43 lines
1.7 KiB
Plaintext
43 lines
1.7 KiB
Plaintext
[/
|
|
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]
|