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AssignIf: handle parantheses. ticket: #2909

This commit is contained in:
Daniel Marjamäki 2011-07-31 17:09:53 +02:00
parent dd6982a616
commit afc825da68
2 changed files with 17 additions and 3 deletions
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14
lib/checkassignif.cpp
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@ -92,19 +92,27 @@ void CheckAssignIf::comparison()
if (tok->str() != "&")
continue;
if (Token::Match(tok, "& %num% ==|!= %num% &&|%oror%|)"))
if (Token::Match(tok, "& %num% )| ==|!= %num% &&|%oror%|)"))
{
const MathLib::bigint num1 = MathLib::toLongNumber(tok->strAt(1));
if (num1 < 0)
continue;
const MathLib::bigint num2 = MathLib::toLongNumber(tok->strAt(3));
const Token *compareToken = tok->tokAt(2);
if (compareToken->str() == ")")
{
if (!Token::Match(compareToken->link()->previous(), "(|%oror%|&&"))
continue;
compareToken = compareToken->next();
}
const MathLib::bigint num2 = MathLib::toLongNumber(compareToken->strAt(1));
if (num2 < 0)
continue;
if ((num1 & num2) != num2)
{
const std::string op(tok->strAt(2));
const std::string op(compareToken->str());
comparisonError(tok, op=="==" ? false : true);
}
}

6
test/testassignif.cpp
View File

@ -85,6 +85,12 @@ private:
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Comparison is always false\n", errout.str());
check("void foo(int x)\n"
"{\n"
" if ((x & 4) == 3);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Comparison is always false\n", errout.str());
check("void foo(int x)\n"
"{\n"
" if (x & 4 != 3);\n"