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added missing ifdef

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This commit is contained in:
Andrzej Krzemieński
2015-10-06 09:17:14 +02:00
parent b0d7786e14
commit 4939613070
1 changed files with 4 additions and 0 deletions
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4
include/boost/optional/detail/optional_reference_spec.hpp
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@ -18,6 +18,8 @@ namespace boost {
namespace detail { namespace detail {
#ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
template <class From> template <class From>
void prevent_binding_rvalue() void prevent_binding_rvalue()
{ {
@ -35,6 +37,8 @@ BOOST_DEDUCED_TYPENAME boost::remove_reference<T>::type& forward_reference(T&& r
return boost::forward<T>(r); return boost::forward<T>(r);
} }
#endif // BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
template <class T> template <class T>
struct is_optional_ struct is_optional_
{ {