From 17cdff607a8fa1ad086a955d92f6e6cf5e973dde Mon Sep 17 00:00:00 2001
From: fisker Cheung <lionkay@gmail.com>
Date: Fri, 13 Jun 2025 17:27:07 +0800
Subject: [PATCH] Support type cast comments for `meriyah` parser (#17600)

---
 changelog_unreleased/javascript/17491.md | 4 ++--
 src/language-js/parse/meriyah.js         | 2 +-
 tests/config/run-format-test.js          | 9 ++++-----
 3 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/changelog_unreleased/javascript/17491.md b/changelog_unreleased/javascript/17491.md
index 809a9c8cd..4440ee625 100644
--- a/changelog_unreleased/javascript/17491.md
+++ b/changelog_unreleased/javascript/17491.md
@@ -1,4 +1,4 @@
-#### Support type cast comments for `acorn` and `espree` parser (#17491, #17566 by @ArnaudBarre, #17587 by #fisker)
+#### Support type cast comments for `acorn`, `espree`, and `meriyah` parser (#17491, #17566 by @ArnaudBarre, #17587, #17600 by #fisker)
 
 This was previously only supported by the Babel parser.
 
@@ -7,7 +7,7 @@ This was previously only supported by the Babel parser.
 // Input
 /** @type {MyType} */ (x).foo;
 
-// Prettier stable (--parser=acorn or --parser=espree)
+// Prettier stable (--parser=acorn|espree|meriyah)
 /** @type {MyType} */ x.foo;
 
 // Prettier main
diff --git a/src/language-js/parse/meriyah.js b/src/language-js/parse/meriyah.js
index fc27bd3a8..cceba7717 100644
--- a/src/language-js/parse/meriyah.js
+++ b/src/language-js/parse/meriyah.js
@@ -30,7 +30,7 @@ const parseOptions = {
   // Enable implied strict mode
   impliedStrict: false,
   // Enable non-standard parenthesized expression node
-  preserveParens: false,
+  preserveParens: true,
   // Enable lexical binding and scope tracking
   lexical: false,
   // Adds a source attribute in every node’s loc object when the locations option is `true`
diff --git a/tests/config/run-format-test.js b/tests/config/run-format-test.js
index f5024d86b..d68b834e4 100644
--- a/tests/config/run-format-test.js
+++ b/tests/config/run-format-test.js
@@ -59,16 +59,15 @@ const unstableTests = new Map(
 const unstableAstTests = new Map();
 const commentClosureTypecaseTests = new Set(
   [
-    // These tests only work for `babel`, `acorn`, and `oxc`
+    // These tests works on `babel`, `acorn`, `espree`, `oxc`, and `meriyah`
     "comments-closure-typecast",
   ].map((directory) => path.join(__dirname, "../format/js", directory)),
 );
 
 const espreeDisabledTests = new Set();
 const acornDisabledTests = new Set();
-const meriyahDisabledTests = new Set([
-  ...commentClosureTypecaseTests,
-  ...[
+const meriyahDisabledTests = new Set(
+  [
     // Parsing to different ASTs
     "js/decorators/member-expression.js",
     // Meriyah parse RegExp relay on runtime behavior
@@ -79,7 +78,7 @@ const meriyahDisabledTests = new Set([
     "js/babel-plugins/regexp-modifiers.js",
     "js/regex/regexp-modifiers.js",
   ].map((file) => path.join(__dirname, "../format", file)),
-]);
+);
 const babelTsDisabledTests = new Set(
   ["conformance/types/moduleDeclaration/kind-detection.ts"].map((file) =>
     path.join(__dirname, "../format/typescript", file),