Struct syntax_pos::hygiene::ExpnId

pub struct ExpnId(_);

A unique ID associated with a macro invocation and expansion.

Methods

impl ExpnId

pub fn fresh(parent: ExpnId, expn_info: Option<ExpnInfo>) -> Self

pub fn root() -> Self

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 parent(self) -> ExpnId

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

pub fn set_expn_info(self, info: ExpnInfo)

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()).

pub fn looks_like_proc_macro_derive(self) -> bool

Trait Implementations

impl Copy 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 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 Eq for ExpnId

impl Debug for ExpnId

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

Formats the value using the given formatter.

impl Hash for ExpnId

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].