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42 lines
1.4 KiB
JavaScript
42 lines
1.4 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-prepareforordinarycall
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description: >
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Creation of new variable environment for the function parameters and body
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(as distinct from that for the function's BindingIdentifier)
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info: |
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[...]
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3. Let callerContext be the running execution context.
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4. Let calleeContext be PrepareForOrdinaryCall(F, undefined).
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[...]
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9.2.1.1 PrepareForOrdinaryCall
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[...]
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8. Let localEnv be NewFunctionEnvironment(F, newTarget).
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9. Set the LexicalEnvironment of calleeContext to localEnv.
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10. Set the VariableEnvironment of calleeContext to localEnv.
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[...]
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---*/
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var n = 'outside';
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var probeBefore = function() { return n; };
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var probeBody;
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// This test intentionally elides parameter expressions because their presence
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// triggers the creation of an additional LexicalEnvironment dedicated to the
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// function body (see sec-functiondeclarationinstantiation)
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var func = function n() {
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// The initializer is intentionally omitted from the following
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// VariableStatement in order to demonstrate that a new binding is created
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// (and not simply re-used from the FunctionExpression's BindingIdentifier).
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var n;
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probeBody = function() { return n; };
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};
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func();
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assert.sameValue(probeBefore(), 'outside');
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assert.sameValue(probeBody(), undefined);
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