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From: "lcid-fire at gmx dot net" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/50140] New: sorry, unimplemented: cannot expand ‘T ...’ into a fixed-length argument list Date: Sat, 20 Aug 2011 20:52:00 -0000 [thread overview] Message-ID: <bug-50140-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50140 Bug #: 50140 Summary: sorry, unimplemented: cannot expand ‘T ...’ into a fixed-length argument list Classification: Unclassified Product: gcc Version: 4.5.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned@gcc.gnu.org ReportedBy: lcid-fire@gmx.net Trying to use metaprogramming with variadic templates g++ chokes on the following code: template<GLenum One, GLenum... Others> class Eval { public: bool eval(GLenum value) { if( value == One ) return true; Eval<Others...> recurse(); // Try out the rest return recurse.eval(value); }; }; template<> class Eval { public: bool eval(GLenum value) { return false; }; }; template<GLenum... ValidEnums> class GLPart { protected: GLPart() { }; public: bool Evaluate(GLenum value) { Eval<ValidEnums...> ev(); bool isValid = ev.eval(value); if( !isValid ) glSetError(GL_INVALID_ENUM); return isValid; }; }; which gives the error: sorry, unimplemented: cannot expand ‘Others ...’ into a fixed-length argument list
next reply other threads:[~2011-08-20 20:37 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-08-20 20:52 lcid-fire at gmx dot net [this message] 2011-08-20 23:16 ` [Bug c++/50140] [C++0x] " paolo.carlini at oracle dot com 2011-10-14 19:16 ` jason at gcc dot gnu.org
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