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Fixed #1165 (Tokenizer: wrong simplification of 'do { .. } while (0)' if the body contains continue or break)

This commit is contained in:
Daniel Marjamäki 2009-12-29 12:15:39 +01:00
parent 4cbae159b2
commit 160f795710
2 changed files with 19 additions and 3 deletions
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16
lib/tokenize.cpp
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@ -5053,6 +5053,17 @@ void Tokenizer::getErrorMessages()
syntaxError(0, ' ');
}
/** find pattern */
static bool findmatch(const Token *tok1, const Token *tok2, const char pattern[])
{
for (const Token *tok = tok1; tok && tok != tok2; tok = tok->next())
{
if (Token::Match(tok, pattern))
return true;
}
return false;
}
void Tokenizer::simplifyWhile0()
{
for (Token *tok = _tokens; tok; tok = tok->next())
@ -5064,16 +5075,19 @@ void Tokenizer::simplifyWhile0()
if (Token::simpleMatch(tok->tokAt(4), "{"))
{
const Token *end = tok->tokAt(4)->link();
if (!findmatch(tok, end, "continue|break"))
{
Token::eraseTokens(tok, end ? end->next() : 0);
tok->deleteThis(); // delete "while"
}
}
if (Token::simpleMatch(tok->previous(), "}"))
{
// find "do"
Token *tok2 = tok->previous()->link();
tok2 = tok2 ? tok2->previous() : 0;
if (tok2 && tok2->str() == "do")
if (tok2 && tok2->str() == "do" && !findmatch(tok2, tok, "continue|break"))
{
// delete "do {"
tok2->deleteThis();

2
test/testsimplifytokens.cpp
View File

@ -2520,6 +2520,8 @@ private:
void while0()
{
ASSERT_EQUALS("; x = 1 ; ;", tok("; do { x = 1 ; } while (0);"));
ASSERT_EQUALS("; do { continue ; } while ( false ) ;", tok("; do { continue ; } while (0);"));
ASSERT_EQUALS("; do { break ; } while ( false ) ;", tok("; do { break; } while (0);"));
}
};