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Diffstat (limited to '3rdParty/Boost/src/boost/utility/declval.hpp')
| -rw-r--r-- | 3rdParty/Boost/src/boost/utility/declval.hpp | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/utility/declval.hpp b/3rdParty/Boost/src/boost/utility/declval.hpp new file mode 100644 index 0000000..41ec3dc --- /dev/null +++ b/3rdParty/Boost/src/boost/utility/declval.hpp @@ -0,0 +1,44 @@ +// common_type.hpp ---------------------------------------------------------// + +// Copyright 2010 Vicente J. Botet Escriba + +// Distributed under the Boost Software License, Version 1.0. +// See http://www.boost.org/LICENSE_1_0.txt + +#ifndef BOOST_TYPE_TRAITS_EXT_DECLVAL__HPP +#define BOOST_TYPE_TRAITS_EXT_DECLVAL__HPP + +#include <boost/config.hpp> + +//----------------------------------------------------------------------------// + +#include <boost/type_traits/add_rvalue_reference.hpp> + +//----------------------------------------------------------------------------// +// // +// C++03 implementation of // +// Written by Vicente J. Botet Escriba // +//~ 20.3.4 Function template declval [declval] +//~ 1 The library provides the function template declval to simplify the definition of expressions which occur as +//~ unevaluated operands. +//~ 2 Remarks: If this function is used, the program is ill-formed. +//~ 3 Remarks: The template parameter T of declval may be an incomplete type. +//~ [ Example: + +//~ template <class To, class From> +//~ decltype(static_cast<To>(declval<From>())) convert(From&&); + +//~ declares a function template convert which only participats in overloading if the type From can be +//~ explicitly converted to type To. For another example see class template common_type (20.7.6.6). —end +//~ example ] +// // +//----------------------------------------------------------------------------// + +namespace boost { + + template <typename T> + typename add_rvalue_reference<T>::type declval(); //noexcept; // as unevaluated operand + +} // namespace boost + +#endif // BOOST_TYPE_TRAITS_EXT_DECLVAL__HPP |