Strict mode Failing
Expected no error, got SyntaxError: invalid statement encountered.
non-Strict mode Failing
Expected no error, got SyntaxError: invalid statement encountered.
Features:
- arrow-function
- class
- Proxy
Expected no error, got SyntaxError: invalid statement encountered.
Expected no error, got SyntaxError: invalid statement encountered.
// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-runtime-semantics-classdefinitionevaluation
description: >
IsConstructor check is performed before "prototype" lookup.
Arrow functions are not constructors (MakeConstructor is not called on them).
info: |
ClassDefinitionEvaluation
[...]
5. Else,
[...]
d. Let superclass be ? GetValue(superclassRef).
e. If superclass is null, then
[...]
f. Else if IsConstructor(superclass) is false, throw a TypeError exception.
features: [arrow-function, class, Proxy]
---*/
var fn = () => {};
Object.defineProperty(fn, "prototype", {
get: function() {
throw new Test262Error("`superclass.prototype` is unreachable");
},
});
assert.throws(TypeError, function() {
class A extends fn {}
});
var bound = (() => {}).bind();
Object.defineProperty(bound, "prototype", {
get: function() {
throw new Test262Error("`superclass.prototype` is unreachable");
},
});
assert.throws(TypeError, function() {
class C extends bound {}
});
var proxy = new Proxy(() => {}, {
get: function() {
throw new Test262Error("`superclass.prototype` is unreachable");
},
});
assert.throws(TypeError, function() {
class C extends proxy {}
});