Enum Part

pub enum Part<T> {
    Held(T),
    Empty,
    Unreadable(String),
}

One store inside a backup, and what this build can do with it.

Three states rather than an Option, because “the backup holds no sources.json” and “the backup holds one this build refuses” call for opposite things to be said and opposite things to be done. Collapsed into one, the second would restore as though the file had never existed — which is the quietest possible way to lose a year of fetching.

Variants

Held(T)

Held, and readable by this build.

Empty

There was no such store when the backup was made.

Unreadable(String)

Present, and refused by that store’s own rule. Carries what it said.

Implementations

impl<T> Part<T>

pub fn held(&self) -> Option<&T>

The store, when there is one this build can use.

Trait Implementations

impl<T: Clone> Clone for Part<T>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Part<T>

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

Formats the value using the given formatter.