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Lower and handle trait aliases in HIR

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Ryo Yoshida 2023-03-04 00:24:07 +09:00
parent e2ec3a6561
commit 29c957f973
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47 changed files with 334 additions and 75 deletions
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20
crates/hir/src/display.rs
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@ -18,8 +18,8 @@ use hir_ty::{
use crate::{
Adt, AsAssocItem, AssocItemContainer, Const, ConstParam, Enum, Field, Function, GenericParam,
HasCrate, HasVisibility, LifetimeParam, Macro, Module, Static, Struct, Trait, TyBuilder, Type,
TypeAlias, TypeOrConstParam, TypeParam, Union, Variant,
HasCrate, HasVisibility, LifetimeParam, Macro, Module, Static, Struct, Trait, TraitAlias,
TyBuilder, Type, TypeAlias, TypeOrConstParam, TypeParam, Union, Variant,
};
impl HirDisplay for Function {
@ -501,6 +501,22 @@ impl HirDisplay for Trait {
}
}
impl HirDisplay for TraitAlias {
fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> {
write_visibility(self.module(f.db).id, self.visibility(f.db), f)?;
let data = f.db.trait_alias_data(self.id);
write!(f, "trait {}", data.name)?;
let def_id = GenericDefId::TraitAliasId(self.id);
write_generic_params(def_id, f)?;
f.write_str(" = ")?;
// FIXME: Currently we lower every bounds in a trait alias as a trait bound on `Self` i.e.
// `trait Foo = Bar` is stored and displayed as `trait Foo = where Self: Bar`, which might
// be less readable.
write_where_clause(def_id, f)?;
Ok(())
}
}
impl HirDisplay for TypeAlias {
fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> {
write_visibility(self.module(f.db).id, self.visibility(f.db), f)?;