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stl: checking that iterator is used against a single container

This commit is contained in:
Daniel Marjamäki 2009-04-29 20:16:04 +02:00
parent 2a200cff00
commit ad4c7993d1
2 changed files with 34 additions and 30 deletions
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40
src/checkstl.cpp
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@ -40,30 +40,28 @@ void CheckStl::iterators()
{
for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next())
{
// it = foo.begin(); it != bar.end()
if (Token::Match(tok, "%var% = %var% . begin ( ) ; %var% != %var% . end ( ) ;"))
if (Token::Match(tok, "%var% = %var% . begin ( ) ;"))
{
// Different iterators..
if (tok->str() != tok->tokAt(8)->str())
continue;
// Same container..
if (tok->tokAt(2)->str() == tok->tokAt(10)->str())
continue;
iteratorsError(tok, tok->strAt(2), tok->strAt(10));
}
// it = foo.begin();
// while (it != bar.end())
if (Token::Match(tok, "%var% = %var% . begin ( ) ; while ( %var% != %var% . end ( )"))
{
// Different iterators..
if (tok->str() != tok->tokAt(10)->str())
continue;
// Same container..
if (tok->tokAt(2)->str() == tok->tokAt(12)->str())
const unsigned int iteratorId(tok->varId());
const unsigned int containerId(tok->tokAt(2)->varId());
if (iteratorId == 0 || containerId == 0)
continue;
iteratorsError(tok, tok->strAt(2), tok->strAt(12));
for (const Token *tok2 = tok->tokAt(6); tok2; tok2 = tok2->next())
{
if (tok2->str() == "}")
break;
if (tok2->varId() == iteratorId)
{
if (Token::Match(tok2->next(), "!= %var% . end ( )") && tok2->tokAt(2)->varId() != containerId)
iteratorsError(tok2, tok->strAt(2), tok2->strAt(2));
}
else if (Token::Match(tok2, "%var% . insert|erase ( %varid%", iteratorId))
{
if (tok2->varId() != containerId)
iteratorsError(tok2, tok->strAt(2), tok2->str());
}
}
}
}
}

24
test/teststl.cpp
View File

@ -76,35 +76,41 @@ private:
void iterator1()
{
check("void foo()\n"
check("void f()\n"
"{\n"
" for (it = foo.begin(); it != bar.end(); ++it)\n"
" list<int> l1;\n"
" list<int> l2;\n"
" for (list<int>::iterator it = l1.begin(); it != l2.end(); ++it)\n"
" { }\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (error) Same iterator is used with both foo and bar\n", errout.str());
ASSERT_EQUALS("[test.cpp:5]: (error) Same iterator is used with both l1 and l2\n", errout.str());
}
void iterator2()
{
check("void foo()\n"
"{\n"
" it = foo.begin();\n"
" while (it != bar.end())\n"
" list<int> l1;\n"
" list<int> l2;\n"
" list<int>::iterator it = l1.begin();\n"
" while (it != l2.end())\n"
" {\n"
" ++it;\n"
" }\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (error) Same iterator is used with both foo and bar\n", errout.str());
ASSERT_EQUALS("[test.cpp:6]: (error) Same iterator is used with both l1 and l2\n", errout.str());
}
void iterator3()
{
check("void foo()\n"
"{\n"
" i = l1.begin();\n"
" l2.insert(i, 0);\n"
" list<int> l1;\n"
" list<int> l2;\n"
" list<int>::iterator it = l1.begin();\n"
" l2.insert(it, 0);\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:4]: (error) Same iterator is used with both foo and bar\n", errout.str());
ASSERT_EQUALS("[test.cpp:6]: (error) Same iterator is used with both l1 and l2\n", errout.str());
}