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b3092c61b6
* Add missing generators feature flags * Generate files * Add generators flags * fixup! Add generators flags
55 lines
2.1 KiB
JavaScript
55 lines
2.1 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-functiondeclarationinstantiation
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description: >
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Creation of new lexical environment (distinct from the variable
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environment) for the function body outside of strict mode
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info: |
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[...]
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29. If strict is false, then
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a. Let lexEnv be NewDeclarativeEnvironment(varEnv).
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b. NOTE: Non-strict functions use a separate lexical Environment Record
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for top-level lexical declarations so that a direct eval can
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determine whether any var scoped declarations introduced by the eval
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code conflict with pre-existing top-level lexically scoped
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declarations. This is not needed for strict functions because a
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strict direct eval always places all declarations into a new
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Environment Record.
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[...]
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18.2.1.3 Runtime Semantics: EvalDeclarationInstantiation
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[...]
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5. If strict is false, then
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[...]
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b. Let thisLex be lexEnv.
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c. Assert: The following loop will terminate.
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d. Repeat while thisLex is not the same as varEnv,
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i. Let thisEnvRec be thisLex's EnvironmentRecord.
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ii. If thisEnvRec is not an object Environment Record, then
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1. NOTE: The environment of with statements cannot contain any
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lexical declaration so it doesn't need to be checked for
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var/let hoisting conflicts.
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2. For each name in varNames, do
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a. If thisEnvRec.HasBinding(name) is true, then
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i. Throw a SyntaxError exception.
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ii. NOTE: Annex B.3.5 defines alternate semantics for the
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above step.
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b. NOTE: A direct eval will not hoist var declaration over a
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like-named lexical declaration.
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iii. Let thisLex be thisLex's outer environment reference.
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flags: [noStrict]
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features: [generators, let]
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---*/
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var g = function*() {
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let x;
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eval('var x;');
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};
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var iter = g();
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assert.throws(SyntaxError, function() {
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iter.next();
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});
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