feedc0de/boost_tuple
1
0
Fork 0
forked from boostorg/tuple
Code Pull Requests Activity

MSVC version of get<N> can now handle const tuples properly

Browse Source 
Testcase for const tuples added


[SVN r10986]
This commit is contained in:
Douglas Gregor
2001-09-01 01:52:14 +00:00
parent 3bbc493fc1
commit b9cb417106
2 changed files with 33 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
include/boost/tuple/detail/tuple_basic_no_partial_spec.hpp
View File

@ -264,18 +264,18 @@ namespace boost {
template<int N>
struct element
{
template<typename Tuple>
template<typename Head, typename Tail>
static inline
typename detail::tuples::tuple_element_ref<N, Tuple>::RET
get(Tuple& t)
typename detail::tuples::tuple_element_ref<N, cons<Head, Tail> >::RET
get(cons<Head, Tail>& t)
{
return element<N-1>::get(t.tail);
}
template<typename Tuple>
template<typename Head, typename Tail>
static inline
typename detail::tuples::tuple_element_const_ref<N, Tuple>::RET
get(const Tuple& t)
typename detail::tuples::tuple_element_const_ref<N, cons<Head, Tail> >::RET
get(const cons<Head, Tail>& t)
{
return element<N-1>::get(t.tail);
}
@ -284,18 +284,18 @@ namespace boost {
template<>
struct element<0>
{
template<typename Tuple>
template<typename Head, typename Tail>
static inline
typename add_reference<typename Tuple::head_type>::type
get(Tuple& t)
typename add_reference<Head>::type
get(cons<Head, Tail>& t)
{
return t.head;
}
template<typename Tuple>
template<typename Head, typename Tail>
static inline
typename add_reference<const typename Tuple::head_type>::type
get(const Tuple& t)
typename add_reference<const Head>::type
get(const cons<Head, Tail>& t)
{
return t.head;
}
@ -361,22 +361,25 @@ namespace boost {
}
};
// Retrieve the Nth element in the typle
template<int N, typename Tuple>
typename detail::tuples::tuple_element_ref<N, Tuple>::RET
get(Tuple& t)
namespace detail {
namespace tuples {
template<int N> struct workaround_holder {};
}}
template<int N, typename Head, typename Tail>
typename detail::tuples::tuple_element_ref<N, cons<Head, Tail> >::RET
get(cons<Head, Tail>& t, detail::tuples::workaround_holder<N>* = 0)
{
return element<N>::get(t);
}
// Retrieve the Nth element in the typle
template<int N, typename Tuple>
typename detail::tuples::tuple_element_const_ref<N, Tuple>::RET
get(const Tuple& t)
template<int N, typename Head, typename Tail>
typename detail::tuples::tuple_element_const_ref<N, cons<Head, Tail> >::RET
get(const cons<Head, Tail>& t, detail::tuples::workaround_holder<N>* = 0)
{
return element<N>::get(t);
}
// Make a tuple
template<typename T1>
inline