| //! HirDisplay implementations for various hir types. |
| use hir_def::{ |
| data::adt::{StructKind, VariantData}, |
| generics::{ |
| TypeOrConstParamData, TypeParamProvenance, WherePredicate, WherePredicateTypeTarget, |
| }, |
| lang_item::LangItem, |
| type_ref::{TypeBound, TypeRef}, |
| AdtId, GenericDefId, |
| }; |
| use hir_ty::{ |
| display::{ |
| write_bounds_like_dyn_trait_with_prefix, write_visibility, HirDisplay, HirDisplayError, |
| HirFormatter, SizedByDefault, |
| }, |
| Interner, TraitRefExt, WhereClause, |
| }; |
| |
| use crate::{ |
| Adt, AsAssocItem, AssocItem, AssocItemContainer, Const, ConstParam, Enum, ExternCrateDecl, |
| Field, Function, GenericParam, HasCrate, HasVisibility, LifetimeParam, Macro, Module, |
| SelfParam, Static, Struct, Trait, TraitAlias, TupleField, TyBuilder, Type, TypeAlias, |
| TypeOrConstParam, TypeParam, Union, Variant, |
| }; |
| |
| impl HirDisplay for Function { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| let db = f.db; |
| let data = db.function_data(self.id); |
| let container = self.as_assoc_item(db).map(|it| it.container(db)); |
| let mut module = self.module(db); |
| if let Some(AssocItemContainer::Impl(_)) = container { |
| // Block-local impls are "hoisted" to the nearest (non-block) module. |
| module = module.nearest_non_block_module(db); |
| } |
| let module_id = module.id; |
| write_visibility(module_id, self.visibility(db), f)?; |
| if data.has_default_kw() { |
| f.write_str("default ")?; |
| } |
| if data.has_const_kw() { |
| f.write_str("const ")?; |
| } |
| if data.has_async_kw() { |
| f.write_str("async ")?; |
| } |
| if self.is_unsafe_to_call(db) { |
| f.write_str("unsafe ")?; |
| } |
| if let Some(abi) = &data.abi { |
| // FIXME: String escape? |
| write!(f, "extern \"{}\" ", &**abi)?; |
| } |
| write!(f, "fn {}", data.name.display(f.db.upcast()))?; |
| |
| write_generic_params(GenericDefId::FunctionId(self.id), f)?; |
| |
| f.write_char('(')?; |
| |
| let mut first = true; |
| let mut skip_self = 0; |
| if let Some(self_param) = self.self_param(db) { |
| self_param.hir_fmt(f)?; |
| first = false; |
| skip_self = 1; |
| } |
| |
| // FIXME: Use resolved `param.ty` once we no longer discard lifetimes |
| for (type_ref, param) in data.params.iter().zip(self.assoc_fn_params(db)).skip(skip_self) { |
| let local = param.as_local(db).map(|it| it.name(db)); |
| if !first { |
| f.write_str(", ")?; |
| } else { |
| first = false; |
| } |
| match local { |
| Some(name) => write!(f, "{}: ", name.display(f.db.upcast()))?, |
| None => f.write_str("_: ")?, |
| } |
| type_ref.hir_fmt(f)?; |
| } |
| |
| if data.is_varargs() { |
| f.write_str(", ...")?; |
| } |
| |
| f.write_char(')')?; |
| |
| // `FunctionData::ret_type` will be `::core::future::Future<Output = ...>` for async fns. |
| // Use ugly pattern match to strip the Future trait. |
| // Better way? |
| let ret_type = if !data.has_async_kw() { |
| &data.ret_type |
| } else { |
| match &*data.ret_type { |
| TypeRef::ImplTrait(bounds) => match bounds[0].as_ref() { |
| TypeBound::Path(path, _) => { |
| path.segments().iter().last().unwrap().args_and_bindings.unwrap().bindings |
| [0] |
| .type_ref |
| .as_ref() |
| .unwrap() |
| } |
| _ => panic!("Async fn ret_type should be impl Future"), |
| }, |
| _ => panic!("Async fn ret_type should be impl Future"), |
| } |
| }; |
| |
| match ret_type { |
| TypeRef::Tuple(tup) if tup.is_empty() => {} |
| ty => { |
| f.write_str(" -> ")?; |
| ty.hir_fmt(f)?; |
| } |
| } |
| |
| write_where_clause(GenericDefId::FunctionId(self.id), f)?; |
| |
| Ok(()) |
| } |
| } |
| |
| impl HirDisplay for SelfParam { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| let data = f.db.function_data(self.func); |
| let param = data.params.first().unwrap(); |
| match &**param { |
| TypeRef::Path(p) if p.is_self_type() => f.write_str("self"), |
| TypeRef::Reference(inner, lifetime, mut_) if matches!(&**inner, TypeRef::Path(p) if p.is_self_type()) => |
| { |
| f.write_char('&')?; |
| if let Some(lifetime) = lifetime { |
| write!(f, "{} ", lifetime.name.display(f.db.upcast()))?; |
| } |
| if let hir_def::type_ref::Mutability::Mut = mut_ { |
| f.write_str("mut ")?; |
| } |
| f.write_str("self") |
| } |
| ty => { |
| f.write_str("self: ")?; |
| ty.hir_fmt(f) |
| } |
| } |
| } |
| } |
| |
| impl HirDisplay for Adt { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| match self { |
| Adt::Struct(it) => it.hir_fmt(f), |
| Adt::Union(it) => it.hir_fmt(f), |
| Adt::Enum(it) => it.hir_fmt(f), |
| } |
| } |
| } |
| |
| impl HirDisplay for Struct { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| let module_id = self.module(f.db).id; |
| // FIXME: Render repr if its set explicitly? |
| write_visibility(module_id, self.visibility(f.db), f)?; |
| f.write_str("struct ")?; |
| write!(f, "{}", self.name(f.db).display(f.db.upcast()))?; |
| let def_id = GenericDefId::AdtId(AdtId::StructId(self.id)); |
| write_generic_params(def_id, f)?; |
| |
| let variant_data = self.variant_data(f.db); |
| match variant_data.kind() { |
| StructKind::Tuple => { |
| f.write_char('(')?; |
| let mut it = variant_data.fields().iter().peekable(); |
| |
| while let Some((id, _)) = it.next() { |
| let field = Field { parent: (*self).into(), id }; |
| write_visibility(module_id, field.visibility(f.db), f)?; |
| field.ty(f.db).hir_fmt(f)?; |
| if it.peek().is_some() { |
| f.write_str(", ")?; |
| } |
| } |
| |
| f.write_char(')')?; |
| write_where_clause(def_id, f)?; |
| } |
| StructKind::Record => { |
| let has_where_clause = write_where_clause(def_id, f)?; |
| if let Some(limit) = f.entity_limit { |
| let fields = self.fields(f.db); |
| let count = fields.len().min(limit); |
| f.write_char(if !has_where_clause { ' ' } else { '\n' })?; |
| if count == 0 { |
| if fields.is_empty() { |
| f.write_str("{}")?; |
| } else { |
| f.write_str("{ /* … */ }")?; |
| } |
| } else { |
| f.write_str(" {\n")?; |
| for field in &fields[..count] { |
| f.write_str(" ")?; |
| field.hir_fmt(f)?; |
| f.write_str(",\n")?; |
| } |
| |
| if fields.len() > count { |
| f.write_str(" /* … */\n")?; |
| } |
| f.write_str("}")?; |
| } |
| } |
| } |
| StructKind::Unit => _ = write_where_clause(def_id, f)?, |
| } |
| |
| Ok(()) |
| } |
| } |
| |
| impl HirDisplay for Enum { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| write_visibility(self.module(f.db).id, self.visibility(f.db), f)?; |
| f.write_str("enum ")?; |
| write!(f, "{}", self.name(f.db).display(f.db.upcast()))?; |
| let def_id = GenericDefId::AdtId(AdtId::EnumId(self.id)); |
| write_generic_params(def_id, f)?; |
| let has_where_clause = write_where_clause(def_id, f)?; |
| |
| let variants = self.variants(f.db); |
| if !variants.is_empty() { |
| f.write_char(if !has_where_clause { ' ' } else { '\n' })?; |
| f.write_str("{\n")?; |
| for variant in variants { |
| f.write_str(" ")?; |
| variant.hir_fmt(f)?; |
| f.write_str(",\n")?; |
| } |
| f.write_str("}")?; |
| } |
| |
| Ok(()) |
| } |
| } |
| |
| impl HirDisplay for Union { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| write_visibility(self.module(f.db).id, self.visibility(f.db), f)?; |
| f.write_str("union ")?; |
| write!(f, "{}", self.name(f.db).display(f.db.upcast()))?; |
| let def_id = GenericDefId::AdtId(AdtId::UnionId(self.id)); |
| write_generic_params(def_id, f)?; |
| let has_where_clause = write_where_clause(def_id, f)?; |
| |
| let fields = self.fields(f.db); |
| if !fields.is_empty() { |
| f.write_char(if !has_where_clause { ' ' } else { '\n' })?; |
| f.write_str("{\n")?; |
| for field in self.fields(f.db) { |
| f.write_str(" ")?; |
| field.hir_fmt(f)?; |
| f.write_str(",\n")?; |
| } |
| f.write_str("}")?; |
| } |
| |
| Ok(()) |
| } |
| } |
| |
| impl HirDisplay for Field { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| write_visibility(self.parent.module(f.db).id, self.visibility(f.db), f)?; |
| write!(f, "{}: ", self.name(f.db).display(f.db.upcast()))?; |
| self.ty(f.db).hir_fmt(f) |
| } |
| } |
| |
| impl HirDisplay for TupleField { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| write!(f, "pub {}: ", self.name().display(f.db.upcast()))?; |
| self.ty(f.db).hir_fmt(f) |
| } |
| } |
| |
| impl HirDisplay for Variant { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| write!(f, "{}", self.name(f.db).display(f.db.upcast()))?; |
| let data = self.variant_data(f.db); |
| match &*data { |
| VariantData::Unit => {} |
| VariantData::Tuple(fields) => { |
| f.write_char('(')?; |
| let mut first = true; |
| for (_, field) in fields.iter() { |
| if first { |
| first = false; |
| } else { |
| f.write_str(", ")?; |
| } |
| // Enum variant fields must be pub. |
| field.type_ref.hir_fmt(f)?; |
| } |
| f.write_char(')')?; |
| } |
| VariantData::Record(fields) => { |
| f.write_str(" {")?; |
| let mut first = true; |
| for (_, field) in fields.iter() { |
| if first { |
| first = false; |
| f.write_char(' ')?; |
| } else { |
| f.write_str(", ")?; |
| } |
| // Enum variant fields must be pub. |
| write!(f, "{}: ", field.name.display(f.db.upcast()))?; |
| field.type_ref.hir_fmt(f)?; |
| } |
| f.write_str(" }")?; |
| } |
| } |
| Ok(()) |
| } |
| } |
| |
| impl HirDisplay for Type { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| self.ty.hir_fmt(f) |
| } |
| } |
| |
| impl HirDisplay for ExternCrateDecl { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| write_visibility(self.module(f.db).id, self.visibility(f.db), f)?; |
| f.write_str("extern crate ")?; |
| write!(f, "{}", self.name(f.db).display(f.db.upcast()))?; |
| if let Some(alias) = self.alias(f.db) { |
| write!(f, " as {alias}",)?; |
| } |
| Ok(()) |
| } |
| } |
| |
| impl HirDisplay for GenericParam { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| match self { |
| GenericParam::TypeParam(it) => it.hir_fmt(f), |
| GenericParam::ConstParam(it) => it.hir_fmt(f), |
| GenericParam::LifetimeParam(it) => it.hir_fmt(f), |
| } |
| } |
| } |
| |
| impl HirDisplay for TypeOrConstParam { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| match self.split(f.db) { |
| either::Either::Left(it) => it.hir_fmt(f), |
| either::Either::Right(it) => it.hir_fmt(f), |
| } |
| } |
| } |
| |
| impl HirDisplay for TypeParam { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| write!(f, "{}", self.name(f.db).display(f.db.upcast()))?; |
| if f.omit_verbose_types() { |
| return Ok(()); |
| } |
| |
| let bounds = f.db.generic_predicates_for_param(self.id.parent(), self.id.into(), None); |
| let substs = TyBuilder::placeholder_subst(f.db, self.id.parent()); |
| let predicates: Vec<_> = |
| bounds.iter().cloned().map(|b| b.substitute(Interner, &substs)).collect(); |
| let krate = self.id.parent().krate(f.db).id; |
| let sized_trait = |
| f.db.lang_item(krate, LangItem::Sized).and_then(|lang_item| lang_item.as_trait()); |
| let has_only_sized_bound = predicates.iter().all(move |pred| match pred.skip_binders() { |
| WhereClause::Implemented(it) => Some(it.hir_trait_id()) == sized_trait, |
| _ => false, |
| }); |
| let has_only_not_sized_bound = predicates.is_empty(); |
| if !has_only_sized_bound || has_only_not_sized_bound { |
| let default_sized = SizedByDefault::Sized { anchor: krate }; |
| write_bounds_like_dyn_trait_with_prefix(f, ":", &predicates, default_sized)?; |
| } |
| Ok(()) |
| } |
| } |
| |
| impl HirDisplay for LifetimeParam { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| write!(f, "{}", self.name(f.db).display(f.db.upcast())) |
| } |
| } |
| |
| impl HirDisplay for ConstParam { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| write!(f, "const {}: ", self.name(f.db).display(f.db.upcast()))?; |
| self.ty(f.db).hir_fmt(f) |
| } |
| } |
| |
| fn write_generic_params( |
| def: GenericDefId, |
| f: &mut HirFormatter<'_>, |
| ) -> Result<(), HirDisplayError> { |
| let params = f.db.generic_params(def); |
| if params.lifetimes.is_empty() |
| && params.type_or_consts.iter().all(|it| it.1.const_param().is_none()) |
| && params |
| .type_or_consts |
| .iter() |
| .filter_map(|it| it.1.type_param()) |
| .all(|param| !matches!(param.provenance, TypeParamProvenance::TypeParamList)) |
| { |
| return Ok(()); |
| } |
| f.write_char('<')?; |
| |
| let mut first = true; |
| let mut delim = |f: &mut HirFormatter<'_>| { |
| if first { |
| first = false; |
| Ok(()) |
| } else { |
| f.write_str(", ") |
| } |
| }; |
| for (_, lifetime) in params.lifetimes.iter() { |
| delim(f)?; |
| write!(f, "{}", lifetime.name.display(f.db.upcast()))?; |
| } |
| for (_, ty) in params.type_or_consts.iter() { |
| if let Some(name) = &ty.name() { |
| match ty { |
| TypeOrConstParamData::TypeParamData(ty) => { |
| if ty.provenance != TypeParamProvenance::TypeParamList { |
| continue; |
| } |
| delim(f)?; |
| write!(f, "{}", name.display(f.db.upcast()))?; |
| if let Some(default) = &ty.default { |
| f.write_str(" = ")?; |
| default.hir_fmt(f)?; |
| } |
| } |
| TypeOrConstParamData::ConstParamData(c) => { |
| delim(f)?; |
| write!(f, "const {}: ", name.display(f.db.upcast()))?; |
| c.ty.hir_fmt(f)?; |
| |
| if let Some(default) = &c.default { |
| f.write_str(" = ")?; |
| write!(f, "{}", default.display(f.db.upcast()))?; |
| } |
| } |
| } |
| } |
| } |
| |
| f.write_char('>')?; |
| Ok(()) |
| } |
| |
| fn write_where_clause( |
| def: GenericDefId, |
| f: &mut HirFormatter<'_>, |
| ) -> Result<bool, HirDisplayError> { |
| let params = f.db.generic_params(def); |
| |
| // unnamed type targets are displayed inline with the argument itself, e.g. `f: impl Y`. |
| let is_unnamed_type_target = |target: &WherePredicateTypeTarget| match target { |
| WherePredicateTypeTarget::TypeRef(_) => false, |
| WherePredicateTypeTarget::TypeOrConstParam(id) => { |
| params.type_or_consts[*id].name().is_none() |
| } |
| }; |
| |
| let has_displayable_predicate = params |
| .where_predicates |
| .iter() |
| .any(|pred| { |
| !matches!(pred, WherePredicate::TypeBound { target, .. } if is_unnamed_type_target(target)) |
| }); |
| |
| if !has_displayable_predicate { |
| return Ok(false); |
| } |
| |
| let write_target = |target: &WherePredicateTypeTarget, f: &mut HirFormatter<'_>| match target { |
| WherePredicateTypeTarget::TypeRef(ty) => ty.hir_fmt(f), |
| WherePredicateTypeTarget::TypeOrConstParam(id) => { |
| match ¶ms.type_or_consts[*id].name() { |
| Some(name) => write!(f, "{}", name.display(f.db.upcast())), |
| None => f.write_str("{unnamed}"), |
| } |
| } |
| }; |
| |
| f.write_str("\nwhere")?; |
| |
| for (pred_idx, pred) in params.where_predicates.iter().enumerate() { |
| let prev_pred = |
| if pred_idx == 0 { None } else { Some(¶ms.where_predicates[pred_idx - 1]) }; |
| |
| let new_predicate = |f: &mut HirFormatter<'_>| { |
| f.write_str(if pred_idx == 0 { "\n " } else { ",\n " }) |
| }; |
| |
| match pred { |
| WherePredicate::TypeBound { target, .. } if is_unnamed_type_target(target) => {} |
| WherePredicate::TypeBound { target, bound } => { |
| if matches!(prev_pred, Some(WherePredicate::TypeBound { target: target_, .. }) if target_ == target) |
| { |
| f.write_str(" + ")?; |
| } else { |
| new_predicate(f)?; |
| write_target(target, f)?; |
| f.write_str(": ")?; |
| } |
| bound.hir_fmt(f)?; |
| } |
| WherePredicate::Lifetime { target, bound } => { |
| if matches!(prev_pred, Some(WherePredicate::Lifetime { target: target_, .. }) if target_ == target) |
| { |
| write!(f, " + {}", bound.name.display(f.db.upcast()))?; |
| } else { |
| new_predicate(f)?; |
| write!( |
| f, |
| "{}: {}", |
| target.name.display(f.db.upcast()), |
| bound.name.display(f.db.upcast()) |
| )?; |
| } |
| } |
| WherePredicate::ForLifetime { lifetimes, target, bound } => { |
| if matches!( |
| prev_pred, |
| Some(WherePredicate::ForLifetime { lifetimes: lifetimes_, target: target_, .. }) |
| if lifetimes_ == lifetimes && target_ == target, |
| ) { |
| f.write_str(" + ")?; |
| } else { |
| new_predicate(f)?; |
| f.write_str("for<")?; |
| for (idx, lifetime) in lifetimes.iter().enumerate() { |
| if idx != 0 { |
| f.write_str(", ")?; |
| } |
| write!(f, "{}", lifetime.display(f.db.upcast()))?; |
| } |
| f.write_str("> ")?; |
| write_target(target, f)?; |
| f.write_str(": ")?; |
| } |
| bound.hir_fmt(f)?; |
| } |
| } |
| } |
| |
| // End of final predicate. There must be at least one predicate here. |
| f.write_char(',')?; |
| |
| Ok(true) |
| } |
| |
| impl HirDisplay for Const { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| let db = f.db; |
| let container = self.as_assoc_item(db).map(|it| it.container(db)); |
| let mut module = self.module(db); |
| if let Some(AssocItemContainer::Impl(_)) = container { |
| // Block-local impls are "hoisted" to the nearest (non-block) module. |
| module = module.nearest_non_block_module(db); |
| } |
| write_visibility(module.id, self.visibility(db), f)?; |
| let data = db.const_data(self.id); |
| f.write_str("const ")?; |
| match &data.name { |
| Some(name) => write!(f, "{}: ", name.display(f.db.upcast()))?, |
| None => f.write_str("_: ")?, |
| } |
| data.type_ref.hir_fmt(f)?; |
| Ok(()) |
| } |
| } |
| |
| impl HirDisplay for Static { |
| 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.static_data(self.id); |
| f.write_str("static ")?; |
| if data.mutable { |
| f.write_str("mut ")?; |
| } |
| write!(f, "{}: ", data.name.display(f.db.upcast()))?; |
| data.type_ref.hir_fmt(f)?; |
| Ok(()) |
| } |
| } |
| |
| impl HirDisplay for Trait { |
| 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_data(self.id); |
| if data.is_unsafe { |
| f.write_str("unsafe ")?; |
| } |
| if data.is_auto { |
| f.write_str("auto ")?; |
| } |
| write!(f, "trait {}", data.name.display(f.db.upcast()))?; |
| let def_id = GenericDefId::TraitId(self.id); |
| write_generic_params(def_id, f)?; |
| let has_where_clause = write_where_clause(def_id, f)?; |
| |
| if let Some(limit) = f.entity_limit { |
| let assoc_items = self.items(f.db); |
| let count = assoc_items.len().min(limit); |
| f.write_char(if !has_where_clause { ' ' } else { '\n' })?; |
| if count == 0 { |
| if assoc_items.is_empty() { |
| f.write_str("{}")?; |
| } else { |
| f.write_str("{ /* … */ }")?; |
| } |
| } else { |
| f.write_str("{\n")?; |
| for item in &assoc_items[..count] { |
| f.write_str(" ")?; |
| match item { |
| AssocItem::Function(func) => func.hir_fmt(f), |
| AssocItem::Const(cst) => cst.hir_fmt(f), |
| AssocItem::TypeAlias(type_alias) => type_alias.hir_fmt(f), |
| }?; |
| f.write_str(";\n")?; |
| } |
| |
| if assoc_items.len() > count { |
| f.write_str(" /* … */\n")?; |
| } |
| f.write_str("}")?; |
| } |
| } |
| |
| Ok(()) |
| } |
| } |
| |
| 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.display(f.db.upcast()))?; |
| 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)?; |
| let data = f.db.type_alias_data(self.id); |
| write!(f, "type {}", data.name.display(f.db.upcast()))?; |
| let def_id = GenericDefId::TypeAliasId(self.id); |
| write_generic_params(def_id, f)?; |
| if !data.bounds.is_empty() { |
| f.write_str(": ")?; |
| f.write_joined(data.bounds.iter(), " + ")?; |
| } |
| if let Some(ty) = &data.type_ref { |
| f.write_str(" = ")?; |
| ty.hir_fmt(f)?; |
| } |
| write_where_clause(def_id, f)?; |
| Ok(()) |
| } |
| } |
| |
| impl HirDisplay for Module { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| // FIXME: Module doesn't have visibility saved in data. |
| match self.name(f.db) { |
| Some(name) => write!(f, "mod {}", name.display(f.db.upcast())), |
| None if self.is_crate_root() => match self.krate(f.db).display_name(f.db) { |
| Some(name) => write!(f, "extern crate {name}"), |
| None => f.write_str("extern crate {unknown}"), |
| }, |
| None => f.write_str("mod {unnamed}"), |
| } |
| } |
| } |
| |
| impl HirDisplay for Macro { |
| fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> { |
| match self.id { |
| hir_def::MacroId::Macro2Id(_) => f.write_str("macro"), |
| hir_def::MacroId::MacroRulesId(_) => f.write_str("macro_rules!"), |
| hir_def::MacroId::ProcMacroId(_) => f.write_str("proc_macro"), |
| }?; |
| write!(f, " {}", self.name(f.db).display(f.db.upcast())) |
| } |
| } |