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RE: question: suffix for fixed-point literal constant
- From: "Fu, Chao-Ying" <fu at mips dot com>
- To: <janis187 at us dot ibm dot com>, <gcc at gcc dot gnu dot org>
- Date: Wed, 11 Feb 2009 10:42:10 -0800
- Subject: RE: question: suffix for fixed-point literal constant
Janis Johnson wrote:
>
> I'm rewriting function interpret_float_suffix in libcpp/expr.c to fix
> suffixes in decimal float literal constants for c/33466. While I'm at
> it I'm fixing suffixes for fixed-point literal constants.
> Currently for
> fixed-point GCC accepts any ordering of the letters in the
> suffix. The
> technical report (N1169) gives specific strings, not
> individual letters
> that can be used in any order. That seems like something
> obvious to fix
> but I thought I'd mention it in case they really should be accepted in
> any order.
>
> My question, though, is about the case of the letters in the suffixes.
> N1169 says "note that the suffix is case insensitive"; should I take
> that literally and allow any mix of cases (as GCC currently does), or
> require that the same case be used within a particular suffix?
From my implementation, I allow mixed-case suffixes.
We can view this as a GCC feature, if it turns out that the spec doesn't allow this.
Thanks!
Regards,
Chao-ying