[Bug c++/20261] New: Error with integral-constant expression in template

[redi at gcc dot gnu dot org]

Given this code:
    template<typename T, T N> struct int_ {
        static const T value = N;
        typedef int_< T, static_cast<T>(value+1) > next;
    };

GCC says:
intconst2.cc:3: error: template argument 2 is invalid

It works if you replace "value" with "N".

Possibly related to recent changes to C++ parser disallow floating-point
literals in integral-constant expressions? Appeared around the same time.

This causes compilation failures in Boost.MPL

-- 
           Summary: Error with integral-constant expression in template
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: redi at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20261