Enum PowerReading 

pub enum PowerReading<T> {
    Known(T),
    Unsupported,
    Unknown,
}

One power reading, or the reason there is no value.

The distinction matters: a desktop with no battery is not a device at 100%, and an application that treats it as one refuses to run its own work on a machine that is plugged into the wall.

Variants

Known(T)

The platform reported this value.

Unsupported

This platform has no API for it.

Unknown

The platform has the API but has not reported a value yet.

Implementations

impl<T> PowerReading<T>

pub fn known(self) -> Option<T>

The value, if the platform reported one.

pub fn is_supported(&self) -> bool

Whether this platform can answer at all.

pub fn unwrap_or(self, fallback: T) -> T

The value, or fallback when there is none.

Trait Implementations

impl<T: Clone> Clone for PowerReading<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Copy> Copy for PowerReading<T>

impl<T: Debug> Debug for PowerReading<T>

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

Formats the value using the given formatter.

impl<T: Eq> Eq for PowerReading<T>

impl<T: PartialEq> PartialEq for PowerReading<T>

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

Equality operator ==.

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

Inequality operator !=.

impl<T: PartialEq> StructuralPartialEq for PowerReading<T>