Re: ISSUE #?? Proposal: const attribute for input params

Subject: Re: ISSUE #?? Proposal: const attribute for input params
From: Michael Rohleder (michael.rohleder@motorola.com)
Date: Thu Dec 05 2002 - 10:51:34 PST

See the attached main.c and the resulting 'nm' result...

Nuff said.

-Michael

Kevin Cameron x3251 wrote:

> > From michael.rohleder@motorola.com Wed Dec 4 05:43:10 2002
> >
> > Hi Kevin,
> >
> > I am amazed that you say this. Yes, "const" has no impact on linking in C,
> > but I am far away from naming it therefore syntactic sugar.
> > And in case of C++ it is part of the name mangling and therefore has even
> > impact on linking!
> >
> > -Michael
>
> If "const" was actually part of C++ name mangling it would be quite happy since
> it would be another reason for using C++ instead of C. Unfortunately it isn't
> (I tried it out before the last e-mail):
>
> void foo(int bar);
>
> and
>
> void foo(const int bar);
>
> are considered the same wrt linking. The return type is not considered either, so
>
> int foo(int bar);
>
> is also the same.
>
> NB: even if an argument is declared "const", it is only advisory, you can cast
> away the const (that's why it's syntactic sugar).
>
> Kev.
>
> > Kevin Cameron x3251 wrote:
> >
> > > "const" is syntactic sugar in C (and C++), it has no impact on linking. While I agree that it is good
> > > to put it in example mappings in the LRM, there is no way to force users use "const" in their C code.
> > >
> > > Kev. 

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main.c

sparcworks

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