Enum Keeping 

pub enum Keeping<T> {
    Keep,
    Set(T),
}

Builder field type when building struct implementing Default.

Variants

Keep

Builder field value when keeping data from Default instance.

Set(T)

Builder field value to override Default instance.

Implementations

impl<T> Keeping<T>

pub fn is_set(&self) -> bool

Check if set.

pub fn unwrap(self) -> T

Consume to return set value.

It shouldn’t be called for Keeping::Keep.

Trait Implementations

impl<T> Debug for Keeping<T>

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

Formats the value using the given formatter.

impl<T> Default for Keeping<T>

fn default() -> Keeping<T>

Returns the “default value” for a type.