decimal64.hpp File Reference

Decimal data type for fixed-point arithmetic. More...

#include <array>
#include <cassert>
#include <cstdint>
#include <ios>
#include <iosfwd>
#include <istream>
#include <limits>
#include <numeric>
#include <optional>
#include <stdexcept>
#include <string>
#include <string_view>
#include <type_traits>
#include <fmt/compile.h>
#include <fmt/format.h>
#include <userver/decimal64/format_options.hpp>
#include <userver/formats/common/meta.hpp>
#include <userver/utils/assert.hpp>
#include <userver/utils/flags.hpp>
#include <userver/utils/meta_light.hpp>

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Classes
class	decimal64::DecimalError
	The base class for Decimal-related exceptions. More...
class	decimal64::ParseError
	Thrown on all errors related to parsing Decimal from string. More...
class	decimal64::OutOfBoundsError
	Thrown on overflow in Decimal arithmetic. More...
class	decimal64::DivisionByZeroError
	Thrown on division by zero in Decimal arithmetic. More...
class	decimal64::DefRoundPolicy
	Default rounding. Fast, rounds to nearest. More...
class	decimal64::HalfDownRoundPolicy
	Round to nearest, 0.5 towards zero. More...
class	decimal64::HalfUpRoundPolicy
	Round to nearest, 0.5 away from zero. More...
class	decimal64::HalfEvenRoundPolicy
	Round to nearest, 0.5 towards number with even last digit. More...
class	decimal64::CeilingRoundPolicy
	Round towards +infinity. More...
class	decimal64::FloorRoundPolicy
	Round towards -infinity. More...
class	decimal64::RoundDownRoundPolicy
	Round towards zero. The fastest rounding. More...
class	decimal64::RoundUpRoundPolicy
	Round away from zero. More...
class	decimal64::Decimal< Prec, RoundPolicy_ >
	Fixed-point decimal data type for use in deterministic calculations, oftentimes involving money. More...
struct	std::hash<::decimal64::Decimal< Prec, RoundPolicy > >
	std::hash support More...
class	fmt::formatter<::decimal64::Decimal< Prec, RoundPolicy >, Char >
	fmt support More...

Namespaces
namespace	logging
	Logging macro and utilities.
namespace	decimal64
	Fixed-point decimal data type and related functions.

Functions
constexpr int64_t	decimal64::Pow10 (int exp)
	A fast, constexpr-friendly power of 10.
template<typename T , int OldPrec, typename OldRound >
constexpr T	decimal64::decimal_cast (Decimal< OldPrec, OldRound > arg)
	Cast one Decimal to another Decimal type.
template<int Prec, typename RoundPolicy >
std::string	decimal64::ToString (Decimal< Prec, RoundPolicy > dec)
	Converts Decimal to a string.
template<int Prec, typename RoundPolicy >
std::string	decimal64::ToString (const Decimal< Prec, RoundPolicy > &dec, const FormatOptions &format_options)
	Converts Decimal to a string.
template<int Prec, typename RoundPolicy >
std::string	decimal64::ToStringTrailingZeros (Decimal< Prec, RoundPolicy > dec)
	Converts Decimal to a string, writing exactly Prec decimal digits.
template<int NewPrec, int Prec, typename RoundPolicy >
std::string	decimal64::ToStringFixed (Decimal< Prec, RoundPolicy > dec)
	Converts Decimal to a string with exactly NewPrec decimal digits.
template<typename CharT , typename Traits , int Prec, typename RoundPolicy >
std::basic_istream< CharT, Traits > &	decimal64::operator>> (std::basic_istream< CharT, Traits > &is, Decimal< Prec, RoundPolicy > &d)
	Parses a Decimal from the istream
template<typename CharT , typename Traits , int Prec, typename RoundPolicy >
std::basic_ostream< CharT, Traits > &	decimal64::operator<< (std::basic_ostream< CharT, Traits > &os, const Decimal< Prec, RoundPolicy > &d)
	Writes the Decimal to the ostream
template<int Prec, typename RoundPolicy >
logging::LogHelper &	decimal64::operator<< (logging::LogHelper &lh, const Decimal< Prec, RoundPolicy > &d)
	Writes the Decimal to the logger.
template<int Prec, typename RoundPolicy , typename Value >
std::enable_if_t< formats::common::kIsFormatValue< Value >, Decimal< Prec, RoundPolicy > >	decimal64::Parse (const Value &value, formats::parse::To< Decimal< Prec, RoundPolicy > >)
	Parses the Decimal from the string.
template<int Prec, typename RoundPolicy , typename TargetType >
TargetType	decimal64::Serialize (const Decimal< Prec, RoundPolicy > &object, formats::serialize::To< TargetType >)
	Serializes the Decimal to string.
template<int Prec, typename RoundPolicy , typename StringBuilder >
void	decimal64::WriteToStream (const Decimal< Prec, RoundPolicy > &object, StringBuilder &sw)
	Writes the Decimal to stream.

Variables
template<int Exp>
constexpr int64_t	decimal64::kPow10 = Pow10(Exp)
	A guaranteed-compile-time power of 10.
template<typename T >
constexpr bool	decimal64::kIsDecimal = impl::IsDecimal<T>::value
	true if the type is an instantiation of Decimal

Detailed Description

Decimal data type for fixed-point arithmetic.

Definition in file decimal64.hpp.