Struct MaybeSpan 

pub struct MaybeSpan {
    pub start: MaybePos,
    pub end: MaybePos,
}

A start..end pair of MaybePos.

Fields

start: MaybePos

end: MaybePos

Implementations

impl MaybeSpan

pub const NONE: MaybeSpan

Both endpoints all-unknown.

pub fn known(s: Span) -> MaybeSpan

Every field of both endpoints known.

pub fn resolve(self) -> Option<Span>

The resolved span, or None if any field of either endpoint is unknown. Both-or-neither, matching the meta union’s invariant.

Trait Implementations

impl Clone for MaybeSpan

fn clone(&self) -> MaybeSpan

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for MaybeSpan

impl Debug for MaybeSpan

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

Formats the value using the given formatter.

impl Default for MaybeSpan

fn default() -> MaybeSpan

Returns the “default value” for a type.

impl Eq for MaybeSpan

impl Hash for MaybeSpan

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for MaybeSpan

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for MaybeSpan