Enum rustc_mir_build::thir::pattern::usefulness::Reachability

pub(crate) enum Reachability {
    Reachable(Vec<Span>),
    Unreachable,
}

Indicates whether or not a given arm is reachable.

Variants

Reachable(Vec<Span>)

The arm is reachable. This additionally carries a set of or-pattern branches that have been found to be unreachable despite the overall arm being reachable. Used only in the presence of or-patterns, otherwise it stays empty.

Unreachable

The arm is unreachable.

Trait Implementations

impl Clone for Reachability

fn clone(&self) -> Reachability

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Reachability

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

Formats the value using the given formatter.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 24 bytes

Size for each variant:

• Reachable: 24 bytes
• Unreachable: 0 bytes