Strict mode Failing
Expected no error, got SyntaxError: warning: the variable "C" was not declared in function "probeBefore"
non-Strict mode Failing
Expected no error, got SyntaxError: invalid statement encountered.
Features:
- ∅
Expected no error, got SyntaxError: warning: the variable "C" was not declared in function "probeBefore"
Expected no error, got SyntaxError: invalid statement encountered.
// 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-runtime-semantics-classdefinitionevaluation
description: >
Creation of new lexical environment for the class "name" (without a
heritage)
info: |
1. Let lex be the LexicalEnvironment of the running execution context.
2. Let classScope be NewDeclarativeEnvironment(lex).
3. Let classScopeEnvRec be classScope's EnvironmentRecord.
4. If className is not undefined, then
a. Perform classScopeEnvRec.CreateImmutableBinding(className, true).
5. If ClassHeritageopt is not present, then
[...]
6. Else,
a. Set the running execution context's LexicalEnvironment to classScope.
[...]
11. Set the running execution context's LexicalEnvironment to classScope.
---*/
var probeBefore = function() { return C; };
var setBefore = function() { C = null; };
class C {
probe() {
return C;
}
modify() {
C = null;
}
};
var cls = probeBefore();
assert.sameValue(typeof cls, 'function');
setBefore();
assert.sameValue(probeBefore(), null);
assert.sameValue(cls.prototype.probe(), cls, 'inner binding value');
assert.throws(
TypeError, cls.prototype.modify, 'inner binding rejects modification'
);
assert.sameValue(
typeof cls.prototype.probe(), 'function', 'inner binding is immutable'
);