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simplify code

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This commit is contained in:
Antony Polukhin
2023-08-26 21:45:41 +03:00
parent f7f3c9b5ce
commit 5a3587c988
1 changed files with 4 additions and 12 deletions
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16
include/boost/polymorphic_pointer_cast.hpp
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@@ -19,8 +19,6 @@
# include <boost/pointer_cast.hpp> # include <boost/pointer_cast.hpp>
# include <boost/throw_exception.hpp> # include <boost/throw_exception.hpp>
# include <utility> // std::declval
namespace boost namespace boost
{ {
@@ -40,23 +38,17 @@ namespace boost
// Contributed by Boris Rasin // Contributed by Boris Rasin
namespace detail
{
template <typename Target, typename Source> template <typename Target, typename Source>
using dynamic_pointer_cast_result = decltype(dynamic_pointer_cast<Target>(std::declval<Source>())); inline auto polymorphic_pointer_downcast (const Source& x)
} -> decltype(static_pointer_cast<Target>(x))
template <typename Target, typename Source>
inline detail::dynamic_pointer_cast_result<Target, Source>
polymorphic_pointer_downcast (const Source& x)
{ {
BOOST_ASSERT(dynamic_pointer_cast<Target> (x) == x); BOOST_ASSERT(dynamic_pointer_cast<Target> (x) == x);
return static_pointer_cast<Target> (x); return static_pointer_cast<Target> (x);
} }
template <typename Target, typename Source> template <typename Target, typename Source>
inline detail::dynamic_pointer_cast_result<Target, Source> inline auto polymorphic_pointer_cast (const Source& x)
polymorphic_pointer_cast (const Source& x) -> decltype(dynamic_pointer_cast<Target>(x))
{ {
auto tmp = dynamic_pointer_cast<Target> (x); auto tmp = dynamic_pointer_cast<Target> (x);
if ( !tmp ) boost::throw_exception( std::bad_cast() ); if ( !tmp ) boost::throw_exception( std::bad_cast() );