crate module: Item,
crate externs: Vec<ExternalCrate>,
crate primitives: ThinVec<(DefId, PrimitiveType)>,
- // These are later on moved into `CACHEKEY`, leaving the map empty.
- // Only here so that they can be filtered through the rustdoc passes.
+ /// Only here so that they can be filtered through the rustdoc passes.
crate external_traits: Rc<RefCell<FxHashMap<DefId, TraitWithExtraInfo>>>,
crate collapsed: bool,
}
let path = external_path(cx, did, false, vec![], empty);
inline::record_extern_fqn(cx, did, ItemType::Trait);
GenericBound::TraitBound(
- PolyTrait { trait_: ResolvedPath { path, did }, generic_params: Vec::new() },
+ PolyTrait { trait_: path, generic_params: Vec::new() },
hir::TraitBoundModifier::Maybe,
)
}
crate fn is_sized_bound(&self, cx: &DocContext<'_>) -> bool {
use rustc_hir::TraitBoundModifier as TBM;
if let GenericBound::TraitBound(PolyTrait { ref trait_, .. }, TBM::None) = *self {
- if trait_.def_id() == cx.tcx.lang_items().sized_trait() {
+ if Some(trait_.def_id()) == cx.tcx.lang_items().sized_trait() {
return true;
}
}
None
}
- crate fn get_trait_type(&self) -> Option<Type> {
+ crate fn get_trait_path(&self) -> Option<Path> {
if let GenericBound::TraitBound(PolyTrait { ref trait_, .. }, _) = *self {
Some(trait_.clone())
} else {
/// A trait reference, which may have higher ranked lifetimes.
#[derive(Clone, PartialEq, Eq, Debug, Hash)]
crate struct PolyTrait {
- crate trait_: Type,
+ crate trait_: Path,
crate generic_params: Vec<GenericParamDef>,
}
-/// A representation of a type suitable for hyperlinking purposes. Ideally, one can get the original
-/// type out of the AST/`TyCtxt` given one of these, if more information is needed. Most
-/// importantly, it does not preserve mutability or boxes.
+/// Rustdoc's representation of types, mostly based on the [`hir::Ty`].
#[derive(Clone, PartialEq, Eq, Debug, Hash)]
crate enum Type {
- /// Structs/enums/traits (most that would be an `hir::TyKind::Path`).
- ResolvedPath {
- path: Path,
- did: DefId,
- },
- /// `dyn for<'a> Trait<'a> + Send + 'static`
+ /// A named type, which could be a trait.
+ ///
+ /// This is mostly Rustdoc's version of [`hir::Path`]. It has to be different because Rustdoc's [`PathSegment`] can contain cleaned generics.
+ ResolvedPath { path: Path, did: DefId },
+ /// A `dyn Trait` object: `dyn for<'a> Trait<'a> + Send + 'static`
DynTrait(Vec<PolyTrait>, Option<Lifetime>),
- /// For parameterized types, so the consumer of the JSON don't go
- /// looking for types which don't exist anywhere.
+ /// A type parameter.
Generic(Symbol),
- /// Primitives are the fixed-size numeric types (plus int/usize/float), char,
- /// arrays, slices, and tuples.
+ /// A primitive (aka, builtin) type.
Primitive(PrimitiveType),
- /// `extern "ABI" fn`
+ /// A function pointer: `extern "ABI" fn(...) -> ...`
BareFunction(Box<BareFunctionDecl>),
+ /// A tuple type: `(i32, &str)`.
Tuple(Vec<Type>),
+ /// A slice type (does *not* include the `&`): `[i32]`
Slice(Box<Type>),
- /// The `String` field is about the size or the constant representing the array's length.
+ /// An array type.
+ ///
+ /// The `String` field is a stringified version of the array's length parameter.
Array(Box<Type>, String),
- Never,
+ /// A raw pointer type: `*const i32`, `*mut i32`
RawPointer(Mutability, Box<Type>),
- BorrowedRef {
- lifetime: Option<Lifetime>,
- mutability: Mutability,
- type_: Box<Type>,
- },
+ /// A reference type: `&i32`, `&'a mut Foo`
+ BorrowedRef { lifetime: Option<Lifetime>, mutability: Mutability, type_: Box<Type> },
- // `<Type as Trait>::Name`
+ /// A qualified path to an associated item: `<Type as Trait>::Name`
QPath {
name: Symbol,
self_type: Box<Type>,
+ /// FIXME: This is a hack that should be removed; see [this discussion][1].
+ ///
+ /// [1]: https://github.com/rust-lang/rust/pull/85479#discussion_r635729093
self_def_id: Option<DefId>,
- trait_: Box<Type>,
+ trait_: Path,
},
- // `_`
+ /// A type that is inferred: `_`
Infer,
- // `impl TraitA + TraitB + ...`
+ /// An `impl Trait`: `impl TraitA + TraitB + ...`
ImplTrait(Vec<GenericBound>),
}
}
RawPointer(..) => Some(PrimitiveType::RawPointer),
BareFunction(..) => Some(PrimitiveType::Fn),
- Never => Some(PrimitiveType::Never),
_ => None,
}
}
}
crate fn generics(&self) -> Option<Vec<&Type>> {
- match *self {
- ResolvedPath { ref path, .. } => path.segments.last().and_then(|seg| {
- if let GenericArgs::AngleBracketed { ref args, .. } = seg.args {
- Some(
- args.iter()
- .filter_map(|arg| match arg {
- GenericArg::Type(ty) => Some(ty),
- _ => None,
- })
- .collect(),
- )
- } else {
- None
- }
- }),
- _ => None,
- }
- }
-
- crate fn bindings(&self) -> Option<&[TypeBinding]> {
- match *self {
- ResolvedPath { ref path, .. } => path.segments.last().and_then(|seg| {
- if let GenericArgs::AngleBracketed { ref bindings, .. } = seg.args {
- Some(&**bindings)
- } else {
- None
- }
- }),
+ match self {
+ ResolvedPath { path, .. } => path.generics(),
_ => None,
}
}
QPath { self_type, trait_, name, .. } => (self_type, trait_, name),
_ => return None,
};
- let trait_did = match **trait_ {
- ResolvedPath { did, .. } => did,
- _ => return None,
- };
- Some((&self_, trait_did, *name))
+ Some((&self_, trait_.def_id(), *name))
}
fn inner_def_id(&self, cache: Option<&Cache>) -> Option<DefId> {
let t: PrimitiveType = match *self {
ResolvedPath { did, .. } => return Some(did),
- DynTrait(ref bounds, _) => return bounds[0].trait_.inner_def_id(cache),
+ DynTrait(ref bounds, _) => return Some(bounds[0].trait_.def_id()),
Primitive(p) => return cache.and_then(|c| c.primitive_locations.get(&p).cloned()),
BorrowedRef { type_: box Generic(..), .. } => PrimitiveType::Reference,
BorrowedRef { ref type_, .. } => return type_.inner_def_id(cache),
}
}
BareFunction(..) => PrimitiveType::Fn,
- Never => PrimitiveType::Never,
Slice(..) => PrimitiveType::Slice,
Array(..) => PrimitiveType::Array,
RawPointer(..) => PrimitiveType::RawPointer,
}
}
-/// N.B. this has to be different from `hir::PrimTy` because it also includes types that aren't
-/// paths, like `Unit`.
+/// A primitive (aka, builtin) type.
+///
+/// This represents things like `i32`, `str`, etc.
+///
+/// N.B. This has to be different from [`hir::PrimTy`] because it also includes types that aren't
+/// paths, like [`Self::Unit`].
#[derive(Clone, PartialEq, Eq, Hash, Copy, Debug)]
crate enum PrimitiveType {
Isize,
#[derive(Clone, PartialEq, Eq, Debug, Hash)]
crate struct Path {
- crate global: bool,
crate res: Res,
crate segments: Vec<PathSegment>,
}
impl Path {
+ crate fn def_id(&self) -> DefId {
+ self.res.def_id()
+ }
+
crate fn last(&self) -> Symbol {
self.segments.last().expect("segments were empty").name
}
}
crate fn whole_name(&self) -> String {
- String::from(if self.global { "::" } else { "" })
- + &self.segments.iter().map(|s| s.name.to_string()).collect::<Vec<_>>().join("::")
+ self.segments.iter().map(|s| s.name.to_string()).intersperse("::".into()).collect()
}
/// Checks if this is a `T::Name` path for an associated type.
_ => false,
}
}
+
+ crate fn generics(&self) -> Option<Vec<&Type>> {
+ self.segments.last().and_then(|seg| {
+ if let GenericArgs::AngleBracketed { ref args, .. } = seg.args {
+ Some(
+ args.iter()
+ .filter_map(|arg| match arg {
+ GenericArg::Type(ty) => Some(ty),
+ _ => None,
+ })
+ .collect(),
+ )
+ } else {
+ None
+ }
+ })
+ }
+
+ crate fn bindings(&self) -> Option<&[TypeBinding]> {
+ self.segments.last().and_then(|seg| {
+ if let GenericArgs::AngleBracketed { ref bindings, .. } = seg.args {
+ Some(&**bindings)
+ } else {
+ None
+ }
+ })
+ }
}
#[derive(Clone, PartialEq, Eq, Debug, Hash)]
crate span: Span,
crate unsafety: hir::Unsafety,
crate generics: Generics,
- crate trait_: Option<Type>,
+ crate trait_: Option<Path>,
crate for_: Type,
crate items: Vec<Item>,
crate negative_polarity: bool,
impl Impl {
crate fn provided_trait_methods(&self, tcx: TyCtxt<'_>) -> FxHashSet<Symbol> {
self.trait_
- .def_id()
+ .as_ref()
+ .map(|t| t.def_id())
.map(|did| tcx.provided_trait_methods(did).map(|meth| meth.ident.name).collect())
.unwrap_or_default()
}
projects / rust.git / blobdiff