Add support for Float16Array

This is only supported in environments where Float16Array is available.

Author: remcohaszing

README.md

@@ -49,6 +49,7 @@ Currently the following types are supported:
 - [`Boolean`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean)
 - [`Buffer`](https://nodejs.org/api/buffer.html)
 - [`Date`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Date)
+- [`Float16Array`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Float16Array)
 - [`Float32Array`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Float32Array)
 - [`Float64Array`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Float64Array)
 - [`Int16Array`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Int16Array)

fixtures/float16array/input.js

@@ -0,0 +1,9 @@
+// Used as input
+// { preserveReferences: true }
+export default new Float16Array([1, 2, 3])
+
+// -------------------------------------------------------------------------------------------------
+
+// Default output
+// { preserveReferences: false }
+const withoutPreserveReferences = new Float16Array([1, 2, 3])

package-lock.json

@@ -32,8 +32,9 @@
     "@types/estree": "^1.0.0"
   },
   "devDependencies": {
-    "@remcohaszing/eslint": "^11.0.0",
     "@js-temporal/polyfill": "^0.4.0",
+    "@petamoriken/float16": "^3.0.0",
+    "@remcohaszing/eslint": "^11.0.0",
     "@types/node": "^22.0.0",
     "astring": "^1.0.0",
     "c8": "^9.0.0",

package.json

@@ -159,6 +159,7 @@ function isTypedArray(
 ): value is
   | BigInt64Array
   | BigUint64Array
+  | Float16Array
   | Float32Array
   | Float64Array
   | Int8Array
@@ -171,6 +172,7 @@ function isTypedArray(
   return (
     value instanceof BigInt64Array ||
     value instanceof BigUint64Array ||
+    (typeof Float16Array !== 'undefined' && value instanceof Float16Array) ||
     value instanceof Float32Array ||
     value instanceof Float64Array ||
     value instanceof Int8Array ||

src/estree-util-value-to-estree.ts

@@ -2,6 +2,7 @@ import assert from 'node:assert/strict'
 import { test } from 'node:test'
 
 import { Temporal as LocalTemporal } from '@js-temporal/polyfill'
+import { Float16Array } from '@petamoriken/float16'
 import { generate } from 'astring'
 import { valueToEstree } from 'estree-util-value-to-estree'
 import { testFixturesDirectory } from 'snapshot-fixtures'
@@ -10,6 +11,8 @@ declare global {
   // eslint-disable-next-line no-var, @typescript-eslint/naming-convention
   var Temporal: typeof LocalTemporal
 }
+
+globalThis.Float16Array ??= Float16Array
 globalThis.Temporal = LocalTemporal
 
 testFixturesDirectory({

src/test.ts

@@ -3,7 +3,7 @@
     "composite": true,
     "declaration": true,
     "declarationMap": true,
-    "lib": ["es2022"],
+    "lib": ["es2022", "esnext.float16"],
     "module": "node16",
     "noImplicitAny": true,
     "rootDir": "src",