mirror of https://github.com/tc39/test262.git
55 lines
2.1 KiB
JavaScript
55 lines
2.1 KiB
JavaScript
// Copyright (C) 2016 the V8 project authors. All rights reserved.
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
|
/*---
|
|
esid: sec-functiondeclarationinstantiation
|
|
description: >
|
|
Creation of new lexical environment (distinct from the variable
|
|
environment) for the function body outside of strict mode
|
|
info: |
|
|
[...]
|
|
29. If strict is false, then
|
|
a. Let lexEnv be NewDeclarativeEnvironment(varEnv).
|
|
b. NOTE: Non-strict functions use a separate lexical Environment Record
|
|
for top-level lexical declarations so that a direct eval can
|
|
determine whether any var scoped declarations introduced by the eval
|
|
code conflict with pre-existing top-level lexically scoped
|
|
declarations. This is not needed for strict functions because a
|
|
strict direct eval always places all declarations into a new
|
|
Environment Record.
|
|
[...]
|
|
|
|
18.2.1.3 Runtime Semantics: EvalDeclarationInstantiation
|
|
|
|
[...]
|
|
5. If strict is false, then
|
|
[...]
|
|
b. Let thisLex be lexEnv.
|
|
c. Assert: The following loop will terminate.
|
|
d. Repeat while thisLex is not the same as varEnv,
|
|
i. Let thisEnvRec be thisLex's EnvironmentRecord.
|
|
ii. If thisEnvRec is not an object Environment Record, then
|
|
1. NOTE: The environment of with statements cannot contain any
|
|
lexical declaration so it doesn't need to be checked for
|
|
var/let hoisting conflicts.
|
|
2. For each name in varNames, do
|
|
a. If thisEnvRec.HasBinding(name) is true, then
|
|
i. Throw a SyntaxError exception.
|
|
ii. NOTE: Annex B.3.5 defines alternate semantics for the
|
|
above step.
|
|
b. NOTE: A direct eval will not hoist var declaration over a
|
|
like-named lexical declaration.
|
|
iii. Let thisLex be thisLex's outer environment reference.
|
|
flags: [noStrict]
|
|
features: [generators, let]
|
|
---*/
|
|
|
|
function* g() {
|
|
let x;
|
|
eval('var x;');
|
|
}
|
|
var iter = g();
|
|
|
|
assert.throws(SyntaxError, function() {
|
|
iter.next();
|
|
});
|