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Unit

quantities

Trait Unit 

Source 
pub trait Unit:
    Copy
    + Eq
    + PartialEq
    + Sized
    + Mul<AmountT>
    + Display {
    type QuantityType: Quantity<UnitType = Self>;

    // Required methods
    fn iter() -> impl Iterator<Item = Self>;
    fn name(&self) -> String;
    fn symbol(&self) -> String;
    fn si_prefix(&self) -> Option<SIPrefix>;

    // Provided methods
    fn from_symbol(symbol: &str) -> Option<Self> { ... }
    fn as_qty(&self) -> Self::QuantityType { ... }
    fn fmt(&self, form: &mut Formatter<'_>) -> Result { ... }
}
Expand description

The abstract type of units used to define quantities.

Required Associated Types§

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type QuantityType: Quantity<UnitType = Self>

Associated type of quantity

Required Methods§

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fn iter() -> impl Iterator<Item = Self>

Returns an iterator over the variants of Self.

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fn name(&self) -> String

Returns the name of self.

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fn symbol(&self) -> String

Returns the symbol used to represent self.

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fn si_prefix(&self) -> Option<SIPrefix>

Returns the SI prefix of self, or None is self is not a SI unit.

Provided Methods§

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fn from_symbol(symbol: &str) -> Option<Self>

Returns Some(unit) where unit.symbol() == symbol, or None if there is no such unit.

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fn as_qty(&self) -> Self::QuantityType

Returns 1 * self

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

Formats self using the given formatter.

§Errors

This function will only return an instance of Error returned from the formatter.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§