6390282f96
Annex B 3.3 applies only for ordinary FunctionDeclarations, not GeneratorDeclarations or AsyncFunctionDeclarations. This patch - Skips applying Annex B 3.3 to async functions - Adds a flag to refrain from applying it to generators - UseCounter for how often duplicate function in block occurs with generators (unclear how to measure need for hoisting from block) BUG=v8:4806 Review-Url: https://codereview.chromium.org/1995863002 Cr-Commit-Position: refs/heads/master@{#36557}
61 lines
1.4 KiB
JavaScript
61 lines
1.4 KiB
JavaScript
// Copyright 2016 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --no-harmony-restrictive-generators
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// In legacy mode, generators get sloppy-mode block-scoped function hoisting
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// Hoisting to the global scope
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{
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function* foo() {}
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assertEquals('function', typeof foo);
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}
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//assertEquals('function', typeof foo);
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// Hoisting within a function scope
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(function() {
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{ function* bar() {} }
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assertEquals('function', typeof bar);
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})();
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// Lexical shadowing allowed; hoisting happens
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(function() {
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function* x() { yield 1; }
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{ function* x() { yield 2 } }
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assertEquals(2, x().next().value);
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})();
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// Duplicates allowed
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(function() {
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function* y() { yield 1; }
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function* y() { yield 2 }
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assertEquals(2, y().next().value);
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})();
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// Functions and generators may duplicate each other
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(function() {
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function* z() { yield 1; }
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function z() { return 2 }
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assertEquals(2, z());
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function a() { return 1; }
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function* a() { yield 2 }
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assertEquals(2, a().next().value);
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})();
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// In strict mode, none of this happens
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(function() {
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'use strict';
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{ function* bar() {} }
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assertEquals('undefined', typeof bar);
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// Lexical shadowing allowed; hoisting happens
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function* x() { yield 1; }
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{ function* x() { yield 2 } }
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assertEquals(1, x().next().value);
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})();
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