Method expand

externals/simplecpp/simplecpp.cpp:1593–1684

* Expand macro. This will recursively expand inner macros. * @param output destination tokenlist * @param rawtok macro token * @param macros list of macros * @param inputFiles the input files * @return token after macro * @throws Error thrown on missing or invalid preprocessor directives * @throws wrongNumberOfParameters th

         * @throws invalidHashHash thrown on invalid ## usage
         */
        const Token * expand(TokenList & output,
                             const Token * rawtok,
                             const MacroMap &macros,
                             std::vector<std::string> &inputFiles) const {
            std::set<TokenString> expandedmacros;

#ifdef SIMPLECPP_DEBUG_MACRO_EXPANSION
            std::cout << "expand " << name() << " " << locstring(rawtok->location) << std::endl;
#endif

            TokenList output2(inputFiles);

            if (functionLike() && rawtok->next && rawtok->next->op == '(') {
                // Copy macro call to a new tokenlist with no linebreaks
                const Token * const rawtok1 = rawtok;
                TokenList rawtokens2(inputFiles);
                rawtokens2.push_back(new Token(rawtok->str(), rawtok1->location, rawtok->whitespaceahead));
                rawtok = rawtok->next;
                rawtokens2.push_back(new Token(rawtok->str(), rawtok1->location, rawtok->whitespaceahead));
                rawtok = rawtok->next;
                int par = 1;
                while (rawtok && par > 0) {
                    if (rawtok->op == '(')
                        ++par;
                    else if (rawtok->op == ')')
                        --par;
                    else if (rawtok->op == '#' && !sameline(rawtok->previous, rawtok))
                        throw Error(rawtok->location, "it is invalid to use a preprocessor directive as macro parameter");
                    rawtokens2.push_back(new Token(rawtok->str(), rawtok1->location, rawtok->whitespaceahead));
                    rawtok = rawtok->next;
                }
                if (expand(output2, rawtok1->location, rawtokens2.cfront(), macros, expandedmacros))
                    rawtok = rawtok1->next;
            } else {
                rawtok = expand(output2, rawtok->location, rawtok, macros, expandedmacros);
            }
            while (output2.cback() && rawtok) {
                unsigned int par = 0;
                Token* macro2tok = output2.back();
                while (macro2tok) {
                    if (macro2tok->op == '(') {
                        if (par==0)
                            break;
                        --par;
                    } else if (macro2tok->op == ')') {
                        ++par;
                    }
                    macro2tok = macro2tok->previous;
                }
                if (macro2tok) { // macro2tok->op == '('
                    macro2tok = macro2tok->previous;
                    expandedmacros.insert(name());
                } else if (rawtok->op == '(') {
                    macro2tok = output2.back();
                }
                if (!macro2tok || !macro2tok->name)
                    break;
                if (output2.cfront() != output2.cback() && macro2tok->str() == this->name())