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AssignIf: Improved handling of function calls

This commit is contained in:
Daniel Marjamäki 2013-08-13 14:08:54 +02:00
parent f420de24ef
commit fd26bad6fa
2 changed files with 18 additions and 5 deletions
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19
lib/checkassignif.cpp
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@ -99,9 +99,22 @@ bool CheckAssignIf::assignIfParseScope(const Token * const assignTok,
}
return true;
}
if (Token::Match(tok2, "[(,] &| %varid% [,)]", varid))
// TODO: don't bailout if variable is passed by value
return true;
if (Token::Match(tok2, "[(,] &| %varid% [,)]", varid)) {
unsigned int argumentNumber = 0;
const Token *ftok;
for (ftok = tok2; ftok && ftok->str() != "("; ftok = ftok->previous()) {
if (ftok->str() == ")")
ftok = ftok->link();
else if (ftok->str() == ",")
argumentNumber++;
}
ftok = ftok ? ftok->previous() : NULL;
if (!(ftok && ftok->function()))
return true;
const Variable *par = ftok->function()->getArgumentVar(argumentNumber);
if (par == NULL || par->isReference() || par->isPointer())
return true;
}
if (tok2->str() == "}")
return false;
if (Token::Match(tok2, "break|continue|return"))

4
test/testassignif.cpp
View File

@ -169,10 +169,10 @@ private:
check("void do_something(int);\n"
"void f(int x) {\n"
" int y = x & 7;\n"
" do_something(y);\n" // passing variable by value => error
" do_something(y);\n"
" if (y==8);\n"
"}");
TODO_ASSERT_EQUALS("error", "", errout.str());
ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:5]: (style) Mismatching assignment and comparison, comparison 'y==8' is always false.\n", errout.str());
check("void f(int x) {\n"
" extern int y; y = x & 7;\n"