Suggestion:
UAX #31 describes what characters formal languages, such as computer
languages, should choose for use as whitespace and syntactically
significant characters during the process of lexical analysis. C++
does not claim conformance with this requirement.

In particular, the "should describe and implement" wording implies
more comprehensive and broader advice than is given by UAX #31. Also,
lexing produces tokens from characters; past that, we are dealing with
tokens (not characters). Commas also added as an editorial change.

On Wed, May 25, 2022 at 6:05 PM Steve Downey via SG16
<sg16_at_[hidden]> wrote:
>
> E.4 R3 Pattern_White_Space and Pattern_Syntax characters[uaxid.pattern]
>
> 1
> #
> UAX #31 describes how languages that use or interpret patterns of characters, such as regular expressions or number formats, may describe that syntax with Unicode properties.
> 2
> #
> C++ does not do this as part of the language, deferring to library components for such usage of patterns. This requirement does not apply to C++.
>
> 1 UAX#31 describes how formal languages such as computer languages should describe and implement their use of whitespace and syntactically significant characters during the processes of lexing and parsing. C++ does not claim conformance with this requirement.
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