Method simplifyCPPAttribute

lib/tokenize.cpp:9695–9850

}

void Tokenizer::simplifyCPPAttribute()
{
    // According to cppreference alignas is a c21 feature however the macro is often available when compiling c11
    const bool hasAlignas = ((isCPP() && mSettings.standards.cpp >= Standards::CPP11) || (isC() && mSettings.standards.c >= Standards::C11));
    const bool hasCppAttribute = ((isCPP() && mSettings.standards.cpp >= Standards::CPP11) || (isC() && mSettings.standards.c >= Standards::C23));
    const bool hasMaybeUnused =((isCPP() && mSettings.standards.cpp >= Standards::CPP17) || (isC() && mSettings.standards.c >= Standards::C23));
    const bool hasMaybeUnusedUnderscores = (isC() && mSettings.standards.c >= Standards::C23);

    if (!hasAlignas && !hasCppAttribute)
        return;

    for (Token *tok = list.front(); tok;) {
        if (!isCPPAttribute(tok) && !isAlignAttribute(tok)) {
            tok = tok->next();
            continue;
        }
        if (isCPPAttribute(tok)) {
            if (!hasCppAttribute) {
                tok = skipCPPOrAlignAttribute(tok)->next();
                continue;
            }
            if (Token::findsimplematch(tok->tokAt(2), "noreturn", tok->link())) {
                Token * head = skipCPPOrAlignAttribute(tok)->next();
                while (isCPPAttribute(head) || isAlignAttribute(head))
                    head = skipCPPOrAlignAttribute(head)->next();
                while (Token::Match(head, "%name%|::|*|&|<|>|,")) // skip return type
                    head = head->next();
                if (head && head->str() == "(" && (TokenList::isFunctionHead(head, "{;") || Token::simpleMatch(head->link(), ") __attribute__"))) {
                    head->previous()->isAttributeNoreturn(true);
                }
            } else if (Token::findsimplematch(tok->tokAt(2), "nodiscard", tok->link())) {
                Token * head = skipCPPOrAlignAttribute(tok)->next();
                while (isCPPAttribute(head) || isAlignAttribute(head))
                    head = skipCPPOrAlignAttribute(head)->next();
                while (Token::Match(head, "%name%|::|*|&|<|>|,"))
                    head = head->next();
                if (head && head->str() == "(" && TokenList::isFunctionHead(head, "{;")) {
                    head->previous()->isAttributeNodiscard(true);
                }
            } else if (Token::findsimplematch(tok->tokAt(2), "fallthrough", tok->link()) || Token::findsimplematch(tok->tokAt(2), "__fallthrough__", tok->link())) {
                Token * head = skipCPPOrAlignAttribute(tok)->next();
                while (isCPPAttribute(head) || isAlignAttribute(head))
                    head = skipCPPOrAlignAttribute(head)->next();
                while (head && head->str() == ";") // we have semicollon after the attribute which would be removed in 'removeRedundantSemicolons()' so we skip it
                    head = head->next();
                if (head)
                    head->isAttributeFallthrough(true);
            } else if ((hasMaybeUnusedUnderscores && Token::findsimplematch(tok->tokAt(2), "__maybe_unused__", tok->link()))
                       || (hasMaybeUnused && Token::findsimplematch(tok->tokAt(2), "maybe_unused", tok->link()))) {
                Token* head = skipCPPOrAlignAttribute(tok)->next();
                while (isCPPAttribute(head) || isAlignAttribute(head))
                    head = skipCPPOrAlignAttribute(head)->next();

                if (!head)
                    syntaxError(tok);

                if (Token::simpleMatch(head, ";")) {
                    Token *backTok = tok;