Struct syntax::ext::hygiene::ExpnId

pub struct ExpnId(_);

A unique ID associated with a macro invocation and expansion.

Methods

impl ExpnId

pub fn fresh(expn_data: Option<ExpnData>) -> ExpnId

pub fn root() -> ExpnId

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

pub fn as_u32(self) -> u32

pub fn from_u32(raw: u32) -> ExpnId

pub fn expn_data(self) -> ExpnData

pub fn set_expn_data(self, expn_data: ExpnData)

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

pub fn outer_expn_is_descendant_of(self, ctxt: SyntaxContext) -> bool

expn_id.outer_expn_is_descendant_of(ctxt) is equivalent to but faster than expn_id.is_descendant_of(ctxt.outer_expn()).

Trait Implementations

impl PartialEq<ExpnId> for ExpnId

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

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

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

This method tests for !=.

impl Decodable for ExpnId

fn decode<D>(&mut D) -> Result<ExpnId, <D as Decoder>::Error> where
    D: Decoder, 

impl Debug for ExpnId

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

Formats the value using the given formatter.

impl Hash for ExpnId

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

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 Eq for ExpnId

impl Clone for ExpnId

fn clone(&self) -> ExpnId

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Encodable for ExpnId

fn encode<E>(&self, &mut E) -> Result<(), <E as Encoder>::Error> where
    E: Encoder, 

impl Copy for ExpnId