[Bug c++/49924] New: [C++0X] [constexpr] can't initialize a non-static member array of a literal type as a constexpr

[faisalv at yahoo dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49924

           Summary: [C++0X] [constexpr] can't initialize a non-static
                    member array of a literal type as a constexpr
           Product: gcc
           Version: 4.6.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: fais...@yahoo.com


I believe the following code should compile:

struct A { constexpr A() { } };

struct B {  
    A array[1]; //non-static member array of a literal type w constexpr ctor
    constexpr B() : array{} { } // here is the problem 
};

int main()
{
  constexpr B b{};  // won't compile
}

But i get the following output with g++4.6.1:
<output>
In function 'int main()':
<file>.cpp:11:17: error: '{{{A()}}}' is not a constant expression
</output>

FYI, the following does compile:
int main() { constexpr A a[1]{}; }


Thanks!
p.s


My gcc -v output is:
Using built-in specs.
COLLECT_GCC=g++-4.6.1
COLLECT_LTO_WRAPPER=/usr/local/gcc4.6.1/libexec/gcc/i686-pc-linux-gnu/4.6.1/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: ../gcc-4.6.1/configure --prefix=/usr/local/gcc4.6.1
--enable-generated-files-in-srcdir --enable-threads=posix --with-system-zlib
--enable-__cxa_atexit --disable-checking --disable-nls --enable-bootstrap
--with-gcc --with-gnu-as --with-gnu-ld --disable-multilib
Thread model: posix
gcc version 4.6.1 (GCC)