c++ - Constructor and anonymous union with const members -

is possible have anonymous union const members? have following:

struct bar {   union {     struct { const int x, y; };     const int xy[2];   };   bar() : x(1), y(2) {} };

with g++ 4.5 error:

error: uninitialized member ‘bar::<anonymous union>::xy’ ‘const’ type ‘const int [2]’

this problem in gcc fixed in version 4.6. code works fine.

it still depends on gcc extension because uses anonymous struct, compilers support them now. also, following code builds -pedantic:

struct bar {   union {     const int x;     const int y;   };   bar() : x(1) {} };

that code accepted clang , visual studio 2010 (but fails 2008).

Barbera