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A recent change to the specification [1] introduces parse-time errors
for certain usages of `super` within eval code. Modify all tests that
are affected by this change:
- Update the test bodies to accurately enforce the new semantics
- Rename files to better reflect the section of the specification that
they enforce
- Update test meta-data
- Change the `esid` meta-data to reflect the location of the relevant
specification text
- Remove the `es6id` meta-data as the behavior is no longer relatable
to that specification
- Introduce the `features` meta-data in cases where the test file's
new location no longer reflects all required language features
[1] "Normative: Clarify rules around super inside eval"
https://github.com/tc39/ecma262/pull/685
48 lines
1.6 KiB
JavaScript
48 lines
1.6 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-performeval
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description: >
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SuperProperty may may only occur in eval code for direct eval within a method
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info: |
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[...]
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4. Let inMethod be false.
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5. Let inConstructor be false.
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6. If thisEnvRec has a [[HomeObject]] field, then
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a. Let inMethod be true.
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b. If thisEnvRec.[[FunctionObject]] has a [[Construct]] field, let
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inConstructor be true.
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7. Let script be the ECMAScript code that is the result of parsing x,
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interpreted as UTF-16 encoded Unicode text as described in 6.1.4, for the
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goal symbol Script. If inMethod is false, additional early error rules
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from 18.2.1.1.1 are applied. If inConstructor is false, additional early
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error rules from 18.2.1.1.2 are applied. If the parse fails, throw a
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SyntaxError exception. If any early errors are detected, throw a
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SyntaxError or a ReferenceError exception, depending on the type of the
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error (but see also clause 16). Parsing and early error detection may be
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interweaved in an implementation dependent manner.
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18.2.1.1.1 Additional Early Error Rules for Eval Outside Methods
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ScriptBody : StatementList
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- It is a Syntax Error if StatementList contains super.
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features: [super]
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---*/
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var caught;
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function f() {
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// Early errors restricting the usage of SuperProperty necessitate the use of
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// `eval`.
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try {
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eval('super["x"];');
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} catch (err) {
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caught = err;
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}
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}
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f();
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assert.sameValue(typeof caught, 'object');
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assert.sameValue(caught.constructor, SyntaxError);
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