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Message-ID: <CACxTtGub0ZdH8uKu=YsT+2fjRBX0+V0c7FwxqiN5RQOvsLOEnw@mail.gmail.com>
Date: Thu, 29 Mar 2018 00:30:52 +0000
From: Jon Scobie <jon.scobie@...lsign.com>
To: musl@...ts.openwall.com
Subject: Re: Maybe not a bug but a possible omission?
Intended types? It's a macro. Where is the type definition? It is inferred.
Why not just make it implicit when the language allows for it?
On Wed, 28 Mar 2018, 18:54 Rich Felker, <dalias@...c.org> wrote:
> On Wed, Mar 28, 2018 at 07:19:49PM +0200, Szabolcs Nagy wrote:
> > * Jon Scobie <jon.scobie@...lsign.com> [2018-03-28 14:33:23 +0100]:
> > > Well, I definitely agree that instead of definitions like
> > >
> > > #define INT64_MIN (-1-0x7fffffffffffffff)
> > >
> > > we should have
> > >
> > > #define INT64_MIN (-1 - INT64_C(0x7fffffffffffffff))
> > >
> >
> > why?
> >
> > "The macro INTN_C(value) shall expand to an integer constant expression
> corresponding to the type int_leastN_t"
> >
> > i dont think it is necessary or appropriate: the c rules
> > already handles this portably: the const has the lowest
> > rank 64bit signed int type, any additional complication
> > can just get the type wrong.
>
> Yes. If a tool is misinterpreting the expressions here, the tool
> should be fixed. They all have the intended types already when
> evaluated as C expressions. Making random edits to headers to make
> buggy tools happy is not a direction I want to take.
>
> Rich
>
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