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Re: RFC: target macro->hook migration idea

From: DJ Delorie <dj at redhat dot com>
To: jsm at polyomino dot org dot uk
Cc: zack at codesourcery dot com, gcc at gcc dot gnu dot org
Date: Tue, 22 Jul 2003 15:15:18 -0400
Subject: Re: RFC: target macro->hook migration idea
References: <200307212143.h6LLh1J21190@greed.delorie.com><87ptk3pmpx.fsf@egil.codesourcery.com> <200307212315.h6LNFrw22520@greed.delorie.com><87brvnhy2v.fsf@egil.codesourcery.com> <200307221704.h6MH4x316873@greed.delorie.com> <Pine.LNX.4.56.0307221951210.19496@kern.srcf.societies.cam.ac.uk>

> The macros specified to goto a label outside the macro (a problem
> discussed in projects/beginner.html) need redefining.

What I generally do is create a predicate, and have the macro
call it:

	#define GO_IF(ARG,L) if (legit_p(ARG)) goto L

I think it makes sense (to me at least) to use predicates for all the
goto-if macros.

References:
- RFC: target macro->hook migration idea
  - From: DJ Delorie
- Re: RFC: target macro->hook migration idea
  - From: Zack Weinberg
- Re: RFC: target macro->hook migration idea
  - From: DJ Delorie
- Re: RFC: target macro->hook migration idea
  - From: Zack Weinberg
- Re: RFC: target macro->hook migration idea
  - From: DJ Delorie
- Re: RFC: target macro->hook migration idea
  - From: Joseph S. Myers

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