/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2010 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/>.
*/
// Check for unused variables..
#include "testsuite.h"
#include "tokenize.h"
#include "checkother.h"
#include <sstream>
extern std::ostringstream errout;
class TestUnusedVar : public TestFixture
{
public:
TestUnusedVar() : TestFixture("TestUnusedVar")
{ }
private:
void run()
{
TEST_CASE(structmember1);
TEST_CASE(structmember2);
TEST_CASE(structmember3);
TEST_CASE(structmember4);
TEST_CASE(structmember5);
TEST_CASE(structmember6);
TEST_CASE(structmember7);
TEST_CASE(structmember8);
TEST_CASE(structmember_extern); // No false positives for extern structs
TEST_CASE(localvar1);
TEST_CASE(localvar2);
TEST_CASE(localvar3);
TEST_CASE(localvar4);
TEST_CASE(localvar5);
TEST_CASE(localvar6);
TEST_CASE(localvar7);
TEST_CASE(localvar8);
TEST_CASE(localvar9); // ticket #1605
TEST_CASE(localvar10);
TEST_CASE(localvar11);
TEST_CASE(localvar12);
TEST_CASE(localvar13); // ticket #1640
TEST_CASE(localvar14); // ticket #5
TEST_CASE(localvar15);
TEST_CASE(localvar16); // ticket #1709
TEST_CASE(localvar17); // ticket #1720
TEST_CASE(localvar18); // ticket #1723
TEST_CASE(localvar19); // ticket #1776
TEST_CASE(localvar20); // ticket #1799
TEST_CASE(localvar21); // ticket #1807
TEST_CASE(localvar22); // ticket #1811
TEST_CASE(localvar23); // ticket #1808
TEST_CASE(localvar24); // ticket #1803
TEST_CASE(localvar25); // ticket #1729
TEST_CASE(localvaralias1);
TEST_CASE(localvaralias2); // ticket #1637
TEST_CASE(localvaralias3); // ticket #1639
TEST_CASE(localvaralias4); // ticket #1643
TEST_CASE(localvaralias5); // ticket #1647
TEST_CASE(localvaralias6); // ticket #1729
TEST_CASE(localvaralias7); // ticket #1732
TEST_CASE(localvarasm);
TEST_CASE(localvarstatic);
// Don't give false positives for variables in structs/unions
TEST_CASE(localvarStruct1);
TEST_CASE(localvarStruct2);
TEST_CASE(localvarStruct3);
TEST_CASE(localvarStruct4); // Ticket #31: sigsegv on incomplete struct
TEST_CASE(localvarOp); // Usage with arithmetic operators
TEST_CASE(localvarInvert); // Usage with inverted variable
TEST_CASE(localvarIf); // Usage in if
TEST_CASE(localvarIfElse); // return tmp1 ? tmp2 : tmp3;
TEST_CASE(localvarOpAssign); // a |= b;
TEST_CASE(localvarFor); // for ( ; var; )
TEST_CASE(localvarShift); // 1 >> var
TEST_CASE(localvarCast);
TEST_CASE(localvarClass);
TEST_CASE(localvarUnused);
TEST_CASE(localvarFunction); // ticket #1799
}
void checkStructMemberUsage(const char code[])
{
// Tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
// Clear the error buffer..
errout.str("");
tokenizer.tokenize(istr, "test.cpp");
// Check for unused variables..
Settings settings;
settings._checkCodingStyle = true;
CheckOther checkOther(&tokenizer, &settings, this);
checkOther.checkStructMemberUsage();
}
void structmember1()
{
checkStructMemberUsage("struct abc\n"
"{\n"
" int a;\n"
" int b;\n"
" int c;\n"
"};\n");
ASSERT_EQUALS("[test.cpp:3]: (style) struct or union member 'abc::a' is never used\n"
"[test.cpp:4]: (style) struct or union member 'abc::b' is never used\n"
"[test.cpp:5]: (style) struct or union member 'abc::c' is never used\n", errout.str());
}
void structmember2()
{
checkStructMemberUsage("struct ABC\n"
"{\n"
" int a;\n"
" int b;\n"
" int c;\n"
"};\n"
"\n"
"void foo()\n"
"{\n"
" struct ABC abc;\n"
" int a = abc.a;\n"
" int b = abc.b;\n"
" int c = abc.c;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void structmember3()
{
checkStructMemberUsage("struct ABC\n"
"{\n"
" int a;\n"
" int b;\n"
" int c;\n"
"};\n"
"\n"
"static struct ABC abc[] = { {1, 2, 3} };\n"
"\n"
"void foo()\n"
"{\n"
" int a = abc[0].a;\n"
" int b = abc[0].b;\n"
" int c = abc[0].c;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void structmember4()
{
checkStructMemberUsage("struct ABC\n"
"{\n"
" const int a;\n"
"};\n"
"\n"
"void foo()\n"
"{\n"
" ABC abc;\n"
" if (abc.a == 2);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void structmember5()
{
checkStructMemberUsage("struct AB\n"
"{\n"
" int a;\n"
" int b;\n"
" void reset()\n"
" {\n"
" a = 1;\n"
" b = 2;\n"
" }\n"
"};\n"
"\n"
"void foo()\n"
"{\n"
" struct AB ab;\n"
" ab.reset();\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void structmember6()
{
checkStructMemberUsage("struct AB\n"
"{\n"
" int a;\n"
" int b;\n"
"};\n"
"\n"
"void foo(char *buf)\n"
"{\n"
" struct AB *ab = (struct AB *)&buf[10];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
checkStructMemberUsage("struct AB\n"
"{\n"
" int a;\n"
" int b;\n"
"};\n"
"\n"
"void foo(char *buf)\n"
"{\n"
" struct AB *ab = (AB *)&buf[10];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void structmember7()
{
checkStructMemberUsage("struct AB\n"
"{\n"
" int a;\n"
" int b;\n"
"};\n"
"\n"
"void foo(struct AB *ab)\n"
"{\n"
" ab->a = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
checkStructMemberUsage("struct AB\n"
"{\n"
" int a;\n"
" int b;\n"
"};\n"
"\n"
"void foo(struct AB _shuge *ab)\n"
"{\n"
" ab->a = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void structmember8()
{
checkStructMemberUsage("struct AB\n"
"{\n"
" int a;\n"
" int b;\n"
"};\n"
"\n"
"void foo(char *ab)\n"
"{\n"
" ((AB *)ab)->b = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void structmember_extern()
{
// extern struct => no false positive
checkStructMemberUsage("extern struct AB\n"
"{\n"
" int a;\n"
" int b;\n"
"} ab;\n"
"\n"
"void foo()\n"
"{\n"
" ab.b = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
// global linkage => no false positive
checkStructMemberUsage("struct AB\n"
"{\n"
" int a;\n"
" int b;\n"
"} ab;\n"
"\n"
"void foo()\n"
"{\n"
" ab.b = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
// static linkage => error message
checkStructMemberUsage("static struct AB\n"
"{\n"
" int a;\n"
" int b;\n"
"} ab;\n"
"\n"
"void foo()\n"
"{\n"
" ab.b = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) struct or union member 'AB::a' is never used\n", errout.str());
}
void functionVariableUsage(const char code[])
{
// Tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
// Clear the error buffer..
errout.str("");
tokenizer.tokenize(istr, "test.cpp");
// Check for unused variables..
Settings settings;
settings._checkCodingStyle = true;
CheckOther checkOther(&tokenizer, &settings, this);
checkOther.functionVariableUsage();
}
void localvar1()
{
functionVariableUsage("void foo()\n"
"{\n"
" int i = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int i(0);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
// if a is undefined then Cppcheck can't determine if "int i(a)" is a
// * variable declaration
// * function declaration
functionVariableUsage("void foo()\n"
"{\n"
" int i(a);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int j = 0;\n"
" int i(j);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int j = 0;\n"
" int & i = j;\n"
" j = j;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int j = 0;\n"
" const int & i = j;\n"
" j = j;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int j = 0;\n"
" int & i(j);\n"
" j = j;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int j = 0;\n"
" const int & i(j);\n"
" j = j;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int * j = 0;\n"
" int * i(j);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int * j = 0;\n"
" const int * i(j);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" bool i = false;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" bool i = true;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" char *i;\n"
" i = fgets();\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
// undefined variables are not reported because they may be classes with constructors
functionVariableUsage("undefined foo()\n"
"{\n"
" undefined i = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int i = undefined;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int * i = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" void * i = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" const void * i = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" struct S * i = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" const struct S * i = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" struct S & i = j;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" const struct S & i = j;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" undefined * i = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int i = 0;\n"
" int j = i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'j' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int i[10] = { 0 };\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo(int n)\n"
"{\n"
" int i[n] = { 0 };\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" char i[10] = \"123456789\";\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" char *i = \"123456789\";\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
}
void localvar2()
{
functionVariableUsage("int foo()\n"
"{\n"
" int i;\n"
" return i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is not assigned a value\n", errout.str());
functionVariableUsage("bool foo()\n"
"{\n"
" bool i;\n"
" return i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is not assigned a value\n", errout.str());
// undefined variables are not reported because they may be classes with constructors
functionVariableUsage("undefined foo()\n"
"{\n"
" undefined i;\n"
" return i;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("undefined *foo()\n"
"{\n"
" undefined * i;\n"
" return i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is not assigned a value\n", errout.str());
functionVariableUsage("int *foo()\n"
"{\n"
" int * i;\n"
" return i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is not assigned a value\n", errout.str());
functionVariableUsage("const int *foo()\n"
"{\n"
" const int * i;\n"
" return i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is not assigned a value\n", errout.str());
functionVariableUsage("struct S *foo()\n"
"{\n"
" struct S * i;\n"
" return i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is not assigned a value\n", errout.str());
functionVariableUsage("const struct S *foo()\n"
"{\n"
" const struct S * i;\n"
" return i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is not assigned a value\n", errout.str());
// assume f() can write a
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" f(a[0]);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
// assume f() can write a
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" f(a[0], 0);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
// assume f() can write a
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" f(0, a[0]);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
// assume f() can write a
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" f(0, a[0], 0);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
// f() can not write a (not supported yet)
functionVariableUsage("void f(int i) { }\n"
"void foo()\n"
"{\n"
" int a[10];\n"
" f(a[0]);\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'a' is not assigned a value\n", errout.str());
// f() can not write a (not supported yet)
functionVariableUsage("void f(const int & i) { }\n"
"void foo()\n"
"{\n"
" int a[10];\n"
" f(a[0]);\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'a' is not assigned a value\n", errout.str());
// f() writes a
functionVariableUsage("void f(int & i) { }\n"
"void foo()\n"
"{\n"
" int a[10];\n"
" f(a[0]);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvar3()
{
functionVariableUsage("void foo()\n"
"{\n"
" int i;\n"
" if ( abc )\n"
" ;\n"
" else i = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
}
void localvar4()
{
functionVariableUsage("void foo()\n"
"{\n"
" int i = 0;\n"
" f(i);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int i = 0;\n"
" f(&i);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvar5()
{
functionVariableUsage("void foo()\n"
"{\n"
" int a = 0;\n"
" b = (char)a;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvar6()
{
functionVariableUsage("void foo()\n"
"{\n"
" int b[10];\n"
" for (int i=0;i<10;++i)\n"
" b[i] = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'b' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a = 0;\n"
" int b[10];\n"
" for (int i=0;i<10;++i)\n"
" b[i] = ++a;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n", errout.str());
}
void localvar7()// ticket 1253
{
functionVariableUsage("void foo()\n"
"{\n"
" int i;\n"
" i--;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is not assigned a value\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int i;\n"
" int &ii(i);\n"
" ii--;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is not assigned a value\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int i;\n"
" int &ii=i;\n"
" ii--;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is not assigned a value\n", errout.str());
}
void localvar8()
{
functionVariableUsage("void foo()\n"
"{\n"
" int i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int i[2];\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" void * i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" const void * i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" A * i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" struct A * i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" const struct A * i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int * i[2];\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" const int * i[2];\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" void * i[2];\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" const void * i[2];\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" struct A * i[2];\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" const struct A * i[2];\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
functionVariableUsage("void foo(int n)\n"
"{\n"
" int i[n];\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int i = 0;\n"
" int &j = i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n"
"[test.cpp:4]: (style) Variable 'j' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int i;\n"
" int &j = i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n"
"[test.cpp:4]: (style) Variable 'j' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int i;\n"
" int &j = i;\n"
" j = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" A * i;\n"
" i->f();\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" char * i;\n"
" if (i);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" char * i = 0;\n"
" if (i);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" char * i = new char[10];\n"
" if (i);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" char *i;\n"
" f(i);\n"
"}\n");
functionVariableUsage("int a;\n"
"void foo()\n"
"{\n"
" return &a;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("int a[10];\n"
"void foo()\n"
"{\n"
" int *p = a;\n"
" for (int i = 0; i < 10; i++)\n"
" p[i] = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("int a[10];\n"
"void foo()\n"
"{\n"
" int *p = &a[0];\n"
" for (int i = 0; i < 10; i++)\n"
" p[i] = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" int x;\n"
" a[0] = 0;\n"
" x = a[0];\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'x' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a, b, c;\n"
" a = b = c = f();\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("int * foo()\n"
"{\n"
" return &undefined[0];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvar9()
{
// ticket #1605
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" for (int i = 0; i < 10; )\n"
" a[i++] = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
}
void localvar10()
{
functionVariableUsage("void foo(int x)\n"
"{\n"
" int i;\n"
" if (x) {\n"
" int i;\n"
" } else {\n"
" int i;\n"
" }\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n"
"[test.cpp:5]: (style) Unused variable: i\n"
"[test.cpp:7]: (style) Unused variable: i\n", errout.str());
functionVariableUsage("void foo(int x)\n"
"{\n"
" int i;\n"
" if (x)\n"
" int i;\n"
" else\n"
" int i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n"
"[test.cpp:5]: (style) Unused variable: i\n"
"[test.cpp:7]: (style) Unused variable: i\n", errout.str());
functionVariableUsage("void foo(int x)\n"
"{\n"
" int i;\n"
" if (x) {\n"
" int i;\n"
" } else {\n"
" int i = 0;\n"
" }\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n"
"[test.cpp:5]: (style) Unused variable: i\n"
"[test.cpp:7]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo(int x)\n"
"{\n"
" int i;\n"
" if (x) {\n"
" int i;\n"
" } else {\n"
" int i;\n"
" }\n"
" i = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n"
"[test.cpp:5]: (style) Unused variable: i\n"
"[test.cpp:7]: (style) Unused variable: i\n", errout.str());
}
void localvar11()
{
functionVariableUsage("void foo(int x)\n"
"{\n"
" int a = 0;\n"
" if (x == 1)\n"
" {\n"
" a = 123;\n" // redundant assignment
" return;\n"
" }\n"
" x = a;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
// The variable 'a' is initialized. But the initialized value is
// never used. It is only initialized for security reasons.
functionVariableUsage("void foo(int x)\n"
"{\n"
" int a = 0;\n"
" if (x == 1)\n"
" a = 123;\n"
" else if (x == 2)\n"
" a = 456;\n"
" else\n"
" return;\n"
" x = a;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvar12()
{
// ticket #1574
functionVariableUsage("void foo()\n"
"{\n"
" int a, b, c, d, e, f;\n"
" a = b = c = d = e = f = 0;\n"
"\n"
"}\n");
ASSERT_EQUALS(
"[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n"
"[test.cpp:3]: (style) Variable 'b' is assigned a value that is never used\n"
"[test.cpp:3]: (style) Variable 'c' is assigned a value that is never used\n"
"[test.cpp:3]: (style) Variable 'd' is assigned a value that is never used\n"
"[test.cpp:3]: (style) Variable 'e' is assigned a value that is never used\n"
"[test.cpp:3]: (style) Variable 'f' is assigned a value that is never used\n",
errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a, b, c = 0;\n"
" a = b = c;\n"
"\n"
"}\n");
ASSERT_EQUALS(
"[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n"
"[test.cpp:3]: (style) Variable 'b' is assigned a value that is never used\n",
errout.str());
TODO_ASSERT_EQUALS(
"[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n"
"[test.cpp:3]: (style) Variable 'b' is assigned a value that is never used\n"
"[test.cpp:3]: (style) Variable 'c' is assigned a value that is never used\n",
errout.str());
}
void localvar13() // ticket #1640
{
functionVariableUsage("void foo( OBJECT *obj )\n"
"{\n"
" int x;\n"
" x = obj->ySize / 8;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'x' is assigned a value that is never used\n", errout.str());
}
void localvar14()
{
// ticket #5
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: a\n", errout.str());
}
void localvar15()
{
functionVariableUsage("int foo()\n"
"{\n"
" int a = 5;\n"
" int b[a];\n"
" b[0] = 0;\n"
" return b[0];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("int foo()\n"
"{\n"
" int a = 5;\n"
" int * b[a];\n"
" b[0] = &c;\n"
" return *b[0];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("int * foo()\n"
"{\n"
" int a = 5;\n"
" const int * b[a];\n"
" b[0] = &c;\n"
" return b[0];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("struct B * foo()\n"
"{\n"
" int a = 5;\n"
" struct B * b[a];\n"
" b[0] = &c;\n"
" return b[0];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("const struct B * foo()\n"
"{\n"
" int a = 5;\n"
" const struct B * b[a];\n"
" b[0] = &c;\n"
" return b[0];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvar16() // ticket #1709
{
functionVariableUsage("int foo()\n"
"{\n"
" char buf[5];\n"
" char *ptr = buf;\n"
" *(ptr++) = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("int foo()\n"
"{\n"
" char buf[5];\n"
" char *ptr = buf - 1;\n"
" *(++ptr) = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvar17() // ticket #1720
{
// Don't crash when checking the code below!
functionVariableUsage("void foo()\n"
"{\n"
" struct DATA *data;\n"
" char *k = data->req;\n"
" char *ptr;\n"
" char *line_start;\n"
" ptr = data->buffer;\n"
" line_start = ptr;\n"
" data->info = k;\n"
" line_start = ptr;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:6]: (style) Variable 'line_start' is assigned a value that is never used\n", errout.str());
}
void localvar18() // ticket #1723
{
functionVariableUsage("A::A(int iValue) {\n"
" UserDefinedException* pe = new UserDefinedException();\n"
" throw pe;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvar19() // ticket #1776
{
functionVariableUsage("void foo() {\n"
" int a[10];\n"
" int c;\n"
" c = *(a);\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style) Variable 'a' is not assigned a value\n"
"[test.cpp:3]: (style) Variable 'c' is assigned a value that is never used\n", errout.str());
}
void localvar20() // ticket #1799
{
functionVariableUsage("void foo()\n"
"{\n"
" char c1 = 'c';\n"
" char c2[] = { c1 };\n"
" a(c2);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void localvar21() // ticket #1807
{
functionVariableUsage("void foo()\n"
"{\n"
" char buffer[1024];\n"
" bar((void *)buffer);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void localvar22() // ticket #1811
{
functionVariableUsage("int foo(int u, int v)\n"
"{\n"
" int h, i;\n"
" h = 0 ? u : v;\n"
" i = 1 ? u : v;\n"
" return h + i;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvar23() // ticket #1808
{
functionVariableUsage("int foo(int c)\n"
"{\n"
" int a;\n"
" int b[10];\n"
" a = b[c] = 0;\n"
" return a;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void localvar24() // ticket #1803
{
functionVariableUsage("class MyException\n"
"{\n"
" virtual void raise() const\n"
" {\n"
" throw *this;\n"
" }\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvar25() // ticket #1729
{
functionVariableUsage("int main() {\n"
" int ppos = 1;\n"
" int pneg = 0;\n"
" const char*edge = ppos? \" +\" : pneg ? \" -\" : \"\";\n"
" printf(\"This should be a '+' -> %s\n\", edge);\n"
" return 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvaralias1()
{
functionVariableUsage("void foo()\n"
"{\n"
" int a;\n"
" int *b = &a;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: a\n"
"[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" int *b = a;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a;\n"
" int *b = &a;\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a;\n"
" char *b = (char *)&a;\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a;\n"
" char *b = (char *)(&a);\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a;\n"
" const char *b = (const char *)&a;\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a;\n"
" const char *b = (const char *)(&a);\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a;\n"
" char *b = static_cast<char *>(&a);\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a;\n"
" const char *b = static_cast<const char *>(&a);\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
// a is not a local variable and b is aliased to it
functionVariableUsage("int a;\n"
"void foo()\n"
"{\n"
" int *b = &a;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n", errout.str());
// a is not a local variable and b is aliased to it
functionVariableUsage("void foo(int a)\n"
"{\n"
" int *b = &a;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'b' is assigned a value that is never used\n", errout.str());
// a is not a local variable and b is aliased to it
functionVariableUsage("class A\n"
"{\n"
" int a;\n"
" void foo()\n"
" {\n"
" int *b = &a;\n"
" }\n"
"}\n");
ASSERT_EQUALS("[test.cpp:6]: (style) Variable 'b' is assigned a value that is never used\n", errout.str());
functionVariableUsage("int a;\n"
"void foo()\n"
"{\n"
" int *b = &a;\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo(int a)\n"
"{\n"
" int *b = &a;\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("class A\n"
"{\n"
" int a;\n"
" void foo()\n"
" {\n"
" int *b = &a;\n"
" *b = 0;\n"
" }\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" int *b = a;\n"
" *b = 0;\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" char *b = (char *)a;\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" char *b = (char *)(a);\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" const char *b = (const char *)a;\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" const char *b = (const char *)(a);\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" char *b = static_cast<char *>(a);\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" const char *b = static_cast<const char *>(a);\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("int a[10];\n"
"void foo()\n"
"{\n"
" int *b = a;\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("int a[10];\n"
"void foo()\n"
"{\n"
" int *b = a;\n"
" int *c = b;\n"
" *c = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int *b = a;\n"
" int *c = b;\n"
" *c = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int *b = a;\n"
" int *c = b;\n"
" *c = b[0];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int *b = a;\n"
" int *c;\n"
" *c = b[0];\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'c' is not assigned a value\n", errout.str());
functionVariableUsage("int a[10];\n"
"void foo()\n"
"{\n"
" int *b = a;\n"
" int c = b[0];\n"
" c = c;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int *b = a;\n"
" int c = b[0];\n"
" c = c;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("int a[10];\n"
"void foo()\n"
"{\n"
" int *b = &a[0];\n"
" a[0] = b[0];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int *b = &a[0];\n"
" a[0] = b[0];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int *b = a;\n"
" a[0] = b[0];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo(int a[10])\n"
"{\n"
" int *b = a;\n"
" *b = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("class A\n"
"{\n"
" int a[10];\n"
" void foo()\n"
" {\n"
" int *b = a;\n"
" *b = 0;\n"
" }\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" int *b = a;\n"
" int *c = b;\n"
" *c = 0;\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" int b[10];\n"
" int *c = a;\n"
" int *d = b;\n"
" *d = 0;\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: a\n"
"[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n"
"[test.cpp:5]: (style) Variable 'c' is assigned a value that is never used\n", errout.str());
ASSERT_EQUALS("[test.cpp:5]: (style) Variable 'c' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" int b[10];\n"
" int *c = a;\n"
" c = b;\n"
" *c = 0;\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: a\n"
"[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n", errout.str());
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10];\n"
" int b[10];\n"
" int *c = a;\n"
" c = b;\n"
" *c = 0;\n"
" c = a;\n"
" *c = 0;\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n"
"[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n", errout.str());
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10], * b = a + 10;\n"
" b[-10] = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10], * b = a + 10;\n"
" b[-10] = 0;\n"
" int * c = b - 10;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n"
"[test.cpp:5]: (style) Variable 'c' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10], * b = a + 10;\n"
" int * c = b - 10;\n"
" x = c[0];\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is not assigned a value\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10], * b = a + 10;\n"
" int * c = b - 10;\n"
" c[1] = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10], * b = a + 10;\n"
" int * c = b - 10;\n"
" c[1] = c[0];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" int a[10], * b = a + 10;\n"
" int * c = b - 10;\n"
" int d = c[0];\n"
" f(d);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is not assigned a value\n", errout.str());
functionVariableUsage("struct S { char c[100]; };\n"
"void foo()\n"
"{\n"
" char a[100];\n"
" struct S * s = (struct S *)a;\n"
" s->c[0] = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("struct S { char c[100]; };\n"
"void foo()\n"
"{\n"
" char a[100];\n"
" struct S * s = (struct S *)a;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Unused variable: a\n"
"[test.cpp:5]: (style) Variable 's' is assigned a value that is never used\n", errout.str());
functionVariableUsage("struct S { char c[100]; };\n"
"void foo()\n"
"{\n"
" char a[100];\n"
" const struct S * s = (const struct S *)a;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Unused variable: a\n"
"[test.cpp:5]: (style) Variable 's' is assigned a value that is never used\n", errout.str());
functionVariableUsage("struct S { char c[100]; };\n"
"void foo()\n"
"{\n"
" char a[100];\n"
" struct S * s = static_cast<struct S *>(a);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Unused variable: a\n"
"[test.cpp:5]: (style) Variable 's' is assigned a value that is never used\n", errout.str());
functionVariableUsage("struct S { char c[100]; };\n"
"void foo()\n"
"{\n"
" char a[100];\n"
" const struct S * s = static_cast<const struct S *>(a);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Unused variable: a\n"
"[test.cpp:5]: (style) Variable 's' is assigned a value that is never used\n", errout.str());
functionVariableUsage("int a[10];\n"
"void foo()\n"
"{\n"
" int b[10];\n"
" int c[10];\n"
" int *d;\n"
" d = b;\n"
" d = a;\n"
" d = c;\n"
" *d = 0;\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:5]: (style) Variable 'c' is assigned a value that is never used\n", errout.str());
ASSERT_EQUALS("", errout.str());
functionVariableUsage("int a[10];\n"
"void foo()\n"
"{\n"
" int b[10];\n"
" int c[10];\n"
" int *d;\n"
" d = b; *d = 0;\n"
" d = a; *d = 0;\n"
" d = c; *d = 0;\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n"
"[test.cpp:5]: (style) Variable 'c' is assigned a value that is never used\n", errout.str());
ASSERT_EQUALS("", errout.str());
}
void localvaralias2() // ticket 1637
{
functionVariableUsage("void foo()\n"
"{\n"
" int * a;\n"
" a = a;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvaralias3() // ticket 1639
{
functionVariableUsage("void foo()\n"
"{\n"
" BROWSEINFO info;\n"
" char szDisplayName[MAX_PATH];\n"
" info.pszDisplayName = szDisplayName;\n"
" SHBrowseForFolder(&info);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvaralias4() // ticket 1643
{
functionVariableUsage("struct AB { int a; int b; } ab;\n"
"void foo()\n"
"{\n"
" int * a = &ab.a;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("struct AB { int a; int b; } ab;\n"
"void foo()\n"
"{\n"
" int * a = &ab.a;\n"
" *a = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("struct AB { int a; int b; };\n"
"void foo()\n"
"{\n"
" struct AB ab;\n"
" int * a = &ab.a;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:5]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
functionVariableUsage("struct AB { int a; int b; };\n"
"void foo()\n"
"{\n"
" struct AB ab;\n"
" int * a = &ab.a;\n"
" *a = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvaralias5() // ticket 1647
{
functionVariableUsage("char foo()\n"
"{\n"
" char buf[8];\n"
" char *p = &buf[0];\n"
" *p++ = 0;\n"
" return buf[0];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("char foo()\n"
"{\n"
" char buf[8];\n"
" char *p = &buf[1];\n"
" *p-- = 0;\n"
" return buf[0];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("char foo()\n"
"{\n"
" char buf[8];\n"
" char *p = &buf[0];\n"
" *++p = 0;\n"
" return buf[0];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("char foo()\n"
"{\n"
" char buf[8];\n"
" char *p = &buf[1];\n"
" *--p = 0;\n"
" return buf[0];\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvaralias6() // ticket 1729
{
functionVariableUsage("void foo()\n"
"{\n"
" char buf[8];\n"
" char *srcdata;\n"
" if (a()) {\n"
" buf[0] = 1;\n"
" srcdata = buf;\n"
" } else {\n"
" srcdata = vdata;\n"
" }\n"
" b(srcdata);\n"
"}");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" char buf[8];\n"
" char *srcdata;\n"
" if (a()) {\n"
" buf[0] = 1;\n"
" srcdata = buf;\n"
" srcdata = vdata;\n"
" }\n"
" b(srcdata);\n"
"}");
TODO_ASSERT_EQUALS(std::string("[test.cpp:3]: (style) Variable 'buf' is assigned a value that is never used\n"), errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" char buf[8];\n"
" char *srcdata;\n"
" if (a()) {\n"
" buf[0] = 1;\n"
" srcdata = buf;\n"
" }\n"
" srcdata = vdata;\n"
" b(srcdata);\n"
"}");
TODO_ASSERT_EQUALS(std::string("[test.cpp:3]: (style) Variable 'buf' is assigned a value that is never used\n"), errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" char buf[8];\n"
" char *srcdata;\n"
" if (a()) {\n"
" srcdata = buf;\n"
" }\n"
" srcdata = vdata;\n"
" b(srcdata);\n"
"}");
TODO_ASSERT_EQUALS(std::string("[test.cpp:3]: (style) Unused variable: buf\n"), errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" char buf[8];\n"
" char *srcdata;\n"
" if (a()) {\n"
" srcdata = vdata;\n"
" }\n"
" srcdata = buf;\n"
" b(srcdata);\n"
"}");
ASSERT_EQUALS(std::string(""), errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" char buf[8];\n"
" char *srcdata;\n"
" char vdata[8];\n"
" if (a()) {\n"
" buf[0] = 1;\n"
" srcdata = buf;\n"
" } else {\n"
" srcdata = vdata;\n"
" }\n"
" b(srcdata);\n"
"}");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" char buf[8];\n"
" char *srcdata;\n"
" char vdata[8];\n"
" if (a()) {\n"
" buf[0] = 1;\n"
" srcdata = buf;\n"
" srcdata = vdata;\n"
" }\n"
" b(srcdata);\n"
"}");
TODO_ASSERT_EQUALS(std::string("[test.cpp:3]: (style) Variable 'buf' is assigned a value that is never used\n"), errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" char buf[8];\n"
" char *srcdata;\n"
" char vdata[8];\n"
" if (a()) {\n"
" buf[0] = 1;\n"
" srcdata = buf;\n"
" }\n"
" srcdata = vdata;\n"
" b(srcdata);\n"
"}");
TODO_ASSERT_EQUALS(std::string("[test.cpp:3]: (style) Variable 'buf' is assigned a value that is never used\n"), errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" char buf[8];\n"
" char *srcdata;\n"
" char vdata[8];\n"
" if (a()) {\n"
" srcdata = buf;\n"
" }\n"
" srcdata = vdata;\n"
" b(srcdata);\n"
"}");
TODO_ASSERT_EQUALS(std::string("[test.cpp:3]: (style) Unused variable: buf\n"), errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" char buf[8];\n"
" char *srcdata;\n"
" char vdata[8];\n"
" if (a()) {\n"
" srcdata = vdata;\n"
" }\n"
" srcdata = buf;\n"
" b(srcdata);\n"
"}");
TODO_ASSERT_EQUALS(std::string("[test.cpp:5]: (style) Unused variable: vdata\n"), errout.str());
}
void localvaralias7() // ticket 1732
{
functionVariableUsage("void foo()\n"
"{\n"
" char *c[10];\n"
" char **cp;\n"
" cp = c;\n"
" *cp = 0;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void localvarasm()
{
functionVariableUsage("void foo(int &b)\n"
"{\n"
" int a;\n"
" asm();\n"
" b = a;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvarStruct1()
{
functionVariableUsage("void foo()\n"
"{\n"
" static const struct{ int x, y, w, h; } bounds = {1,2,3,4};\n"
" return bounds.x + bounds.y + bounds.w + bounds.h;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvarStruct2()
{
functionVariableUsage("void foo()\n"
"{\n"
" struct ABC { int a, b, c; };\n"
" struct ABC abc = { 1, 2, 3 };\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvarStruct3()
{
functionVariableUsage("void foo()\n"
"{\n"
" int a = 10;\n"
" union { struct { unsigned char x; }; unsigned char z; };\n"
" do {\n"
" func();\n"
" } while(a--);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Unused variable: z\n", errout.str());
}
void localvarStruct4()
{
/* This must not SIGSEGV: */
// FIXME!!
//functionVariableUsage("void foo()\n"
// "{\n"
// " struct { \n");
}
void localvarOp()
{
const char op[] = "+-*/%&|^";
for (const char *p = op; *p; ++p)
{
std::string code("int main()\n"
"{\n"
" int tmp = 10;\n"
" return 123 " + std::string(1, *p) + " tmp;\n"
"}\n");
functionVariableUsage(code.c_str());
ASSERT_EQUALS("", errout.str());
}
}
void localvarInvert()
{
functionVariableUsage("int main()\n"
"{\n"
" int tmp = 10;\n"
" return ~tmp;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvarIf()
{
functionVariableUsage("int main()\n"
"{\n"
" int tmp = 10;\n"
" if ( tmp )\n"
" return 1;\n"
" return 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvarIfElse()
{
functionVariableUsage("int foo()\n"
"{\n"
" int tmp1 = 1;\n"
" int tmp2 = 2;\n"
" int tmp3 = 3;\n"
" return tmp1 ? tmp2 : tmp3;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvarOpAssign()
{
functionVariableUsage("void foo()\n"
"{\n"
" int a = 1;\n"
" int b = 2;\n"
" a |= b;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'a' is assigned a value that is never used\n", errout.str());
}
void localvarFor()
{
functionVariableUsage("void foo()\n"
"{\n"
" int a = 1;\n"
" for (;a;);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvarShift()
{
functionVariableUsage("int foo()\n"
"{\n"
" int var = 1;\n"
" return 1 >> var;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvarCast()
{
functionVariableUsage("int foo()\n"
"{\n"
" int a = 1;\n"
" int b = static_cast<int>(a);\n"
" return b;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvarClass()
{
functionVariableUsage("int foo()\n"
"{\n"
" class B : public A {\n"
" int a;\n"
" int f() { return a; }\n"
" } b;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvarUnused()
{
functionVariableUsage("int foo()\n"
"{\n"
" bool test __attribute__((unused));\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("int foo()\n"
"{\n"
" bool test __attribute__((unused)) = true;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("int foo()\n"
"{\n"
" bool __attribute__((unused)) test;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("int foo()\n"
"{\n"
" bool __attribute__((unused)) test = true;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void localvarFunction()
{
functionVariableUsage("void check_dlsym(void*& h)\n"
"{\n"
" typedef void (*function_type) (void);\n"
" function_type fn;\n"
" fn = reinterpret_cast<function_type>(dlsym(h, \"try_allocation\"));\n"
" fn();\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void localvarstatic()
{
functionVariableUsage("void foo()\n"
"{\n"
" static int i;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" static int i = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" static int i(0);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
// If "a" is undefined then Cppcheck can't determine whether
// "static int i(a);" is a variable declaration or a function
// declaration.
functionVariableUsage("void foo()\n"
"{\n"
" static int i(a);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void foo()\n"
"{\n"
" static int j = 0;\n"
" static int i(j);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
functionVariableUsage("int * foo(int x)\n"
"{\n"
" static int a[] = { 3, 4, 5, 6 };\n"
" static int b[] = { 4, 5, 6, 7 };\n"
" static int c[] = { 5, 6, 7, 8 };\n"
" b[1] = 1;\n"
" return x ? a : c;\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'b' is assigned a value that is never used\n", errout.str());
}
};
REGISTER_TEST(TestUnusedVar)
