Merge branch 'main' of https://github.com/microsoft/TypeScript into 60881

Author: NamHaiBui

package-lock.json

@@ -2,7 +2,7 @@
     "name": "typescript",
     "author": "Microsoft Corp.",
     "homepage": "https://www.typescriptlang.org/",
-    "version": "5.8.0",
+    "version": "5.9.0",
     "license": "Apache-2.0",
     "description": "TypeScript is a language for application scale JavaScript development",
     "keywords": [

package.json

@@ -47981,7 +47981,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
             return;
         }
 
-        if (compilerOptions.erasableSyntaxOnly && !(node.flags & NodeFlags.Ambient)) {
+        if (compilerOptions.erasableSyntaxOnly && node.isExportEquals && !(node.flags & NodeFlags.Ambient)) {
             error(node, Diagnostics.This_syntax_is_not_allowed_when_erasableSyntaxOnly_is_enabled);
         }
         const container = node.parent.kind === SyntaxKind.SourceFile ? node.parent : node.parent.parent as ModuleDeclaration;

src/compiler/checker.ts

@@ -1,6 +1,6 @@
 // WARNING: The script `configurePrerelease.ts` uses a regexp to parse out these values.
 // If changing the text in this section, be sure to test `configurePrerelease` too.
-export const versionMajorMinor = "5.8";
+export const versionMajorMinor = "5.9";
 // The following is baselined as a literal template type without intervention
 /** The version of the TypeScript compiler release */
 export const version: string = `${versionMajorMinor}.0-dev`;

src/compiler/corePublic.ts

@@ -3634,7 +3634,7 @@ declare namespace ts {
             readDirectory(rootDir: string, extensions: readonly string[], excludes: readonly string[] | undefined, includes: readonly string[] | undefined, depth?: number): string[];
         }
     }
-    const versionMajorMinor = "5.8";
+    const versionMajorMinor = "5.9";
     /** The version of the TypeScript compiler release */
     const version: string;
     /**

tests/baselines/reference/api/typescript.d.ts

@@ -104,4 +104,9 @@ index.ts(28,12): error TS1294: This syntax is not allowed when 'erasableSyntaxOn
 ==== other.d.cts (0 errors) ====
     declare function foo(): void;
     export = foo;
+    
+    
+==== esm.mts (0 errors) ====
+    const foo = 1234;
+    export default foo;
 

tests/baselines/reference/erasableSyntaxOnly.errors.txt

@@ -74,6 +74,11 @@ export = foo;
 //// [other.d.cts]
 declare function foo(): void;
 export = foo;
+
+
+//// [esm.mts]
+const foo = 1234;
+export default foo;
 
 
 //// [index.js]
@@ -119,3 +124,6 @@ var MyClassOk = /** @class */ (function () {
 "use strict";
 var foo = require("./other.cjs");
 module.exports = foo;
+//// [esm.mjs]
+var foo = 1234;
+export default foo;

tests/baselines/reference/erasableSyntaxOnly.js

@@ -133,3 +133,11 @@ declare function foo(): void;
 export = foo;
 >foo : Symbol(foo, Decl(other.d.cts, 0, 0))
 
+
+=== esm.mts ===
+const foo = 1234;
+>foo : Symbol(foo, Decl(esm.mts, 0, 5))
+
+export default foo;
+>foo : Symbol(foo, Decl(esm.mts, 0, 5))
+

tests/baselines/reference/erasableSyntaxOnly.symbols

@@ -179,3 +179,15 @@ export = foo;
 >foo : () => void
 >    : ^^^^^^    
 
+
+=== esm.mts ===
+const foo = 1234;
+>foo : 1234
+>    : ^^^^
+>1234 : 1234
+>     : ^^^^
+
+export default foo;
+>foo : 1234
+>    : ^^^^
+

tests/baselines/reference/erasableSyntaxOnly.types

@@ -65,4 +65,9 @@ index.d.ts(1,1): error TS1046: Top-level declarations in .d.ts files must start
 ==== other.d.cts (0 errors) ====
     declare function foo(): void;
     export = foo;
+    
+    
+==== esm.d.mts (0 errors) ====
+    declare const foo = 1234;
+    export default foo;