[cfe-dev] constexpr static methods

Miles Bader miles at gnu.org
Thu Jan 12 17:46:38 PST 2012

Hi, with the following prog:

   class X
     X ();
     constexpr static int foo () { return 3; }

compiling with options "-c -std=c++11", I get this error from clang++:

   clang++ -c -std=c++11 /tmp/x.cc
   /tmp/x.cc:4:24: error: non-literal type 'X' cannot have constexpr members
     constexpr static int foo () { return 3; }
   /tmp/x.cc:1:7: note: 'X' is not literal because it is not an aggregate and has
         no constexpr constructors other than copy or move constructors
   class X
   1 error generated.

Is this correct?  Such an error would make sense for a non-static
method, but it seems pretty weird for a static method...

gcc trunk (aka 4.7) accepts the above, but gives a similar error if I
remove "static".

[This originally arose trying to compile with libstdc++ from the gcc
trunk (specifically: "#include <random>").]



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