libs/type_traits/doc/make_signed.qbk
[/ Copyright 2007 John Maddock. Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt). ] [section:make_signed make_signed] template <class T> struct make_signed { typedef __below type; }; template <class T> using make_signed_t = typename make_signed<T>::type; // C++11 and above __type If T is a signed integer type then the same type as T, if T is an unsigned integer type then the corresponding signed type. Otherwise if T is an enumerated or character type (char or wchar_t) then a signed integer type with the same width as T. If T has any cv-qualifiers then these are also present on the result type. [*Requires:] T must be an integer or enumerated type, and must not be the type bool. __std_ref 3.9.1. [all_compilers] __header ` #include <boost/type_traits/make_signed.hpp>` or ` #include <boost/type_traits.hpp>` [table Examples [ [Expression] [Result Type]] [[`make_signed<int>::type`][`int`]] [[`make_signed<unsigned int const>::type`] [`int const`]] [[`make_signed<const unsigned long long>::type`] [`const long long`]] [[`make_signed<my_enum>::type`] [A signed integer type with the same width as the enum.]] [[`make_signed<wchar_t>::type`] [A signed integer type with the same width as wchar_t.]] ] [endsect]