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AtomEscape's U parameter is reversed? #1094

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mysticatea opened this Issue Feb 8, 2018 · 1 comment

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@mysticatea
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mysticatea commented Feb 8, 2018

https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-AtomEscape

AtomEscape[U, N]::
    [+U] DecimalEscape
    [~U] DecimalEscape but only if the CapturingGroupNumber of DecimalEscape is <= NcapturingParens
    CharacterClassEscape
    CharacterEscape[~U, ?N]
    [+N]kGroupName

This production looks to allow arbitrary DecimalEscape if u flag is given but allow "only if the CapturingGroupNumber of DecimalEscape is <= NcapturingParens" if u flag is not given.

However, browser's behavior looks reverse. Was it intended the following?

AtomEscape[U, N]::
    [+U] DecimalEscape but only if the CapturingGroupNumber of DecimalEscape is <= NcapturingParens
    [~U] DecimalEscape
    CharacterClassEscape
    CharacterEscape[~U, ?N]
    [+N]kGroupName
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mysticatea Feb 8, 2018

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Never mind. I had misunderstood.
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mysticatea commented Feb 8, 2018

Never mind. I had misunderstood.

@mysticatea mysticatea closed this Feb 8, 2018

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