Function find_function_params

internal/cbm/extract_defs.c:3405–3429

Resolve the parameter-list node across the grammars used by the generic * definition extractor. Newer tree-sitter-kotlin exposes * `function_value_parameters` as a direct child rather than a `parameters` * field. Keep the legacy and ordered signature extractors on the same node so * adding positional metadata does not replace or reinterpret `param_types`. */

 * field. Keep the legacy and ordered signature extractors on the same node so
 * adding positional metadata does not replace or reinterpret `param_types`. */
static TSNode find_function_params(TSNode func_node, CBMLanguage lang) {
    TSNode params = ts_node_child_by_field_name(func_node, TS_FIELD("parameters"));
    // ObjectScript exposes the parameter list under a `parameter_list` field.
    if (ts_node_is_null(params) &&
        (lang == CBM_LANG_OBJECTSCRIPT_UDL || lang == CBM_LANG_OBJECTSCRIPT_ROUTINE)) {
        params = ts_node_child_by_field_name(func_node, TS_FIELD("parameter_list"));
    }
    if (ts_node_is_null(params) && lang == CBM_LANG_OBJECTSCRIPT_ROUTINE) {
        params = cbm_find_child_by_kind(func_node, "parameter_list");
    }
    if (ts_node_is_null(params) && lang == CBM_LANG_OBJECTSCRIPT_UDL) {
        TSNode method_definition = cbm_find_child_by_kind(func_node, "method_definition");
        if (!ts_node_is_null(method_definition)) {
            params = cbm_find_child_by_kind(method_definition, "arguments");
        }
    }
    if (ts_node_is_null(params) && lang == CBM_LANG_KOTLIN) {
        params = cbm_find_child_by_kind(func_node, "function_value_parameters");
    }
    if (ts_node_is_null(params) && (lang == CBM_LANG_C || lang == CBM_LANG_CPP ||
                                    lang == CBM_LANG_CUDA || lang == CBM_LANG_GLSL)) {
        params = find_c_params(func_node);
    }
    return params;
}

// C++: resolve trailing return type (auto f() -> Type) on a declarator node.
// Updates def->return_type and def->return_types if trailing type found.