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ValueFlow: Template arguments have 'possible' values

This commit is contained in:
Daniel Marjamäki 2018-01-11 14:22:27 +01:00
parent bbeff99cc3
commit 6fd157e93b
2 changed files with 30 additions and 17 deletions
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40
lib/valueflow.cpp
View File

@ -670,21 +670,25 @@ static Token * valueFlowSetConstantValue(const Token *tok, const Settings *setti
{
if ((tok->isNumber() && MathLib::isInt(tok->str())) || (tok->tokType() == Token::eChar)) {
ValueFlow::Value value(MathLib::toLongNumber(tok->str()));
value.setKnown();
if (!tok->isTemplateArg())
value.setKnown();
setTokenValue(const_cast<Token *>(tok), value, settings);
} else if (tok->isNumber() && MathLib::isFloat(tok->str())) {
ValueFlow::Value value;
value.valueType = ValueFlow::Value::FLOAT;
value.floatValue = MathLib::toDoubleNumber(tok->str());
value.setKnown();
if (!tok->isTemplateArg())
value.setKnown();
setTokenValue(const_cast<Token *>(tok), value, settings);
} else if (tok->enumerator() && tok->enumerator()->value_known) {
ValueFlow::Value value(tok->enumerator()->value);
value.setKnown();
if (!tok->isTemplateArg())
value.setKnown();
setTokenValue(const_cast<Token *>(tok), value, settings);
} else if (tok->str() == "NULL" || (cpp && tok->str() == "nullptr")) {
ValueFlow::Value value(0);
value.setKnown();
if (!tok->isTemplateArg())
value.setKnown();
setTokenValue(const_cast<Token *>(tok), value, settings);
} else if (Token::simpleMatch(tok, "sizeof (")) {
const Token *tok2 = tok->tokAt(2);
@ -695,7 +699,7 @@ static Token * valueFlowSetConstantValue(const Token *tok, const Settings *setti
size = getSizeOfType(type, settings);
}
ValueFlow::Value value(size);
if (settings->platformType != cppcheck::Platform::Unspecified)
if (!tok2->isTemplateArg() && settings->platformType != cppcheck::Platform::Unspecified)
value.setKnown();
setTokenValue(const_cast<Token *>(tok), value, settings);
setTokenValue(const_cast<Token *>(tok->next()), value, settings);
@ -708,7 +712,7 @@ static Token * valueFlowSetConstantValue(const Token *tok, const Settings *setti
}
}
ValueFlow::Value value(size);
if (settings->platformType != cppcheck::Platform::Unspecified)
if (!tok2->isTemplateArg() && settings->platformType != cppcheck::Platform::Unspecified)
value.setKnown();
setTokenValue(const_cast<Token *>(tok), value, settings);
setTokenValue(const_cast<Token *>(tok->next()), value, settings);
@ -724,7 +728,7 @@ static Token * valueFlowSetConstantValue(const Token *tok, const Settings *setti
sz1->variable()->dimensionKnown(0) &&
(Token::Match(sz2, "* %varid% )", varid1) || Token::Match(sz2, "%varid% [ 0 ] )", varid1))) {
ValueFlow::Value value(sz1->variable()->dimension(0));
if (settings->platformType != cppcheck::Platform::Unspecified)
if (!tok2->isTemplateArg() && settings->platformType != cppcheck::Platform::Unspecified)
value.setKnown();
setTokenValue(const_cast<Token *>(tok->tokAt(4)), value, settings);
}
@ -732,42 +736,42 @@ static Token * valueFlowSetConstantValue(const Token *tok, const Settings *setti
const ValueType &vt = ValueType::parseDecl(tok2,settings);
if (vt.pointer) {
ValueFlow::Value value(settings->sizeof_pointer);
if (settings->platformType != cppcheck::Platform::Unspecified)
if (!tok2->isTemplateArg() && settings->platformType != cppcheck::Platform::Unspecified)
value.setKnown();
setTokenValue(const_cast<Token *>(tok->next()), value, settings);
} else if (vt.type == ValueType::Type::CHAR) {
ValueFlow::Value value(1);
if (settings->platformType != cppcheck::Platform::Unspecified)
if (!tok2->isTemplateArg() && settings->platformType != cppcheck::Platform::Unspecified)
value.setKnown();
setTokenValue(const_cast<Token *>(tok->next()), value, settings);
} else if (vt.type == ValueType::Type::SHORT) {
ValueFlow::Value value(settings->sizeof_short);
if (settings->platformType != cppcheck::Platform::Unspecified)
if (!tok2->isTemplateArg() && settings->platformType != cppcheck::Platform::Unspecified)
value.setKnown();
setTokenValue(const_cast<Token *>(tok->next()), value, settings);
} else if (vt.type == ValueType::Type::INT) {
ValueFlow::Value value(settings->sizeof_int);
if (settings->platformType != cppcheck::Platform::Unspecified)
if (!tok2->isTemplateArg() && settings->platformType != cppcheck::Platform::Unspecified)
value.setKnown();
setTokenValue(const_cast<Token *>(tok->next()), value, settings);
} else if (vt.type == ValueType::Type::LONG) {
ValueFlow::Value value(settings->sizeof_long);
if (settings->platformType != cppcheck::Platform::Unspecified)
if (!tok2->isTemplateArg() && settings->platformType != cppcheck::Platform::Unspecified)
value.setKnown();
setTokenValue(const_cast<Token *>(tok->next()), value, settings);
} else if (vt.type == ValueType::Type::LONGLONG) {
ValueFlow::Value value(settings->sizeof_long_long);
if (settings->platformType != cppcheck::Platform::Unspecified)
if (!tok2->isTemplateArg() && settings->platformType != cppcheck::Platform::Unspecified)
value.setKnown();
setTokenValue(const_cast<Token *>(tok->next()), value, settings);
} else if (vt.type == ValueType::Type::FLOAT) {
ValueFlow::Value value(settings->sizeof_float);
if (settings->platformType != cppcheck::Platform::Unspecified)
if (!tok2->isTemplateArg() && settings->platformType != cppcheck::Platform::Unspecified)
value.setKnown();
setTokenValue(const_cast<Token *>(tok->next()), value, settings);
} else if (vt.type == ValueType::Type::DOUBLE) {
ValueFlow::Value value(settings->sizeof_double);
if (settings->platformType != cppcheck::Platform::Unspecified)
if (!tok2->isTemplateArg() && settings->platformType != cppcheck::Platform::Unspecified)
value.setKnown();
setTokenValue(const_cast<Token *>(tok->next()), value, settings);
}
@ -789,13 +793,15 @@ static void valueFlowNumber(TokenList *tokenlist)
for (Token *tok = tokenlist->front(); tok; tok = tok->next()) {
if (tok->isName() && !tok->varId() && Token::Match(tok, "false|true")) {
ValueFlow::Value value(tok->str() == "true");
value.setKnown();
if (!tok->isTemplateArg())
value.setKnown();
setTokenValue(tok, value, tokenlist->getSettings());
} else if (Token::Match(tok, "[(,] NULL [,)]")) {
// NULL function parameters are not simplified in the
// normal tokenlist
ValueFlow::Value value(0);
value.setKnown();
if (!tok->isTemplateArg())
value.setKnown();
setTokenValue(tok->next(), value, tokenlist->getSettings());
}
}

7
test/testvalueflow.cpp
View File

@ -2622,6 +2622,13 @@ private:
ASSERT_EQUALS(true, testValueOfX(code, 4U, 6));
ASSERT_EQUALS(false, testValueOfX(code, 4U, 7));
ASSERT(value.isKnown());
// template parameters are not known
code = "template <int X> void f() { a = X; }\n"
"f<1>();";
value = valueOfTok(code, "1");
ASSERT_EQUALS(1, value.intvalue);
ASSERT_EQUALS(false, value.isKnown());
}
void valueFlowSizeofForwardDeclaredEnum() {