1 //! This modules handles hygiene information.
3 //! Specifically, `ast` + `Hygiene` allows you to create a `Name`. Note that, at
4 //! this moment, this is horribly incomplete and handles only `$crate`.
12 HirFileId, HirFileIdRepr, MacroDefKind,
17 // This is what `$crate` expands to
18 def_crate: Option<CrateId>,
22 pub fn new(db: &impl AstDatabase, file_id: HirFileId) -> Hygiene {
23 let def_crate = match file_id.0 {
24 HirFileIdRepr::FileId(_) => None,
25 HirFileIdRepr::MacroFile(macro_file) => {
26 let loc = db.lookup_intern_macro(macro_file.macro_call_id);
28 MacroDefKind::Declarative => Some(loc.def.krate),
29 MacroDefKind::BuiltIn(_) => None,
36 pub fn new_unhygienic() -> Hygiene {
37 Hygiene { def_crate: None }
40 // FIXME: this should just return name
41 pub fn name_ref_to_name(&self, name_ref: ast::NameRef) -> Either<Name, CrateId> {
42 if let Some(def_crate) = self.def_crate {
43 if name_ref.text() == "$crate" {
44 return Either::Right(def_crate);
47 Either::Left(name_ref.as_name())