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// -*- C++ -*- (c) 2013 Vladimír Štill
#if __cplusplus >= 201103L
#include <utility>
#include <type_traits>
#ifndef WIBBLE_RAII_H
#define WIBBLE_RAII_H
namespace wibble {
namespace raii {
template< typename Instance,
typename Delete = void(*)( typename std::remove_reference< Instance >::type & ) >
struct AutoDelete {
Instance value;
Delete deleter;
AutoDelete( Instance &&instance, Delete deleter ) :
AutoDelete( true, std::forward< Instance >( instance ), deleter )
{ }
AutoDelete( bool runDeleter, Instance &&instance, Delete deleter ) :
value( std::forward< Instance >( instance ) ),
deleter( deleter ), runDeleter( runDeleter )
{ }
~AutoDelete() {
if ( runDeleter )
deleter( value );
}
private:
bool runDeleter;
};
template< typename Creator, typename Delete >
auto autoDeleter( Creator creator, Delete deleter )
-> AutoDelete< typename std::result_of< Creator() >::type, Delete >
{
using Instance = typename std::result_of< Creator() >::type;
return AutoDelete< Instance, Delete >( true, creator(), deleter );
}
template< typename Instance, typename Delete >
auto refDeleteIf( bool cond, Instance &ref, Delete deleter )
-> AutoDelete< Instance &, Delete >
{
return AutoDelete< Instance &, Delete >( cond, ref, deleter );
}
template< typename Instance, typename Delete >
auto refDeleter( Instance &ref, Delete deleter )
-> AutoDelete< Instance &, Delete >
{
return refDeleteIf( true, ref, deleter );
}
}
}
#endif // WIBBLE_RAII_H
#endif
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