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* Re: c++/9634: [3.4 regression] Problems with templates (SFINAE)
@ 2003-05-01 14:06 Giovanni Bajo
0 siblings, 0 replies; 2+ messages in thread
From: Giovanni Bajo @ 2003-05-01 14:06 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c++/9634; it has been noted by GNATS.
From: "Giovanni Bajo" <giovannibajo@libero.it>
To: <gcc-gnats@gcc.gnu.org>,
<gcc-bugs@gcc.gnu.org>,
<nobody@gcc.gnu.org>,
<gcc-prs@gcc.gnu.org>,
<poschmid@lbl.gov>
Cc:
Subject: Re: c++/9634: [3.4 regression] Problems with templates (SFINAE)
Date: Thu, 1 May 2003 15:59:01 +0200
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9634
Yes, this is DR224
(http://anubis.dkuug.dk/jtc1/sc22/wg21/docs/cwg_defects.html#224), which is
in WP status (so the resolution will be adopted in the next version of the
standard). Basically, this PR can be sumed up in the following code:
--------------------------------------
template <typename T>
struct A
{
typedef int Bar;
template <typename>
struct N {};
typedef Bar type1;
typedef A::Bar type2;
typedef A<T>::Bar type3;
typedef N<int> type4;
typedef A::N<int> type5;
typedef A<T>::N<int> type6;
};
--------------------------------------
pr9634.cpp:10: error: ISO C++ forbids declaration of `Bar' with no type
pr9634.cpp:10: error: expected `;'
pr9634.cpp:11: error: ISO C++ forbids declaration of `Bar' with no type
pr9634.cpp:11: error: expected `;'
pr9634.cpp:14: error: `N<int>' specified as declarator-id
pr9634.cpp:14: error: expected `;'
pr9634.cpp:15: error: `N<int>' specified as declarator-id
pr9634.cpp:15: error: expected `;'
The code is legal and should be accepted by GCC. It's rejected from 3.4
(which first disables the implicit typename/template extensions).
NOTE for the fixer: I suggest to prepare a testcase using the official
examples present in the above link, which tests all the conditions for both
success and failure.
Giovanni Bajo
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: c++/9634: [3.4 regression] Problems with templates (SFINAE)
@ 2003-02-09 23:45 paolo
0 siblings, 0 replies; 2+ messages in thread
From: paolo @ 2003-02-09 23:45 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, nobody, poschmid
Old Synopsis: Problems with templates (SFINAE)
New Synopsis: [3.4 regression] Problems with templates (SFINAE)
State-Changed-From-To: open->analyzed
State-Changed-By: paolo
State-Changed-When: Sun Feb 9 23:45:36 2003
State-Changed-Why:
In the meanwhile I have asked Daveed Vandevoorde, who
replied, about the 'template' keyword:
"I believe it has been clarified that it is not actually
compulsory in this case because the qualifier is the
injected class name. However, this was the object of
a post-1998 defect report against the standard."
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9634
^ permalink raw reply [flat|nested] 2+ messages in thread
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2003-05-01 14:06 c++/9634: [3.4 regression] Problems with templates (SFINAE) Giovanni Bajo
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2003-02-09 23:45 paolo
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