Article View: gnu.g++.bug
Article #1496G++ doesn't handle pointers to functions
From: Michael Tiemann
Date: Wed, 12 Oct 1988 00:25
Date: Wed, 12 Oct 1988 00:25
32 lines
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1772 bytes
Date: 11 Oct 88 21:45:49 GMT
From: armada!becher@decwrl.dec.com (Jonathan D. Becher)
Organization: I have no organization (look at my desk)
Sender: bug-g++-request@prep.ai.mit.edu
The following program compiles with gcc but not with g++.
It seems as if g++ doesn't understand formal parameters that
are pointers to functions.
If anyone can think of a way around this bug (or explain to me
why it isn't one), please let me know.
I can't live without pointers to functions :->
From your previous posting, it is clear that you already know that
using a typedef solves this problem. By using a typedef, you save
compilation time (less declarator structure to grok). If, however,
you are somehow alergic to using typedefs, one thing you can do is this:
doThis(auto int (*f)())
{
f();
}
This will (or should) then compile. This is a bug in the C++
language. I wish that the designers of C++ knew enough about LALR
parsing to have made their language LALR-parsable; unfortunately, they
did not. I consider the AT&T solution (which also doesn't always work
for pointers to functions in parameter positions) of using heuristics
to help try to guide the parser unacceptable, and certainly something
which I would want to distribute, freely or otherwise.
Michael
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Path: arc1-ca.pugleaf.net!utzoo!telly!ddsw1!mcdchg!rutgers!tut.cis.ohio-state.edu!LURCH.STANFORD.EDU!tiemann From: tiemann@LURCH.STANFORD.EDU (Michael Tiemann) Newsgroups: gnu.g++.bug Subject: G++ doesn't handle pointers to functions Message-ID: <8810120025.AA21027@lurch.stanford.edu> Date: 12 Oct 88 00:25:57 GMT References: <68@armada.UUCP> Sender: daemon@tut.cis.ohio-state.edu Distribution: gnu Organization: GNUs Not Usenet Lines: 32