x
Yes
No
Do you want to visit DriveHQ English website?
Inicio
Características
Precios
Prueba gratuita
Software cliente
Acerca de nosotros
Servidor de archivos
|
Solución de copias de seguridad
|
Servidor FTP
|
Servidor de correo electrónico
|
Alojamiento web
|
Software cliente
Servidor de archivos
Solución de copia de seguridad
Servidor FTP
Servidor de correo electrónico
Alojamiento web
Software cliente
facade_iterator_category.hpp - Hosted on DriveHQ Cloud IT Platform
Arriba
Subir
Descargar
Compartir
Publicar
Nueva carpeta
Nuevo archivo
Copiar
Cortar
Eliminar
Pegar
Clasificación
Actualizar
Ruta de la carpeta: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\iterator\detail\facade_iterator_category.hpp
Girar
Efecto
Propiedad
Historial
// Copyright David Abrahams 2003. Use, modification and distribution is // subject to 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 FACADE_ITERATOR_CATEGORY_DWA20031118_HPP # define FACADE_ITERATOR_CATEGORY_DWA20031118_HPP # include
# include
// used in iterator_tag inheritance logic # include
# include
# include
# include
# include
# include
# include
# include
# include
# include
# include
// try to keep this last # ifdef BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY # include
# endif // // iterator_category deduction for iterator_facade // // forward declaration namespace boost { struct use_default; } namespace boost { namespace detail { struct input_output_iterator_tag : std::input_iterator_tag { // Using inheritance for only input_iterator_tag helps to avoid // ambiguities when a stdlib implementation dispatches on a // function which is overloaded on both input_iterator_tag and // output_iterator_tag, as STLPort does, in its __valid_range // function. I claim it's better to avoid the ambiguity in these // cases. operator std::output_iterator_tag() const { return std::output_iterator_tag(); } }; // // True iff the user has explicitly disabled writability of this // iterator. Pass the iterator_facade's Value parameter and its // nested ::reference type. // template
struct iterator_writability_disabled # ifdef BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY // Adding Thomas' logic? : mpl::or_< is_const
, boost::detail::indirect_traits::is_reference_to_const
, is_const
> # else : is_const
# endif {}; // // Convert an iterator_facade's traversal category, Value parameter, // and ::reference type to an appropriate old-style category. // // If writability has been disabled per the above metafunction, the // result will not be convertible to output_iterator_tag. // // Otherwise, if Traversal == single_pass_traversal_tag, the following // conditions will result in a tag that is convertible both to // input_iterator_tag and output_iterator_tag: // // 1. Reference is a reference to non-const // 2. Reference is not a reference and is convertible to Value // template
struct iterator_facade_default_category : mpl::eval_if< mpl::and_< is_reference
, is_convertible
> , mpl::eval_if< is_convertible
, mpl::identity
, mpl::if_< is_convertible
, std::bidirectional_iterator_tag , std::forward_iterator_tag > > , typename mpl::eval_if< mpl::and_< is_convertible
// check for readability , is_convertible
> , mpl::identity
, mpl::identity
> > { }; // True iff T is convertible to an old-style iterator category. template
struct is_iterator_category : mpl::or_< is_convertible
, is_convertible
> { }; template
struct is_iterator_traversal : is_convertible
{}; // // A composite iterator_category tag convertible to Category (a pure // old-style category) and Traversal (a pure traversal tag). // Traversal must be a strict increase of the traversal power given by // Category. // template
struct iterator_category_with_traversal : Category, Traversal { # if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300) // Make sure this isn't used to build any categories where // convertibility to Traversal is redundant. Should just use the // Category element in that case. BOOST_MPL_ASSERT_NOT(( is_convertible< typename iterator_category_to_traversal
::type , Traversal >)); BOOST_MPL_ASSERT((is_iterator_category
)); BOOST_MPL_ASSERT_NOT((is_iterator_category
)); BOOST_MPL_ASSERT_NOT((is_iterator_traversal
)); # if !BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1310)) BOOST_MPL_ASSERT((is_iterator_traversal
)); # endif # endif }; // Computes an iterator_category tag whose traversal is Traversal and // which is appropriate for an iterator template
struct facade_iterator_category_impl { # if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300) BOOST_MPL_ASSERT_NOT((is_iterator_category
)); # endif typedef typename iterator_facade_default_category< Traversal,ValueParam,Reference >::type category; typedef typename mpl::if_< is_same< Traversal , typename iterator_category_to_traversal
::type > , category , iterator_category_with_traversal
>::type type; }; // // Compute an iterator_category for iterator_facade // template
struct facade_iterator_category : mpl::eval_if< is_iterator_category
, mpl::identity
// old-style categories are fine as-is , facade_iterator_category_impl
> { }; }} // namespace boost::detail # include
#endif // FACADE_ITERATOR_CATEGORY_DWA20031118_HPP
facade_iterator_category.hpp
Dirección de la página
Dirección del archivo
Anterior
5/6
Siguiente
Descargar
( 6 KB )
Comments
Total ratings:
0
Average rating:
No clasificado
of 10
Would you like to comment?
Join now
, or
Logon
if you are already a member.