Fixed-point decimal data type and related functions.
Classes | |
class | CeilingRoundPolicy |
Round towards +infinity. More... | |
class | Decimal |
Fixed-point decimal data type for use in deterministic calculations, oftentimes involving money. More... | |
class | DecimalError |
The base class for Decimal-related exceptions. More... | |
class | DefRoundPolicy |
Default rounding. Fast, rounds to nearest. More... | |
class | DivisionByZeroError |
Thrown on division by zero in Decimal arithmetic. More... | |
class | FloorRoundPolicy |
Round towards -infinity. More... | |
struct | FormatOptions |
Parameters for flexible decimal formatting. More... | |
class | HalfDownRoundPolicy |
Round to nearest, 0.5 towards zero. More... | |
class | HalfEvenRoundPolicy |
Round to nearest, 0.5 towards number with even last digit. More... | |
class | HalfUpRoundPolicy |
Round to nearest, 0.5 away from zero. More... | |
class | OutOfBoundsError |
Thrown on overflow in Decimal arithmetic. More... | |
class | ParseError |
Thrown on all errors related to parsing Decimal from string. More... | |
class | RoundDownRoundPolicy |
Round towards zero. The fastest rounding. More... | |
class | RoundUpRoundPolicy |
Round away from zero. More... | |
Functions | |
constexpr int64_t | Pow10 (int exp) |
A fast, constexpr-friendly power of 10. | |
template<typename T , int OldPrec, typename OldRound > | |
constexpr T | decimal_cast (Decimal< OldPrec, OldRound > arg) |
Cast one Decimal to another Decimal type. | |
template<int Prec, typename RoundPolicy > | |
std::string | ToString (Decimal< Prec, RoundPolicy > dec) |
Converts Decimal to a string. | |
template<int Prec, typename RoundPolicy > | |
std::string | ToString (const Decimal< Prec, RoundPolicy > &dec, const FormatOptions &format_options) |
Converts Decimal to a string. | |
template<int Prec, typename RoundPolicy > | |
std::string | ToStringTrailingZeros (Decimal< Prec, RoundPolicy > dec) |
Converts Decimal to a string, writing exactly Prec decimal digits. | |
template<int NewPrec, int Prec, typename RoundPolicy > | |
std::string | 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 > & | 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 > & | 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 & | 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 > > | Parse (const Value &value, formats::parse::To< Decimal< Prec, RoundPolicy > >) |
Parses the Decimal from the string. | |
template<int Prec, typename RoundPolicy , typename TargetType > | |
TargetType | Serialize (const Decimal< Prec, RoundPolicy > &object, formats::serialize::To< TargetType >) |
Serializes the Decimal to string. | |
template<int Prec, typename RoundPolicy , typename StringBuilder > | |
void | WriteToStream (const Decimal< Prec, RoundPolicy > &object, StringBuilder &sw) |
Writes the Decimal to stream. | |
template<int Prec, typename RoundPolicy > | |
void | PrintTo (const Decimal< Prec, RoundPolicy > &v, std::ostream *os) |
Variables | |
template<int Exp> | |
constexpr int64_t | kPow10 = Pow10(Exp) |
A guaranteed-compile-time power of 10. | |
template<typename T > | |
constexpr bool | kIsDecimal = impl::IsDecimal<T>::value |
true if the type is an instantiation of Decimal | |
|
constexpr |
Cast one Decimal
to another Decimal
type.
When casting to a Decimal
with a lower Prec
, rounding is performed according to the new RoundPolicy
.
Usage example:
Definition at line 843 of file decimal64.hpp.
logging::LogHelper & decimal64::operator<< | ( | logging::LogHelper & | lh, |
const Decimal< Prec, RoundPolicy > & | d ) |
std::basic_ostream< CharT, Traits > & decimal64::operator<< | ( | std::basic_ostream< CharT, Traits > & | os, |
const Decimal< Prec, RoundPolicy > & | d ) |
std::basic_istream< CharT, Traits > & decimal64::operator>> | ( | std::basic_istream< CharT, Traits > & | is, |
Decimal< Prec, RoundPolicy > & | d ) |
Parses a Decimal
from the istream
Acts like the Decimal(str)
constructor, except that it allows junk that immediately follows the number. Sets the stream's fail bit on failure.
Usage example:
if (os >> dec) { // success } else { // failure }
Definition at line 1371 of file decimal64.hpp.
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.
Definition at line 1411 of file decimal64.hpp.
|
constexpr |
A fast, constexpr-friendly power of 10.
Definition at line 307 of file decimal64.hpp.
void decimal64::PrintTo | ( | const Decimal< Prec, RoundPolicy > & | v, |
std::ostream * | os ) |
TargetType decimal64::Serialize | ( | const Decimal< Prec, RoundPolicy > & | object, |
formats::serialize::To< TargetType > | ) |
std::string decimal64::ToString | ( | const Decimal< Prec, RoundPolicy > & | dec, |
const FormatOptions & | format_options ) |
Converts Decimal to a string.
Usage example:
ToString(decimal64::Decimal<4>{"-1234.1234"}, {"||", "**", "\1", "<>", {}, true})) -> "<>1**2**3**4||1234" ToString(decimal64::Decimal<4>{"-1234.1234"}, {",", " ", "\3", "-", 6, true})) -> "-1 234,123400"
Definition at line 1319 of file decimal64.hpp.
std::string decimal64::ToString | ( | Decimal< Prec, RoundPolicy > | dec | ) |
Converts Decimal to a string.
Usage example:
ToString(decimal64::Decimal<4>{"1.5"}) -> 1.5
Definition at line 1303 of file decimal64.hpp.
std::string decimal64::ToStringFixed | ( | Decimal< Prec, RoundPolicy > | dec | ) |
Converts Decimal to a string with exactly NewPrec
decimal digits.
Usage example:
ToStringFixed<3>(decimal64::Decimal<4>{"1.5"}) -> 1.500
Definition at line 1351 of file decimal64.hpp.
std::string decimal64::ToStringTrailingZeros | ( | Decimal< Prec, RoundPolicy > | dec | ) |
Converts Decimal to a string, writing exactly Prec
decimal digits.
Usage example:
ToStringTrailingZeros(decimal64::Decimal<4>{"1.5"}) -> 1.5000
Definition at line 1338 of file decimal64.hpp.
void decimal64::WriteToStream | ( | const Decimal< Prec, RoundPolicy > & | object, |
StringBuilder & | sw ) |
|
inlineconstexpr |
true
if the type is an instantiation of Decimal
Definition at line 827 of file decimal64.hpp.
|
inlineconstexpr |
A guaranteed-compile-time power of 10.
Definition at line 316 of file decimal64.hpp.