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[/
Copyright 2011 - 2020 John Maddock.
Copyright 2013 - 2019 Paul A. Bristow.
Copyright 2013 Christopher Kormanyos.
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:cpp_dec_ref cpp_dec_float]
namespace boost{ namespace multiprecision{
template <unsigned Digits10, class ExponentType = std::int32_t, class Allocator = void>
class cpp_dec_float;
typedef number<cpp_dec_float<50> > cpp_dec_float_50;
typedef number<cpp_dec_float<100> > cpp_dec_float_100;
}} // namespaces
Class template `cpp_dec_float` fulfils all of the requirements for a [link boost_multiprecision.ref.backendconc Backend] type.
Its members and non-member functions are deliberately not documented: these are considered implementation details that are subject
to change.
The class takes three template parameters:
[variablelist
[[Digits10][The number of decimal digits precision the type
should support. Note that this type does not normally perform any dynamic memory allocation, and as a result the `Digits10`
template argument should not be set too high or the class's size will grow unreasonably large.]]
[[ExponentType][A signed integer type that represents the exponent of the number]]
[[Allocator][The allocator used: defaults to type `void`, meaning all storage is within the class, and no dynamic
allocation is performed, but can be set to a standard library allocator if dynamic allocation makes more sense.]]
]
The type of `number_category<cpp_dec_float<Args...> >::type` is `std::integral_constant<int, number_kind_floating_point>`.
More information on this type can be found in the [link boost_multiprecision.tut.floats.cpp_dec_float tutorial].
[endsect]
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