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Fix #12446 FN cstyleCast with scope operator #5989

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merged 3 commits into from
Feb 19, 2024
Merged

Fix #12446 FN cstyleCast with scope operator #5989

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442aeb4
Fix #12446 FN cstyleCast with scope operator
chrchr-github Feb 16, 2024
40336c4
Fix
chrchr-github Feb 16, 2024
8a0acf8
Skip template arguments
chrchr-github Feb 16, 2024
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17 changes: 15 additions & 2 deletions lib/checkother.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -313,13 +313,26 @@ void CheckOther::warningOldStylePointerCast()
tok = scope->bodyStart;
for (; tok && tok != scope->bodyEnd; tok = tok->next()) {
// Old style pointer casting..
if (!Token::Match(tok, "( const|volatile| const|volatile|class|struct| %type% * *| *| const|&| ) (| %name%|%num%|%bool%|%char%|%str%|&"))
if (tok->str() != "(")
continue;
const Token* castTok = tok->next();
while (Token::Match(castTok, "const|volatile|class|struct|union|%type%|::")) {
castTok = castTok->next();
if (Token::simpleMatch(castTok, "<") && castTok->link())
castTok = castTok->link()->next();
}
if (castTok == tok->next() || !Token::simpleMatch(castTok, "*"))
continue;
while (Token::Match(castTok, "*|const|&"))
castTok = castTok->next();
if (!Token::Match(castTok, ") (| %name%|%num%|%bool%|%char%|%str%|&"))
continue;

if (Token::Match(tok->previous(), "%type%"))
continue;

// skip first "const" in "const Type* const"
while (Token::Match(tok->next(), "const|volatile|class|struct"))
while (Token::Match(tok->next(), "const|volatile|class|struct|union"))
tok = tok->next();
const Token* typeTok = tok->next();
// skip second "const" in "const Type* const"
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16 changes: 16 additions & 0 deletions test/testother.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1895,6 +1895,22 @@ class TestOther : public TestFixture {
ASSERT_EQUALS("[test.cpp:2]: (style) C-style pointer casting\n"
"[test.cpp:3]: (style) C-style pointer casting\n",
errout.str());

// #12446
checkOldStylePointerCast("namespace N { struct S {}; }\n"
"union U {\n"
" int i;\n"
" char c[4];\n"
"};\n"
"void f(void* p) {\n"
" auto ps = (N::S*)p;\n"
" auto pu = (union U*)p;\n"
" auto pv = (std::vector<int>*)(p);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:7]: (style) C-style pointer casting\n"
"[test.cpp:8]: (style) C-style pointer casting\n"
"[test.cpp:9]: (style) C-style pointer casting\n",
errout.str());
}

#define checkInvalidPointerCast(...) checkInvalidPointerCast_(__FILE__, __LINE__, __VA_ARGS__)
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