FM / type_erasure

/usr/include/boost/type_erasure

Name	Size	Mode	Actions
detail/	-	0755	rm
any.hpp	104285	0644	edit dl rm
any_cast.hpp	5492	0644	edit dl rm
binding.hpp	9045	0644	edit dl rm
binding_of.hpp	763	0644	edit dl rm
builtin.hpp	4318	0644	edit dl rm
call.hpp	21940	0644	edit dl rm
callable.hpp	13126	0644	edit dl rm
check_match.hpp	8181	0644	edit dl rm
concept_interface.hpp	1876	0644	edit dl rm
concept_of.hpp	1456	0644	edit dl rm
config.hpp	862	0644	edit dl rm
constructible.hpp	5344	0644	edit dl rm
deduced.hpp	1575	0644	edit dl rm
derived.hpp	927	0644	edit dl rm
dynamic_any_cast.hpp	8239	0644	edit dl rm
dynamic_binding.hpp	1099	0644	edit dl rm
exception.hpp	848	0644	edit dl rm
free.hpp	22187	0644	edit dl rm
is_empty.hpp	605	0644	edit dl rm
is_placeholder.hpp	830	0644	edit dl rm
is_subconcept.hpp	5377	0644	edit dl rm
iterator.hpp	9799	0644	edit dl rm
member.hpp	16813	0644	edit dl rm
operators.hpp	23235	0644	edit dl rm
param.hpp	9026	0644	edit dl rm
placeholder.hpp	2107	0644	edit dl rm
placeholder_of.hpp	1480	0644	edit dl rm
rebind_any.hpp	2018	0644	edit dl rm
register_binding.hpp	6431	0644	edit dl rm
relaxed.hpp	2646	0644	edit dl rm
require_match.hpp	7418	0644	edit dl rm
same_type.hpp	942	0644	edit dl rm
static_binding.hpp	831	0644	edit dl rm
tuple.hpp	17723	0644	edit dl rm
typeid_of.hpp	1866	0644	edit dl rm

Edit: /usr/include/boost/type_erasure/placeholder.hpp (2107B)

// Boost.TypeErasure library
//
// Copyright 2011 Steven Watanabe
//
// 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)
//
// $Id$

#ifndef BOOST_TYPE_ERASURE_PLACEHOLDERS_HPP_INCLUDED
#define BOOST_TYPE_ERASURE_PLACEHOLDERS_HPP_INCLUDED

namespace boost {
namespace type_erasure {

/**
 * Placeholders are used heavily throughout the library.
 * Every placeholder must derive from @ref placeholder.
 * The library provides a number of placeholders,
 * out of the box, but you are welcome to define your own,
 * if you want more descriptive names.  The placeholder
 * @ref _self is special in that it is used as the default
 * wherever possible.
 *
 * What exactly is a placeholder?  Placeholders act as
 * a substitute for template parameters in concepts.
 * The library automatically replaces all the placeholders
 * used in a concept with the actual types involved when
 * it stores an object in an @ref any.
 *
 * For example, in the following,
 *
 * @code
 * any<copy_constructible<_a>, _a> x(1);
 * @endcode
 *
 * The library sees that we're constructing an @ref any
 * that uses the @ref _a placeholder with an @c int.
 * Thus it binds @ref _a to int and instantiates
 * @ref copy_constructible "copy_constructible<int>".
 *
 * When there are multiple placeholders involved, you
 * will have to use @ref tuple, or pass the bindings
 * explicitly, but the substitution still works the
 * same way.
 */
struct placeholder {
    /// INTERNAL ONLY
    typedef void _boost_type_erasure_is_placeholder;
};

struct _a : placeholder {};
struct _b : placeholder {};
struct _c : placeholder {};
struct _d : placeholder {};
struct _e : placeholder {};
struct _f : placeholder {};
struct _g : placeholder {};

/**
 * \brief The default placeholder
 *
 * @ref _self is the default @ref placeholder used
 * by @ref any.  It should be used as a default
 * by most concepts, so using concepts with no
 * explicit arguments will "just work" as much as
 * possible.
 */
struct _self : placeholder {};

}
}

#endif

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