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112 lines
2.8 KiB
JavaScript
112 lines
2.8 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-for-statement-runtime-semantics-labelledevaluation
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description: >
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No variable environment is created for each evaluation of the statement
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body
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info: |
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[...]
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11. Let bodyResult be ForBodyEvaluation(the first Expression, the second
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Expression, Statement, perIterationLets, labelSet).
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[...]
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13.7.4.8 Runtime Semantics: ForBodyEvaluation
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[...]
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2. Perform ? CreatePerIterationEnvironment(perIterationBindings).
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3. Repeat
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[...]
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b. Let result be the result of evaluating stmt.
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[...]
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e. Perform ? CreatePerIterationEnvironment(perIterationBindings).
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[...]
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13.7.4.9 Runtime Semantics: CreatePerIterationEnvironment
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1. If perIterationBindings has any elements, then
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[...]
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e. Let thisIterationEnv be NewDeclarativeEnvironment(outer).
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f. Let thisIterationEnvRec be thisIterationEnv's EnvironmentRecord.
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flags: [noStrict]
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---*/
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var probeBefore = function() { return [x, y, z]; };
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var probeTest, probeIncr, probeBody;
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var run = true;
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for (
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;
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run && (eval('var x = 1;'), probeTest = function() { return [x, y, z]; });
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eval('var y = 1;'), probeIncr = function() { return [x, y, z]; }
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)
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var z = 1, _ = (probeBody = function() { return [x, y, z]; }), run = false;
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var x = 2;
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var y = 2;
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var z = 2;
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assert.sameValue(
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probeBefore()[0],
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2,
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'reference preceding statement (redeclared in "test" position)'
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);
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assert.sameValue(
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probeBefore()[1],
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2,
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'reference preceding statement (redeclared in statement body)'
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);
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assert.sameValue(
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probeBefore()[2],
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2,
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'reference preceding statement (redeclared in "increment" position)'
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);
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assert.sameValue(
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probeTest()[0],
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2,
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'reference from "test" position (redeclared in "test" position)'
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);
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assert.sameValue(
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probeTest()[1],
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2,
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'reference from "test" position (redeclared in statement body)'
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);
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assert.sameValue(
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probeTest()[2],
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2,
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'reference from "test" position (redeclared in "increment" position)'
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);
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assert.sameValue(
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probeBody()[0],
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2,
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'reference from statement body (redeclared in "test" position)'
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);
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assert.sameValue(
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probeBody()[1],
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2,
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'reference from statement body (redeclared in statement body)'
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);
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assert.sameValue(
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probeBody()[2],
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2,
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'reference from statement body (redeclared in "increment" position)'
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);
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assert.sameValue(
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probeIncr()[0],
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2,
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'reference from "increment" position (redeclared in "test" position)'
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);
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assert.sameValue(
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probeIncr()[1],
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2,
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'reference from "increment" position (redeclared in statement body)'
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);
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assert.sameValue(
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probeIncr()[2],
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2,
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'reference from "increment" position (redeclared in "increment" position)'
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);
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