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eemeli
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Co-authored-by: Addison Phillips <[email protected]>
aphillips
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catamorphism
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Seems reasonable enough
macchiati
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Aug 7, 2024
| or contain a _variable_ that directly or indirectly references a _declaration_ with an _annotation_. | ||
| - Each _variant_ MUST use a list of _keys_ that is unique from that | ||
| of all other _variants_ in the _message_. | ||
| _Literal_ _keys_ are compared by their contents, not their syntactical appearance. |
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| _Literal_ _keys_ are compared by their contents, not their syntactical appearance. | |
| _Literal_ _keys_ are compared by their contents, not their syntactical appearance. | |
| Keys are considered the same if they are canonically equivalent. | |
| See [Canonical and Compatibility Equivalence](https://unicode.org/reports/tr15/#Canon_Compat_Equivalence) |
Unicode conformance allows (and encourages) implementations to normalize canonically equivalent characters. This is a very common operation when text is input and/or processed. Without this step, there are cases where one implementation would return this error and another would not.
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Canonical equivalence looks like a pretty good idea, but we should apply it to all the places where we do such comparisons. But I think that's a separate change from this PR that I explicitly left out:
This does not address the questions about identifier normalization also raised in the parent issue; that should be done in a separate PR.
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Makes sense
…On Wed, Aug 7, 2024, 12:15 Eemeli Aro ***@***.***> wrote:
***@***.**** commented on this pull request.
------------------------------
In spec/syntax.md
<#853 (comment)>
:
> @@ -369,6 +369,9 @@ satisfied:
- At least one _variant_ MUST exist whose _keys_ are all equal to the "catch-all" key `*`.
- Each _selector_ MUST have an _annotation_,
or contain a _variable_ that directly or indirectly references a _declaration_ with an _annotation_.
+- Each _variant_ MUST use a list of _keys_ that is unique from that
+ of all other _variants_ in the _message_.
+ _Literal_ _keys_ are compared by their contents, not their syntactical appearance.
Canonical equivalence looks like a pretty good idea, but we should apply
it to all the places where we do such comparisons. But I think that's a
separate change from this PR that I explicitly left out:
This does not address the questions about identifier normalization also
raised in the parent issue; that should be done in a separate PR.
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See #847 for context and discussion.
This does not address the questions about identifier normalization also raised in the parent issue; that should be done in a separate PR.