Numeric Constants
Overview
Contains all constants provided by C++20’s <numbers> specialized for the decimal types. These do not require C++20.
Symbol |
Value |
e_v |
|
log2e_v |
log2(e) |
log10e_v |
log10(e) |
pi_v |
|
inv_pi_v |
1/pi |
inv_sqrtpi_v |
1 / sqrt(pi) |
ln2_v |
ln(2) where ln is the natural log |
ln10_v |
ln(10) |
sqrt2_v |
sqrt(2) |
sqrt3_v |
sqrt(3) |
sqrt10_v |
sqrt(10) |
inv_sqrt3_v |
1 / sqrt(3) |
cbrt2_v |
cbrt(2) |
cbrt10_v |
cbrt(10) |
egamma_v |
|
phi_v |
There are also non-template variables that provide the constant as a decimal64_t type.
Reference
#include <boost/decimal/numbers.hpp>
namespace boost {
namespace decimal {
template <typename Decimal>
static constexpr Decimal e_v;
template <typename Decimal>
static constexpr Decimal log2e_v;
template <typename Decimal>
static constexpr Decimal log10e_v;
template <typename Decimal>
static constexpr Decimal pi_v;
template <typename Decimal>
static constexpr Decimal inv_pi_v;
template <typename Decimal>
static constexpr Decimal inv_sqrtpi_v;
template <typename Decimal>
static constexpr Decimal ln2_v;
template <typename Decimal>
static constexpr Decimal ln10_v;
template <typename Decimal>
static constexpr Decimal sqrt2_v;
template <typename Decimal>
static constexpr Decimal sqrt3_v;
template <typename Decimal>
static constexpr Decimal sqrt10_v;
template <typename Decimal>
static constexpr Decimal inv_sqrt2_v;
template <typename Decimal>
static constexpr Decimal inv_sqrt3_v;
template <typename Decimal>
static constexpr Decimal cbrt2_v;
template <typename Decimal>
static constexpr Decimal cbrt10_v;
template <typename Decimal>
static constexpr Decimal egamma_v;
template <typename Decimal>
static constexpr Decimal phi_v;
static constexpr decimal64_t e {e_v<decimal64_t>};
static constexpr decimal64_t log2e {log2e_v<decimal64_t>};
static constexpr decimal64_t log10e {log10e_v<decimal64_t>};
static constexpr decimal64_t pi {pi_v<decimal64_t>};
static constexpr decimal64_t inv_pi {inv_pi_v<decimal64_t>};
static constexpr decimal64_t inv_sqrtpi {inv_sqrtpi_v<decimal64_t>};
static constexpr decimal64_t ln2 {ln2_v<decimal64_t>};
static constexpr decimal64_t ln10 {ln10_v<decimal64_t>};
static constexpr decimal64_t sqrt2 {sqrt2_v<decimal64_t>};
static constexpr decimal64_t sqrt3 {sqrt3_v<decimal64_t>};
static constexpr decimal64_t sqrt10 {sqrt10_v<decimal64_t>};
static constexpr decimal64_t inv_sqrt2 {inv_sqrt2_v<decimal64_t>};
static constexpr decimal64_t inv_sqrt3 {inv_sqrt3_v<decimal64_t>};
static constexpr decimal64_t cbrt2 {cbrt2_v<decimal64_t>};
static constexpr decimal64_t cbrt10 {cbrt10_v<decimal64_t>};
static constexpr decimal64_t egamma {egamma_v<decimal64_t>};
static constexpr decimal64_t phi {phi_v<decimal64_t>};
} //namespace decimal
} //namespace boost