feat: explicit resource management in TypeScript

Cargo.toml

@@ -38,7 +38,7 @@ license = "MIT"
 repository = "https://github.com/denoland/deno"
 
 [workspace.dependencies]
-deno_ast = { version = "0.29.1", features = ["transpiling"] }
+deno_ast = { version = "0.29.3", features = ["transpiling"] }
 
 deno_core = { version = "0.211.0" }
 

cli/tests/integration/run_tests.rs

@@ -4701,3 +4701,8 @@ console.log(returnsHi());"#,
 ")
     .assert_exit_code(1);
 }
+
+itest!(explicit_resource_management {
+  args: "run --quiet --check run/explicit_resource_management/main.ts",
+  output: "run/explicit_resource_management/main.out",
+});

cli/tests/testdata/run/explicit_resource_management/main.out

@@ -0,0 +1,5 @@
+A
+Disposed
+B
+Async disposed
+C

cli/tests/testdata/run/explicit_resource_management/main.ts

@@ -0,0 +1,21 @@
+class Resource {
+  [Symbol.dispose]() {
+    console.log("Disposed");
+  }
+}
+class AsyncResource {
+  async [Symbol.asyncDispose]() {
+    await new Promise((resolve) => setTimeout(resolve, 10));
+    console.log("Async disposed");
+  }
+}
+
+{
+  using resource = new Resource();
+  console.log("A");
+}
+{
+  await using resource = new AsyncResource();
+  console.log("B");
+}
+console.log("C");

runtime/js/99_main.js

@@ -71,6 +71,11 @@ import {
   workerRuntimeGlobalProperties,
 } from "ext:runtime/98_global_scope.js";
 
+// deno-lint-ignore prefer-primordials
+Symbol.dispose ??= Symbol("Symbol.dispose");
+// deno-lint-ignore prefer-primordials
+Symbol.asyncDispose ??= Symbol("Symbol.asyncDispose");
+
 let windowIsClosing = false;
 let globalThis_;