Enum MaybeDefault 

pub enum MaybeDefault<T> {
    None,
    Default,
    Some(T),
}

A type representing an optional value or a default.

Variants

None

Nothing.

Default

Use the context-dependent default value.

Some(T)

A provided value.

Trait Implementations

impl<T: Clone> Clone for MaybeDefault<T>

fn clone(&self) -> MaybeDefault<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for MaybeDefault<T>

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

Formats the value using the given formatter.

impl<T> From<T> for MaybeDefault<T>

fn from(value: T) -> Self

Converts to this type from the input type.

impl<T: PartialEq> PartialEq for MaybeDefault<T>

fn eq(&self, other: &MaybeDefault<T>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

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

impl<T> StructuralPartialEq for MaybeDefault<T>