Enum Index 

pub enum Index {
    NewUnknown,
    New(usize),
    Existing(usize),
}

Result of a cache insertion.

Variants

NewUnknown

A new entry whose position is not known.

New(usize)

A new (or never evaluated) entry at this position.

Existing(usize)

An entry evaluated before, at this position.

Implementations

impl Index

pub fn new_unknown() -> Self

pub fn new_at(position: usize) -> Self

pub fn existing(position: usize) -> Self

pub fn is_new(&self) -> bool

Whether the entry has not been evaluated yet.

pub fn position(&self) -> Option<usize>

pub fn has_position(&self) -> bool

pub fn to_cache_key(&self, fallback_path: &SearchPath) -> CacheKey

A key for the entry: its position when known, fallback_path otherwise.

Trait Implementations

impl Clone for Index

fn clone(&self) -> Index

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Index

impl Debug for Index

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

Formats the value using the given formatter.

impl Eq for Index

impl Hash for Index

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 Index

fn eq(&self, other: &Index) -> 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 StructuralPartialEq for Index