boost_mirror/utility
1
0
Fork 0
mirror of https://github.com/boostorg/utility.git synced 2025-05-09 15:04:00 +00:00
Code Issues Packages Projects Releases Wiki Activity

Use std::iterator_traits to detect iterators, when possible.

Browse Source 
This allows next/prior to detect user's iterators that do not
define iterator_category nested type but specialize
std::iterator_traits instead.
This commit is contained in:
Andrey Semashev 2017-07-23 20:29:25 +03:00
parent 792d0538d2
commit 2722fdcda3
1 changed files with 10 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
include/boost/next_prior.hpp
View File

@ -52,7 +52,16 @@ struct is_iterator
}; };
template< typename T > template< typename T >
struct is_iterator< T, typename enable_if_has_type< typename T::iterator_category >::type > struct is_iterator<
T,
typename enable_if_has_type<
#if !defined(BOOST_NO_CXX17_ITERATOR_TRAITS)
typename std::iterator_traits< T >::iterator_category
#else
typename T::iterator_category
#endif
>::type
>
{ {
static BOOST_CONSTEXPR_OR_CONST bool value = true; static BOOST_CONSTEXPR_OR_CONST bool value = true;
}; };