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ExprEngine; refactoring if()

This commit is contained in:
Daniel Marjamäki 2020-12-20 14:51:03 +01:00
parent 1bf6a2f62b
commit 1ce5beb45f
1 changed files with 8 additions and 11 deletions
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19
lib/exprengine.cpp
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@ -2499,11 +2499,11 @@ static std::string execute(const Token *start, const Token *end, Data &data)
const Token *cond = tok->next()->astOperand2(); // TODO: C++17 condition
const ExprEngine::ValuePtr condValue = executeExpression(cond, data);
bool alwaysFalse = false;
bool alwaysTrue = false;
bool canBeFalse = true;
bool canBeTrue = true;
if (auto b = std::dynamic_pointer_cast<ExprEngine::BinOpResult>(condValue)) {
alwaysFalse = !b->isTrue(&data);
alwaysTrue = !alwaysFalse && !b->isEqual(&data, 0);
canBeFalse = b->isEqual(&data, 0);
canBeTrue = b->isTrue(&data);
}
Data &thenData(data);
@ -2529,10 +2529,10 @@ static std::string execute(const Token *start, const Token *end, Data &data)
}
};
if (!alwaysFalse)
if (canBeTrue)
exec(thenStart->next(), end, thenData);
if (!alwaysTrue) {
if (canBeFalse) {
if (Token::simpleMatch(thenEnd, "} else {")) {
const Token *elseStart = thenEnd->tokAt(2);
exec(elseStart->next(), end, elseData);
@ -2544,11 +2544,8 @@ static std::string execute(const Token *start, const Token *end, Data &data)
if (exceptionToken)
throw ExprEngineException(exceptionToken, exceptionMessage);
if (alwaysTrue)
return thenData.str();
else if (alwaysFalse)
return elseData.str();
return thenData.str() + elseData.str();
return (canBeTrue ? thenData.str() : std::string()) +
(canBeFalse ? elseData.str() : std::string());
}
else if (Token::simpleMatch(tok, "switch (")) {