/// @file

// Copyright (c) 2009-2016 Vladimir Batov.

// Use, modification and distribution are subject to the Boost Software License,

// Version 1.0. See http://www.boost.org/LICENSE_1_0.txt.

#ifndef BOOST_MAKE_DEFAULT_HPP

#define BOOST_MAKE_DEFAULT_HPP

namespace boost

{

    /// @details A considerable number of libraries require an instance of a class

    /// provided (storage created and initialized). For example,

    /// @code

    ///    Type result;

    ///    ...

    ///    istream >> result;

    /// @endcode

    /// In generic code that results in the Default Constructibility requirement imposed

    /// on every type 'Type' to be used with the respective code. Inevitably, that requirement

    /// a) either excludes all the classes that for various reasons do not meet that requirement or

    /// b) imposes certain (not necessarily desirable) design/implementation onto respective classes.

    ///

    /// Deployment of boost::make_default() eliminates the Default Constructibility requirement with

    /// @code

    ///    Type result = boost::make_default<Type>();

    ///    ...

    ///    istream >> result;

    /// @endcode

    /// Classes with no default constructor can now be included via a boost::make_default() specialization:

    /// @code

    /// namespace boost

    /// {

    ///     template<> inline Type make_default<Type>() { return Type(parameters); }

    /// }

    /// @endcode

    template<typename T> T make_default() { return T(); }

}

#endif // BOOST_MAKE_DEFAULT_HPP