python/include/boost/python/detail/dependent.hpp at python · boostorg/python · GitHub

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// Copyright David Abrahams 2002.

// 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)

#ifndef DEPENDENT_DWA200286_HPP

# define DEPENDENT_DWA200286_HPP

namespace boost { namespace python { namespace detail {

// A way to turn a concrete type T into a type dependent on U. This

// keeps conforming compilers (those implementing proper 2-phase

// name lookup for templates) from complaining about incomplete

// types in situations where it would otherwise be inconvenient or

// impossible to re-order code so that all types are defined in time.

// One such use is when we must return an incomplete T from a member

// function template (which must be defined in the class body to

// keep MSVC happy).

template <class T, class U>

struct dependent

{

typedef T type;

};

}}} // namespace boost::python::detail

#endif // DEPENDENT_DWA200286_HPP

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