diff options
Diffstat (limited to 'src/librustdoc/clean/types.rs')
| -rw-r--r-- | src/librustdoc/clean/types.rs | 156 |
1 files changed, 95 insertions, 61 deletions
diff --git a/src/librustdoc/clean/types.rs b/src/librustdoc/clean/types.rs index cd1f972dc..2590bb0df 100644 --- a/src/librustdoc/clean/types.rs +++ b/src/librustdoc/clean/types.rs @@ -24,7 +24,7 @@ use rustc_hir::{BodyId, Mutability}; use rustc_hir_analysis::check::intrinsic::intrinsic_operation_unsafety; use rustc_index::vec::IndexVec; use rustc_middle::ty::fast_reject::SimplifiedType; -use rustc_middle::ty::{self, TyCtxt}; +use rustc_middle::ty::{self, DefIdTree, TyCtxt, Visibility}; use rustc_session::Session; use rustc_span::hygiene::MacroKind; use rustc_span::source_map::DUMMY_SP; @@ -34,7 +34,6 @@ use rustc_target::abi::VariantIdx; use rustc_target::spec::abi::Abi; use crate::clean::cfg::Cfg; -use crate::clean::clean_visibility; use crate::clean::external_path; use crate::clean::inline::{self, print_inlined_const}; use crate::clean::utils::{is_literal_expr, print_const_expr, print_evaluated_const}; @@ -51,7 +50,6 @@ pub(crate) use self::Type::{ Array, BareFunction, BorrowedRef, DynTrait, Generic, ImplTrait, Infer, Primitive, QPath, RawPointer, Slice, Tuple, }; -pub(crate) use self::Visibility::{Inherited, Public}; #[cfg(test)] mod tests; @@ -117,7 +115,6 @@ impl From<DefId> for ItemId { #[derive(Clone, Debug)] pub(crate) struct Crate { pub(crate) module: Item, - pub(crate) primitives: ThinVec<(DefId, PrimitiveType)>, /// Only here so that they can be filtered through the rustdoc passes. pub(crate) external_traits: Rc<RefCell<FxHashMap<DefId, Trait>>>, } @@ -245,7 +242,9 @@ impl ExternalCrate { hir::ItemKind::Use(path, hir::UseKind::Single) if tcx.visibility(id.owner_id).is_public() => { - as_keyword(path.res.expect_non_local()) + path.res + .iter() + .find_map(|res| as_keyword(res.expect_non_local())) .map(|(_, prim)| (id.owner_id.to_def_id(), prim)) } _ => None, @@ -313,10 +312,11 @@ impl ExternalCrate { hir::ItemKind::Use(path, hir::UseKind::Single) if tcx.visibility(id.owner_id).is_public() => { - as_primitive(path.res.expect_non_local()).map(|(_, prim)| { + path.res + .iter() + .find_map(|res| as_primitive(res.expect_non_local())) // Pretend the primitive is local. - (id.owner_id.to_def_id(), prim) - }) + .map(|(_, prim)| (id.owner_id.to_def_id(), prim)) } _ => None, } @@ -348,12 +348,12 @@ pub(crate) struct Item { /// Optional because not every item has a name, e.g. impls. pub(crate) name: Option<Symbol>, pub(crate) attrs: Box<Attributes>, - pub(crate) visibility: Visibility, /// Information about this item that is specific to what kind of item it is. /// E.g., struct vs enum vs function. pub(crate) kind: Box<ItemKind>, pub(crate) item_id: ItemId, - + /// This is the `DefId` of the `use` statement if the item was inlined. + pub(crate) inline_stmt_id: Option<DefId>, pub(crate) cfg: Option<Arc<Cfg>>, } @@ -364,9 +364,7 @@ impl fmt::Debug for Item { let alternate = f.alternate(); // hand-picked fields that don't bloat the logs too much let mut fmt = f.debug_struct("Item"); - fmt.field("name", &self.name) - .field("visibility", &self.visibility) - .field("item_id", &self.item_id); + fmt.field("name", &self.name).field("item_id", &self.item_id); // allow printing the full item if someone really wants to if alternate { fmt.field("attrs", &self.attrs).field("kind", &self.kind).field("cfg", &self.cfg); @@ -388,6 +386,15 @@ pub(crate) fn rustc_span(def_id: DefId, tcx: TyCtxt<'_>) -> Span { )) } +fn is_field_vis_inherited(tcx: TyCtxt<'_>, def_id: DefId) -> bool { + let parent = tcx.parent(def_id); + match tcx.def_kind(parent) { + DefKind::Struct | DefKind::Union => false, + DefKind::Variant => true, + parent_kind => panic!("unexpected parent kind: {:?}", parent_kind), + } +} + impl Item { pub(crate) fn stability<'tcx>(&self, tcx: TyCtxt<'tcx>) -> Option<Stability> { self.item_id.as_def_id().and_then(|did| tcx.lookup_stability(did)) @@ -462,7 +469,6 @@ impl Item { name, kind, Box::new(Attributes::from_ast(ast_attrs)), - cx, ast_attrs.cfg(cx.tcx, &cx.cache.hidden_cfg), ) } @@ -472,21 +478,18 @@ impl Item { name: Option<Symbol>, kind: ItemKind, attrs: Box<Attributes>, - cx: &mut DocContext<'_>, cfg: Option<Arc<Cfg>>, ) -> Item { trace!("name={:?}, def_id={:?} cfg={:?}", name, def_id, cfg); - // Primitives and Keywords are written in the source code as private modules. - // The modules need to be private so that nobody actually uses them, but the - // keywords and primitives that they are documenting are public. - let visibility = if matches!(&kind, ItemKind::KeywordItem | ItemKind::PrimitiveItem(..)) { - Visibility::Public - } else { - clean_visibility(cx.tcx.visibility(def_id)) - }; - - Item { item_id: def_id.into(), kind: Box::new(kind), name, attrs, visibility, cfg } + Item { + item_id: def_id.into(), + kind: Box::new(kind), + name, + attrs, + cfg, + inline_stmt_id: None, + } } /// Finds all `doc` attributes as NameValues and returns their corresponding values, joined @@ -691,17 +694,61 @@ impl Item { asyncness: hir::IsAsync::NotAsync, } } - ItemKind::FunctionItem(_) | ItemKind::MethodItem(_, _) => { + ItemKind::FunctionItem(_) | ItemKind::MethodItem(_, _) | ItemKind::TyMethodItem(_) => { let def_id = self.item_id.as_def_id().unwrap(); build_fn_header(def_id, tcx, tcx.asyncness(def_id)) } - ItemKind::TyMethodItem(_) => { - build_fn_header(self.item_id.as_def_id().unwrap(), tcx, hir::IsAsync::NotAsync) - } _ => return None, }; Some(header) } + + /// Returns the visibility of the current item. If the visibility is "inherited", then `None` + /// is returned. + pub(crate) fn visibility(&self, tcx: TyCtxt<'_>) -> Option<Visibility<DefId>> { + let def_id = match self.item_id { + // Anything but DefId *shouldn't* matter, but return a reasonable value anyway. + ItemId::Auto { .. } | ItemId::Blanket { .. } => return None, + // Primitives and Keywords are written in the source code as private modules. + // The modules need to be private so that nobody actually uses them, but the + // keywords and primitives that they are documenting are public. + ItemId::Primitive(..) => return Some(Visibility::Public), + ItemId::DefId(def_id) => def_id, + }; + + match *self.kind { + // Explication on `ItemId::Primitive` just above. + ItemKind::KeywordItem | ItemKind::PrimitiveItem(_) => return Some(Visibility::Public), + // Variant fields inherit their enum's visibility. + StructFieldItem(..) if is_field_vis_inherited(tcx, def_id) => { + return None; + } + // Variants always inherit visibility + VariantItem(..) => return None, + // Trait items inherit the trait's visibility + AssocConstItem(..) | TyAssocConstItem(..) | AssocTypeItem(..) | TyAssocTypeItem(..) + | TyMethodItem(..) | MethodItem(..) => { + let assoc_item = tcx.associated_item(def_id); + let is_trait_item = match assoc_item.container { + ty::TraitContainer => true, + ty::ImplContainer => { + // Trait impl items always inherit the impl's visibility -- + // we don't want to show `pub`. + tcx.impl_trait_ref(tcx.parent(assoc_item.def_id)).is_some() + } + }; + if is_trait_item { + return None; + } + } + _ => {} + } + let def_id = match self.inline_stmt_id { + Some(inlined) => inlined, + None => def_id, + }; + Some(tcx.visibility(def_id)) + } } #[derive(Clone, Debug)] @@ -747,7 +794,7 @@ pub(crate) enum ItemKind { /// A required associated type in a trait declaration. /// /// The bounds may be non-empty if there is a `where` clause. - TyAssocTypeItem(Box<Generics>, Vec<GenericBound>), + TyAssocTypeItem(Generics, Vec<GenericBound>), /// An associated type in a trait impl or a provided one in a trait declaration. AssocTypeItem(Box<Typedef>, Vec<GenericBound>), /// An item that has been stripped by a rustdoc pass @@ -1261,7 +1308,7 @@ impl Attributes { for attr in self.other_attrs.lists(sym::doc).filter(|a| a.has_name(sym::alias)) { if let Some(values) = attr.meta_item_list() { for l in values { - match l.literal().unwrap().kind { + match l.lit().unwrap().kind { ast::LitKind::Str(s, _) => { aliases.insert(s); } @@ -1392,6 +1439,10 @@ pub(crate) struct GenericParamDef { } impl GenericParamDef { + pub(crate) fn lifetime(name: Symbol) -> Self { + Self { name, kind: GenericParamDefKind::Lifetime { outlives: Vec::new() } } + } + pub(crate) fn is_synthetic_type_param(&self) -> bool { match self.kind { GenericParamDefKind::Lifetime { .. } | GenericParamDefKind::Const { .. } => false, @@ -1414,8 +1465,8 @@ impl GenericParamDef { // maybe use a Generic enum and use Vec<Generic>? #[derive(Clone, Debug, Default)] pub(crate) struct Generics { - pub(crate) params: Vec<GenericParamDef>, - pub(crate) where_predicates: Vec<WherePredicate>, + pub(crate) params: ThinVec<GenericParamDef>, + pub(crate) where_predicates: ThinVec<WherePredicate>, } impl Generics { @@ -1576,7 +1627,7 @@ pub(crate) enum Type { /// An array type. /// /// The `String` field is a stringified version of the array's length parameter. - Array(Box<Type>, String), + Array(Box<Type>, Box<str>), /// A raw pointer type: `*const i32`, `*mut i32` RawPointer(Mutability, Box<Type>), /// A reference type: `&i32`, `&'a mut Foo` @@ -2030,27 +2081,9 @@ impl From<hir::PrimTy> for PrimitiveType { } } -#[derive(Copy, Clone, Debug)] -pub(crate) enum Visibility { - /// `pub` - Public, - /// Visibility inherited from parent. - /// - /// For example, this is the visibility of private items and of enum variants. - Inherited, - /// `pub(crate)`, `pub(super)`, or `pub(in path::to::somewhere)` - Restricted(DefId), -} - -impl Visibility { - pub(crate) fn is_public(&self) -> bool { - matches!(self, Visibility::Public) - } -} - #[derive(Clone, Debug)] pub(crate) struct Struct { - pub(crate) struct_type: CtorKind, + pub(crate) ctor_kind: Option<CtorKind>, pub(crate) generics: Generics, pub(crate) fields: Vec<Item>, } @@ -2078,7 +2111,7 @@ impl Union { /// only as a variant in an enum. #[derive(Clone, Debug)] pub(crate) struct VariantStruct { - pub(crate) struct_type: CtorKind, + pub(crate) ctor_kind: Option<CtorKind>, pub(crate) fields: Vec<Item>, } @@ -2179,7 +2212,7 @@ impl Span { #[derive(Clone, PartialEq, Eq, Debug, Hash)] pub(crate) struct Path { pub(crate) res: Res, - pub(crate) segments: Vec<PathSegment>, + pub(crate) segments: ThinVec<PathSegment>, } impl Path { @@ -2329,7 +2362,7 @@ pub(crate) enum ConstantKind { /// /// Note that `ty::Const` includes generic parameters, and may not always be uniquely identified /// by a DefId. So this field must be different from `Extern`. - TyConst { expr: String }, + TyConst { expr: Box<str> }, /// A constant (expression) that's not an item or associated item. These are usually found /// nested inside types (e.g., array lengths) or expressions (e.g., repeat counts), and also /// used to define explicit discriminant values for enum variants. @@ -2357,7 +2390,7 @@ impl Constant { impl ConstantKind { pub(crate) fn expr(&self, tcx: TyCtxt<'_>) -> String { match *self { - ConstantKind::TyConst { ref expr } => expr.clone(), + ConstantKind::TyConst { ref expr } => expr.to_string(), ConstantKind::Extern { def_id } => print_inlined_const(tcx, def_id), ConstantKind::Local { body, .. } | ConstantKind::Anonymous { body } => { print_const_expr(tcx, body) @@ -2541,14 +2574,15 @@ mod size_asserts { use super::*; use rustc_data_structures::static_assert_size; // tidy-alphabetical-start - static_assert_size!(Crate, 72); // frequently moved by-value + static_assert_size!(Crate, 64); // frequently moved by-value static_assert_size!(DocFragment, 32); - static_assert_size!(GenericArg, 48); + static_assert_size!(GenericArg, 32); static_assert_size!(GenericArgs, 32); static_assert_size!(GenericParamDef, 56); + static_assert_size!(Generics, 16); static_assert_size!(Item, 56); - static_assert_size!(ItemKind, 88); + static_assert_size!(ItemKind, 64); static_assert_size!(PathSegment, 40); - static_assert_size!(Type, 48); + static_assert_size!(Type, 32); // tidy-alphabetical-end } |