Struct rust_decimal::Decimal

#[repr(C)]
pub struct Decimal { /* private fields */ }

Expand description

Decimal represents a 128 bit representation of a fixed-precision decimal number. The finite set of values of type Decimal are of the form m / 10^e, where m is an integer such that -2⁹⁶ < m < 2⁹⁶, and e is an integer between 0 and 28 inclusive.

Implementations§

impl Decimal

pub const MIN: Decimal = MIN

The smallest value that can be represented by this decimal type.

§Examples

Basic usage:

assert_eq!(Decimal::MIN, dec!(-79_228_162_514_264_337_593_543_950_335));

pub const MAX: Decimal = MAX

The largest value that can be represented by this decimal type.

§Examples

Basic usage:

assert_eq!(Decimal::MAX, dec!(79_228_162_514_264_337_593_543_950_335));

pub const ZERO: Decimal = ZERO

A constant representing 0.

§Examples

Basic usage:

assert_eq!(Decimal::ZERO, dec!(0));

pub const ONE: Decimal = ONE

A constant representing 1.

§Examples

Basic usage:

assert_eq!(Decimal::ONE, dec!(1));

pub const NEGATIVE_ONE: Decimal = NEGATIVE_ONE

A constant representing -1.

§Examples

Basic usage:

assert_eq!(Decimal::NEGATIVE_ONE, dec!(-1));

pub const TWO: Decimal = TWO

A constant representing 2.

§Examples

Basic usage:

assert_eq!(Decimal::TWO, dec!(2));

pub const TEN: Decimal = TEN

A constant representing 10.

§Examples

Basic usage:

assert_eq!(Decimal::TEN, dec!(10));

pub const ONE_HUNDRED: Decimal = ONE_HUNDRED

A constant representing 100.

§Examples

Basic usage:

assert_eq!(Decimal::ONE_HUNDRED, dec!(100));

pub const ONE_THOUSAND: Decimal = ONE_THOUSAND

A constant representing 1000.

§Examples

Basic usage:

assert_eq!(Decimal::ONE_THOUSAND, dec!(1000));

pub const PI: Decimal = _

Available on crate feature maths only.

A constant representing π as 3.1415926535897932384626433833

§Examples

Basic usage:

assert_eq!(Decimal::PI, dec!(3.1415926535897932384626433833));

pub const HALF_PI: Decimal = _

Available on crate feature maths only.

A constant representing π/2 as 1.5707963267948966192313216916

§Examples

Basic usage:

assert_eq!(Decimal::HALF_PI, dec!(1.5707963267948966192313216916));

pub const QUARTER_PI: Decimal = _

Available on crate feature maths only.

A constant representing π/4 as 0.7853981633974483096156608458

§Examples

Basic usage:

assert_eq!(Decimal::QUARTER_PI, dec!(0.7853981633974483096156608458));

pub const TWO_PI: Decimal = _

Available on crate feature maths only.

A constant representing 2π as 6.2831853071795864769252867666

§Examples

Basic usage:

assert_eq!(Decimal::TWO_PI, dec!(6.2831853071795864769252867666));

pub const E: Decimal = _

Available on crate feature maths only.

A constant representing Euler’s number (e) as 2.7182818284590452353602874714

§Examples

Basic usage:

assert_eq!(Decimal::E, dec!(2.7182818284590452353602874714));

pub const E_INVERSE: Decimal = _

Available on crate feature maths only.

A constant representing the inverse of Euler’s number (1/e) as 0.3678794411714423215955237702

§Examples

Basic usage:

assert_eq!(Decimal::E_INVERSE, dec!(0.3678794411714423215955237702));

pub fn new(num: i64, scale: u32) -> Decimal

Returns a Decimal with a 64 bit m representation and corresponding e scale.

§Arguments

num - An i64 that represents the m portion of the decimal number
scale - A u32 representing the e portion of the decimal number.

§Panics

This function panics if scale is > 28.

§Example

let pi = Decimal::new(3141, 3);
assert_eq!(pi.to_string(), "3.141");

pub const fn try_new(num: i64, scale: u32) -> Result<Decimal>

Checked version of Decimal::new. Will return Err instead of panicking at run-time.

§Example

let max = Decimal::try_new(i64::MAX, u32::MAX);
assert!(max.is_err());

pub fn from_i128_with_scale(num: i128, scale: u32) -> Decimal

Creates a Decimal using a 128 bit signed m representation and corresponding e scale.

§Arguments

num - An i128 that represents the m portion of the decimal number
scale - A u32 representing the e portion of the decimal number.

§Panics

This function panics if scale is > 28 or if num exceeds the maximum supported 96 bits.

§Example

let pi = Decimal::from_i128_with_scale(3141i128, 3);
assert_eq!(pi.to_string(), "3.141");

pub const fn try_from_i128_with_scale(num: i128, scale: u32) -> Result<Decimal>

Checked version of Decimal::from_i128_with_scale. Will return Err instead of panicking at run-time.

§Example

let max = Decimal::try_from_i128_with_scale(i128::MAX, u32::MAX);
assert!(max.is_err());

pub const fn from_parts( lo: u32, mid: u32, hi: u32, negative: bool, scale: u32 ) -> Decimal

Returns a Decimal using the instances constituent parts.

§Arguments

lo - The low 32 bits of a 96-bit integer.
mid - The middle 32 bits of a 96-bit integer.
hi - The high 32 bits of a 96-bit integer.
negative - true to indicate a negative number.
scale - A power of 10 ranging from 0 to 28.

§Caution: Undefined behavior

While a scale greater than 28 can be passed in, it will be automatically capped by this function at the maximum precision. The library opts towards this functionality as opposed to a panic to ensure that the function can be treated as constant. This may lead to undefined behavior in downstream applications and should be treated with caution.

§Example

let pi = Decimal::from_parts(1102470952, 185874565, 1703060790, false, 28);
assert_eq!(pi.to_string(), "3.1415926535897932384626433832");

pub fn from_scientific(value: &str) -> Result<Decimal, Error>

Returns a Result which if successful contains the Decimal constitution of the scientific notation provided by value.

§Arguments

value - The scientific notation of the Decimal.

§Example

let value = Decimal::from_scientific("9.7e-7")?;
assert_eq!(value.to_string(), "0.00000097");

pub fn from_str_radix(str: &str, radix: u32) -> Result<Self, Error>

Converts a string slice in a given base to a decimal.

The string is expected to be an optional + sign followed by digits. Digits are a subset of these characters, depending on radix, and will return an error if outside the expected range:

0-9
a-z
A-Z

§Examples

Basic usage:

assert_eq!(Decimal::from_str_radix("A", 16)?.to_string(), "10");

pub fn from_str_exact(str: &str) -> Result<Self, Error>

Parses a string slice into a decimal. If the value underflows and cannot be represented with the given scale then this will return an error.

§Examples

Basic usage:

assert_eq!(Decimal::from_str_exact("0.001")?.to_string(), "0.001");
assert_eq!(Decimal::from_str_exact("0.00000_00000_00000_00000_00000_001")?.to_string(), "0.0000000000000000000000000001");
assert_eq!(Decimal::from_str_exact("0.00000_00000_00000_00000_00000_0001"), Err(Error::Underflow));

pub const fn scale(&self) -> u32

Returns the scale of the decimal number, otherwise known as e.

§Example

let num = Decimal::new(1234, 3);
assert_eq!(num.scale(), 3u32);

pub const fn mantissa(&self) -> i128

Returns the mantissa of the decimal number.

§Example

use rust_decimal_macros::dec;

let num = dec!(-1.2345678);
assert_eq!(num.mantissa(), -12345678i128);
assert_eq!(num.scale(), 7);

pub const fn is_zero(&self) -> bool

Returns true if this Decimal number is equivalent to zero.

§Example

let num = Decimal::ZERO;
assert!(num.is_zero());

pub fn is_integer(&self) -> bool

Returns true if this Decimal number has zero fractional part (is equal to an integer)

§Example

assert_eq!(dec!(5).is_integer(), true);
// Trailing zeros are also ignored
assert_eq!(dec!(5.0000).is_integer(), true);
// If there is a fractional part then it is not an integer
assert_eq!(dec!(5.1).is_integer(), false);

pub fn set_sign(&mut self, positive: bool)

👎Deprecated since 1.4.0: please use set_sign_positive instead

An optimized method for changing the sign of a decimal number.

§Arguments

positive: true if the resulting decimal should be positive.

§Example

let mut one = Decimal::ONE;
one.set_sign(false);
assert_eq!(one.to_string(), "-1");

pub fn set_sign_positive(&mut self, positive: bool)

An optimized method for changing the sign of a decimal number.

§Arguments

positive: true if the resulting decimal should be positive.

§Example

let mut one = Decimal::ONE;
one.set_sign_positive(false);
assert_eq!(one.to_string(), "-1");

pub fn set_sign_negative(&mut self, negative: bool)

An optimized method for changing the sign of a decimal number.

§Arguments

negative: true if the resulting decimal should be negative.

§Example

let mut one = Decimal::ONE;
one.set_sign_negative(true);
assert_eq!(one.to_string(), "-1");

pub fn set_scale(&mut self, scale: u32) -> Result<(), Error>

An optimized method for changing the scale of a decimal number.

§Arguments

scale: the new scale of the number

§Example

let mut one = Decimal::ONE;
one.set_scale(5)?;
assert_eq!(one.to_string(), "0.00001");

pub fn rescale(&mut self, scale: u32)

Modifies the Decimal towards the desired scale, attempting to do so without changing the underlying number itself.

Setting the scale to something less then the current Decimals scale will cause the newly created Decimal to perform rounding using the MidpointAwayFromZero strategy.

Scales greater than the maximum precision that can be represented by Decimal will be automatically rounded to either Decimal::MAX_PRECISION or the maximum precision that can be represented with the given mantissa.

§Arguments

scale: The desired scale to use for the new Decimal number.

§Example

use rust_decimal_macros::dec;

// Rescaling to a higher scale preserves the value
let mut number = dec!(1.123);
assert_eq!(number.scale(), 3);
number.rescale(6);
assert_eq!(number.to_string(), "1.123000");
assert_eq!(number.scale(), 6);

// Rescaling to a lower scale forces the number to be rounded
let mut number = dec!(1.45);
assert_eq!(number.scale(), 2);
number.rescale(1);
assert_eq!(number.to_string(), "1.5");
assert_eq!(number.scale(), 1);

// This function never fails. Consequently, if a scale is provided that is unable to be
// represented using the given mantissa, then the maximum possible scale is used.
let mut number = dec!(11.76470588235294);
assert_eq!(number.scale(), 14);
number.rescale(28);
// A scale of 28 cannot be represented given this mantissa, however it was able to represent
// a number with a scale of 27
assert_eq!(number.to_string(), "11.764705882352940000000000000");
assert_eq!(number.scale(), 27);

pub const fn serialize(&self) -> [u8; 16]

Returns a serialized version of the decimal number. The resulting byte array will have the following representation:

Bytes 1-4: flags
Bytes 5-8: lo portion of m
Bytes 9-12: mid portion of m
Bytes 13-16: high portion of m

pub fn deserialize(bytes: [u8; 16]) -> Decimal

Deserializes the given bytes into a decimal number. The deserialized byte representation must be 16 bytes and adhere to the following convention:

Bytes 1-4: flags
Bytes 5-8: lo portion of m
Bytes 9-12: mid portion of m
Bytes 13-16: high portion of m

pub fn is_negative(&self) -> bool

👎Deprecated since 0.6.3: please use is_sign_negative instead

Returns true if the decimal is negative.

pub fn is_positive(&self) -> bool

👎Deprecated since 0.6.3: please use is_sign_positive instead

Returns true if the decimal is positive.

pub const fn is_sign_negative(&self) -> bool

Returns true if the sign bit of the decimal is negative.

§Example

assert_eq!(true, Decimal::new(-1, 0).is_sign_negative());
assert_eq!(false, Decimal::new(1, 0).is_sign_negative());

pub const fn is_sign_positive(&self) -> bool

Returns true if the sign bit of the decimal is positive.

§Example

assert_eq!(false, Decimal::new(-1, 0).is_sign_positive());
assert_eq!(true, Decimal::new(1, 0).is_sign_positive());

pub const fn min_value() -> Decimal

👎Deprecated since 1.12.0: Use the associated constant Decimal::MIN

Returns the minimum possible number that Decimal can represent.

pub const fn max_value() -> Decimal

👎Deprecated since 1.12.0: Use the associated constant Decimal::MAX

Returns the maximum possible number that Decimal can represent.

pub fn trunc(&self) -> Decimal

Returns a new Decimal integral with no fractional portion. This is a true truncation whereby no rounding is performed.

§Example

let pi = dec!(3.141);
assert_eq!(pi.trunc(), dec!(3));

// Negative numbers are similarly truncated without rounding
let neg = dec!(-1.98765);
assert_eq!(neg.trunc(), Decimal::NEGATIVE_ONE);

pub fn trunc_with_scale(&self, scale: u32) -> Decimal

Returns a new Decimal with the fractional portion delimited by scale. This is a true truncation whereby no rounding is performed.

§Example

let pi = dec!(3.141592);
assert_eq!(pi.trunc_with_scale(2), dec!(3.14));

// Negative numbers are similarly truncated without rounding
let neg = dec!(-1.98765);
assert_eq!(neg.trunc_with_scale(1), dec!(-1.9));

pub fn fract(&self) -> Decimal

Returns a new Decimal representing the fractional portion of the number.

§Example

let pi = Decimal::new(3141, 3);
let fract = Decimal::new(141, 3);
// note that it returns a decimal
assert_eq!(pi.fract(), fract);

pub fn abs(&self) -> Decimal

Computes the absolute value of self.

§Example

let num = Decimal::new(-3141, 3);
assert_eq!(num.abs().to_string(), "3.141");

pub fn floor(&self) -> Decimal

Returns the largest integer less than or equal to a number.

§Example

let num = Decimal::new(3641, 3);
assert_eq!(num.floor().to_string(), "3");

pub fn ceil(&self) -> Decimal

Returns the smallest integer greater than or equal to a number.

§Example

let num = Decimal::new(3141, 3);
assert_eq!(num.ceil().to_string(), "4");
let num = Decimal::new(3, 0);
assert_eq!(num.ceil().to_string(), "3");

pub fn max(self, other: Decimal) -> Decimal

Returns the maximum of the two numbers.

let x = Decimal::new(1, 0);
let y = Decimal::new(2, 0);
assert_eq!(y, x.max(y));

pub fn min(self, other: Decimal) -> Decimal

Returns the minimum of the two numbers.

let x = Decimal::new(1, 0);
let y = Decimal::new(2, 0);
assert_eq!(x, x.min(y));

pub fn normalize(&self) -> Decimal

Strips any trailing zero’s from a Decimal and converts -0 to 0.

§Example

let number = Decimal::from_str("3.100")?;
assert_eq!(number.normalize().to_string(), "3.1");

pub fn normalize_assign(&mut self)

An in place version of normalize. Strips any trailing zero’s from a Decimal and converts -0 to 0.

§Example

let mut number = Decimal::from_str("3.100")?;
assert_eq!(number.to_string(), "3.100");
number.normalize_assign();
assert_eq!(number.to_string(), "3.1");

pub fn round(&self) -> Decimal

Returns a new Decimal number with no fractional portion (i.e. an integer). Rounding currently follows “Bankers Rounding” rules. e.g. 6.5 -> 6, 7.5 -> 8

§Example

// Demonstrating bankers rounding...
let number_down = Decimal::new(65, 1);
let number_up   = Decimal::new(75, 1);
assert_eq!(number_down.round().to_string(), "6");
assert_eq!(number_up.round().to_string(), "8");

pub fn round_dp_with_strategy( &self, dp: u32, strategy: RoundingStrategy ) -> Decimal

Returns a new Decimal number with the specified number of decimal points for fractional portion. Rounding is performed using the provided RoundingStrategy

§Arguments

dp: the number of decimal points to round to.
strategy: the RoundingStrategy to use.

§Example

let tax = dec!(3.4395);
assert_eq!(tax.round_dp_with_strategy(2, RoundingStrategy::MidpointAwayFromZero).to_string(), "3.44");

pub fn round_dp(&self, dp: u32) -> Decimal

Returns a new Decimal number with the specified number of decimal points for fractional portion. Rounding currently follows “Bankers Rounding” rules. e.g. 6.5 -> 6, 7.5 -> 8

§Arguments

dp: the number of decimal points to round to.

§Example

let pi = dec!(3.1415926535897932384626433832);
assert_eq!(pi.round_dp(2).to_string(), "3.14");

pub fn round_sf(&self, digits: u32) -> Option<Decimal>

Returns Some(Decimal) number rounded to the specified number of significant digits. If the resulting number is unable to be represented by the Decimal number then None will be returned. When the number of significant figures of the Decimal being rounded is greater than the requested number of significant digits then rounding will be performed using MidpointNearestEven strategy.

§Arguments

digits: the number of significant digits to round to.

§Remarks

A significant figure is determined using the following rules:

Non-zero digits are always significant.
Zeros between non-zero digits are always significant.
Leading zeros are never significant.
Trailing zeros are only significant if the number contains a decimal point.

§Example

use rust_decimal_macros::dec;

let value = dec!(305.459);
assert_eq!(value.round_sf(0), Some(dec!(0)));
assert_eq!(value.round_sf(1), Some(dec!(300)));
assert_eq!(value.round_sf(2), Some(dec!(310)));
assert_eq!(value.round_sf(3), Some(dec!(305)));
assert_eq!(value.round_sf(4), Some(dec!(305.5)));
assert_eq!(value.round_sf(5), Some(dec!(305.46)));
assert_eq!(value.round_sf(6), Some(dec!(305.459)));
assert_eq!(value.round_sf(7), Some(dec!(305.4590)));
assert_eq!(Decimal::MAX.round_sf(1), None);

let value = dec!(0.012301);
assert_eq!(value.round_sf(3), Some(dec!(0.0123)));

pub fn round_sf_with_strategy( &self, digits: u32, strategy: RoundingStrategy ) -> Option<Decimal>

Returns Some(Decimal) number rounded to the specified number of significant digits. If the resulting number is unable to be represented by the Decimal number then None will be returned. When the number of significant figures of the Decimal being rounded is greater than the requested number of significant digits then rounding will be performed using the provided RoundingStrategy.

§Arguments

digits: the number of significant digits to round to.
strategy: if required, the rounding strategy to use.

§Remarks

A significant figure is determined using the following rules:

Non-zero digits are always significant.
Zeros between non-zero digits are always significant.
Leading zeros are never significant.
Trailing zeros are only significant if the number contains a decimal point.

§Example

use rust_decimal_macros::dec;

let value = dec!(305.459);
assert_eq!(value.round_sf_with_strategy(0, RoundingStrategy::ToZero), Some(dec!(0)));
assert_eq!(value.round_sf_with_strategy(1, RoundingStrategy::ToZero), Some(dec!(300)));
assert_eq!(value.round_sf_with_strategy(2, RoundingStrategy::ToZero), Some(dec!(300)));
assert_eq!(value.round_sf_with_strategy(3, RoundingStrategy::ToZero), Some(dec!(305)));
assert_eq!(value.round_sf_with_strategy(4, RoundingStrategy::ToZero), Some(dec!(305.4)));
assert_eq!(value.round_sf_with_strategy(5, RoundingStrategy::ToZero), Some(dec!(305.45)));
assert_eq!(value.round_sf_with_strategy(6, RoundingStrategy::ToZero), Some(dec!(305.459)));
assert_eq!(value.round_sf_with_strategy(7, RoundingStrategy::ToZero), Some(dec!(305.4590)));
assert_eq!(Decimal::MAX.round_sf_with_strategy(1, RoundingStrategy::ToZero), Some(dec!(70000000000000000000000000000)));

let value = dec!(0.012301);
assert_eq!(value.round_sf_with_strategy(3, RoundingStrategy::AwayFromZero), Some(dec!(0.0124)));

pub const fn unpack(&self) -> UnpackedDecimal

Convert Decimal to an internal representation of the underlying struct. This is useful for debugging the internal state of the object.

§Important Disclaimer

This is primarily intended for library maintainers. The internal representation of a Decimal is considered “unstable” for public use.

§Example

use rust_decimal_macros::dec;

let pi = dec!(3.1415926535897932384626433832);
assert_eq!(format!("{:?}", pi), "3.1415926535897932384626433832");
assert_eq!(format!("{:?}", pi.unpack()), "UnpackedDecimal { \
    negative: false, scale: 28, hi: 1703060790, mid: 185874565, lo: 1102470952 \
}");

pub fn from_f32_retain(n: f32) -> Option<Self>

Parses a 32-bit float into a Decimal number whilst retaining any non-guaranteed precision.

Typically when a float is parsed in Rust Decimal, any excess bits (after ~7.22 decimal points for f32 as per IEEE-754) are removed due to any digits following this are considered an approximation at best. This function bypasses this additional step and retains these excess bits.

§Example

// Usually floats are parsed leveraging float guarantees. i.e. 0.1_f32 => 0.1
assert_eq!("0.1", Decimal::from_f32(0.1_f32).unwrap().to_string());

// Sometimes, we may want to represent the approximation exactly.
assert_eq!("0.100000001490116119384765625", Decimal::from_f32_retain(0.1_f32).unwrap().to_string());

pub fn from_f64_retain(n: f64) -> Option<Self>

Parses a 64-bit float into a Decimal number whilst retaining any non-guaranteed precision.

Typically when a float is parsed in Rust Decimal, any excess bits (after ~15.95 decimal points for f64 as per IEEE-754) are removed due to any digits following this are considered an approximation at best. This function bypasses this additional step and retains these excess bits.

§Example

// Usually floats are parsed leveraging float guarantees. i.e. 0.1_f64 => 0.1
assert_eq!("0.1", Decimal::from_f64(0.1_f64).unwrap().to_string());

// Sometimes, we may want to represent the approximation exactly.
assert_eq!("0.1000000000000000055511151231", Decimal::from_f64_retain(0.1_f64).unwrap().to_string());

impl Decimal

pub fn checked_add(self, other: Decimal) -> Option<Decimal>

Checked addition. Computes self + other, returning None if overflow occurred.

pub fn saturating_add(self, other: Decimal) -> Decimal

Saturating addition. Computes self + other, saturating at the relevant upper or lower boundary.

pub fn checked_mul(self, other: Decimal) -> Option<Decimal>

Checked multiplication. Computes self * other, returning None if overflow occurred.

pub fn saturating_mul(self, other: Decimal) -> Decimal

Saturating multiplication. Computes self * other, saturating at the relevant upper or lower boundary.

pub fn checked_sub(self, other: Decimal) -> Option<Decimal>

Checked subtraction. Computes self - other, returning None if overflow occurred.

pub fn saturating_sub(self, other: Decimal) -> Decimal

Saturating subtraction. Computes self - other, saturating at the relevant upper or lower boundary.

pub fn checked_div(self, other: Decimal) -> Option<Decimal>

Checked division. Computes self / other, returning None if overflow occurred.

pub fn checked_rem(self, other: Decimal) -> Option<Decimal>

Checked remainder. Computes self % other, returning None if overflow occurred.

Trait Implementations§

impl<'a, 'b> Add<&'b Decimal> for &'a Decimal

type Output = Decimal

The resulting type after applying the + operator.

fn add(self, other: &Decimal) -> Decimal

Performs the + operation. Read more

impl<'a> Add<&'a Decimal> for Decimal

type Output = Decimal

The resulting type after applying the + operator.

fn add(self, other: &Decimal) -> Decimal

Performs the + operation. Read more

impl<'a> Add<Decimal> for &'a Decimal

type Output = Decimal

The resulting type after applying the + operator.

fn add(self, other: Decimal) -> Decimal

Performs the + operation. Read more

impl Add for Decimal

type Output = Decimal

The resulting type after applying the + operator.

fn add(self, other: Decimal) -> Decimal

Performs the + operation. Read more

impl<'a> AddAssign<&'a Decimal> for &'a mut Decimal

fn add_assign(&mut self, other: &'a Decimal)

Performs the += operation. Read more

impl<'a> AddAssign<&'a Decimal> for Decimal

fn add_assign(&mut self, other: &'a Decimal)

Performs the += operation. Read more

impl<'a> AddAssign<Decimal> for &'a mut Decimal

fn add_assign(&mut self, other: Decimal)

Performs the += operation. Read more

impl AddAssign for Decimal

fn add_assign(&mut self, other: Decimal)

Performs the += operation. Read more

impl Arbitrary<'_> for Decimal

Available on crate feature rust-fuzz only.

fn arbitrary(u: &mut Unstructured<'_>) -> ArbitraryResult<Self>

Generate an arbitrary value of Self from the given unstructured data. Read more

fn arbitrary_take_rest(u: Unstructured<'a>) -> Result<Self, Error>

Generate an arbitrary value of Self from the entirety of the given unstructured data. Read more

fn size_hint(depth: usize) -> (usize, Option<usize>)

Get a size hint for how many bytes out of an Unstructured this type needs to construct itself. Read more

impl Arbitrary for Decimal

Available on crate feature proptest only.

type Parameters = ()

The type of parameters that arbitrary_with accepts for configuration of the generated Strategy. Parameters must implement Default.

type Strategy = FilterMap<<(u32, u32, u32, bool, u8) as Arbitrary>::Strategy, fn(_: (u32, u32, u32, bool, u8)) -> Option<Decimal>>

The type of Strategy used to generate values of type Self.

fn arbitrary_with(_parameters: Self::Parameters) -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). The strategy is passed the arguments given in args. Read more

fn arbitrary() -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). Read more

impl Archive for Decimal
where u32: Archive,

type Archived = ArchivedDecimal

The archived representation of this type. Read more

type Resolver = DecimalResolver

The resolver for this type. It must contain all the additional information from serializing needed to make the archived type from the normal type.

unsafe fn resolve( &self, pos: usize, resolver: Self::Resolver, out: *mut Self::Archived )

Creates the archived version of this value at the given position and writes it to the given output. Read more

impl<'expr> AsExpression<Nullable<Numeric>> for &'expr Decimal

type Expression = Bound<Nullable<Numeric>, &'expr Decimal>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl AsExpression<Nullable<Numeric>> for Decimal

type Expression = Bound<Nullable<Numeric>, Decimal>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl<'expr> AsExpression<Numeric> for &'expr Decimal

type Expression = Bound<Numeric, &'expr Decimal>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl AsExpression<Numeric> for Decimal

type Expression = Bound<Numeric, Decimal>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl BorshDeserialize for Decimal

fn deserialize_reader<R: Read>(reader: &mut R) -> Result<Self, Error>

fn deserialize(buf: &mut &[u8]) -> Result<Self, Error>

Deserializes this instance from a given slice of bytes. Updates the buffer to point at the remaining bytes.

fn try_from_slice(v: &[u8]) -> Result<Self, Error>

Deserialize this instance from a slice of bytes.

fn try_from_reader<R>(reader: &mut R) -> Result<Self, Error>
where R: Read,

impl BorshSchema for Decimal

fn declaration() -> Declaration

Get the name of the type without brackets.

fn add_definitions_recursively( definitions: &mut BTreeMap<Declaration, Definition> )

Recursively, using DFS, add type definitions required for this type. Type definition partially explains how to serialize/deserialize a type.

impl BorshSerialize for Decimal

fn serialize<W: Write>(&self, writer: &mut W) -> Result<(), Error>

impl CheckedAdd for Decimal

fn checked_add(&self, v: &Decimal) -> Option<Decimal>

Adds two numbers, checking for overflow. If overflow happens, None is returned.

impl CheckedDiv for Decimal

fn checked_div(&self, v: &Decimal) -> Option<Decimal>

Divides two numbers, checking for underflow, overflow and division by zero. If any of that happens, None is returned.

impl CheckedMul for Decimal

fn checked_mul(&self, v: &Decimal) -> Option<Decimal>

Multiplies two numbers, checking for underflow or overflow. If underflow or overflow happens, None is returned.

impl CheckedRem for Decimal

fn checked_rem(&self, v: &Decimal) -> Option<Decimal>

Finds the remainder of dividing two numbers, checking for underflow, overflow and division by zero. If any of that happens, None is returned. Read more

impl CheckedSub for Decimal

fn checked_sub(&self, v: &Decimal) -> Option<Decimal>

Subtracts two numbers, checking for underflow. If underflow happens, None is returned.

impl Clone for Decimal

fn clone(&self) -> Decimal

Returns a copy of the value. Read more

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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

impl Debug for Decimal

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more

impl Default for Decimal

fn default() -> Self

Returns the default value for a Decimal (equivalent to Decimal::ZERO). Read more

impl<'de> Deserialize<'de> for Decimal

Available on crate feature serde and (crate features serde-with-str or serde-with-float or serde-with-arbitrary-precision) and crate feature serde-str and crate feature serde-float only.

fn deserialize<D>(deserializer: D) -> Result<Decimal, D::Error>
where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more

impl<D: Fallible + ?Sized> Deserialize<Decimal, D> for Archived<Decimal>
where u32: Archive, Archived<u32>: Deserialize<u32, __D>,

fn deserialize(&self, deserializer: &mut D) -> Result<Decimal, D::Error>

Deserializes using the given deserializer

impl Display for Decimal

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more

impl Distribution<Decimal> for Standard

Available on crate feature rand only.

fn sample<R>(&self, rng: &mut R) -> Decimal
where R: Rng + ?Sized,

Generate a random value of T, using rng as the source of randomness.

fn sample_iter<R>(self, rng: R) -> DistIter<Self, R, T>
where R: Rng, Self: Sized,

Create an iterator that generates random values of T, using rng as the source of randomness. Read more

fn map<F, S>(self, func: F) -> DistMap<Self, F, T, S>
where F: Fn(T) -> S, Self: Sized,

Create a distribution of values of ‘S’ by mapping the output of Self through the closure F Read more

impl<'a, 'b> Div<&'b Decimal> for &'a Decimal

type Output = Decimal

The resulting type after applying the / operator.

fn div(self, other: &Decimal) -> Decimal

Performs the / operation. Read more

impl<'a> Div<&'a Decimal> for Decimal

type Output = Decimal

The resulting type after applying the / operator.

fn div(self, other: &Decimal) -> Decimal

Performs the / operation. Read more

impl<'a> Div<Decimal> for &'a Decimal

type Output = Decimal

The resulting type after applying the / operator.

fn div(self, other: Decimal) -> Decimal

Performs the / operation. Read more

impl Div for Decimal

type Output = Decimal

The resulting type after applying the / operator.

fn div(self, other: Decimal) -> Decimal

Performs the / operation. Read more

impl<'a> DivAssign<&'a Decimal> for &'a mut Decimal

fn div_assign(&mut self, other: &'a Decimal)

Performs the /= operation. Read more

impl<'a> DivAssign<&'a Decimal> for Decimal

fn div_assign(&mut self, other: &'a Decimal)

Performs the /= operation. Read more

impl<'a> DivAssign<Decimal> for &'a mut Decimal

fn div_assign(&mut self, other: Decimal)

Performs the /= operation. Read more

impl DivAssign for Decimal

fn div_assign(&mut self, other: Decimal)

Performs the /= operation. Read more

impl<'a> From<&'a Decimal> for PgNumeric

Available on (crate features db-diesel1-postgres or db-diesel2-postgres) and (crate features db-tokio-postgres or db-postgres or db-diesel1-postgres or db-diesel2-postgres) only.

fn from(decimal: &'a Decimal) -> Self

Converts to this type from the input type.

impl From<Decimal> for PgNumeric

Available on (crate features db-diesel1-postgres or db-diesel2-postgres) and (crate features db-tokio-postgres or db-postgres or db-diesel1-postgres or db-diesel2-postgres) only.

fn from(decimal: Decimal) -> Self

Converts to this type from the input type.

impl From<i128> for Decimal

Conversion to Decimal.

fn from(t: i128) -> Self

Converts to this type from the input type.

impl From<i16> for Decimal

Conversion to Decimal.

fn from(t: i16) -> Self

Converts to this type from the input type.

impl From<i32> for Decimal

Conversion to Decimal.

fn from(t: i32) -> Self

Converts to this type from the input type.

impl From<i64> for Decimal

Conversion to Decimal.

fn from(t: i64) -> Self

Converts to this type from the input type.

impl From<i8> for Decimal

Conversion to Decimal.

fn from(t: i8) -> Self

Converts to this type from the input type.

impl From<isize> for Decimal

Conversion to Decimal.

fn from(t: isize) -> Self

Converts to this type from the input type.

impl From<u128> for Decimal

Conversion to Decimal.

fn from(t: u128) -> Self

Converts to this type from the input type.

impl From<u16> for Decimal

Conversion to Decimal.

fn from(t: u16) -> Self

Converts to this type from the input type.

impl From<u32> for Decimal

Conversion to Decimal.

fn from(t: u32) -> Self

Converts to this type from the input type.

impl From<u64> for Decimal

Conversion to Decimal.

fn from(t: u64) -> Self

Converts to this type from the input type.

impl From<u8> for Decimal

Conversion to Decimal.

fn from(t: u8) -> Self

Converts to this type from the input type.

impl From<usize> for Decimal

Conversion to Decimal.

fn from(t: usize) -> Self

Converts to this type from the input type.

impl<'v> FromFormField<'v> for Decimal

Available on crate feature rocket-traits only.

fn default() -> Option<Self>

Returns a default value, if any exists, to be used during lenient parsing when the form field is missing. Read more

fn from_value(field: ValueField<'v>) -> Result<'v, Self>

Parse a value of T from a form value field. Read more

fn from_data<'life0, 'async_trait>( field: DataField<'v, 'life0> ) -> Pin<Box<dyn Future<Output = Result<Self, Errors<'v>>> + Send + 'async_trait>>
where 'v: 'async_trait, 'life0: 'async_trait, Self: 'async_trait,

Parse a value of T from a form data field. Read more

impl FromPrimitive for Decimal

fn from_i32(n: i32) -> Option<Decimal>

Converts an i32 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_i64(n: i64) -> Option<Decimal>

Converts an i64 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_i128(n: i128) -> Option<Decimal>

Converts an i128 to return an optional value of this type. If the value cannot be represented by this type, then None is returned. Read more

fn from_u32(n: u32) -> Option<Decimal>

Converts an u32 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_u64(n: u64) -> Option<Decimal>

Converts an u64 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_u128(n: u128) -> Option<Decimal>

Converts an u128 to return an optional value of this type. If the value cannot be represented by this type, then None is returned. Read more

fn from_f32(n: f32) -> Option<Decimal>

Converts a f32 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_f64(n: f64) -> Option<Decimal>

Converts a f64 to return an optional value of this type. If the value cannot be represented by this type, then None is returned. Read more

fn from_isize(n: isize) -> Option<Self>

Converts an isize to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_i8(n: i8) -> Option<Self>

Converts an i8 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_i16(n: i16) -> Option<Self>

Converts an i16 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_usize(n: usize) -> Option<Self>

Converts a usize to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_u8(n: u8) -> Option<Self>

Converts an u8 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_u16(n: u16) -> Option<Self>

Converts an u16 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

impl<'a> FromSql<'a> for Decimal

Available on (crate features db-postgres or db-tokio-postgres) and (crate features db-tokio-postgres or db-postgres or db-diesel1-postgres or db-diesel2-postgres) only.

fn from_sql( _: &Type, raw: &[u8] ) -> Result<Decimal, Box<dyn Error + Sync + Send + 'static>>

Creates a new value of this type from a buffer of data of the specified Postgres Type in its binary format. Read more

fn accepts(ty: &Type) -> bool

Determines if a value of this type can be created from the specified Postgres Type.

fn from_sql_null(ty: &Type) -> Result<Self, Box<dyn Error + Sync + Send>>

Creates a new value of this type from a NULL SQL value. Read more

fn from_sql_nullable( ty: &Type, raw: Option<&'a [u8]> ) -> Result<Self, Box<dyn Error + Sync + Send>>

A convenience function that delegates to from_sql and from_sql_null depending on the value of raw.

impl FromSql<Numeric, Mysql> for Decimal

Available on (crate features db-diesel1-mysql or db-diesel2-mysql) and crate feature diesel2 only.

fn from_sql(numeric: MysqlValue<'_>) -> Result<Self>

See the trait documentation.

fn from_nullable_sql( bytes: Option<<DB as Backend>::RawValue<'_>> ) -> Result<Self, Box<dyn Error + Sync + Send>>

A specialized variant of from_sql for handling null values. Read more

impl FromSql<Numeric, Pg> for Decimal

Available on (crate features db-diesel1-postgres or db-diesel2-postgres) and (crate features db-tokio-postgres or db-postgres or db-diesel1-postgres or db-diesel2-postgres) and crate feature diesel2 only.

fn from_sql(numeric: PgValue<'_>) -> Result<Self>

See the trait documentation.

fn from_nullable_sql( bytes: Option<<DB as Backend>::RawValue<'_>> ) -> Result<Self, Box<dyn Error + Sync + Send>>

A specialized variant of from_sql for handling null values. Read more

impl FromStr for Decimal

type Err = Error

The associated error which can be returned from parsing.

fn from_str(value: &str) -> Result<Decimal, Self::Err>

Parses a string s to return a value of this type. Read more

impl Hash for Decimal

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher. Read more

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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more

impl Inv for Decimal

type Output = Decimal

The result after applying the operator.

fn inv(self) -> Self

Returns the multiplicative inverse of self. Read more

impl LowerExp for Decimal

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl MathematicalOps for Decimal

Available on crate feature maths only.

fn exp(&self) -> Decimal

The estimated exponential function, e^x. Stops calculating when it is within tolerance of roughly 0.0000002.

fn checked_exp(&self) -> Option<Decimal>

The estimated exponential function, e^x. Stops calculating when it is within tolerance of roughly 0.0000002. Returns None on overflow.

fn exp_with_tolerance(&self, tolerance: Decimal) -> Decimal

The estimated exponential function, e^x using the tolerance provided as a hint as to when to stop calculating. A larger tolerance will cause the number to stop calculating sooner at the potential cost of a slightly less accurate result.

fn checked_exp_with_tolerance(&self, tolerance: Decimal) -> Option<Decimal>

The estimated exponential function, e^x using the tolerance provided as a hint as to when to stop calculating. A larger tolerance will cause the number to stop calculating sooner at the potential cost of a slightly less accurate result. Returns None on overflow.

fn powi(&self, exp: i64) -> Decimal

Raise self to the given integer exponent: x^y

fn checked_powi(&self, exp: i64) -> Option<Decimal>

Raise self to the given integer exponent x^y returning None on overflow.

fn powu(&self, exp: u64) -> Decimal

Raise self to the given unsigned integer exponent: x^y

fn checked_powu(&self, exp: u64) -> Option<Decimal>

Raise self to the given unsigned integer exponent x^y returning None on overflow.

fn powf(&self, exp: f64) -> Decimal

Raise self to the given floating point exponent: x^y

fn checked_powf(&self, exp: f64) -> Option<Decimal>

Raise self to the given floating point exponent x^y returning None on overflow.

fn powd(&self, exp: Decimal) -> Decimal

Raise self to the given Decimal exponent: x^y. If exp is not whole then the approximation e^y*ln(x) is used.

fn checked_powd(&self, exp: Decimal) -> Option<Decimal>

Raise self to the given Decimal exponent x^y returning None on overflow. If exp is not whole then the approximation e^y*ln(x) is used.

fn sqrt(&self) -> Option<Decimal>

The square root of a Decimal. Uses a standard Babylonian method.

fn ln(&self) -> Decimal

Calculates the natural logarithm for a Decimal calculated using Taylor’s series.

fn checked_ln(&self) -> Option<Decimal>

Calculates the checked natural logarithm for a Decimal calculated using Taylor’s series. Returns None for negative numbers or zero.

fn log10(&self) -> Decimal

Calculates the base 10 logarithm of a specified Decimal number.

fn checked_log10(&self) -> Option<Decimal>

Calculates the checked base 10 logarithm of a specified Decimal number. Returns None for negative numbers or zero.

fn erf(&self) -> Decimal

Abramowitz Approximation of Error Function from wikipedia

fn norm_cdf(&self) -> Decimal

The Cumulative distribution function for a Normal distribution

fn norm_pdf(&self) -> Decimal

The Probability density function for a Normal distribution.

fn checked_norm_pdf(&self) -> Option<Decimal>

The Probability density function for a Normal distribution returning None on overflow.

fn sin(&self) -> Decimal

Computes the sine of a number (in radians). Panics upon overflow.

fn checked_sin(&self) -> Option<Decimal>

Computes the checked sine of a number (in radians).

fn cos(&self) -> Decimal

Computes the cosine of a number (in radians). Panics upon overflow.

fn checked_cos(&self) -> Option<Decimal>

Computes the checked cosine of a number (in radians).

fn tan(&self) -> Decimal

Computes the tangent of a number (in radians). Panics upon overflow or upon approaching a limit.

fn checked_tan(&self) -> Option<Decimal>

Computes the checked tangent of a number (in radians). Returns None on limit.

impl<'a, 'b> Mul<&'b Decimal> for &'a Decimal

type Output = Decimal

The resulting type after applying the * operator.

fn mul(self, other: &Decimal) -> Decimal

Performs the * operation. Read more

impl<'a> Mul<&'a Decimal> for Decimal

type Output = Decimal

The resulting type after applying the * operator.

fn mul(self, other: &Decimal) -> Decimal

Performs the * operation. Read more

impl<'a> Mul<Decimal> for &'a Decimal

type Output = Decimal

The resulting type after applying the * operator.

fn mul(self, other: Decimal) -> Decimal

Performs the * operation. Read more

impl Mul for Decimal

type Output = Decimal

The resulting type after applying the * operator.

fn mul(self, other: Decimal) -> Decimal

Performs the * operation. Read more

impl<'a> MulAssign<&'a Decimal> for &'a mut Decimal

fn mul_assign(&mut self, other: &'a Decimal)

Performs the *= operation. Read more

impl<'a> MulAssign<&'a Decimal> for Decimal

fn mul_assign(&mut self, other: &'a Decimal)

Performs the *= operation. Read more

impl<'a> MulAssign<Decimal> for &'a mut Decimal

fn mul_assign(&mut self, other: Decimal)

Performs the *= operation. Read more

impl MulAssign for Decimal

fn mul_assign(&mut self, other: Decimal)

Performs the *= operation. Read more

impl<'a> Neg for &'a Decimal

type Output = Decimal

The resulting type after applying the - operator.

fn neg(self) -> Decimal

Performs the unary - operation. Read more

impl Neg for Decimal

type Output = Decimal

The resulting type after applying the - operator.

fn neg(self) -> Decimal

Performs the unary - operation. Read more

impl Num for Decimal

type FromStrRadixErr = Error

fn from_str_radix(str: &str, radix: u32) -> Result<Self, Self::FromStrRadixErr>

Convert from a string and radix (typically 2..=36). Read more

impl One for Decimal

fn one() -> Decimal

Returns the multiplicative identity element of Self, 1. Read more

fn set_one(&mut self)

Sets self to the multiplicative identity element of Self, 1.

fn is_one(&self) -> bool
where Self: PartialEq,

Returns true if self is equal to the multiplicative identity. Read more

impl Ord for Decimal

fn cmp(&self, other: &Decimal) -> Ordering

This method returns an Ordering between self and other. Read more

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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more

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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more

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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more

impl PartialEq for Decimal

fn eq(&self, other: &Decimal) -> bool

This method tests for self and other values to be equal, and is used by ==.

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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Decimal

fn partial_cmp(&self, other: &Decimal) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more

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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more

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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more

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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

impl Pow<Decimal> for Decimal

Available on crate feature maths only.

type Output = Decimal

The result after applying the operator.

fn pow(self, rhs: Decimal) -> Self::Output

Returns self to the power rhs. Read more

impl Pow<f64> for Decimal

Available on crate feature maths only.

type Output = Decimal

The result after applying the operator.

fn pow(self, rhs: f64) -> Self::Output

Returns self to the power rhs. Read more

impl Pow<i64> for Decimal

Available on crate feature maths only.

type Output = Decimal

The result after applying the operator.

fn pow(self, rhs: i64) -> Self::Output

Returns self to the power rhs. Read more

impl Pow<u64> for Decimal

Available on crate feature maths only.

type Output = Decimal

The result after applying the operator.

fn pow(self, rhs: u64) -> Self::Output

Returns self to the power rhs. Read more

impl<'a> Product<&'a Decimal> for Decimal

fn product<I: Iterator<Item = &'a Decimal>>(iter: I) -> Self

Panics if out-of-bounds

impl Product for Decimal

fn product<I: Iterator<Item = Decimal>>(iter: I) -> Self

Panics if out-of-bounds

impl<ST, DB> Queryable<ST, DB> for Decimal
where DB: Backend, ST: SingleValue, Self: FromSql<ST, DB>,

type Row = Decimal

The Rust type you’d like to map from. Read more

fn build(row: Self::Row) -> Result<Self>

Construct an instance of this type

impl<'a, 'b> Rem<&'b Decimal> for &'a Decimal

type Output = Decimal

The resulting type after applying the % operator.

fn rem(self, other: &Decimal) -> Decimal

Performs the % operation. Read more

impl<'a> Rem<&'a Decimal> for Decimal

type Output = Decimal

The resulting type after applying the % operator.

fn rem(self, other: &Decimal) -> Decimal

Performs the % operation. Read more

impl<'a> Rem<Decimal> for &'a Decimal

type Output = Decimal

The resulting type after applying the % operator.

fn rem(self, other: Decimal) -> Decimal

Performs the % operation. Read more

impl Rem for Decimal

type Output = Decimal

The resulting type after applying the % operator.

fn rem(self, other: Decimal) -> Decimal

Performs the % operation. Read more

impl<'a> RemAssign<&'a Decimal> for &'a mut Decimal

fn rem_assign(&mut self, other: &'a Decimal)

Performs the %= operation. Read more

impl<'a> RemAssign<&'a Decimal> for Decimal

fn rem_assign(&mut self, other: &'a Decimal)

Performs the %= operation. Read more

impl<'a> RemAssign<Decimal> for &'a mut Decimal

fn rem_assign(&mut self, other: Decimal)

Performs the %= operation. Read more

impl RemAssign for Decimal

fn rem_assign(&mut self, other: Decimal)

Performs the %= operation. Read more

impl SampleUniform for Decimal

Available on crate feature rand only.

type Sampler = DecimalSampler

The UniformSampler implementation supporting type X.

impl<S: Fallible + ?Sized> Serialize<S> for Decimal
where u32: Serialize<__S>,

fn serialize(&self, serializer: &mut S) -> Result<Self::Resolver, S::Error>

Writes the dependencies for the object and returns a resolver that can create the archived type.

impl Serialize for Decimal

Available on crate feature serde and (crate features serde-with-str or serde-with-float or serde-with-arbitrary-precision) and crate feature serde-float and crate feature serde-arbitrary-precision only.

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where S: Serializer,

Serialize this value into the given Serde serializer. Read more

impl Signed for Decimal

fn abs(&self) -> Self

Computes the absolute value. Read more

fn abs_sub(&self, other: &Self) -> Self

The positive difference of two numbers. Read more

fn signum(&self) -> Self

Returns the sign of the number. Read more

fn is_positive(&self) -> bool

Returns true if the number is positive and false if the number is zero or negative.

fn is_negative(&self) -> bool

Returns true if the number is negative and false if the number is zero or positive.

impl<'a, 'b> Sub<&'b Decimal> for &'a Decimal

type Output = Decimal

The resulting type after applying the - operator.

fn sub(self, other: &Decimal) -> Decimal

Performs the - operation. Read more

impl<'a> Sub<&'a Decimal> for Decimal

type Output = Decimal

The resulting type after applying the - operator.

fn sub(self, other: &Decimal) -> Decimal

Performs the - operation. Read more

impl<'a> Sub<Decimal> for &'a Decimal

type Output = Decimal

The resulting type after applying the - operator.

fn sub(self, other: Decimal) -> Decimal

Performs the - operation. Read more

impl Sub for Decimal

type Output = Decimal

The resulting type after applying the - operator.

fn sub(self, other: Decimal) -> Decimal

Performs the - operation. Read more

impl<'a> SubAssign<&'a Decimal> for &'a mut Decimal

fn sub_assign(&mut self, other: &'a Decimal)

Performs the -= operation. Read more

impl<'a> SubAssign<&'a Decimal> for Decimal

fn sub_assign(&mut self, other: &'a Decimal)

Performs the -= operation. Read more

impl<'a> SubAssign<Decimal> for &'a mut Decimal

fn sub_assign(&mut self, other: Decimal)

Performs the -= operation. Read more

impl SubAssign for Decimal

fn sub_assign(&mut self, other: Decimal)

Performs the -= operation. Read more

impl<'a> Sum<&'a Decimal> for Decimal

fn sum<I: Iterator<Item = &'a Decimal>>(iter: I) -> Self

Method which takes an iterator and generates Self from the elements by “summing up” the items.

impl Sum for Decimal

fn sum<I: Iterator<Item = Decimal>>(iter: I) -> Self

Method which takes an iterator and generates Self from the elements by “summing up” the items.

impl ToPrimitive for Decimal

fn to_i64(&self) -> Option<i64>

Converts the value of self to an i64. If the value cannot be represented by an i64, then None is returned.

fn to_i128(&self) -> Option<i128>

Converts the value of self to an i128. If the value cannot be represented by an i128 (i64 under the default implementation), then None is returned. Read more

fn to_u64(&self) -> Option<u64>

Converts the value of self to a u64. If the value cannot be represented by a u64, then None is returned.

fn to_u128(&self) -> Option<u128>

Converts the value of self to a u128. If the value cannot be represented by a u128 (u64 under the default implementation), then None is returned. Read more

fn to_f64(&self) -> Option<f64>

Converts the value of self to an f64. Overflows may map to positive or negative inifinity, otherwise None is returned if the value cannot be represented by an f64. Read more

fn to_isize(&self) -> Option<isize>

Converts the value of self to an isize. If the value cannot be represented by an isize, then None is returned.

fn to_i8(&self) -> Option<i8>

Converts the value of self to an i8. If the value cannot be represented by an i8, then None is returned.

fn to_i16(&self) -> Option<i16>

Converts the value of self to an i16. If the value cannot be represented by an i16, then None is returned.

fn to_i32(&self) -> Option<i32>

Converts the value of self to an i32. If the value cannot be represented by an i32, then None is returned.

fn to_usize(&self) -> Option<usize>

Converts the value of self to a usize. If the value cannot be represented by a usize, then None is returned.

fn to_u8(&self) -> Option<u8>

Converts the value of self to a u8. If the value cannot be represented by a u8, then None is returned.

fn to_u16(&self) -> Option<u16>

Converts the value of self to a u16. If the value cannot be represented by a u16, then None is returned.

fn to_u32(&self) -> Option<u32>

Converts the value of self to a u32. If the value cannot be represented by a u32, then None is returned.

fn to_f32(&self) -> Option<f32>

Converts the value of self to an f32. Overflows may map to positive or negative inifinity, otherwise None is returned if the value cannot be represented by an f32.

impl<DB> ToSql<Nullable<Numeric>, DB> for Decimal
where DB: Backend, Self: ToSql<Numeric, DB>,

fn to_sql<'b>(&'b self, out: &mut Output<'__b, '_, __DB>) -> Result

See the trait documentation.

impl ToSql<Numeric, Mysql> for Decimal

Available on (crate features db-diesel1-mysql or db-diesel2-mysql) and crate feature diesel2 only.

fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, Mysql>) -> Result

See the trait documentation.

impl ToSql<Numeric, Pg> for Decimal

Available on (crate features db-diesel1-postgres or db-diesel2-postgres) and (crate features db-tokio-postgres or db-postgres or db-diesel1-postgres or db-diesel2-postgres) and crate feature diesel2 only.

fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, Pg>) -> Result

See the trait documentation.

impl ToSql for Decimal

Available on (crate features db-postgres or db-tokio-postgres) and (crate features db-tokio-postgres or db-postgres or db-diesel1-postgres or db-diesel2-postgres) only.

fn to_sql( &self, _: &Type, out: &mut BytesMut ) -> Result<IsNull, Box<dyn Error + Sync + Send + 'static>>

Converts the value of self into the binary format of the specified Postgres Type, appending it to out. Read more

fn accepts(ty: &Type) -> bool

Determines if a value of this type can be converted to the specified Postgres Type.

fn to_sql_checked( &self, ty: &Type, out: &mut BytesMut ) -> Result<IsNull, Box<dyn Error + Sync + Send>>

An adaptor method used internally by Rust-Postgres. Read more

fn encode_format(&self, _ty: &Type) -> Format

Specify the encode format

impl<'a> TryFrom<&'a PgNumeric> for Decimal

Available on (crate features db-diesel1-postgres or db-diesel2-postgres) and (crate features db-tokio-postgres or db-postgres or db-diesel1-postgres or db-diesel2-postgres) only.

type Error = Box<dyn Error + Sync + Send>

The type returned in the event of a conversion error.

fn try_from(numeric: &'a PgNumeric) -> Result<Self>

Performs the conversion.

impl TryFrom<&str> for Decimal

Try to convert a &str into a Decimal.

Can fail if the value is out of range for Decimal.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: &str) -> Result<Self, Error>

Performs the conversion.

impl TryFrom<Decimal> for f32

Try to convert a Decimal to f32.

Can fail if the Decimal is out of range for f32.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: Decimal) -> Result<Self, Error>

Performs the conversion.

impl TryFrom<Decimal> for f64

Try to convert a Decimal to f64.

Can fail if the Decimal is out of range for f64.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: Decimal) -> Result<Self, Error>

Performs the conversion.

impl TryFrom<Decimal> for i128

Try to convert a Decimal to i128 by truncating and returning the integer component.

Can fail if the Decimal is out of range for i128.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: Decimal) -> Result<Self, Error>

Performs the conversion.

impl TryFrom<Decimal> for i16

Try to convert a Decimal to i16 by truncating and returning the integer component.

Can fail if the Decimal is out of range for i16.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: Decimal) -> Result<Self, Error>

Performs the conversion.

impl TryFrom<Decimal> for i32

Try to convert a Decimal to i32 by truncating and returning the integer component.

Can fail if the Decimal is out of range for i32.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: Decimal) -> Result<Self, Error>

Performs the conversion.

impl TryFrom<Decimal> for i64

Try to convert a Decimal to i64 by truncating and returning the integer component.

Can fail if the Decimal is out of range for i64.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: Decimal) -> Result<Self, Error>

Performs the conversion.

impl TryFrom<Decimal> for i8

Try to convert a Decimal to i8 by truncating and returning the integer component.

Can fail if the Decimal is out of range for i8.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: Decimal) -> Result<Self, Error>

Performs the conversion.

impl TryFrom<Decimal> for isize

Try to convert a Decimal to isize by truncating and returning the integer component.

Can fail if the Decimal is out of range for isize.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: Decimal) -> Result<Self, Error>

Performs the conversion.

impl TryFrom<Decimal> for u128

Try to convert a Decimal to u128 by truncating and returning the integer component.

Can fail if the Decimal is out of range for u128.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: Decimal) -> Result<Self, Error>

Performs the conversion.

impl TryFrom<Decimal> for u16

Try to convert a Decimal to u16 by truncating and returning the integer component.

Can fail if the Decimal is out of range for u16.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: Decimal) -> Result<Self, Error>

Performs the conversion.

impl TryFrom<Decimal> for u32

Try to convert a Decimal to u32 by truncating and returning the integer component.

Can fail if the Decimal is out of range for u32.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: Decimal) -> Result<Self, Error>

Performs the conversion.

impl TryFrom<Decimal> for u64

Try to convert a Decimal to u64 by truncating and returning the integer component.

Can fail if the Decimal is out of range for u64.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: Decimal) -> Result<Self, Error>

Performs the conversion.

impl TryFrom<Decimal> for u8

Try to convert a Decimal to u8 by truncating and returning the integer component.

Can fail if the Decimal is out of range for u8.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: Decimal) -> Result<Self, Error>

Performs the conversion.

impl TryFrom<Decimal> for usize

Try to convert a Decimal to usize by truncating and returning the integer component.

Can fail if the Decimal is out of range for usize.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: Decimal) -> Result<Self, Error>

Performs the conversion.

impl TryFrom<PgNumeric> for Decimal

Available on (crate features db-diesel1-postgres or db-diesel2-postgres) and (crate features db-tokio-postgres or db-postgres or db-diesel1-postgres or db-diesel2-postgres) only.

type Error = Box<dyn Error + Sync + Send>

The type returned in the event of a conversion error.

fn try_from(numeric: PgNumeric) -> Result<Self>

Performs the conversion.

impl TryFrom<f32> for Decimal

Try to convert a f32 into a Decimal.

Can fail if the value is out of range for Decimal.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: f32) -> Result<Self, Error>

Performs the conversion.

impl TryFrom<f64> for Decimal

Try to convert a f64 into a Decimal.

Can fail if the value is out of range for Decimal.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: f64) -> Result<Self, Error>

Performs the conversion.

impl UpperExp for Decimal

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Zero for Decimal

fn zero() -> Decimal

Returns the additive identity element of Self, 0. Read more

fn is_zero(&self) -> bool

Returns true if self is equal to the additive identity.

fn set_zero(&mut self)

Sets self to the additive identity element of Self, 0.

impl Copy for Decimal

impl Eq for Decimal

impl ScalarOperand for Decimal

Available on crate feature ndarray only.

Auto Trait Implementations§

impl Freeze for Decimal

impl RefUnwindSafe for Decimal

impl Send for Decimal

impl Sync for Decimal

impl Unpin for Decimal

impl UnwindSafe for Decimal

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> ArchivePointee for T

type ArchivedMetadata = ()

The archived version of the pointer metadata for this type.

fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata ) -> <T as Pointee>::Metadata

Converts some archived metadata to the pointer metadata for itself.

impl<T> ArchiveUnsized for T
where T: Archive,

type Archived = <T as Archive>::Archived

The archived counterpart of this type. Unlike Archive, it may be unsized. Read more

type MetadataResolver = ()

The resolver for the metadata of this type. Read more

unsafe fn resolve_metadata( &self, _: usize, _: <T as ArchiveUnsized>::MetadataResolver, _: *mut <<T as ArchiveUnsized>::Archived as ArchivePointee>::ArchivedMetadata )

Creates the archived version of the metadata for this value at the given position and writes it to the given output. Read more

unsafe fn resolve_unsized( &self, from: usize, to: usize, resolver: Self::MetadataResolver, out: *mut RelPtr<Self::Archived, <isize as Archive>::Archived> )

Resolves a relative pointer to this value with the given from and to and writes it to the given output. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> BorrowToSql for T
where T: ToSql,

fn borrow_to_sql(&self) -> &dyn ToSql

Returns a reference to self as a ToSql trait object.

impl<T> CallHasher for T
where T: Hash + ?Sized,

default fn get_hash<H, B>(value: &H, build_hasher: &B) -> u64
where H: Hash + ?Sized, B: BuildHasher,

impl<Q, K> Comparable<K> for Q
where Q: Ord + ?Sized, K: Borrow<Q> + ?Sized,

fn compare(&self, key: &K) -> Ordering

Compare self to key and return their ordering.

impl<F, W, T, D> Deserialize<With<T, W>, D> for F
where W: DeserializeWith<F, T, D>, D: Fallible + ?Sized, F: ?Sized,

fn deserialize( &self, deserializer: &mut D ) -> Result<With<T, W>, <D as Fallible>::Error>

Deserializes using the given deserializer

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<'v, T> FromForm<'v> for T
where T: FromFormField<'v>,

type Context = FromFieldContext<'v, T>

The form guard’s parsing context.

fn init(opts: Options) -> <T as FromForm<'v>>::Context

Initializes and returns the parsing context for Self.

fn push_value(ctxt: &mut <T as FromForm<'v>>::Context, field: ValueField<'v>)

Processes the value field field.

fn push_data<'life0, 'life1, 'async_trait>( ctxt: &'life0 mut FromFieldContext<'v, T>, field: DataField<'v, 'life1> ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
where 'v: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, T: 'async_trait,

Processes the data field field.

fn finalize(ctxt: <T as FromForm<'v>>::Context) -> Result<T, Errors<'v>>

Finalizes parsing. Returns the parsed value when successful or collection of Errors otherwise.

fn push_error(_ctxt: &mut Self::Context, _error: Error<'r>)

Processes the external form or field error _error. Read more

fn default(opts: Options) -> Option<Self>

Returns a default value, if any, to use when a value is desired and parsing fails. Read more

impl<T, ST, DB> FromSqlRow<ST, DB> for T
where T: Queryable<ST, DB>, ST: SqlTypeOrSelectable, DB: Backend, <T as Queryable<ST, DB>>::Row: FromStaticSqlRow<ST, DB>,

fn build_from_row<'a>( row: &impl Row<'a, DB> ) -> Result<T, Box<dyn Error + Sync + Send>>

See the trait documentation.

impl<T, ST, DB> FromStaticSqlRow<ST, DB> for T
where DB: Backend, T: FromSql<ST, DB>, ST: SingleValue,

fn build_from_row<'a>( row: &impl Row<'a, DB> ) -> Result<T, Box<dyn Error + Sync + Send>>

See the trait documentation

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> IntoCollection<T> for T

fn into_collection<A>(self) -> SmallVec<A>
where A: Array<Item = T>,

Converts self into a collection.

fn mapped<U, F, A>(self, f: F) -> SmallVec<A>
where F: FnMut(T) -> U, A: Array<Item = U>,

impl<T> IntoSql for T

fn into_sql<T>(self) -> Self::Expression
where Self: AsExpression<T> + Sized, T: SqlType + TypedExpressionType,

Convert self to an expression for Diesel’s query builder. Read more

fn as_sql<'a, T>(&'a self) -> <&'a Self as AsExpression<T>>::Expression
where &'a Self: AsExpression<T>, T: SqlType + TypedExpressionType,

Convert &self to an expression for Diesel’s query builder. Read more

impl<T> LayoutRaw for T

fn layout_raw(_: <T as Pointee>::Metadata) -> Result<Layout, LayoutError>

Gets the layout of the type.

impl<T> Paint for T
where T: ?Sized,

fn fg(&self, value: Color) -> Painted<&T>

Returns a styled value derived from self with the foreground set to value.

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Returns self with the fg() set to Color::Primary.

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Returns self with the fg() set to Color::Fixed.

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Returns self with the fg() set to Color::BrightBlack.

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Returns self with the fg() set to Color::BrightYellow.

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Returns self with the bg() set to Color::Fixed.

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fn bright(&self) -> Painted<&T>

Returns self with the quirk() set to Quirk::Bright.

§Example

println!("{}", value.bright());

fn on_bright(&self) -> Painted<&T>

Returns self with the quirk() set to Quirk::OnBright.

§Example

println!("{}", value.on_bright());

fn whenever(&self, value: Condition) -> Painted<&T>

Conditionally enable styling based on whether the Condition value applies. Replaces any previous condition.

See the crate level docs for more details.

§Example

Enable styling painted only when both stdout and stderr are TTYs:

use yansi::{Paint, Condition};

painted.red().on_yellow().whenever(Condition::STDOUTERR_ARE_TTY);

fn new(self) -> Painted<Self>
where Self: Sized,

Create a new Painted with a default Style. Read more

fn paint<S>(&self, style: S) -> Painted<&Self>
where S: Into<Style>,

Apply a style wholesale to self. Any previous style is replaced. Read more

impl<T> Pointee for T

type Metadata = ()

The type for metadata in pointers and references to Self.

impl<T> Same for T

type Output = T

Should always be Self

impl<Borrowed> SampleBorrow<Borrowed> for Borrowed
where Borrowed: SampleUniform,

fn borrow(&self) -> &Borrowed

Immutably borrows from an owned value. See Borrow::borrow

impl<T, S> SerializeUnsized<S> for T
where T: Serialize<S>, S: Serializer + ?Sized,

fn serialize_unsized( &self, serializer: &mut S ) -> Result<usize, <S as Fallible>::Error>

Writes the object and returns the position of the archived type.

fn serialize_metadata(&self, _: &mut S) -> Result<(), <S as Fallible>::Error>

Serializes the metadata for the given type.

impl<T, ST, DB> StaticallySizedRow<ST, DB> for T
where ST: SqlTypeOrSelectable + TupleSize, T: Queryable<ST, DB>, DB: Backend,

const FIELD_COUNT: usize = <ST as crate::util::TupleSize>::SIZE

The number of fields that this type will consume.

impl<T> ToOwned for T
where T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T> ToString for T
where T: Display + ?Sized,

default fn to_string(&self) -> String

Converts the given value to a String. Read more

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

fn vzip(self) -> V

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more

impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,

impl<T> FromSqlOwned for T
where T: for<'a> FromSql<'a>,

impl<T> LinalgScalar for T
where T: One<Output = T> + Add<Output = T> + Sub<Output = T> + 'static + Mul + Copy + Div<Output = T> + Zero,

impl<T> NumAssign for T
where T: Num + NumAssignOps,

impl<T, Rhs> NumAssignOps<Rhs> for T
where T: AddAssign<Rhs> + SubAssign<Rhs> + MulAssign<Rhs> + DivAssign<Rhs> + RemAssign<Rhs>,

impl<T> NumAssignRef for T
where T: NumAssign + for<'r> NumAssignOps<&'r T>,

impl<T, Rhs, Output> NumOps<Rhs, Output> for T
where T: Sub<Rhs, Output = Output> + Mul<Rhs, Output = Output> + Div<Rhs, Output = Output> + Add<Rhs, Output = Output> + Rem<Rhs, Output = Output>,

impl<T> NumRef for T
where T: Num + for<'r> NumOps<&'r T>,

impl<T, Base> RefNum<Base> for T
where T: NumOps<Base, Base> + for<'r> NumOps<&'r Base, Base>,