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