[Bug c++/62223] New: error: there are no arguments to ‘static_asssert’ that depend on a template parameter, so a declaration of ‘static_asssert’ must be available

[Bug c++/62223] New: error: there are no arguments to ‘static_asssert’ that depend on a template parameter, so a declaration of ‘static_asssert’ must be available

[tower120 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62223

            Bug ID: 62223
           Summary: error: there are no arguments to ‘static_asssert’ that
                    depend on a template parameter, so a declaration of
                    ‘static_asssert’ must be available
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tower120 at gmail dot com

May be not a bug... But, why error occurs in the following code?

#include <tuple>
#include <utility>
using namespace std;

template<class ..._Attrs>
class VertexBuffer
{
    static constexpr const bool ownIndices = sizeof...(_Attrs) == 0;

    void test(){
        static_asssert(ownIndices, "Link to owned indices!!");        
    }
}


int main(){}

error: there are no arguments to 'static_asssert' that depend on a template
parameter, so a declaration of 'static_asssert' must be available
[-fpermissive]
         static_asssert(ownIndices, "Link to owned indices!!");
                                                             ^

Doesn't ownIndices template-dependent value?

Compiled with MinGW 4.9
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Subject: [Bug tree-optimization/62220] missed optimization wrt module for loop variable
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idb220

amker at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |amker at gcc dot gnu.org

--- Comment #1 from amker at gcc dot gnu.org ---
To do such transformation, first problem needs to be resolved would be scalar
evolution?  I suppose it doesn't handle % (or /) right now?

[Bug c++/62223] error: there are no arguments to ‘static_asssert’ that depend on a template parameter, so a declaration of ‘static_asssert’ must be available

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62223

Marc Glisse <glisse at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
I am going to take a guess that you forgot to specify -std=c++11 or equivalent?

[Bug c++/62223] error: there are no arguments to ‘static_asssert’ that depend on a template parameter, so a declaration of ‘static_asssert’ must be available

[tower120 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62223

--- Comment #2 from tower120 <tower120 at gmail dot com> ---
No, I compile it with -std=c++1y

Here, live example http://ideone.com/KsGrnH (though that is gcc-4.8.1)

[Bug c++/62223] error: there are no arguments to ‘static_asssert’ that depend on a template parameter, so a declaration of ‘static_asssert’ must be available

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62223

--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
Typo, check the exact spelling of what g++ is complaining about.

[Bug c++/62223] error: there are no arguments to ‘static_asssert’ that depend on a template parameter, so a declaration of ‘static_asssert’ must be available

[tower120 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62223

--- Comment #4 from tower120 <tower120 at gmail dot com> ---
Typo indeed.
I'm so sorry.

[Bug c++/62223] error: there are no arguments to ‘static_asssert’ that depend on a template parameter, so a declaration of ‘static_asssert’ must be available

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62223

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |manu at gcc dot gnu.org

--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
The spell-checker would have been helpful here. It would have said: did you
mean 'static_assert'?
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Subject: [Bug middle-end/61876] Converting __builtin_round + cast into __builtin_lround is not always equivalent in regards to math errno
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https://gcc.gnu.org/bugzilla/show_bug.cgi?ida876

--- Comment #12 from yroux at gcc dot gnu.org ---
Author: yroux
Date: Fri Aug 22 10:48:22 2014
New Revision: 214312

URL: https://gcc.gnu.org/viewcvs?rev!4312&root=gcc&view=rev
Log:
2014-08-22 Yvan Roux  <yvan.roux@linaro.org>

    Backport from trunk r212989, r213628.
    2014-08-05  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

    * convert.c (convert_to_integer): Guard transformation to lrint by
    -fno-math-errno.

    2014-07-24  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

    PR middle-end/61876
    * convert.c (convert_to_integer): Do not convert BUILT_IN_ROUND and cast
    when flag_errno_math is on.


Modified:
    branches/linaro/gcc-4_9-branch/gcc/ChangeLog.linaro
    branches/linaro/gcc-4_9-branch/gcc/convert.c

[Bug c++/62223] error: there are no arguments to ‘static_asssert’ that depend on a template parameter, so a declaration of ‘static_asssert’ must be available

[tower120 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62223

--- Comment #6 from tower120 <tower120 at gmail dot com> ---
Well, classical "static_asssert is not a function/variable/etc" would be enough
for me.

Because "there are no arguments to 'static_asssert' that depend on a template
parameter" means that there IS such a function, but it does not accept current
parameters set (IMHO).

[Bug c++/62223] error: there are no arguments to ‘static_asssert’ that depend on a template parameter, so a declaration of ‘static_asssert’ must be available

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62223

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to tower120 from comment #6)
> Because "there are no arguments to 'static_asssert' that depend on a
> template parameter" means that there IS such a function, but it does not
> accept current parameters set (IMHO).

No. "A declaration must be available" does not mean "a declaration is available
but it is not usable"