1956 lines
78 KiB
C++
1956 lines
78 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2010 Daniel Marjamäki and Cppcheck team.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// Check for unused variables..
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#include "testsuite.h"
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#include "tokenize.h"
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#include "checkother.h"
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#include <sstream>
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extern std::ostringstream errout;
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class TestUnusedVar : public TestFixture
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{
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public:
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TestUnusedVar() : TestFixture("TestUnusedVar")
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{ }
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private:
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void check(const char code[])
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{
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// Tokenize..
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Tokenizer tokenizer;
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std::istringstream istr(code);
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tokenizer.tokenize(istr, "test.cpp");
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// Clear the error buffer..
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errout.str("");
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// Check for unused variables..
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Settings settings;
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settings._checkCodingStyle = true;
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CheckOther checkOther(&tokenizer, &settings, this);
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checkOther.checkStructMemberUsage();
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}
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void run()
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{
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TEST_CASE(structmember1);
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TEST_CASE(structmember2);
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TEST_CASE(structmember3);
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TEST_CASE(structmember4);
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TEST_CASE(structmember5);
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TEST_CASE(structmember6);
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TEST_CASE(structmember7);
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TEST_CASE(structmember8);
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TEST_CASE(structmember_extern); // No false positives for extern structs
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TEST_CASE(localvar1);
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TEST_CASE(localvar2);
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TEST_CASE(localvar3);
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TEST_CASE(localvar4);
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TEST_CASE(localvar5);
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TEST_CASE(localvar6);
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TEST_CASE(localvar7);
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TEST_CASE(localvar8);
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TEST_CASE(localvar9); // ticket #1605
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TEST_CASE(localvar10);
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TEST_CASE(localvar11);
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TEST_CASE(localvar12);
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TEST_CASE(localvar13); // ticket #1640
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TEST_CASE(localvar14); // ticket #5
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TEST_CASE(localvar15);
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TEST_CASE(localvar16); // ticket #1709
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TEST_CASE(localvar17); // ticket #1720
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TEST_CASE(localvar18); // ticket #1723
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TEST_CASE(localvar19); // ticket #1776
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TEST_CASE(localvaralias1);
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TEST_CASE(localvaralias2); // ticket #1637
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TEST_CASE(localvaralias3); // ticket #1639
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TEST_CASE(localvaralias4); // ticket #1643
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TEST_CASE(localvaralias5); // ticket #1647
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TEST_CASE(localvaralias6); // ticket #1729
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TEST_CASE(localvarasm);
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// Don't give false positives for variables in structs/unions
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TEST_CASE(localvarStruct1);
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TEST_CASE(localvarStruct2);
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TEST_CASE(localvarStruct3);
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TEST_CASE(localvarStruct4); // Ticket #31: sigsegv on incomplete struct
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TEST_CASE(localvarOp); // Usage with arithmetic operators
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TEST_CASE(localvarInvert); // Usage with inverted variable
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TEST_CASE(localvarIf); // Usage in if
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TEST_CASE(localvarIfElse); // return tmp1 ? tmp2 : tmp3;
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TEST_CASE(localvarOpAssign); // a |= b;
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TEST_CASE(localvarFor); // for ( ; var; )
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TEST_CASE(localvarShift); // 1 >> var
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TEST_CASE(localvarCast);
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TEST_CASE(localvarClass);
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TEST_CASE(localvarUnused);
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}
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void structmember1()
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{
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check("struct abc\n"
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"{\n"
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" int a;\n"
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" int b;\n"
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" int c;\n"
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"};\n");
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ASSERT_EQUALS(std::string("[test.cpp:3]: (style) struct or union member 'abc::a' is never used\n"
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"[test.cpp:4]: (style) struct or union member 'abc::b' is never used\n"
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"[test.cpp:5]: (style) struct or union member 'abc::c' is never used\n"), errout.str());
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}
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void structmember2()
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{
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check("struct ABC\n"
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"{\n"
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" int a;\n"
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" int b;\n"
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" int c;\n"
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"};\n"
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"\n"
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"void foo()\n"
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"{\n"
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" struct ABC abc;\n"
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" int a = abc.a;\n"
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" int b = abc.b;\n"
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" int c = abc.c;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void structmember3()
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{
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check("struct ABC\n"
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"{\n"
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" int a;\n"
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" int b;\n"
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" int c;\n"
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"};\n"
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"\n"
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"static struct ABC abc[] = { {1, 2, 3} };\n"
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"\n"
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"void foo()\n"
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"{\n"
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" int a = abc[0].a;\n"
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" int b = abc[0].b;\n"
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" int c = abc[0].c;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void structmember4()
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{
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check("struct ABC\n"
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"{\n"
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" const int a;\n"
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"};\n"
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"\n"
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"void foo()\n"
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"{\n"
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" ABC abc;\n"
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" if (abc.a == 2);\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void structmember5()
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{
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check("struct AB\n"
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"{\n"
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" int a;\n"
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" int b;\n"
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" void reset()\n"
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" {\n"
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" a = 1;\n"
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" b = 2;\n"
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" }\n"
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"};\n"
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"\n"
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"void foo()\n"
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"{\n"
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" struct AB ab;\n"
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" ab.reset();\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void structmember6()
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{
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check("struct AB\n"
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"{\n"
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" int a;\n"
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" int b;\n"
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"};\n"
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"\n"
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"void foo(char *buf)\n"
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"{\n"
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" struct AB *ab = (struct AB *)&buf[10];\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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check("struct AB\n"
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"{\n"
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" int a;\n"
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" int b;\n"
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"};\n"
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"\n"
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"void foo(char *buf)\n"
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"{\n"
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" struct AB *ab = (AB *)&buf[10];\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void structmember7()
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{
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check("struct AB\n"
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"{\n"
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" int a;\n"
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" int b;\n"
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"};\n"
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"\n"
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"void foo(struct AB *ab)\n"
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"{\n"
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" ab->a = 0;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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check("struct AB\n"
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"{\n"
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" int a;\n"
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" int b;\n"
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"};\n"
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"\n"
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"void foo(struct AB _shuge *ab)\n"
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"{\n"
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" ab->a = 0;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void structmember8()
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{
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check("struct AB\n"
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"{\n"
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" int a;\n"
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" int b;\n"
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"};\n"
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"\n"
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"void foo(char *ab)\n"
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"{\n"
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" ((AB *)ab)->b = 0;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void structmember_extern()
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{
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// extern struct => no false positive
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check("extern struct AB\n"
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"{\n"
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" int a;\n"
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" int b;\n"
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"} ab;\n"
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"\n"
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"void foo()\n"
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"{\n"
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" ab.b = 0;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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// global linkage => no false positive
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check("struct AB\n"
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"{\n"
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" int a;\n"
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" int b;\n"
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"} ab;\n"
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"\n"
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"void foo()\n"
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"{\n"
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" ab.b = 0;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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// static linkage => error message
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check("static struct AB\n"
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"{\n"
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" int a;\n"
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" int b;\n"
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"} ab;\n"
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"\n"
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"void foo()\n"
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"{\n"
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" ab.b = 0;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) struct or union member 'AB::a' is never used\n", errout.str());
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}
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void functionVariableUsage(const char code[])
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{
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// Tokenize..
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Tokenizer tokenizer;
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std::istringstream istr(code);
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tokenizer.tokenize(istr, "test.cpp");
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// Clear the error buffer..
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errout.str("");
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// Check for unused variables..
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Settings settings;
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settings._checkCodingStyle = true;
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CheckOther checkOther(&tokenizer, &settings, this);
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checkOther.functionVariableUsage();
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}
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void localvar1()
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{
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functionVariableUsage("void foo()\n"
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"{\n"
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" int i = 0;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" int i(0);\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" int i(a);\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" int j = 0;\n"
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" int i(j);\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" int j = 0;\n"
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" int & i = j;\n"
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" j = j;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" int j = 0;\n"
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" const int & i = j;\n"
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" j = j;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" int j = 0;\n"
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" int & i(j);\n"
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" j = j;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" int j = 0;\n"
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" const int & i(j);\n"
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" j = j;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" int * j = 0;\n"
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" int * i(j);\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" int * j = 0;\n"
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" const int * i(j);\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" bool i = false;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" bool i = true;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" char *i;\n"
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" i = fgets();\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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// undefined variables are not reported because they may be classes with constructors
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functionVariableUsage("undefined foo()\n"
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"{\n"
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" undefined i = 0;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" int i = undefined;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" int * i = 0;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" void * i = 0;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" const void * i = 0;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" struct S * i = 0;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" const struct S * i = 0;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" struct S & i = j;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" const struct S & i = j;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" undefined * i = 0;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" int i = 0;\n"
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" int j = i;\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:4]: (style) Variable 'j' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" int i[10] = { 0 };\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo(int n)\n"
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"{\n"
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" int i[n] = { 0 };\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" char i[10] = \"123456789\";\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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functionVariableUsage("void foo()\n"
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"{\n"
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" char *i = \"123456789\";\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (style) Variable 'i' is assigned a value that is never used\n", errout.str());
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}
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void localvar2()
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{
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functionVariableUsage("int foo()\n"
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"{\n"
|
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" int i;\n"
|
|
" return i;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[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(std::string("[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(std::string(""), errout.str());
|
|
|
|
functionVariableUsage("undefined *foo()\n"
|
|
"{\n"
|
|
" undefined * i;\n"
|
|
" return i;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[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(std::string("[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(std::string("[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(std::string("[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(std::string("[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(std::string("[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(std::string(""), errout.str());
|
|
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" int i = 0;\n"
|
|
" f(&i);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
void localvar5()
|
|
{
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" int a = 0;\n"
|
|
" b = (char)a;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), 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(std::string("[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(std::string("[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(std::string("[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(std::string("[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(std::string("[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");
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
|
|
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" const int * i[2];\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
|
|
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" void * i[2];\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
|
|
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" const void * i[2];\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
|
|
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" struct A * i[2];\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) Unused variable: i\n", errout.str());
|
|
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" const struct A * i[2];\n"
|
|
"}\n");
|
|
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(std::string(""), errout.str());
|
|
}
|
|
|
|
void localvar19() // ticket #1776
|
|
{
|
|
functionVariableUsage("void foo() {\n"
|
|
" int a[10];\n"
|
|
" int c;\n"
|
|
" c = *(a);\n"
|
|
"}");
|
|
ASSERT_EQUALS(std::string("[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 localvaralias1()
|
|
{
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" int a;\n"
|
|
" int *b = &a;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[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(std::string("[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;\n"
|
|
" int *b = &a;\n"
|
|
" *b = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[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(std::string("[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(std::string("[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(std::string("[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(std::string("[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(std::string("[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(std::string("[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(std::string("[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(std::string("[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(std::string("[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(std::string(""), errout.str());
|
|
|
|
functionVariableUsage("void foo(int a)\n"
|
|
"{\n"
|
|
" int *b = &a;\n"
|
|
" *b = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), 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(std::string(""), errout.str());
|
|
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" int a[10];\n"
|
|
" int *b = a;\n"
|
|
" *b = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[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(std::string("[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(std::string("[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(std::string("[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(std::string("[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(std::string("[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(std::string("[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(std::string(""), 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(std::string(""), errout.str());
|
|
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" int *b = a;\n"
|
|
" int *c = b;\n"
|
|
" *c = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" int *b = a;\n"
|
|
" int *c = b;\n"
|
|
" *c = b[0];\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" int *b = a;\n"
|
|
" int *c;\n"
|
|
" *c = b[0];\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[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(std::string(""), errout.str());
|
|
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" int *b = a;\n"
|
|
" int c = b[0];\n"
|
|
" c = c;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
|
|
functionVariableUsage("int a[10];\n"
|
|
"void foo()\n"
|
|
"{\n"
|
|
" int *b = &a[0];\n"
|
|
" a[0] = b[0];\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" int *b = &a[0];\n"
|
|
" a[0] = b[0];\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" int *b = a;\n"
|
|
" a[0] = b[0];\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
|
|
functionVariableUsage("void foo(int a[10])\n"
|
|
"{\n"
|
|
" int *b = a;\n"
|
|
" *b = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), 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(std::string(""), errout.str());
|
|
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" int a[10];\n"
|
|
" int *b = a;\n"
|
|
" int *c = b;\n"
|
|
" *c = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[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"
|
|
" int b[10];\n"
|
|
" int *c = a;\n"
|
|
" int *d = b;\n"
|
|
" *d = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[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());
|
|
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" int a[10];\n"
|
|
" int b[10];\n"
|
|
" int *c = a;\n"
|
|
" c = b;\n"
|
|
" *c = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[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[10];\n"
|
|
" int *c = a;\n"
|
|
" c = b;\n"
|
|
" *c = 0;\n"
|
|
" c = a;\n"
|
|
" *c = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[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());
|
|
|
|
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");
|
|
ASSERT_EQUALS(std::string("[test.cpp:4]: (style) Unused variable: b\n"
|
|
"[test.cpp:5]: (style) Variable 'c' 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; *d = 0;\n"
|
|
" d = a; *d = 0;\n"
|
|
" d = c; *d = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[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());
|
|
}
|
|
|
|
void localvaralias2() // ticket 1637
|
|
{
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" int * a;\n"
|
|
" a = a;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), 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(std::string(""), 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(std::string("[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(std::string(""), 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(std::string("[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(std::string(""), 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(std::string(""), 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(std::string(""), 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(std::string(""), 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(std::string(""), 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"
|
|
"}");
|
|
TODO_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"
|
|
"}");
|
|
TODO_ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
void localvarasm()
|
|
{
|
|
functionVariableUsage("void foo(int &b)\n"
|
|
"{\n"
|
|
" int a;\n"
|
|
" asm();\n"
|
|
" b = a;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), 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(std::string(""), 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(std::string(""), 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(std::string("[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(std::string(""), errout.str());
|
|
}
|
|
}
|
|
|
|
void localvarInvert()
|
|
{
|
|
functionVariableUsage("int main()\n"
|
|
"{\n"
|
|
" int tmp = 10;\n"
|
|
" return ~tmp;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), 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(std::string(""), 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(std::string(""), errout.str());
|
|
}
|
|
|
|
void localvarOpAssign()
|
|
{
|
|
functionVariableUsage("void foo()\n"
|
|
"{\n"
|
|
" int a = 1;\n"
|
|
" int b = 2;\n"
|
|
" a |= b;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[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(std::string(""), errout.str());
|
|
}
|
|
|
|
void localvarShift()
|
|
{
|
|
functionVariableUsage("int foo()\n"
|
|
"{\n"
|
|
" int var = 1;\n"
|
|
" return 1 >> var;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), 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(std::string(""), 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(std::string(""), errout.str());
|
|
}
|
|
|
|
void localvarUnused()
|
|
{
|
|
functionVariableUsage("int foo()\n"
|
|
"{\n"
|
|
" bool test __attribute__((unused));\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
|
|
functionVariableUsage("int foo()\n"
|
|
"{\n"
|
|
" bool test __attribute__((unused)) = true;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
|
|
functionVariableUsage("int foo()\n"
|
|
"{\n"
|
|
" bool __attribute__((unused)) test;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
|
|
functionVariableUsage("int foo()\n"
|
|
"{\n"
|
|
" bool __attribute__((unused)) test = true;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
};
|
|
|
|
REGISTER_TEST(TestUnusedVar)
|
|
|
|
|