Method missingComparison

lib/checkstl.cpp:1866–1928

}

void CheckStlImpl::missingComparison()
{
    if (!mSettings.severity.isEnabled(Severity::warning))
        return;

    logChecker("CheckStl::missingComparison"); // warning

    const SymbolDatabase* const symbolDatabase = mTokenizer->getSymbolDatabase();

    for (const Scope &scope : symbolDatabase->scopeList) {
        if (scope.type != ScopeType::eFor || !scope.classDef)
            continue;

        for (const Token *tok2 = scope.classDef->tokAt(2); tok2 != scope.bodyStart; tok2 = tok2->next()) {
            if (tok2->str() == ";")
                break;

            if (!Token::Match(tok2, "%var% = %name% . begin|rbegin|cbegin|crbegin ( ) ; %name% != %name% . end|rend|cend|crend ( ) ; ++| %name% ++| ) {"))
                continue;

            // same container
            if (tok2->strAt(2) != tok2->strAt(10))
                break;

            const int iteratorId(tok2->varId());

            // same iterator
            if (iteratorId == tok2->tokAt(10)->varId())
                break;

            // increment iterator
            if (!Token::Match(tok2->tokAt(16), "++ %varid% )", iteratorId) &&
                !Token::Match(tok2->tokAt(16), "%varid% ++ )", iteratorId)) {
                break;
            }

            const Token *incrementToken = nullptr;
            // Parse loop..
            for (const Token *tok3 = scope.bodyStart; tok3 != scope.bodyEnd; tok3 = tok3->next()) {
                if (tok3->varId() == iteratorId) {
                    if (Token::Match(tok3, "%varid% = %name% . insert ( ++| %varid% ++| ,", iteratorId)) {
                        // skip insertion..
                        tok3 = tok3->linkAt(6);
                        if (!tok3)
                            break;
                    } else if (Token::simpleMatch(tok3->astParent(), "++"))
                        incrementToken = tok3;
                    else if (Token::simpleMatch(tok3->astParent(), "+")) {
                        if (Token::Match(tok3->astSibling(), "%num%")) {
                            const Token* tokenGrandParent = tok3->astParent()->astParent();
                            if (Token::Match(tokenGrandParent, "==|!="))
                                break;
                        }
                    } else if (Token::Match(tok3->astParent(), "==|!="))
                        incrementToken = nullptr;
                } else if (tok3->str() == "break" || tok3->str() == "return")
                    incrementToken = nullptr;
            }