feat: minor type improvements (#9989)

Author: elliott-with-the-longest-name-on-github

packages/svelte/src/compiler/index.js

@@ -6,6 +6,7 @@ import { getLocator } from 'locate-character';
 import { walk } from 'zimmerframe';
 import { validate_component_options, validate_module_options } from './validate-options.js';
 import { convert } from './legacy.js';
+import { CompileError } from './errors.js';
 export { default as preprocess } from './preprocess/index.js';
 
 /**
@@ -30,12 +31,8 @@ export function compile(source, options) {
 		const result = transform_component(analysis, source, combined_options);
 		return result;
 	} catch (e) {
-		if (/** @type {any} */ (e).name === 'CompileError') {
-			handle_compile_error(
-				/** @type {import('#compiler').CompileError} */ (e),
-				options.filename,
-				source
-			);
+		if (e instanceof CompileError) {
+			handle_compile_error(e, options.filename, source);
 		}
 
 		throw e;
@@ -56,12 +53,8 @@ export function compileModule(source, options) {
 		const analysis = analyze_module(parse_acorn(source, false), validated);
 		return transform_module(analysis, source, validated);
 	} catch (e) {
-		if (/** @type {any} */ (e).name === 'CompileError') {
-			handle_compile_error(
-				/** @type {import('#compiler').CompileError} */ (e),
-				options.filename,
-				source
-			);
+		if (e instanceof CompileError) {
+			handle_compile_error(e, options.filename, source);
 		}
 
 		throw e;
@@ -106,12 +99,8 @@ export function parse(source, options = {}) {
 	try {
 		ast = _parse(source);
 	} catch (e) {
-		if (/** @type {any} */ (e).name === 'CompileError') {
-			handle_compile_error(
-				/** @type {import('#compiler').CompileError} */ (e),
-				options.filename,
-				source
-			);
+		if (e instanceof CompileError) {
+			handle_compile_error(e, options.filename, source);
 		}
 
 		throw e;

packages/svelte/src/compiler/phases/scope.js

@@ -712,5 +712,5 @@ export function get_rune(node, scope) {
 	const binding = scope.get(n.name);
 	if (binding !== null) return null; // rune name, but references a variable or store
 
-	return /** @type {Runes[number] | null} */ (joined);
+	return /** @type {typeof Runes[number] | null} */ (joined);
 }