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Update protect.hpp to use perfect forwarding on C++11

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This commit is contained in:
Peter Dimov
2020-06-30 21:31:46 +03:00
parent 8cea63f1c9
commit 3cbcd02965
1 changed files with 40 additions and 8 deletions
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48
include/boost/bind/protect.hpp
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@ -2,10 +2,10 @@
#define BOOST_BIND_PROTECT_HPP_INCLUDED
//
// protect.hpp
// protect.hpp
//
// Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
// Copyright (c) 2009 Steven Watanabe
// Copyright 2002, 2020 Peter Dimov
// Copyright 2009 Steven Watanabe
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
@ -13,7 +13,8 @@
//
#include <boost/config.hpp>
#include <boost/detail/workaround.hpp>
#include <boost/config/workaround.hpp>
#include <utility>
namespace boost
{
@ -21,8 +22,41 @@ namespace boost
namespace _bi
{
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && !defined(BOOST_NO_CXX11_DECLTYPE)
template<class F> class protected_bind_t
{
private:
F f_;
public:
typedef typename F::result_type result_type;
explicit protected_bind_t( F f ): f_( f )
{
}
template<class... A> auto operator()( A&&... a ) -> decltype( f_( std::forward<A>(a)... ) )
{
return f_( std::forward<A>(a)... );
}
template<class... A> auto operator()( A&&... a ) const -> decltype( f_( std::forward<A>(a)... ) )
{
return f_( std::forward<A>(a)... );
}
};
#else
template<class F> class protected_bind_t
{
private:
F f_;
public:
typedef typename F::result_type result_type;
@ -286,12 +320,10 @@ public:
}
#endif
private:
F f_;
};
#endif
} // namespace _bi
template<class F> _bi::protected_bind_t<F> protect(F f)