pub struct Permill(_);
Expand description

A fixed point representation of a number in the range [0, 1].

Parts per Million

Implementations

From an explicitly defined number of parts per maximum of the type.

Converts a percent into Self. Equal to x / 100.

This can be created at compile time.

👎Deprecated: Use PerThing::from_rational instead

Integer multiplication with another value, saturating at 1.

Integer division with another value, rounding down.

Saturating division. Compute self / rhs, saturating at one if rhs < self.

The rounding method must be specified. e.g.:

let pc = |x| Percent::from_percent(x);
assert_eq!(
	pc(2).saturating_div(pc(3), Down),
	pc(66),
);
assert_eq!(
	pc(1).saturating_div(pc(3), NearestPrefUp),
	pc(33),
);
assert_eq!(
	pc(2).saturating_div(pc(3), NearestPrefDown),
	pc(67),
);
assert_eq!(
	pc(1).saturating_div(pc(3), Up),
	pc(34),
);

Converts a percent into Self. Equal to x / 1000.

This can be created at compile time.

Trait Implementations

The resulting type after applying the + operator.
Performs the + operation. Read more
Returns the smallest finite number this type can represent
Returns the largest finite number this type can represent
Adds two numbers, checking for overflow. If overflow happens, None is returned. Read more

Note

CheckedMul will never fail for PerThings.

Multiplies two numbers, checking for underflow or overflow. If underflow or overflow happens, None is returned. Read more
Subtracts two numbers, checking for underflow. If underflow happens, None is returned. Read more
Returns a copy of the value. Read more
Performs copy-assignment from source. Read more

Implementation makes any compact encoding of PerThing::Inner valid, when decoding it will saturate up to PerThing::ACCURACY.

A compact-encodable type that should be used as the encoding.
Returns the compact-encodable type.
Decode Self from the compact-decoded type.
Formats the value using the given formatter. Read more
Attempt to deserialise the value from input.
Attempt to skip the encoded value from input. Read more
Returns the fixed encoded size of the type. Read more
Returns the “default value” for a type. Read more
Deserialize this value from the given Serde deserializer. Read more
The resulting type after applying the / operator.
Performs the / operation. Read more
The resulting type after applying the / operator.
Performs the / operation. Read more
Convert self to a slice and append it to the destination.
Convert self to an owned vector.
Convert self to a slice and then invoke the given closure with it.
If possible give a hint of expected size of the encoding. Read more
Calculates the encoded size. Read more
Converts to this type from the input type.
Upper bound, in bytes, of the maximum encoded size of this item.

Non-overflow multiplication.

This is tailored to be used with a balance type.

The resulting type after applying the * operator.
Performs the * operation. Read more
The resulting type after applying the * operator.
Performs the * operation. Read more
Returns the multiplicative identity element of Self, 1. Read more
Sets self to the multiplicative identity element of Self, 1.
Returns true if self is equal to the multiplicative identity. Read more
This method returns an Ordering between self and other. Read more
Compares and returns the maximum of two values. Read more
Compares and returns the minimum of two values. Read more
Restrict a value to a certain interval. Read more
This method tests for self and other values to be equal, and is used by ==. Read more
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more
This method returns an ordering between self and other values if one exists. Read more
This method tests less than (for self and other) and is used by the < operator. Read more
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
This method tests greater than (for self and other) and is used by the > operator. Read more
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

Consume self and return the number of parts per thing.

Build this type from a number of parts per thing.

NOTE: saturate to 0 or 1 if x is beyond [0, 1]

The data type used to build this per-thingy.
A data type larger than Self::Inner, used to avoid overflow in some computations. It must be able to compute ACCURACY^2. Read more
The accuracy of this type.
Approximate the fraction p/q into a per-thing fraction. Read more
Equivalent to Self::from_parts(0).
Return true if this is nothing.
Equivalent to Self::from_parts(Self::ACCURACY).
Return true if this is one.
Return the next lower value to self or self if it is already zero.
Return the next lower value to self or an error with the same value if self is already zero. Read more
Return the next higher value to self or self if it is already one.
Return the next higher value to self or an error with the same value if self is already one. Read more
Build this type from a percent. Equivalent to Self::from_parts(x * Self::ACCURACY / 100) but more accurate and can cope with potential type overflows. Read more
Return the product of multiplication of this value by itself.
Return the part left when self is saturating-subtracted from Self::one().
Multiplication that always rounds down to a whole number. The standard Mul rounds to the nearest whole number. Read more
Multiplication that always rounds the result up to a whole number. The standard Mul rounds to the nearest whole number. Read more
Saturating multiplication by the reciprocal of self. The result is rounded to the nearest whole number and saturates at the numeric bounds instead of overflowing. Read more
Saturating multiplication by the reciprocal of self. The result is rounded down to the nearest whole number and saturates at the numeric bounds instead of overflowing. Read more
Saturating multiplication by the reciprocal of self. The result is rounded up to the nearest whole number and saturates at the numeric bounds instead of overflowing. Read more
👎Deprecated: Use from_float instead
Same as Self::from_float.
Approximate the fraction p/q into a per-thing fraction. This will never overflow. Read more
👎Deprecated: Use from_rational instead
Same as Self::from_rational.
The result after applying the operator.
Returns self to the power rhs. Read more

Saturating addition. Compute self + rhs, saturating at the numeric bounds instead of overflowing. This operation is lossless if it does not saturate.

Saturating subtraction. Compute self - rhs, saturating at the numeric bounds instead of overflowing. This operation is lossless if it does not saturate.

Saturating multiply. Compute self * rhs, saturating at the numeric bounds instead of overflowing. This operation is lossy.

Saturating exponentiation. Computes self.pow(exp), saturating at the numeric bounds instead of overflowing. This operation is lossy.

Increment self by one, saturating.
Decrement self by one, saturating at zero.
Increment self by some amount, saturating.
Decrement self by some amount, saturating at zero.
Saturating addition. Computes self + other, saturating at the relevant high or low boundary of the type. Read more
Saturating subtraction. Computes self - other, saturating at the relevant high or low boundary of the type. Read more
Serialize this value into the given Serde serializer. Read more
The resulting type after applying the - operator.
Performs the - operation. Read more
The type identifying for which type info is provided. Read more
Returns the static type identifier for Self.
Returns the additive identity element of Self, 0. Read more
Returns true if self is equal to the additive identity.
Sets self to the additive identity element of Self, 0.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
Decode Self and consume all of the given input data. Read more
Decode Self and consume all of the given input data. Read more
Decode Self with the given maximum recursion depth and advance input by the number of bytes consumed. Read more

Returns the argument unchanged.

The compact type; this can be

Calls U::from(self).

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

Return an encoding of Self prepended by given slice.
Returns the smallest finite number this type can represent
Convert from a value of T into an equivalent instance of Self. Read more
Consume self to return an equivalent value of T. Read more
Compare if self is threshold greater or less than other.
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.
Convert from a value of T into an equivalent instance of Self.
Consume self to return an equivalent value of T.
Returns the largest finite number this type can represent