Method choice

common/peg-parser.cpp:1189–1201

}

common_peg_parser common_peg_parser_builder::choice(const std::vector<common_peg_parser_id> & parsers) {
    // Flatten nested choices
    std::vector<common_peg_parser_id> flattened;
    for (const auto & p : parsers) {
        const auto & parser = arena_.get(p);
        if (auto choice = std::get_if<common_peg_choice_parser>(&parser)) {
            flattened.insert(flattened.end(), choice->children.begin(), choice->children.end());
        } else {
            flattened.push_back(p);
        }
    }
    return wrap(arena_.add_parser(common_peg_choice_parser{flattened}));
}

common_peg_parser common_peg_parser_builder::choice(const std::vector<common_peg_parser> & parsers) {
    std::vector<common_peg_parser_id> ids;