Re: [boost] [type_traits] is_constructible, ... when decltype is supported?

On 05/06/2011 22:32, Vicente Botet wrote:

We can use it as the return type of the test function. FOr example to test if T can be constructed with two parameters A1, A2

decltype((T(declval<A1>(),declval<A2>()), true_type())) test(int); false_type test(...);

You realize you can do the same thing with sizeof in C++03, when BOOST_NO_SFINAE_EXPR is not defined? Also you shouldn't use decltype directly in the return type if you want portability, it caused mangling problems with some GCC versions. Attached is a C++03-compatible version.