Article View: comp.std.c++
Article #1090Re: Proposed: "closures"
From: Benjamin Schreiber
Date: Sun, 12 May 1991 19:42
Date: Sun, 12 May 1991 19:42
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1670 bytes
In article <1991May10.003304.12390@mathcs.sjsu.edu> horstman@mathcs.sjsu.edu (Cay Horstmann) writes:
>Just out of curiosity: Suppose I have a variable f that holds a pointer
>to a "C" style void->void function and I want to make f local to its source
>file, do I say
>
> static extern "C" void (*f)();
>
>Cay
What you proposed is not syntacticly valid.
From reading the grammar, I get the feeling that the correct way to do this
is:
extern "C" {
static void (*f)();
};
Since any declarations/definitions are gramaticly allowed inside an extern
construct. The following may also be valid:
extern "C" static void (*f)();
I don't know whether current implementations support this (I have nothing
to test this on), but they should. Another use for this flexibility might
be to provide a way to define resources for the Macintosh within the C++
source (i.e. extern "resource ICON,128" {....}). Just a thought.
(Note: I am refering to AT&T 2.1, not ARM)
-- Ben Schreiber
bs@cs.brandeis.edu
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!caen!uwm.edu!bbn.com!nic!news.cs.brandeis.edu!chaos.cs.brandeis.edu!bs From: bs@chaos.cs.brandeis.edu (Benjamin Schreiber) Newsgroups: comp.std.c++ Subject: Re: Proposed: "closures" Keywords: proposal, closures, function pointers Message-ID: <1991May12.194247.21483@news.cs.brandeis.edu> Date: 12 May 91 19:42:47 GMT References: <1991Apr28.231328.2064@world.std.com> <1991Apr30.201532.13706@kestrel.edu> <1991May10.003304.12390@mathcs.sjsu.edu> Sender: usenet@news.cs.brandeis.edu Distribution: comp.std.c++ Organization: Brandeis University Lines: 30