uni20::Precision Class Reference

Exact arithmetic or an explicit binary working precision. More...

#include <precision.hpp>

Public Types
using	bit_count_type = std::int64_t

Public Member Functions
constexpr bit_count_type	bit_count () const
	Number of binary significand bits.
constexpr bool	is_exact () const noexcept
constexpr bool	operator== (Precision const &) const =default

Static Public Member Functions
static constexpr Precision	bits (bit_count_type count)
	Select a positive binary significand size.
static constexpr Precision	decimal_digits (std::int64_t count)
	Request at least this many decimal digits of significand precision.
static constexpr Precision	exact () noexcept
	No approximation has been selected; rational arithmetic remains exact.

Detailed Description

Exact arithmetic or an explicit binary working precision.

A provider-independent description, available in every build. It never changes numerical defaults. Providers validate their own ranges.

Member Typedef Documentation

bit_count_type

using uni20::Precision::bit_count_type = std::int64_t

Member Function Documentation

bit_count()

constexpr bit_count_type uni20::Precision::bit_count ( ) const

inlineconstexpr

Number of binary significand bits.

Exceptions

std::logic_error

If this precision denotes exact arithmetic.

bits()

static constexpr Precision uni20::Precision::bits ( bit_count_type  count )

inlinestaticconstexpr

Select a positive binary significand size.

decimal_digits()

static constexpr Precision uni20::Precision::decimal_digits ( std::int64_t  count )

inlinestaticconstexpr

Request at least this many decimal digits of significand precision.

Uses the upper bound 3.32193 for log2(10); may allocate extra bits.

exact()

static constexpr Precision uni20::Precision::exact ( )

inlinestaticconstexprnoexcept

No approximation has been selected; rational arithmetic remains exact.

is_exact()

constexpr bool uni20::Precision::is_exact ( ) const

inlineconstexprnoexcept

operator==()

constexpr bool uni20::Precision::operator== ( Precision const &  ) const

constexprdefault

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The documentation for this class was generated from the following file:

• core/precision.hpp