Struct syntax_pos::hygiene::Mark

pub struct Mark(_);

A mark is a unique id associated with a macro expansion.

Methods

impl Mark

pub fn fresh(parent: Mark) -> Self

pub fn root() -> Self

The mark of the theoretical expansion that generates freshly parsed, unexpanded AST.

pub fn as_u32(self) -> u32

pub fn from_u32(raw: u32) -> Mark

pub fn expn_info(self) -> Option<ExpnInfo>

pub fn set_expn_info(self, info: ExpnInfo)

pub fn modern(self) -> Mark

pub fn transparency(self) -> Transparency

pub fn set_transparency(self, transparency: Transparency)

pub fn is_builtin(self) -> bool

pub fn set_is_builtin(self, is_builtin: bool)

pub fn is_descendant_of(self, ancestor: Mark) -> bool

pub fn least_ancestor(a: Mark, b: Mark) -> Mark

Computes a mark such that both input marks are descendants of (or equal to) the returned mark. That is, the following holds:

let la = least_ancestor(a, b);
assert!(a.is_descendant_of(la))
assert!(b.is_descendant_of(la))

Trait Implementations

impl Copy for Mark

impl Clone for Mark

fn clone(&self) -> Mark

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialEq for Mark

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Eq for Mark

impl Hash for Mark

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,

Feeds a slice of this type into the given [Hasher].

impl Debug for Mark

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

Formats the value using the given formatter.

impl Encodable for Mark

fn encode<__S: Encoder>(&self, s: &mut __S) -> Result<(), __S::Error>

impl Decodable for Mark

fn decode<__D: Decoder>(d: &mut __D) -> Result<Mark, __D::Error>