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* [Bug libstdc++/44663] New: missed GXX_EXPERIMENTAL guards in <tr1/tuple>?
@ 2010-06-25 10:49 pluto at agmk dot net
2010-06-25 11:09 ` [Bug libstdc++/44663] " redi at gcc dot gnu dot org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: pluto at agmk dot net @ 2010-06-25 10:49 UTC (permalink / raw)
To: gcc-bugs
hi,
the latest llvm/clang++ reports an error during parsing <tr1/tuple>
included from <tr1/functional>:
In file included from t00.cpp:1:
In file included from /usr/include/c++/4.5.0/tr1/functional:39:
/usr/include/c++/4.5.0/tr1/tuple:68:30: error: variadic templates are only
allowed in C++0x
template<int _Idx, typename... _Elements>
afaics there's no #ifdef __GXX_EXPERIMENTAL... guards but...
http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt01ch01.html#manual.intro.status.standard.200x
(...)
In this implementation -std=gnu++0x or -std=c++0x flags must be used
to enable language and library features. The pre-defined symbol
__GXX_EXPERIMENTAL_CXX0X__ is used to check for the presence of
the required flag.
(...)
--
Summary: missed GXX_EXPERIMENTAL guards in <tr1/tuple>?
Product: gcc
Version: 4.5.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pluto at agmk dot net
GCC host triplet: x86_64-gnu-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44663
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/44663] missed GXX_EXPERIMENTAL guards in <tr1/tuple>?
2010-06-25 10:49 [Bug libstdc++/44663] New: missed GXX_EXPERIMENTAL guards in <tr1/tuple>? pluto at agmk dot net
@ 2010-06-25 11:09 ` redi at gcc dot gnu dot org
2010-06-25 11:55 ` redi at gcc dot gnu dot org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: redi at gcc dot gnu dot org @ 2010-06-25 11:09 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from redi at gcc dot gnu dot org 2010-06-25 11:08 -------
(In reply to comment #0)
> the latest llvm/clang++ reports an error during parsing <tr1/tuple>
> included from <tr1/functional>:
>
> In file included from t00.cpp:1:
> In file included from /usr/include/c++/4.5.0/tr1/functional:39:
> /usr/include/c++/4.5.0/tr1/tuple:68:30: error: variadic templates are only
> allowed in C++0x
That's Clang's problem, not GCC's :-)
They are supported as an extension in g++, so we can use them to implement
components like tr1::tuple. (I think the original implementation of variadic
templates was done by Douglas Gregor, who's now working on Clang.)
See also Bug 43824
--
redi at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44663
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/44663] missed GXX_EXPERIMENTAL guards in <tr1/tuple>?
2010-06-25 10:49 [Bug libstdc++/44663] New: missed GXX_EXPERIMENTAL guards in <tr1/tuple>? pluto at agmk dot net
2010-06-25 11:09 ` [Bug libstdc++/44663] " redi at gcc dot gnu dot org
@ 2010-06-25 11:55 ` redi at gcc dot gnu dot org
2010-06-25 11:59 ` paolo dot carlini at oracle dot com
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: redi at gcc dot gnu dot org @ 2010-06-25 11:55 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from redi at gcc dot gnu dot org 2010-06-25 11:55 -------
http://gcc.gnu.org/onlinedocs/libstdc++/faq.html#faq.other_compilers
If the guards were there as you suggest, tr1::tuple would only be usable in
C++0x mode, where it's redundant because you have std::tuple anyway.
g++ is the only compiler officially supported by libstdc++, so personally I'm
opposed to disabling functionality to support other compilers. I'm not opposed
to changes that don't affect functionality for g++ users e.g. if non-standard
features are used unnecessarily and could be replaced with equivalent standard
features. That doesn't apply here, as the advantages of variadic templates are
huge.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44663
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/44663] missed GXX_EXPERIMENTAL guards in <tr1/tuple>?
2010-06-25 10:49 [Bug libstdc++/44663] New: missed GXX_EXPERIMENTAL guards in <tr1/tuple>? pluto at agmk dot net
2010-06-25 11:09 ` [Bug libstdc++/44663] " redi at gcc dot gnu dot org
2010-06-25 11:55 ` redi at gcc dot gnu dot org
@ 2010-06-25 11:59 ` paolo dot carlini at oracle dot com
2010-06-25 14:18 ` [Bug libstdc++/44663] New: " Andrew Pinski
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: paolo dot carlini at oracle dot com @ 2010-06-25 11:59 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from paolo dot carlini at oracle dot com 2010-06-25 11:59 -------
Totally agree.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44663
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/44663] missed GXX_EXPERIMENTAL guards in <tr1/tuple>?
2010-06-25 10:49 [Bug libstdc++/44663] New: missed GXX_EXPERIMENTAL guards in <tr1/tuple>? pluto at agmk dot net
` (3 preceding siblings ...)
2010-06-25 14:18 ` [Bug libstdc++/44663] New: " Andrew Pinski
@ 2010-06-25 14:18 ` pinskia at gmail dot com
2010-06-25 14:23 ` paolo dot carlini at oracle dot com
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gmail dot com @ 2010-06-25 14:18 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from pinskia at gmail dot com 2010-06-25 14:18 -------
Subject: Re: New: missed GXX_EXPERIMENTAL guards in <tr1/tuple>?
On Jun 25, 2010, at 3:49 AM, "pluto at agmk dot net" <gcc-bugzilla@gcc.gnu.org
> wrote:
> hi,
>
> the latest llvm/clang++ reports an error during parsing <tr1/tuple>
> included from <tr1/functional>:
Both of these are c++0x only headers and really are only supported
when compiling in c++0x mode.
>
> In file included from t00.cpp:1:
> In file included from /usr/include/c++/4.5.0/tr1/functional:39:
> /usr/include/c++/4.5.0/tr1/tuple:68:30: error: variadic templates
> are only
> allowed in C++0x
> template<int _Idx, typename... _Elements>
>
> afaics there's no #ifdef __GXX_EXPERIMENTAL... guards but...
>
> http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt01ch01.html#manual.intro.status.standard.200x
>
> (...)
> In this implementation -std=gnu++0x or -std=c++0x flags must be used
> to enable language and library features. The pre-defined symbol
> __GXX_EXPERIMENTAL_CXX0X__ is used to check for the presence of
> the required flag.
> (...)
>
>
> --
> Summary: missed GXX_EXPERIMENTAL guards in <tr1/tuple>?
> Product: gcc
> Version: 4.5.1
> Status: UNCONFIRMED
> Severity: normal
> Priority: P3
> Component: libstdc++
> AssignedTo: unassigned at gcc dot gnu dot org
> ReportedBy: pluto at agmk dot net
> GCC host triplet: x86_64-gnu-linux
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44663
>
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44663
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [Bug libstdc++/44663] New: missed GXX_EXPERIMENTAL guards in <tr1/tuple>?
2010-06-25 10:49 [Bug libstdc++/44663] New: missed GXX_EXPERIMENTAL guards in <tr1/tuple>? pluto at agmk dot net
` (2 preceding siblings ...)
2010-06-25 11:59 ` paolo dot carlini at oracle dot com
@ 2010-06-25 14:18 ` Andrew Pinski
2010-06-25 14:18 ` [Bug libstdc++/44663] " pinskia at gmail dot com
2010-06-25 14:23 ` paolo dot carlini at oracle dot com
5 siblings, 0 replies; 7+ messages in thread
From: Andrew Pinski @ 2010-06-25 14:18 UTC (permalink / raw)
To: gcc-bugzilla; +Cc: gcc-bugs
On Jun 25, 2010, at 3:49 AM, "pluto at agmk dot net" <gcc-bugzilla@gcc.gnu.org
> wrote:
> hi,
>
> the latest llvm/clang++ reports an error during parsing <tr1/tuple>
> included from <tr1/functional>:
Both of these are c++0x only headers and really are only supported
when compiling in c++0x mode.
>
> In file included from t00.cpp:1:
> In file included from /usr/include/c++/4.5.0/tr1/functional:39:
> /usr/include/c++/4.5.0/tr1/tuple:68:30: error: variadic templates
> are only
> allowed in C++0x
> template<int _Idx, typename... _Elements>
>
> afaics there's no #ifdef __GXX_EXPERIMENTAL... guards but...
>
> http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt01ch01.html#manual.intro.status.standard.200x
>
> (...)
> In this implementation -std=gnu++0x or -std=c++0x flags must be used
> to enable language and library features. The pre-defined symbol
> __GXX_EXPERIMENTAL_CXX0X__ is used to check for the presence of
> the required flag.
> (...)
>
>
> --
> Summary: missed GXX_EXPERIMENTAL guards in <tr1/tuple>?
> Product: gcc
> Version: 4.5.1
> Status: UNCONFIRMED
> Severity: normal
> Priority: P3
> Component: libstdc++
> AssignedTo: unassigned at gcc dot gnu dot org
> ReportedBy: pluto at agmk dot net
> GCC host triplet: x86_64-gnu-linux
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44663
>
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libstdc++/44663] missed GXX_EXPERIMENTAL guards in <tr1/tuple>?
2010-06-25 10:49 [Bug libstdc++/44663] New: missed GXX_EXPERIMENTAL guards in <tr1/tuple>? pluto at agmk dot net
` (4 preceding siblings ...)
2010-06-25 14:18 ` [Bug libstdc++/44663] " pinskia at gmail dot com
@ 2010-06-25 14:23 ` paolo dot carlini at oracle dot com
5 siblings, 0 replies; 7+ messages in thread
From: paolo dot carlini at oracle dot com @ 2010-06-25 14:23 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from paolo dot carlini at oracle dot com 2010-06-25 14:23 -------
Wrong Andrew.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44663
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2010-06-25 14:23 UTC | newest]
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2010-06-25 10:49 [Bug libstdc++/44663] New: missed GXX_EXPERIMENTAL guards in <tr1/tuple>? pluto at agmk dot net
2010-06-25 11:09 ` [Bug libstdc++/44663] " redi at gcc dot gnu dot org
2010-06-25 11:55 ` redi at gcc dot gnu dot org
2010-06-25 11:59 ` paolo dot carlini at oracle dot com
2010-06-25 14:18 ` [Bug libstdc++/44663] New: " Andrew Pinski
2010-06-25 14:18 ` [Bug libstdc++/44663] " pinskia at gmail dot com
2010-06-25 14:23 ` paolo dot carlini at oracle dot com
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