Re: Is this safe?

From	Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups	comp.lang.c
Subject	Re: Is this safe?
Date	2023-02-26 08:38 -0800
Organization	A noiseless patient Spider
Message-ID	<86lekk9yc0.fsf@linuxsc.com> (permalink)
References	(11 earlier) <tt7i6i$1rpb5$1@dont-email.me> <tt82j1$1tivo$1@dont-email.me> <tt83vh$1tk8v$1@dont-email.me> <tt85k9$1tj6h$1@dont-email.me> <UcNJL.102163$eRZ7.2491@fx06.iad>

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Richard Damon <Richard@Damon-Family.org> writes:
> On 2/23/23 11:52 AM, James Kuyper wrote:
>> On 2/23/23 11:24, Paavo Helde wrote:
>>
>>> [example]
>>
>> That's non-conforming.
>> "The isdigit function tests for any decimal-digit character (as
>> defined in 5.2.1)."  (7.4.1.5).
>>
>> "...
>> the 10 decimal digits
>> 0 1 2 3 4 5 6 7 8 9" (5.2.1p3)
>>
>> "digits" is italicized, an ISO convention indicating that this
>> constitutes the official definition of that term.  [only those
>> 10 characters are allowed, not any others.]
>
> And before that it says (in p1)
>
> Each set is further divided into a basic character set, whose
> contents are given by this subclause, and a set of zero or more
> locale-specific members (which are not members of the basic
> character set) called extended characters.
>
> So ALL the categories may have locale specific additions added.
>
> So, unless a function specifically restricts its classification to
> just the "basic character set", there might be extended characters
> in the set.

You are misreading the meaning here.  The phrase "Each set" in
section 5.2.1 paragraph 1 refers only to the two sets mentioned in
that paragraph, namely, the source character set and the execution
character set;  it does not refer to the several named collections
of characters given in paragraph 3, which collections are not even
identified in the C standard as "sets", including in the passages
mentioning them in section 7.4.

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Re: Is this safe? James Kuyper <jameskuyper@alumni.caltech.edu> - 2023-02-23 11:52 -0500
  Re: Is this safe? Richard Damon <Richard@Damon-Family.org> - 2023-02-23 12:17 -0500
    Re: Is this safe? James Kuyper <jameskuyper@alumni.caltech.edu> - 2023-02-24 02:05 -0500
    Re: Is this safe? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-02-26 08:38 -0800

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