Method size

lib/checkstl.cpp:1764–1811

}

void CheckStlImpl::size()
{
    if (!mSettings.severity.isEnabled(Severity::performance))
        return;

    if (mSettings.standards.cpp >= Standards::CPP11)
        return;

    logChecker("CheckStl::size"); // performance,c++03

    const SymbolDatabase* const symbolDatabase = mTokenizer->getSymbolDatabase();
    for (const Scope * scope : symbolDatabase->functionScopes) {
        for (const Token* tok = scope->bodyStart->next(); tok != scope->bodyEnd; tok = tok->next()) {
            if (Token::Match(tok, "%var% . size ( )") ||
                Token::Match(tok, "%name% . %var% . size ( )")) {
                // get the variable
                const Token *varTok = tok;
                if (tok->strAt(2) != "size")
                    varTok = varTok->tokAt(2);

                const Token* const end = varTok->tokAt(5);

                // check for comparison to zero
                if ((!tok->previous()->isArithmeticalOp() && Token::Match(end, "==|<=|!=|> 0")) ||
                    (end->next() && !end->next()->isArithmeticalOp() && Token::Match(tok->tokAt(-2), "0 ==|>=|!=|<"))) {
                    if (isCpp03ContainerSizeSlow(varTok)) {
                        sizeError(varTok);
                        continue;
                    }
                }

                // check for comparison to one
                if ((!tok->previous()->isArithmeticalOp() && Token::Match(end, ">=|< 1") && !end->tokAt(2)->isArithmeticalOp()) ||
                    (end->next() && !end->next()->isArithmeticalOp() && Token::Match(tok->tokAt(-2), "1 <=|>") && !tok->tokAt(-3)->isArithmeticalOp())) {
                    if (isCpp03ContainerSizeSlow(varTok))
                        sizeError(varTok);
                }

                // check for using as boolean expression
                else if ((Token::Match(tok->tokAt(-2), "if|while (") && end->str() == ")") ||
                         (tok->previous()->tokType() == Token::eLogicalOp && Token::Match(end, "&&|)|,|;|%oror%"))) {
                    if (isCpp03ContainerSizeSlow(varTok))
                        sizeError(varTok);
                }
            }
        }
    }
}

void CheckStlImpl::sizeError(const Token *tok)
{