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Normative: Add Optional Chaining #1646

Merged
merged 1 commit into from
Dec 12, 2019
Merged

Normative: Add Optional Chaining #1646

merged 1 commit into from
Dec 12, 2019

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DanielRosenwasser
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@DanielRosenwasser DanielRosenwasser commented Jul 25, 2019 •
edited

This change adds the relevant updates for the stage 3 Optional Chaining proposal. The intended changes can be viewed at https://tc39.es/proposal-optional-chaining/.

The Test262 PR is available at tc39/test262#2212

@ljharb ljharb added normative change Affects behavior required to correctly evaluate some ECMAScript source text pending stage 4 This proposal has not yet achieved stage 4, but may otherwise be ready to merge. proposal This is related to a specific proposal, and will be closed/merged when the proposal reaches stage 4. labels Jul 25, 2019
@ljharb ljharb requested review from zenparsing, a team and waldemarhorwat July 25, 2019 18:32
@ljharb ljharb added the needs test262 tests The proposal should specify how to test an implementation. Ideally via github.com/tc39/test262 label Jul 25, 2019
@ljharb ljharb requested a review from jridgewell July 25, 2019 18:32
@michaelblyons michaelblyons mentioned this pull request Jul 26, 2019
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@claudepache claudepache mentioned this pull request Aug 8, 2019
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@ljharb ljharb removed the request for review from zenparsing October 12, 2019 05:06
@pendenaor pendenaor mentioned this pull request Oct 29, 2019
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@ljharb ljharb added has test262 tests and removed needs test262 tests The proposal should specify how to test an implementation. Ideally via github.com/tc39/test262 labels Oct 31, 2019
bakkot
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syg commented Nov 12, 2019

Could someone update this PR to reflect the upstream fixes and editorial changes?

syg
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DanielRosenwasser commented Nov 13, 2019 •
edited

I've integrated the upstream changes and addressed feedback provided apart from the Evaluate_______PropertyAccess naming discussion which I'll try to address shortly.

bakkot
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jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 4, 2020
@jmdyck
Editorial: Add 4 <emu-prodref> elements to Annex A
6594c43 
(PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 4, 2020
@jmdyck
Editorial: tweak syntax in algorithms
4ed9628 
(PR tc39#1644 and PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 4, 2020
@jmdyck
Editorial: eliminate accidental ambiguity in Punctuator
6762395 
PR tc39#1646 introduced an ambiguity to the lexical grammar:
Punctuator derives OtherPunctuator in two different ways --
directly, and indirectly via OptionalChainingPunctuator.

It doesn't make sense for OptionalChainingPunctuator to derive OtherPunctuator,
so I've eliminated that alternative.
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 5, 2020
@jmdyck
Editorial: insert space before paren in clause heading
2466266 
(PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 5, 2020
@jmdyck
Editorial: eliminate grammatical parameters
7187282 
... from non-defining production.
(PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 5, 2020
@jmdyck
Editorial: Add 4 <emu-prodref> elements to Annex A
4a676f2 
(PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 5, 2020
@jmdyck
Editorial: tweak syntax in algorithms
0410ab2 
(PR tc39#1644 and PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 5, 2020
@jmdyck
Editorial: eliminate accidental ambiguity in Punctuator
f5e7449 
PR tc39#1646 introduced an ambiguity to the lexical grammar:
Punctuator derives OtherPunctuator in two different ways --
directly, and indirectly via OptionalChainingPunctuator.

It doesn't make sense for OptionalChainingPunctuator to derive OtherPunctuator,
so I've eliminated that alternative.
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 13, 2020
@jmdyck
Editorial: insert space before paren in clause heading
c72eb6b 
(PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 13, 2020
@jmdyck
Editorial: eliminate grammatical parameters
8022bdf 
... from non-defining production.
(PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 13, 2020
@jmdyck
Editorial: Add 4 <emu-prodref> elements to Annex A
5dda567 
(PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 13, 2020
@jmdyck
Editorial: tweak syntax in algorithms
1ceb114 
(PR tc39#1644 and PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 13, 2020
@jmdyck
Editorial: eliminate accidental ambiguity in Punctuator
5fb9b07 
PR tc39#1646 introduced an ambiguity to the lexical grammar:
Punctuator derives OtherPunctuator in two different ways --
directly, and indirectly via OptionalChainingPunctuator.

It doesn't make sense for OptionalChainingPunctuator to derive OtherPunctuator,
so I've eliminated that alternative.
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 13, 2020
@jmdyck
Editorial: insert space before paren in clause heading
b9db34c 
(PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 13, 2020
@jmdyck
Editorial: eliminate grammatical parameters
3e3bfae 
... from non-defining production.
(PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 13, 2020
@jmdyck
Editorial: Add 4 <emu-prodref> elements to Annex A
2cc4287 
(PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 13, 2020
@jmdyck
Editorial: tweak syntax in algorithms
f0e3cbf 
(PR tc39#1644 and PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 13, 2020
@jmdyck
Editorial: eliminate accidental ambiguity in Punctuator
9b44152 
PR tc39#1646 introduced an ambiguity to the lexical grammar:
Punctuator derives OtherPunctuator in two different ways --
directly, and indirectly via OptionalChainingPunctuator.

It doesn't make sense for OptionalChainingPunctuator to derive OtherPunctuator,
so I've eliminated that alternative.
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 15, 2020
@jmdyck
Editorial: insert space before paren in clause heading
d467a30 
(PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 15, 2020
@jmdyck
Editorial: eliminate grammatical parameters
8770b6d 
... from non-defining production.
(PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 15, 2020
@jmdyck
Editorial: Add 4 <emu-prodref> elements to Annex A
b05baba 
(PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 15, 2020
@jmdyck
Editorial: tweak syntax in algorithms
16620d1 
(PR tc39#1644 and PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 15, 2020
@jmdyck
Editorial: eliminate accidental ambiguity in Punctuator
456a22d 
PR tc39#1646 introduced an ambiguity to the lexical grammar:
Punctuator derives OtherPunctuator in two different ways --
directly, and indirectly via OptionalChainingPunctuator.

It doesn't make sense for OptionalChainingPunctuator to derive OtherPunctuator,
so I've eliminated that alternative.
ljharb pushed a commit to jmdyck/ecma262 that referenced this pull request Feb 19, 2020
@jmdyck @ljharb
Editorial: fixes from tc39#1646, tc39#1644, tc39#1406 (tc39#1787)
97d8f19 
 - insert space before paren in clause heading
 - eliminate grammatical parameters from non-defining production
 - Add 4 <emu-prodref> elements to Annex A
 - tweak syntax in algorithms
 - eliminate accidental ambiguity in Punctuator
      PR tc39#1646 introduced an ambiguity to the lexical grammar:
      Punctuator derives OtherPunctuator in two different ways --
      directly, and indirectly via OptionalChainingPunctuator.

      It doesn't make sense for OptionalChainingPunctuator to derive OtherPunctuator,
      so I've eliminated that alternative.
 - minor grammar refactoring re Punctuator
      Move the Punctuator production back to its former position.
      (Grammars are generally written top-down.)
 - Fix a 'use' production for AsyncConciseBody to match the new defining production
 - Add an <emu-prodref> for ExpressionBody to Annex A
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Feb 20, 2020
@jmdyck
Editorial: Add 4 <emu-prodref> elements to Annex A
0c504b6 
(PR tc39#1646)
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request May 29, 2020
@jmdyck
Editorial: Delete more steps in the same vein as PR tc39#1519
e18d5bc 
(These steps come from PR tc39#1646, which went through its whole
life-cycle while tc39#1519 was dormant. Properly, after tc39#1646 was merged,
I should have rebased tc39#1519 and included these changes there.)
@bakkot bakkot mentioned this pull request May 29, 2020
Merged
jmdyck added a commit to jmdyck/ecma262 that referenced this pull request Jun 4, 2020
@jmdyck
Editorial: Delete more steps in the same vein as PR tc39#1519
6b54a09 
(These steps come from PR tc39#1646, which went through its whole
life-cycle while tc39#1519 was dormant. Properly, after tc39#1646 was merged,
I should have rebased tc39#1519 and included these changes there.)
ljharb pushed a commit to jmdyck/ecma262 that referenced this pull request Jun 15, 2020
@jmdyck @ljharb
Editorial: Delete more steps in the same vein as PR tc39#1519 (tc39#2022
2eb104a 
)

These steps come from PR tc39#1646, which went through its whole life-cycle while tc39#1519 was dormant. Properly, after tc39#1646 was merged, I should have rebased tc39#1519 and included these changes there.
@jmdyck jmdyck mentioned this pull request Jun 30, 2020
Closed
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@ljharb ljharb ljharb approved these changes

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