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Fixed false positive in CheckUnusedVar::checkFunctionVariableUsage(): Bailout when break; is encountered 

See also: https://sourceforge.net/p/cppcheck/discussion/general/thread/1c169dc5/
This commit is contained in:
PKEuS 2016-07-07 18:27:31 +02:00
parent d7bf0f4e4e
commit 3bdcf68990
2 changed files with 19 additions and 3 deletions
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2
lib/checkunusedvar.cpp
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@ -769,7 +769,7 @@ void CheckUnusedVar::checkFunctionVariableUsage_iterateScopes(const Scope* const
variables.clear();
break;
}
if (Token::simpleMatch(tok, "goto")) { // https://sourceforge.net/apps/trac/cppcheck/ticket/4447
if (Token::Match(tok, "goto|break")) { // #4447
variables.clear();
break;
}

20
test/testunusedvar.cpp
View File

@ -3770,9 +3770,25 @@ private:
" }\n"
" return ptr;\n"
"}");
ASSERT_EQUALS("", errout.str()); // Don't write an error that "a" is not used
// Don't write an error that "a" is not used
ASSERT_EQUALS("", errout.str());
functionVariableUsage("void x() {\n"
" unsigned char* pcOctet = NULL;\n"
" float fValeur;\n"
" switch (pnodeCurrent->left.pnode->usLen) {\n"
" case 4:\n"
" fValeur = (float)pevalDataLeft->data.fd;\n"
" pcOctet = (unsigned char*)&fValeur;\n"
" break;\n"
" case 8:\n"
" pcOctet = (unsigned char*)&pevalDataLeft->data.fd;\n"
" break;\n"
" }\n"
" for (iIndice = 1; iIndice <= (pnodeCurrent->usLen / 2); iIndice++) {\n"
" *pcData = gacHexChar[(*pcOctet >> 4) & 0x0F];\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str()); // Don't write an error that "fValeur" is not used
}
void localvarNULL() { // #4203 - Setting NULL value is not redundant - it is safe