Struct fixed_decimal::CompactDecimal

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pub struct CompactDecimal { /* private fields */ }
Expand description

A struct containing a FixedDecimal significand together with an exponent, representing a number written in compact notation (such as 1.2M). This represents a source number, as defined in UTS #35. The value exponent=0 represents a number in non-compact notation (such as 1 200 000).

This is distinct from crate::ScientificDecimal because it does not represent leading 0s nor a sign in the exponent, and behaves differently in pluralization.

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impl CompactDecimal

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pub fn from_significand_and_exponent( significand: FixedDecimal, exponent: u8, ) -> Self

Constructs a CompactDecimal from its significand and exponent.

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pub fn significand(&self) -> &FixedDecimal

Returns a reference to the significand of self.

assert_eq!(
    CompactDecimal::from_str("+1.20c6").unwrap().significand(),
    &FixedDecimal::from_str("+1.20").unwrap()
);
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pub fn into_significand(self) -> FixedDecimal

Returns the significand of self.

assert_eq!(
    CompactDecimal::from_str("+1.20c6")
        .unwrap()
        .into_significand(),
    FixedDecimal::from_str("+1.20").unwrap()
);
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pub fn exponent(&self) -> u8

Returns the exponent of self.

assert_eq!(CompactDecimal::from_str("+1.20c6").unwrap().exponent(), 6);
assert_eq!(CompactDecimal::from_str("1729").unwrap().exponent(), 0);
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impl CompactDecimal

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pub fn to_string(&self) -> String

Converts the given value to a String.

Under the hood, this uses an efficient [Writeable] implementation. However, in order to avoid allocating a string, it is more efficient to use [Writeable] directly.

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impl CompactDecimal

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pub fn try_from_str(s: &str) -> Result<Self, ParseError>

Parses a CompactDecimal.

Trait Implementations§

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impl Clone for CompactDecimal

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fn clone(&self) -> CompactDecimal

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
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impl Debug for CompactDecimal

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

Formats the value using the given formatter. Read more
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impl Display for CompactDecimal

This trait is implemented for compatibility with fmt!. To create a string, [Writeable::write_to_string] is usually more efficient.

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

Formats the value using the given formatter. Read more
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impl FromStr for CompactDecimal

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type Err = ParseError

The associated error which can be returned from parsing.
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fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type. Read more
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impl PartialEq for CompactDecimal

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Writeable for CompactDecimal

Render the CompactDecimal in sampleValue syntax. The letter c is used, rather than the deprecated e.

§Examples

assert_writeable_eq!(
    CompactDecimal::from_str("+1.20c6").unwrap(),
    "+1.20c6"
);
assert_writeable_eq!(CompactDecimal::from_str("+1729").unwrap(), "+1729");
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fn write_to<W: Write + ?Sized>(&self, sink: &mut W) -> Result

Writes a string to the given sink. Errors from the sink are bubbled up. The default implementation delegates to write_to_parts, and discards any Part annotations.
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fn writeable_length_hint(&self) -> LengthHint

Returns a hint for the number of UTF-8 bytes that will be written to the sink. Read more
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fn write_to_parts<S>(&self, sink: &mut S) -> Result<(), Error>
where S: PartsWrite + ?Sized,

Write bytes and Part annotations to the given sink. Errors from the sink are bubbled up. The default implementation delegates to write_to, and doesn’t produce any Part annotations.
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fn write_to_string(&self) -> Cow<'_, str>

Creates a new String with the data from this Writeable. Like ToString, but smaller and faster. Read more
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impl StructuralPartialEq for CompactDecimal

Auto Trait Implementations§

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.