Enum File 

pub enum File {
    FileId(u16),
    Synthetic(u16),
}

The source site containing syntax.

FileId is the ordinary source-file identity. Keeping the identity behind an enum lets the syntax model add distinct embedded or macro hygiene sites without changing every span and token field.

Variants

FileId(u16)

An ordinary source file registered under a compact process-local id.

Synthetic(u16)

Syntax constructed without a corresponding on-disk source file.

Implementations

impl File

pub fn fresh() -> Self

Allocates a compact process-local file label.

The counter may recycle after all u16 values have been used. Source snapshot identity is carried by the shared Source allocation, so a recycled display label cannot make unrelated spans equal or joinable.

pub const fn from_raw(raw: u16) -> Self

Creates an identity from an application-defined integer.

pub const fn is_synthetic(self) -> bool

Reports whether this identity labels syntax constructed outside an input file, whose text records no layout an author wrote.

pub const fn into_raw(self) -> u16

Returns the application-defined integer stored by this identity.

Trait Implementations

impl Clone for File

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for File

impl Debug for File

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

Formats the value using the given formatter.

impl Eq for File

impl Hash for File

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 File

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for File