accessor field

packages/svelte/src/compiler/phases/2-analyze/index.js

@@ -64,6 +64,7 @@ import { TaggedTemplateExpression } from './visitors/TaggedTemplateExpression.js
 import { Text } from './visitors/Text.js';
 import { TitleElement } from './visitors/TitleElement.js';
 import { TSEnumDeclaration } from './visitors/TSEnumDeclaration.js';
+import { TSModuleDeclaration } from './visitors/TSModuleDeclaration.js';
 import { UpdateExpression } from './visitors/UpdateExpression.js';
 import { UseDirective } from './visitors/UseDirective.js';
 import { VariableDeclarator } from './visitors/VariableDeclarator.js';
@@ -178,7 +179,8 @@ const visitors = {
 	VariableDeclarator,
 
 	// @ts-expect-error
-	TSEnumDeclaration
+	TSEnumDeclaration,
+	TSModuleDeclaration
 };
 
 /**

packages/svelte/src/compiler/phases/2-analyze/visitors/PropertyDefinition.js

@@ -0,0 +1,13 @@
+/** @import { Context } from '../types' */
+import * as e from '../../../errors.js';
+
+/**
+ * @param {any} node
+ * @param {Context} context
+ */
+export function PropertyDefinition(node, context) {
+	// acorn plugin adds this field
+	if (node.accessor) {
+		e.typescript_invalid_feature(node, 'accessor fields (related TSC proposal is not stage 4 yet)');
+	}
+}