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* [Bug c++/46061] New: Variadic Template Templates: not expandable into fixed-size argument list, Implementation Gap.
@ 2010-10-18 1:14 andreas.milton.m at gmail dot com
2010-10-18 12:07 ` [Bug c++/46061] [C++0x] " redi at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: andreas.milton.m at gmail dot com @ 2010-10-18 1:14 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46061
Summary: Variadic Template Templates: not expandable into
fixed-size argument list, Implementation Gap.
Product: gcc
Version: 4.5.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: andreas.milton.m@gmail.com
Created attachment 22073
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22073
full demo for bug ( .ii-file <14 lines)
The following struct "type_list" marks a list of types, which is constructed as
a template template class with a variadic type list of template arguments:
template <typename H, template <typename> class T, template <typename> class...
R>
struct type_list
{
typedef type_list< T<H>, R... > tail;
};
template<typename H, template<typename> class T>
struct type_list<H,T> {};
The code (attached as variadic_templ_templ.ii) produces the following
error-message (identical for gcc 4.4 and 4.5.1):
"sorry, unimplemented: cannot expand ‘template<class> class ... R ...’ into a
fixed-length argument list"
No other flags than -v -save-temps -Wall -std=c++0x were used.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c++/46061] [C++0x] Variadic Template Templates: not expandable into fixed-size argument list, Implementation Gap.
2010-10-18 1:14 [Bug c++/46061] New: Variadic Template Templates: not expandable into fixed-size argument list, Implementation Gap andreas.milton.m at gmail dot com
@ 2010-10-18 12:07 ` redi at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: redi at gcc dot gnu.org @ 2010-10-18 12:07 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46061
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |DUPLICATE
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2010-10-18 12:06:55 UTC ---
dup
*** This bug has been marked as a duplicate of bug 39653 ***
^ permalink raw reply [flat|nested] 2+ messages in thread
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2010-10-18 1:14 [Bug c++/46061] New: Variadic Template Templates: not expandable into fixed-size argument list, Implementation Gap andreas.milton.m at gmail dot com
2010-10-18 12:07 ` [Bug c++/46061] [C++0x] " redi at gcc dot gnu.org
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