Merge pull request #4145 from tc39/chromium-export-99eec8f4a2

[explicit-resource-management] Add await using to the bytecode generator

test/staging/explicit-resource-management/await-using-in-async-function-call-with-await.js

@@ -0,0 +1,33 @@
+// Copyright (C) 2024 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Test if disposed methods are called correctly in async function.
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [explicit-resource-management]
+---*/
+
+// FunctionBody --------------
+asyncTest(async function() {
+  let functionBodyValues = [];
+
+  async function TestUsingInFunctionBody() {
+    await using x = {
+      value: 1,
+      [Symbol.asyncDispose]() {
+        functionBodyValues.push(42);
+      }
+    };
+    await using y = {
+      value: 2,
+      [Symbol.asyncDispose]() {
+        functionBodyValues.push(43);
+      }
+    };
+  }
+
+  functionBodyValues = [];
+  await TestUsingInFunctionBody();
+  assert.compareArray(functionBodyValues, [43, 42]);
+});

test/staging/explicit-resource-management/await-using-in-async-function-call-without-await.js

@@ -0,0 +1,32 @@
+// Copyright (C) 2024 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Test if disposed methods are called correctly in async function.
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [explicit-resource-management]
+---*/
+
+// FunctionBody --------------
+asyncTest(async function() {
+  let functionBodyValues = [];
+
+  async function TestUsingInFunctionBody() {
+    await using x = {
+      value: 1,
+      [Symbol.asyncDispose]() {
+        functionBodyValues.push(42);
+      }
+    };
+    await using y = {
+      value: 2,
+      [Symbol.asyncDispose]() {
+        functionBodyValues.push(43);
+      }
+    };
+  }
+
+  TestUsingInFunctionBody();
+  assert.compareArray(functionBodyValues, [43]);
+});

test/staging/explicit-resource-management/await-using-in-block.js

@@ -0,0 +1,32 @@
+// Copyright (C) 2024 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Test if disposed methods are called correctly in a block.
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [explicit-resource-management]
+---*/
+
+// Block ----------------
+asyncTest(async function() {
+  let blockValues = [];
+
+  {
+    await using x = {
+      value: 1,
+      [Symbol.asyncDispose]() {
+        blockValues.push(42);
+      }
+    };
+    await using y = {
+      value: 1,
+      [Symbol.asyncDispose]() {
+        blockValues.push(43);
+      }
+    };
+    blockValues.push(44);
+  }
+
+  assert.compareArray(blockValues, [44, 43, 42]);
+});

test/staging/explicit-resource-management/await-using-in-for-in-statement.js

@@ -0,0 +1,26 @@
+// Copyright (C) 2024 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Test if disposed methods are called correctly in for-in statement.
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [explicit-resource-management]
+---*/
+
+// ForInStatement --------------
+asyncTest(async function() {
+  let forInStatementValues = [];
+
+  for (let i in [0, 1]) {
+    await using x = {
+      value: i,
+      [Symbol.asyncDispose]() {
+        forInStatementValues.push(this.value);
+      }
+    };
+  }
+  forInStatementValues.push('2');
+
+  assert.compareArray(forInStatementValues, ['0', '1', '2']);
+});

test/staging/explicit-resource-management/await-using-in-for-of-statement.js

@@ -0,0 +1,27 @@
+
+// Copyright (C) 2024 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Test if disposed methods are called correctly in for-of statement.
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [explicit-resource-management]
+---*/
+
+// ForOfStatement --------------
+asyncTest(async function() {
+  let forOfStatementValues = [];
+
+  for (let i of [0, 1]) {
+    await using x = {
+      value: i,
+      [Symbol.asyncDispose]() {
+        forOfStatementValues.push(this.value);
+      }
+    };
+  }
+  forOfStatementValues.push(2);
+
+  assert.compareArray(forOfStatementValues, [0, 1, 2]);
+});

test/staging/explicit-resource-management/await-using-in-for-statement.js

@@ -0,0 +1,26 @@
+// Copyright (C) 2024 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Test if disposed methods are called correctly in for statements.
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [explicit-resource-management]
+---*/
+
+// ForStatement --------------
+asyncTest(async function() {
+  let forStatementValues = [];
+
+  for (let i = 0; i < 3; i++) {
+    await using x = {
+      value: i,
+      [Symbol.asyncDispose]() {
+        forStatementValues.push(this.value);
+      }
+    };
+  }
+  forStatementValues.push(3);
+
+  assert.compareArray(forStatementValues, [0, 1, 2, 3]);
+});

test/staging/explicit-resource-management/await-using-in-switch-case-block.js

@@ -0,0 +1,28 @@
+// Copyright (C) 2024 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Test if disposed methods are called correctly in switch cases.
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [explicit-resource-management]
+---*/
+
+// CaseBlock --------------
+asyncTest(async function() {
+  let caseBlockValues = [];
+
+  let label = 1;
+  switch (label) {
+    case 1:
+      await using x = {
+        value: 1,
+        [Symbol.asyncDispose]() {
+          caseBlockValues.push(42);
+        }
+      };
+  }
+  caseBlockValues.push(43);
+
+  assert.compareArray(caseBlockValues, [42, 43]);
+});

test/staging/explicit-resource-management/await-using-with-no-async-dispose-method.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2024 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Test if exception is throwon when dispose method is missing.
+includes: [asyncHelpers.js]
+flags: [async]
+features: [explicit-resource-management]
+---*/
+
+// Lack of dispose method --------
+asyncTest(async function() {
+  let values = [];
+
+  async function TestUsingWithoutDisposeMethod() {
+    {
+      await using x = {value: 1};
+      values.push(43);
+    }
+  };
+  await assert.throwsAsync(
+      TypeError, () => TestUsingWithoutDisposeMethod(), 'No dispose method');
+});

test/staging/explicit-resource-management/await-using-with-sync-dispose-method.js

@@ -0,0 +1,32 @@
+// Copyright (C) 2024 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Test if Symbol.dispose is called correctly.
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [explicit-resource-management]
+---*/
+
+// sync dispose method ----------------
+asyncTest(async function() {
+  let syncMethodValues = [];
+
+  {
+    await using x = {
+      value: 1,
+      [Symbol.dispose]() {
+        syncMethodValues.push(42);
+      }
+    };
+    await using y = {
+      value: 1,
+      [Symbol.dispose]() {
+        syncMethodValues.push(43);
+      }
+    };
+    syncMethodValues.push(44);
+  }
+
+  assert.compareArray(syncMethodValues, [44, 43, 42]);
+});

test/staging/explicit-resource-management/mixed-call-dispose-methods.js

@@ -0,0 +1,32 @@
+// Copyright (C) 2024 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Test if disposed methods are called correctly with mixed resources
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [explicit-resource-management]
+---*/
+
+// Mix of sync and async resources ----------
+asyncTest(async function() {
+  let mixValues = [];
+
+  {
+    await using x = {
+      value: 1,
+      [Symbol.asyncDispose]() {
+        mixValues.push(42);
+      }
+    };
+    using y = {
+      value: 1,
+      [Symbol.dispose]() {
+        mixValues.push(43);
+      }
+    };
+    mixValues.push(44);
+  }
+
+  assert.compareArray(mixValues, [44, 43, 42]);
+});