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b3092c61b6
* Add missing generators feature flags * Generate files * Add generators flags * fixup! Add generators flags
52 lines
1.6 KiB
JavaScript
52 lines
1.6 KiB
JavaScript
// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-generator-function-definitions-runtime-semantics-evaluation
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description: >
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Creation of new variable environment for the BindingIdentifier
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parameter
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info: |
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[...]
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2. Let scope be the running execution context's LexicalEnvironment.
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3. Let funcEnv be NewDeclarativeEnvironment(scope).
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4. Let envRec be funcEnv's EnvironmentRecord.
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5. Let name be StringValue of BindingIdentifier.
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6. Perform envRec.CreateImmutableBinding(name, false).
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7. Let closure be GeneratorFunctionCreate(Normal, FormalParameters,
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GeneratorBody, funcEnv, strict).
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[...]
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flags: [noStrict]
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features: [generators]
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---*/
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var g = 'outside';
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var probeBefore = function() { return g; };
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var setBefore = function() { g = null; };
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var probeParams, setParams, probeBody, setBody;
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var func = function* g(
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_ = (
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probeParams = function() { return g; },
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setParams = function() { g = null; }
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)
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) {
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probeBody = function() { return g; };
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setBody = function() { g = null; };
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};
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func().next();
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assert.sameValue(probeBefore(), 'outside');
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setBefore();
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assert.sameValue(probeBefore(), null);
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assert.sameValue(probeParams(), func, 'inner binding value (from parameters)');
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setParams();
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assert.sameValue(
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probeParams(), func, 'inner binding is immutable (from parameters)'
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);
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assert.sameValue(probeBody(), func, 'inner binding value (from body)');
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setBody();
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assert.sameValue(probeBody(), func, 'inner binding is immutable (from body)');
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