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added case for equal_to that returns false immediately if the tags are different in the first place

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[SVN r73685]
This commit is contained in:
Joel de Guzman
2011-08-12 05:13:03 +00:00
parent 48a0546eea
commit 744dbcbbc7
2 changed files with 29 additions and 10 deletions
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19
include/boost/fusion/iterator/iterator_adapter.hpp
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@ -9,6 +9,7 @@
#include <boost/fusion/iterator/detail/advance.hpp>
#include <boost/fusion/iterator/iterator_facade.hpp>
#include <boost/type_traits/remove_const.hpp>
namespace boost { namespace fusion
{
@ -18,7 +19,9 @@ namespace boost { namespace fusion
Derived_
, typename Iterator_::category>
{
typedef Iterator_ iterator_base_type;
typedef typename
remove_const<Iterator_>::type
iterator_base_type;
iterator_base_type iterator_base;
iterator_adapter(iterator_base_type const& iterator_base)
@ -36,12 +39,18 @@ namespace boost { namespace fusion
// default implementation
template <typename Iterator, typename N>
struct advance
: Derived_::template make<
{
typedef typename Derived_::template make<
typename result_of::advance<
typename Iterator::iterator_base_type, N
>::type
>
{
>::type>::type
type;
static type
call(Iterator const& it)
{
return type(fusion::advance<N>(it.iterator_base));
}
};
// default implementation