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// |reftest| module
// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
description: >
Imported binding reflects state of exported `var` binding when ImportsList
has a trailing comma
esid: sec-moduledeclarationinstantiation
info: |
[...]
12. For each ImportEntry Record in in module.[[ImportEntries]], do
a. Let importedModule be ? HostResolveImportedModule(module,
in.[[ModuleRequest]]).
b. If in.[[ImportName]] is "*", then
[...]
c. Else,
i. Let resolution be ?
importedModule.ResolveExport(in.[[ImportName]], « », « »).
ii. If resolution is null or resolution is "ambiguous", throw a
SyntaxError exception.
iii. Call envRec.CreateImportBinding(in.[[LocalName]],
resolution.[[Module]], resolution.[[BindingName]]).
[...]
14. Let declaredVarNames be a new empty List.
15. For each element d in varDeclarations do
a. For each element dn of the BoundNames of d do
i. If dn is not an element of declaredVarNames, then
1. Perform ! envRec.CreateMutableBinding(dn, false).
2. Call envRec.InitializeBinding(dn, undefined).
3. Append dn to declaredVarNames.
[...]
8.1.1.5.5 CreateImportBinding
[...]
5. Create an immutable indirect binding in envRec for N that references M
and N2 as its target binding and record that the binding is initialized.
6. Return NormalCompletion(empty).
flags: [module]
---*/
assert.sameValue(
y,
undefined,
'binding is initialized to `undefined` prior to module evaulation'
);
assert.throws(TypeError, function() {
y = null;
}, 'binding rejects assignment');
assert.sameValue(y, undefined, 'binding value is immutable');
import { x as y , } from './instn-named-bndng-trlng-comma.js';
export var x = 23;
reportCompare(0, 0);