------- Comment #2 from paolo dot carlini at oracle dot com  2010-07-17 00:56 
-------
I don't think this is a library issue, the implementation is straightforward.
The below C++03 snippet already shows the problem, is rejected (ICC likes it).

Jason, can you have a look to this one too?

////////////////

template<bool, typename T = void> struct enable_if { typedef T type; };
template<typename T> struct enable_if<false, T> { };

template<typename Tp, typename Arg1, typename Arg2>
  class mini_is_constructible
  {
    typedef char one;
    typedef struct { char arr[2]; } two;

    template<typename Tp1, typename Arg1_, typename Arg2_>
      static typename
      enable_if<(sizeof(Tp1(Arg1_(), Arg2_()), 1) > 0), one>::type
      test(int);

    template<typename, typename, typename>
      static two test(...);

  public:
    static const bool value = sizeof(test<Tp, Arg1, Arg2>(0)) == 1;
  };

class A { };

int Test[mini_is_constructible<int, A, A>::value ? -1 : 1];


-- 

paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jason at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44969

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