Trait sp_runtime::FixedPointNumber
source · pub trait FixedPointNumber: Sized + Copy + Default + Debug + Saturating + Bounded + Eq + PartialEq + Ord + PartialOrd + CheckedSub + CheckedAdd + CheckedMul + CheckedDiv + Add + Sub + Div + Mul + Zero + One {
type Inner: Debug + One + CheckedMul + CheckedDiv + FixedPointOperand;
const DIV: Self::Inner;
const SIGNED: bool;
Show 22 methods
// Required methods
fn from_inner(int: Self::Inner) -> Self;
fn into_inner(self) -> Self::Inner;
// Provided methods
fn accuracy() -> Self::Inner { ... }
fn saturating_from_integer<N>(int: N) -> Self
where N: FixedPointOperand { ... }
fn checked_from_integer<N>(int: N) -> Option<Self>
where N: Into<Self::Inner> { ... }
fn saturating_from_rational<N, D>(n: N, d: D) -> Self
where N: FixedPointOperand,
D: FixedPointOperand { ... }
fn checked_from_rational<N, D>(n: N, d: D) -> Option<Self>
where N: FixedPointOperand,
D: FixedPointOperand { ... }
fn checked_mul_int<N>(self, n: N) -> Option<N>
where N: FixedPointOperand { ... }
fn saturating_mul_int<N>(self, n: N) -> N
where N: FixedPointOperand { ... }
fn checked_div_int<N>(self, d: N) -> Option<N>
where N: FixedPointOperand { ... }
fn saturating_div_int<N>(self, d: N) -> N
where N: FixedPointOperand { ... }
fn saturating_mul_acc_int<N>(self, n: N) -> N
where N: FixedPointOperand { ... }
fn saturating_abs(self) -> Self { ... }
fn reciprocal(self) -> Option<Self> { ... }
fn is_one(&self) -> bool { ... }
fn is_positive(self) -> bool { ... }
fn is_negative(self) -> bool { ... }
fn trunc(self) -> Self { ... }
fn frac(self) -> Self { ... }
fn ceil(self) -> Self { ... }
fn floor(self) -> Self { ... }
fn round(self) -> Self { ... }
}Expand description
Re-export top-level arithmetic stuff. Something that implements a decimal fixed point number.
The precision is given by Self::DIV, i.e. 1 / DIV can be represented.
Each type can store numbers from Self::Inner::min_value() / Self::DIV
to Self::Inner::max_value() / Self::DIV.
This is also referred to as the accuracy of the type in the documentation.
Required Associated Types§
sourcetype Inner: Debug + One + CheckedMul + CheckedDiv + FixedPointOperand
type Inner: Debug + One + CheckedMul + CheckedDiv + FixedPointOperand
The underlying data type used for this fixed point number.
Required Associated Constants§
Required Methods§
sourcefn from_inner(int: Self::Inner) -> Self
fn from_inner(int: Self::Inner) -> Self
Builds this type from an integer number.
sourcefn into_inner(self) -> Self::Inner
fn into_inner(self) -> Self::Inner
Consumes self and returns the inner raw value.
Provided Methods§
sourcefn saturating_from_integer<N>(int: N) -> Selfwhere
N: FixedPointOperand,
fn saturating_from_integer<N>(int: N) -> Selfwhere N: FixedPointOperand,
Creates self from an integer number int.
Returns Self::max or Self::min if int exceeds accuracy.
sourcefn checked_from_integer<N>(int: N) -> Option<Self>where
N: Into<Self::Inner>,
fn checked_from_integer<N>(int: N) -> Option<Self>where N: Into<Self::Inner>,
Creates self from an integer number int.
Returns None if int exceeds accuracy.
sourcefn saturating_from_rational<N, D>(n: N, d: D) -> Selfwhere
N: FixedPointOperand,
D: FixedPointOperand,
fn saturating_from_rational<N, D>(n: N, d: D) -> Selfwhere N: FixedPointOperand, D: FixedPointOperand,
Creates self from a rational number. Equal to n / d.
Panics if d = 0. Returns Self::max or Self::min if n / d exceeds accuracy.
sourcefn checked_from_rational<N, D>(n: N, d: D) -> Option<Self>where
N: FixedPointOperand,
D: FixedPointOperand,
fn checked_from_rational<N, D>(n: N, d: D) -> Option<Self>where N: FixedPointOperand, D: FixedPointOperand,
Creates self from a rational number. Equal to n / d.
Returns None if d == 0 or n / d exceeds accuracy.
sourcefn checked_mul_int<N>(self, n: N) -> Option<N>where
N: FixedPointOperand,
fn checked_mul_int<N>(self, n: N) -> Option<N>where N: FixedPointOperand,
Checked multiplication for integer type N. Equal to self * n.
Returns None if the result does not fit in N.
sourcefn saturating_mul_int<N>(self, n: N) -> Nwhere
N: FixedPointOperand,
fn saturating_mul_int<N>(self, n: N) -> Nwhere N: FixedPointOperand,
Saturating multiplication for integer type N. Equal to self * n.
Returns N::min or N::max if the result does not fit in N.
sourcefn checked_div_int<N>(self, d: N) -> Option<N>where
N: FixedPointOperand,
fn checked_div_int<N>(self, d: N) -> Option<N>where N: FixedPointOperand,
Checked division for integer type N. Equal to self / d.
Returns None if the result does not fit in N or d == 0.
sourcefn saturating_div_int<N>(self, d: N) -> Nwhere
N: FixedPointOperand,
fn saturating_div_int<N>(self, d: N) -> Nwhere N: FixedPointOperand,
Saturating division for integer type N. Equal to self / d.
Panics if d == 0. Returns N::min or N::max if the result does not fit in N.
sourcefn saturating_mul_acc_int<N>(self, n: N) -> Nwhere
N: FixedPointOperand,
fn saturating_mul_acc_int<N>(self, n: N) -> Nwhere N: FixedPointOperand,
Saturating multiplication for integer type N, adding the result back.
Equal to self * n + n.
Returns N::min or N::max if the multiplication or final result does not fit in N.
sourcefn saturating_abs(self) -> Self
fn saturating_abs(self) -> Self
Saturating absolute value.
Returns Self::max if self == Self::min.
sourcefn reciprocal(self) -> Option<Self>
fn reciprocal(self) -> Option<Self>
Takes the reciprocal (inverse). Equal to 1 / self.
Returns None if self = 0.
sourcefn is_positive(self) -> bool
fn is_positive(self) -> bool
Returns true if self is positive and false if the number is zero or negative.
sourcefn is_negative(self) -> bool
fn is_negative(self) -> bool
Returns true if self is negative and false if the number is zero or positive.
sourcefn frac(self) -> Self
fn frac(self) -> Self
Returns the fractional part.
Note: the returned fraction will be non-negative for negative numbers, except in the case where the integer part is zero.
sourcefn ceil(self) -> Self
fn ceil(self) -> Self
Returns the smallest integer greater than or equal to a number.
Saturates to Self::max (truncated) if the result does not fit.