Autocompletion: Add arghint for annotations

modules/gdscript/gdscript_editor.cpp

@@ -864,7 +864,8 @@ static void _get_directory_contents(EditorFileSystemDirectory *p_dir, HashMap<St
 	}
 }
 
-static void _find_annotation_arguments(const GDScriptParser::AnnotationNode *p_annotation, int p_argument, const String p_quote_style, HashMap<String, ScriptLanguage::CodeCompletionOption> &r_result) {
+static void _find_annotation_arguments(const GDScriptParser::AnnotationNode *p_annotation, int p_argument, const String p_quote_style, HashMap<String, ScriptLanguage::CodeCompletionOption> &r_result, String &r_arghint) {
+	r_arghint = _make_arguments_hint(p_annotation->info->info, p_argument, true);
 	if (p_annotation->name == SNAME("@export_range")) {
 		if (p_argument == 3 || p_argument == 4 || p_argument == 5) {
 			// Slider hint.
@@ -3183,7 +3184,7 @@ static void _find_call_arguments(GDScriptParser::CompletionContext &p_context, c
 				break;
 			}
 			const GDScriptParser::AnnotationNode *annotation = static_cast<const GDScriptParser::AnnotationNode *>(completion_context.node);
-			_find_annotation_arguments(annotation, completion_context.current_argument, quote_style, options);
+			_find_annotation_arguments(annotation, completion_context.current_argument, quote_style, options, r_call_hint);
 			r_forced = true;
 		} break;
 		case GDScriptParser::COMPLETION_BUILT_IN_TYPE_CONSTANT_OR_STATIC_METHOD: {

modules/gdscript/gdscript_parser.cpp

@@ -1639,23 +1639,29 @@ GDScriptParser::AnnotationNode *GDScriptParser::parse_annotation(uint32_t p_vali
 		advance();
 		// Arguments.
 		push_completion_call(annotation);
-		make_completion_context(COMPLETION_ANNOTATION_ARGUMENTS, annotation, 0);
 		int argument_index = 0;
 		do {
+			make_completion_context(COMPLETION_ANNOTATION_ARGUMENTS, annotation, argument_index);
+			set_last_completion_call_arg(argument_index);
 			if (check(GDScriptTokenizer::Token::PARENTHESIS_CLOSE)) {
 				// Allow for trailing comma.
 				break;
 			}
 
-			make_completion_context(COMPLETION_ANNOTATION_ARGUMENTS, annotation, argument_index);
-			set_last_completion_call_arg(argument_index++);
 			ExpressionNode *argument = parse_expression(false);
+
 			if (argument == nullptr) {
 				push_error("Expected expression as the annotation argument.");
 				valid = false;
-				continue;
+			} else {
+				annotation->arguments.push_back(argument);
+
+				if (argument->type == Node::LITERAL) {
+					override_completion_context(argument, COMPLETION_ANNOTATION_ARGUMENTS, annotation, argument_index);
+				}
 			}
-			annotation->arguments.push_back(argument);
+
+			argument_index++;
 		} while (match(GDScriptTokenizer::Token::COMMA) && !is_at_end());
 
 		pop_multiline();