from_value.h

 
//          Copyright John McFarlane 2019.
// 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)
 
#if !defined(CNL_IMPL_ELASTIC_INTEGER_FROM_VALUE_H)
#define CNL_IMPL_ELASTIC_INTEGER_FROM_VALUE_H
 
#include "../../constant.h"
#include "../num_traits/digits.h"
#include "../num_traits/from_value.h"
#include "../num_traits/set_width.h"
#include "../num_traits/width.h"
#include "definition.h"
 
namespace cnl {
    template<int Digits, class Narrowest, class Value>
    struct from_value<elastic_integer<Digits, Narrowest>, Value>
        : _impl::from_value_simple<
                  elastic_integer<
                          digits_v<Value>,
                          _impl::set_width_t<Value, _impl::width<Narrowest>>>,
                  Value> {
    };
 
    template<int Digits, typename Narrowest, int ValueDigits, typename ValueNarrowest>
    struct from_value<
            elastic_integer<Digits, Narrowest>, elastic_integer<ValueDigits, ValueNarrowest>>
        : _impl::from_value_simple<
                  elastic_integer<ValueDigits, Narrowest>,
                  elastic_integer<ValueDigits, Narrowest>> {
    };
 
    template<int Digits, class Narrowest, CNL_IMPL_CONSTANT_VALUE_TYPE Value>
    struct from_value<elastic_integer<Digits, Narrowest>, constant<Value>>
        : _impl::from_value_simple<
                  elastic_integer<digits_v<constant<Value>>, int>, constant<Value>> {
    };
}
 
#endif  // CNL_IMPL_ELASTIC_INTEGER_FROM_VALUE_H