mirror of
https://github.com/boostorg/fusion.git
synced 2026-01-19 16:22:13 +00:00
ce8b031f54
Compilers implement a multiple-include optimization where they avoid preprocessing an included file if it is "properly guarded". Compilers differ as to what constitutes a "properly guarded" file. In particular, Microsoft Visual Studio does not recognize `#if !defined(GUARD)` for the optimization. This does not affect the correctness of using Fusion on Microsoft Visual Studio, but it will increase the time taken to build any project on this compiler. This commit changes all include guards to use `#ifndef`, but leaves all other `#if !defined` preprocessor directives that are not related to guarding a file. Co-authored-by: IncludeGuardian <hello@includeguardian.io>
71 lines
2.0 KiB
C++
71 lines
2.0 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2001-2011 Joel de Guzman
|
|
Copyright (c) 2005-2006 Dan Marsden
|
|
|
|
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 BOOST_FUSION_EXAMPLE_STRUCT_ITERATOR
|
|
#define BOOST_FUSION_EXAMPLE_STRUCT_ITERATOR
|
|
|
|
#include <boost/fusion/support/iterator_base.hpp>
|
|
#include <boost/fusion/support/category_of.hpp>
|
|
#include <boost/fusion/support/tag_of_fwd.hpp>
|
|
#include <boost/mpl/int.hpp>
|
|
#include <boost/type_traits/add_const.hpp>
|
|
#include <boost/static_assert.hpp>
|
|
|
|
#include "./detail/next_impl.hpp"
|
|
#include "./detail/prior_impl.hpp"
|
|
#include "./detail/deref_impl.hpp"
|
|
#include "./detail/advance_impl.hpp"
|
|
#include "./detail/distance_impl.hpp"
|
|
#include "./detail/value_of_impl.hpp"
|
|
#include "./detail/equal_to_impl.hpp"
|
|
#include "./detail/key_of_impl.hpp"
|
|
#include "./detail/value_of_data_impl.hpp"
|
|
#include "./detail/deref_data_impl.hpp"
|
|
|
|
namespace example
|
|
{
|
|
struct example_struct_iterator_tag;
|
|
|
|
template<typename Struct, int Pos>
|
|
struct example_struct_iterator;
|
|
}
|
|
|
|
namespace boost { namespace fusion {
|
|
|
|
namespace traits
|
|
{
|
|
template<typename Struct, int Pos>
|
|
struct tag_of<example::example_struct_iterator<Struct, Pos> >
|
|
{
|
|
typedef example::example_struct_iterator_tag type;
|
|
};
|
|
}
|
|
}}
|
|
|
|
namespace example {
|
|
template<typename Struct, int Pos>
|
|
struct example_struct_iterator
|
|
: boost::fusion::iterator_base<example_struct_iterator<Struct, Pos> >
|
|
{
|
|
BOOST_STATIC_ASSERT(Pos >=0 && Pos < 3);
|
|
typedef Struct struct_type;
|
|
typedef boost::mpl::int_<Pos> index;
|
|
|
|
struct category
|
|
: boost::fusion::random_access_traversal_tag
|
|
, boost::fusion::associative_tag
|
|
{};
|
|
|
|
example_struct_iterator(Struct& str)
|
|
: struct_(str) {}
|
|
|
|
Struct& struct_;
|
|
};
|
|
}
|
|
|
|
#endif
|