[/ Copyright 2007 John Maddock. Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt). ] [section:is_complex is_complex] template struct is_complex : public __tof {}; __inherit If `T` is a complex number type then true (of type `std::complex` for some type `U`), otherwise false. __std_ref 26.2. [all_compilers] __header ` #include ` or ` #include ` [endsect]