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* [Bug c++/21971] New: class friend declaration doesn't allow use in class scope
@ 2005-06-09 0:16 jconner at apple dot com
2005-06-09 0:19 ` [Bug c++/21971] " pinskia at gcc dot gnu dot org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: jconner at apple dot com @ 2005-06-09 0:16 UTC (permalink / raw)
To: gcc-bugs
The following code:
class a {
friend class b;
b *pb;
};
Produces an error message in the current mainline (4.1.0 development):
bar.c:3: error: ISO C++ forbids declaration of 'b' with no type
bar.c:3: error: expected ';' before '*' token
14882:2003, 11.4.7, indicates that this should be allowed:
"A name nominated by a friend declaration shall be accessible in the scope of the class containing the
friend declaration."
This is a regression from 4.0.
--
Summary: class friend declaration doesn't allow use in class
scope
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: minor
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jconner at apple dot com
CC: gcc-bugs at gcc dot gnu dot org
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21971
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/21971] class friend declaration doesn't allow use in class scope
2005-06-09 0:16 [Bug c++/21971] New: class friend declaration doesn't allow use in class scope jconner at apple dot com
@ 2005-06-09 0:19 ` pinskia at gcc dot gnu dot org
2005-06-09 0:26 ` pinskia at gcc dot gnu dot org
2005-06-09 16:12 ` gcc-bugzilla at gcc dot gnu dot org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-06-09 0:19 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |lerdsuwa at users dot
| |sourceforge dot net
Keywords| |rejects-valid
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21971
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/21971] class friend declaration doesn't allow use in class scope
2005-06-09 0:16 [Bug c++/21971] New: class friend declaration doesn't allow use in class scope jconner at apple dot com
2005-06-09 0:19 ` [Bug c++/21971] " pinskia at gcc dot gnu dot org
@ 2005-06-09 0:26 ` pinskia at gcc dot gnu dot org
2005-06-09 16:12 ` gcc-bugzilla at gcc dot gnu dot org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-06-09 0:26 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-06-09 00:26 -------
Comeau also rejects the code.
I think this is invalid but I will let Kriang comment on this.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21971
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/21971] class friend declaration doesn't allow use in class scope
2005-06-09 0:16 [Bug c++/21971] New: class friend declaration doesn't allow use in class scope jconner at apple dot com
2005-06-09 0:19 ` [Bug c++/21971] " pinskia at gcc dot gnu dot org
2005-06-09 0:26 ` pinskia at gcc dot gnu dot org
@ 2005-06-09 16:12 ` gcc-bugzilla at gcc dot gnu dot org
2 siblings, 0 replies; 4+ messages in thread
From: gcc-bugzilla at gcc dot gnu dot org @ 2005-06-09 16:12 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From gcc-bugzilla at gcc dot gnu dot org 2005-06-09 16:11 -------
Subject: class friend declaration doesn't allow use in class scope
------- Additional Comments From lerdsuwa at gcc dot gnu dot org 2005-06-09 13:58 -------
Not a bug. The clause you referred to:
"A name nominated by a friend declaration shall be accessible in the scope of
the class containing the friend declaration."
actually means that the following code is not allowed:
class A { class B {}; };
class C {
friend class A::B; // Error - A::B is not accessible inside C
};
For your case, look at 11.4 paragraph 9:
"For a friend class declaration, if there is no prior declaration, the class
that is specified
belongs to the innermost enclosing non-class scope, but if it is subsequently
referenced,
its name is not found by name lookup until a matching declaration is provided
in the innermost
enclosing nonclass scope."
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21971
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2005-06-09 16:12 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2005-06-09 0:16 [Bug c++/21971] New: class friend declaration doesn't allow use in class scope jconner at apple dot com
2005-06-09 0:19 ` [Bug c++/21971] " pinskia at gcc dot gnu dot org
2005-06-09 0:26 ` pinskia at gcc dot gnu dot org
2005-06-09 16:12 ` gcc-bugzilla at gcc dot gnu dot org
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