Method standard_json_tools

common/chat-peg-parser.cpp:819–867

}

common_peg_parser common_chat_peg_builder::standard_json_tools(
                                                       const std::string &              section_start,
                                                       const std::string &              section_end,
                                                       const ordered_json &             tools,
                                                       bool                             parallel_tool_calls,
                                                       bool                             force_tool_calls,
                                                       const std::string &              name_key,
                                                       const std::string &              args_key,
                                                       bool                             array_wrapped,
                                                       bool                             function_is_key,
                                                       const std::string &              call_id_key,
                                                       const std::string &              gen_call_id_key,
                                                       const std::vector<std::string> & parameters_order) {
    if (!tools.is_array() || tools.empty()) {
        return eps();
    }

    std::string effective_name_key = name_key.empty() ? "name" : name_key;
    std::string effective_args_key = args_key.empty() ? "arguments" : args_key;

    // Dispatch to the appropriate builder based on the JSON layout mode
    common_peg_parser tool_choices = eps();
    if (function_is_key) {
        tool_choices = build_json_tools_function_is_key(tools, args_key, effective_args_key, call_id_key, gen_call_id_key);
    } else {
        auto name_spec = parse_key_spec(effective_name_key);
        auto args_spec = parse_key_spec(effective_args_key);
        if (!name_spec.first.empty() || !args_spec.first.empty()) {
            tool_choices = build_json_tools_nested_keys(tools, effective_name_key, effective_args_key, call_id_key, gen_call_id_key);
        } else {
            tool_choices = build_json_tools_flat_keys(tools, effective_name_key, effective_args_key, call_id_key, gen_call_id_key, parameters_order);
        }
    }

    // Build the section with markers
    auto tool_calls = tool_choices;
    if (parallel_tool_calls) {
        tool_calls = tool_calls + zero_or_more(space() + literal(",") + space() + tool_choices);
    }

    if (array_wrapped) {
        tool_calls = literal("[") + space() + tool_calls + space() + literal("]");
    }

    auto section =
        trigger_rule("tool-call", literal(section_start) + space() + tool_calls + space() + literal(section_end));

    return force_tool_calls ? section : optional(section);
}

void common_chat_peg_gemma4_mapper::from_ast(const common_peg_ast_arena & arena, const common_peg_parse_result & result) {
    for (const auto & node : result.nodes) {