Support TypeScript 5.2 using / await using declaration

changelog_unreleased/typescript/15321.md

@@ -0,0 +1,11 @@
+#### Support TypeScript 5.2 `using` / `await using` declaration (#15321 by @sosukesuzuki)
+
+Support for the upcoming Explicit Resource Management feature in ECMAScript. [`using` / `await using` declaration](https://devblogs.microsoft.com/typescript/announcing-typescript-5-2/#using-declarations-and-explicit-resource-management)
+
+<!-- prettier-ignore -->
+```tsx
+{
+   using foo = new Foo();
+   await using bar = new Bar();
+}
+```

package.json

@@ -38,8 +38,8 @@
     "@iarna/toml": "2.2.5",
     "@prettier/is-es5-identifier-name": "0.2.0",
     "@prettier/parse-srcset": "3.1.0",
-    "@typescript-eslint/typescript-estree": "6.4.1",
-    "@typescript-eslint/visitor-keys": "6.4.1",
+    "@typescript-eslint/typescript-estree": "6.5.0",
+    "@typescript-eslint/visitor-keys": "6.5.0",
     "acorn": "8.10.0",
     "acorn-jsx": "5.3.2",
     "angular-estree-parser": "7.0.0",
@@ -98,7 +98,7 @@
     "sdbm": "2.0.0",
     "strip-ansi": "7.1.0",
     "to-fast-properties": "4.0.0",
-    "typescript": "5.1.6",
+    "typescript": "5.2.2",
     "unicode-regex": "4.0.0",
     "unified": "9.2.2",
     "vnopts": "2.0.0",
@@ -112,7 +112,7 @@
     "@types/file-entry-cache": "5.0.2",
     "@types/find-cache-dir": "3.2.1",
     "@types/jest": "29.5.4",
-    "@typescript-eslint/eslint-plugin": "6.4.1",
+    "@typescript-eslint/eslint-plugin": "6.5.0",
     "benchmark": "2.1.4",
     "browserslist-to-esbuild": "1.2.0",
     "c8": "8.0.1",

tests/format/js/explicit-resource-management/__snapshots__/jsfmt.spec.js.snap

@@ -28,13 +28,6 @@ exports[`for-await-using-of-comments.js [meriyah] format 1`] = `
   2 |"
 `;
 
-exports[`for-await-using-of-comments.js [typescript] format 1`] = `
-"'of' expected. (1:51)
-> 1 | /*1*/ for /* 2 */ await /*3*/ ( /*4*/ using /*5*/ fo /*6*/ of /*7*/ of /*8*/) /*9*/;
-    |                                                   ^
-  2 |"
-`;
-
 exports[`for-await-using-of-comments.js format 1`] = `
 ====================================options=====================================
 parsers: ["babel", "flow", "typescript"]
@@ -90,10 +83,10 @@ exports[`invalid-duplicate-using-bindings.js [meriyah] format 1`] = `
 `;
 
 exports[`invalid-duplicate-using-bindings.js [typescript] format 1`] = `
-"Unexpected keyword or identifier. (2:3)
+"'using' declarations must be initialized. (2:9)
   1 | {
 > 2 |   using f, f = foo();
-    |   ^
+    |         ^
   3 | }
   4 | {
   5 |   using g = foo();"
@@ -154,13 +147,6 @@ exports[`invalid-script-top-level-using-binding.js [meriyah] format 1`] = `
   2 |"
 `;
 
-exports[`invalid-script-top-level-using-binding.js [typescript] format 1`] = `
-"Unexpected keyword or identifier. (1:1)
-> 1 | using x = bar();
-    | ^
-  2 |"
-`;
-
 exports[`invalid-script-top-level-using-binding.js format 1`] = `
 ====================================options=====================================
 parsers: ["babel", "flow", "typescript"]
@@ -216,13 +202,14 @@ exports[`using-declarations.js [meriyah] format 1`] = `
 `;
 
 exports[`using-declarations.js [typescript] format 1`] = `
-"Unexpected keyword or identifier. (2:3)
-  1 | {
-> 2 |   using /* 1 */ a = foo(), /* 2 */ b = foo()
-    |   ^
+"'using' declarations may not be initialized in for statement. (5:19)
   3 | }
   4 |
-  5 | for(using /* 1 */ a = foo(), /* 2 */ b = foo();;);"
+> 5 | for(using /* 1 */ a = foo(), /* 2 */ b = foo();;);
+    |                   ^^^^^^^^^
+  6 |
+  7 | for(using /* 1 */ foo of bar());
+  8 |"
 `;
 
 exports[`using-declarations.js format 1`] = `
@@ -364,15 +351,6 @@ exports[`valid-await-using-binding-basic.js [meriyah] format 1`] = `
   4 |"
 `;
 
-exports[`valid-await-using-binding-basic.js [typescript] format 1`] = `
-"';' expected. (2:15)
-  1 | async function f() {
-> 2 |   await using basic = getReader();
-    |               ^
-  3 | }
-  4 |"
-`;
-
 exports[`valid-await-using-binding-basic.js format 1`] = `
 ====================================options=====================================
 parsers: ["babel", "flow", "typescript"]
@@ -427,15 +405,6 @@ exports[`valid-await-using-binding-escaped.js [meriyah] format 1`] = `
   4 |"
 `;
 
-exports[`valid-await-using-binding-escaped.js [typescript] format 1`] = `
-"';' expected. (2:15)
-  1 | async function f() {
-> 2 |   await using \\u0061b = c;
-    |               ^
-  3 | }
-  4 |"
-`;
-
 exports[`valid-await-using-binding-escaped.js format 1`] = `
 ====================================options=====================================
 parsers: ["babel", "flow", "typescript"]
@@ -490,15 +459,6 @@ exports[`valid-await-using-binding-non-bmp.js [meriyah] format 1`] = `
   4 |"
 `;
 
-exports[`valid-await-using-binding-non-bmp.js [typescript] format 1`] = `
-"';' expected. (2:15)
-  1 | async function f() {
-> 2 |   await using 𠮷 = foo();
-    |               ^
-  3 | }
-  4 |"
-`;
-
 exports[`valid-await-using-binding-non-bmp.js format 1`] = `
 ====================================options=====================================
 parsers: ["babel", "flow", "typescript"]
@@ -557,16 +517,6 @@ exports[`valid-await-using-binding-using.js [meriyah] format 1`] = `
   5 |"
 `;
 
-exports[`valid-await-using-binding-using.js [typescript] format 1`] = `
-"';' expected. (2:15)
-  1 | async function f() {
-> 2 |   await using using = of;
-    |               ^
-  3 |   for (await using using of of);
-  4 | }
-  5 |"
-`;
-
 exports[`valid-await-using-binding-using.js format 1`] = `
 ====================================options=====================================
 parsers: ["babel", "flow", "typescript"]
@@ -632,14 +582,14 @@ exports[`valid-await-using-comments.js [meriyah] format 1`] = `
 `;
 
 exports[`valid-await-using-comments.js [typescript] format 1`] = `
-"';' expected. (3:28)
-  1 | async function f() {
-  2 | {
-> 3 |   /*0*/await/*1*/using/*2*/b/*3*/=/*4*/f()/*5*/;
-    |                            ^
+"'await using' declarations may not be initialized in for statement. (6:42)
   4 | }
   5 | {
-  6 |   /*0*/for/*1*/(/*2*/await/*3*/using/*4*/b/*5*/=/*6*/x/*7*/;/*8*/;/*9*/)/*10*/;"
+> 6 |   /*0*/for/*1*/(/*2*/await/*3*/using/*4*/b/*5*/=/*6*/x/*7*/;/*8*/;/*9*/)/*10*/;
+    |                                          ^^^^^^^^^^^^^
+  7 | }
+  8 | {
+  9 |   /*0*/for/*1*/(/*2*/await/*3*/using/*4*/b/*5*/of/*6*/x/*7*/)/*8*/;"
 `;
 
 exports[`valid-await-using-comments.js format 1`] = `
@@ -826,10 +776,10 @@ exports[`valid-for-using-declaration.js [meriyah] format 1`] = `
 `;
 
 exports[`valid-for-using-declaration.js [typescript] format 1`] = `
-"';' expected. (2:20)
+"'await using' declarations may not be initialized in for statement. (2:20)
   1 | async function f() {
 > 2 |   for (await using basic = reader();;);
-    |                    ^
+    |                    ^^^^^^^^^^^^^^^^
   3 | }
   4 |"
 `;
@@ -1137,15 +1087,6 @@ exports[`valid-using-binding-basic.js [meriyah] format 1`] = `
   4 |"
 `;
 
-exports[`valid-using-binding-basic.js [typescript] format 1`] = `
-"Unexpected keyword or identifier. (2:3)
-  1 | {
-> 2 |   using basic = getReader();
-    |   ^
-  3 | }
-  4 |"
-`;
-
 exports[`valid-using-binding-basic.js format 1`] = `
 ====================================options=====================================
 parsers: ["babel", "flow", "typescript"]
@@ -1192,13 +1133,6 @@ exports[`valid-using-binding-escaped.js [meriyah] format 1`] = `
   2 |"
 `;
 
-exports[`valid-using-binding-escaped.js [typescript] format 1`] = `
-"Unexpected keyword or identifier. (1:3)
-> 1 | { using \\u0061b = c; }
-    |   ^
-  2 |"
-`;
-
 exports[`valid-using-binding-escaped.js format 1`] = `
 ====================================options=====================================
 parsers: ["babel", "flow", "typescript"]
@@ -1243,13 +1177,6 @@ exports[`valid-using-binding-non-bmp.js [meriyah] format 1`] = `
   2 |"
 `;
 
-exports[`valid-using-binding-non-bmp.js [typescript] format 1`] = `
-"Unexpected keyword or identifier. (1:3)
-> 1 | { using 𠮷 = foo(); }
-    |   ^
-  2 |"
-`;
-
 exports[`valid-using-binding-non-bmp.js format 1`] = `
 ====================================options=====================================
 parsers: ["babel", "flow", "typescript"]
@@ -1306,16 +1233,6 @@ exports[`valid-using-binding-using.js [meriyah] format 1`] = `
   5 |"
 `;
 
-exports[`valid-using-binding-using.js [typescript] format 1`] = `
-"Unexpected keyword or identifier. (2:3)
-  1 | {
-> 2 |   using using = of;
-    |   ^
-  3 |   for (using using of of);
-  4 | }
-  5 |"
-`;
-
 exports[`valid-using-binding-using.js format 1`] = `
 ====================================options=====================================
 parsers: ["babel", "flow", "typescript"]

tests/format/js/explicit-resource-management/jsfmt.spec.js

@@ -7,6 +7,7 @@ run_spec(import.meta, ["babel", "flow", "typescript"], {
       "using-declarations.js",
       // "valid-for-await-using-binding-escaped-of-of.js",
       // "valid-for-using-binding-escaped-of-of.js",
+      "invalid-using-declaration-in-for.js",
       "valid-module-block-top-level-using-binding.js",
       "valid-using-as-identifier-for-await-of.js",
       "valid-using-binding-basic.js",
@@ -25,26 +26,19 @@ run_spec(import.meta, ["babel", "flow", "typescript"], {
       "valid-module-block-top-level-await-using-binding.js",
     ],
     typescript: [
-      "for-await-using-of-comments.js",
       "invalid-duplicate-using-bindings.js",
-      "invalid-script-top-level-using-binding.js",
-      "using-declarations.js",
-      // "valid-for-await-using-binding-escaped-of-of.js",
-      // "valid-for-using-binding-escaped-of-of.js",
-      "valid-module-block-top-level-using-binding.js",
-      "valid-using-binding-basic.js",
-      "valid-using-binding-escaped.js",
-      "valid-using-binding-non-bmp.js",
-      "valid-using-binding-using.js",
+      "invalid-using-declaration-in-for.js",
 
-      "valid-await-using-binding-basic.js",
-      "valid-await-using-binding-escaped.js",
-      "valid-await-using-binding-non-bmp.js",
-      "valid-await-using-binding-using.js",
+      // https://github.com/typescript-eslint/typescript-eslint/blob/4f34d0ba34474926ba1eed623704b583a037f886/packages/typescript-estree/src/convert.ts#L1035-L1050
+      "valid-for-using-declaration.js",
       "valid-await-using-comments.js",
-      "valid-for-lhs-await-as-identifier.js",
+      "using-declarations.js",
+
+      // https://github.com/microsoft/TypeScript/issues/55555
       "valid-for-using-binding-of-of.js",
-      "valid-for-using-declaration.js",
+
+      // TypeScript does not support module expr
+      "valid-module-block-top-level-using-binding.js",
       "valid-module-block-top-level-await-using-binding.js",
     ],
     espree: [
@@ -54,6 +48,7 @@ run_spec(import.meta, ["babel", "flow", "typescript"], {
       "using-declarations.js",
       // "valid-for-await-using-binding-escaped-of-of.js",
       // "valid-for-using-binding-escaped-of-of.js",
+      "invalid-using-declaration-in-for.js",
       "valid-module-block-top-level-using-binding.js",
       "valid-using-binding-basic.js",
       "valid-using-binding-escaped.js",
@@ -77,6 +72,7 @@ run_spec(import.meta, ["babel", "flow", "typescript"], {
       "using-declarations.js",
       // "valid-for-await-using-binding-escaped-of-of.js",
       // "valid-for-using-binding-escaped-of-of.js",
+      "invalid-using-declaration-in-for.js",
       "valid-module-block-top-level-using-binding.js",
       "valid-using-binding-basic.js",
       "valid-using-binding-escaped.js",
@@ -100,6 +96,7 @@ run_spec(import.meta, ["babel", "flow", "typescript"], {
       "using-declarations.js",
       // "valid-for-await-using-binding-escaped-of-of.js",
       // "valid-for-using-binding-escaped-of-of.js",
+      "invalid-using-declaration-in-for.js",
       "valid-module-block-top-level-using-binding.js",
       "valid-using-binding-basic.js",
       "valid-using-binding-escaped.js",