\n"
|
|
" void b();\n"
|
|
"};\n"
|
|
"#endfile\n"
|
|
"A::A() { }\n"
|
|
"void A::b() { }\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void derivedClass() {
|
|
// skip warning in derived classes in case the base class is invisible
|
|
check("class derived : public base\n"
|
|
"{\n"
|
|
"public:\n"
|
|
" derived() : base() { }\n"
|
|
"private:\n"
|
|
" void f();\n"
|
|
"};\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("class base {\n"
|
|
"public:\n"
|
|
" virtual void foo();\n"
|
|
" void bar();\n"
|
|
"};\n"
|
|
"class derived : public base {\n"
|
|
"private:\n"
|
|
" void foo() {}\n" // Skip for overrides of virtual functions of base
|
|
" void bar() {}\n" // Don't skip if no function is overriden
|
|
"};");
|
|
ASSERT_EQUALS("[test.cpp:9]: (style) Unused private function 'derived::bar'\n", errout.str());
|
|
|
|
check("class Base {\n"
|
|
"private:\n"
|
|
" virtual void func() = 0;\n"
|
|
"public:\n"
|
|
" void public_func() {\n"
|
|
" func();\n"
|
|
" };\n"
|
|
"};\n"
|
|
"\n"
|
|
"class Derived1: public Base {\n"
|
|
"private:\n"
|
|
" void func() {}\n"
|
|
"};\n"
|
|
"class Derived2: public Derived1 {\n"
|
|
"private:\n"
|
|
" void func() {}\n"
|
|
"};");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void friendClass() {
|
|
// ticket #2459 - friend class
|
|
check("class Foo {\n"
|
|
"private:\n"
|
|
" friend Bar;\n" // Unknown friend class
|
|
" void f() { }\n"
|
|
"};");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("struct Bar {\n"
|
|
" void g() { f(); }\n" // Friend class seen, but f() used in it
|
|
"};\n"
|
|
"class Foo {\n"
|
|
"private:\n"
|
|
" friend Bar;\n"
|
|
" void f() { }\n"
|
|
"};");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("class Bar {\n" // Friend class seen, f() not used in it
|
|
"};\n"
|
|
"class Foo {\n"
|
|
" friend Bar;\n"
|
|
" void f() { }\n"
|
|
"};");
|
|
ASSERT_EQUALS("[test.cpp:5]: (style) Unused private function 'Foo::f'\n", errout.str());
|
|
}
|
|
|
|
void borland1() {
|
|
// ticket #2034 - Borland C++ __property
|
|
check("class Foo {\n"
|
|
"private:\n"
|
|
" int getx() {\n"
|
|
" return 123;\n"
|
|
" }\n"
|
|
"public:\n"
|
|
" Foo() { }\n"
|
|
" __property int x = {read=getx}\n"
|
|
"};");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void borland2() {
|
|
// ticket #3661 - Borland C++ __published
|
|
check("class Foo {\n"
|
|
"__published:\n"
|
|
" int getx() {\n"
|
|
" return 123;\n"
|
|
" }\n"
|
|
"public:\n"
|
|
" Foo() { }\n"
|
|
"};");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void template1() {
|
|
// ticket #2067 - Template methods do not "use" private ones
|
|
check("class A {\n"
|
|
"public:\n"
|
|
" template <class T>\n"
|
|
" T getVal() const;\n"
|
|
"\n"
|
|
"private:\n"
|
|
" int internalGetVal() const { return 8000; }\n"
|
|
"};\n"
|
|
"\n"
|
|
"template <class T>\n"
|
|
"T A::getVal() const {\n"
|
|
" return internalGetVal();\n"
|
|
"};\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void fp_operator() {
|
|
// #2407 - FP when function is called from operator()
|
|
check("class Fred\n"
|
|
"{\n"
|
|
"public:\n"
|
|
" void operator()(int x) {\n"
|
|
" startListening();\n"
|
|
" }\n"
|
|
"\n"
|
|
"private:\n"
|
|
" void startListening() {\n"
|
|
" }\n"
|
|
"};\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("class Fred\n"
|
|
"{\n"
|
|
"public:\n"
|
|
" void operator()(int x) {\n"
|
|
" }\n"
|
|
"\n"
|
|
"private:\n"
|
|
" void startListening() {\n"
|
|
" }\n"
|
|
"};\n");
|
|
ASSERT_EQUALS("[test.cpp:8]: (style) Unused private function 'Fred::startListening'\n", errout.str());
|
|
}
|
|
|
|
void testDoesNotIdentifyMethodAsFirstFunctionArgument() {
|
|
check("#include <iostream>"
|
|
"void callback(void (*func)(int), int arg)"
|
|
"{"
|
|
" (*func)(arg);"
|
|
"}"
|
|
"class MountOperation"
|
|
"{"
|
|
" static void Completed(int i);"
|
|
"public:"
|
|
" MountOperation(int i);"
|
|
"};"
|
|
"void MountOperation::Completed(int i)"
|
|
"{"
|
|
" std::cerr << i << std::endl;"
|
|
"}"
|
|
"MountOperation::MountOperation(int i)"
|
|
"{"
|
|
" callback(MountOperation::Completed, i);"
|
|
"}"
|
|
"int main(void)"
|
|
"{"
|
|
" MountOperation aExample(10);"
|
|
"}"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void testDoesNotIdentifyMethodAsMiddleFunctionArgument() {
|
|
check("#include <iostream>"
|
|
"void callback(char, void (*func)(int), int arg)"
|
|
"{"
|
|
" (*func)(arg);"
|
|
"}"
|
|
"class MountOperation"
|
|
"{"
|
|
" static void Completed(int i);"
|
|
"public:"
|
|
" MountOperation(int i);"
|
|
"};"
|
|
"void MountOperation::Completed(int i)"
|
|
"{"
|
|
" std::cerr << i << std::endl;"
|
|
"}"
|
|
"MountOperation::MountOperation(int i)"
|
|
"{"
|
|
" callback('a', MountOperation::Completed, i);"
|
|
"}"
|
|
"int main(void)"
|
|
"{"
|
|
" MountOperation aExample(10);"
|
|
"}"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void testDoesNotIdentifyMethodAsLastFunctionArgument() {
|
|
check("#include <iostream>"
|
|
"void callback(int arg, void (*func)(int))"
|
|
"{"
|
|
" (*func)(arg);"
|
|
"}"
|
|
"class MountOperation"
|
|
"{"
|
|
" static void Completed(int i);"
|
|
"public:"
|
|
" MountOperation(int i);"
|
|
"};"
|
|
"void MountOperation::Completed(int i)"
|
|
"{"
|
|
" std::cerr << i << std::endl;"
|
|
"}"
|
|
"MountOperation::MountOperation(int i)"
|
|
"{"
|
|
" callback(i, MountOperation::Completed);"
|
|
"}"
|
|
"int main(void)"
|
|
"{"
|
|
" MountOperation aExample(10);"
|
|
"}"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void multiFile() { // ticket #2567
|
|
check("#file \"test.h\"\n"
|
|
"struct Fred\n"
|
|
"{\n"
|
|
" Fred()\n"
|
|
" {\n"
|
|
" Init();\n"
|
|
" }\n"
|
|
"private:\n"
|
|
" void Init();\n"
|
|
"};\n"
|
|
"#endfile\n"
|
|
"void Fred::Init()\n"
|
|
"{\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void unknownBaseTemplate() { // ticket #2580
|
|
check("class Bla : public Base2<Base> {\n"
|
|
"public:\n"
|
|
" Bla() {}\n"
|
|
"private:\n"
|
|
" virtual void F() const;\n"
|
|
"};\n"
|
|
"void Bla::F() const { }");
|
|
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
};
|
|
|
|
REGISTER_TEST(TestUnusedPrivateFunction)
|
|
|