| //! These from impls are used to create the JSON types which get serialized. They're very close to |
| //! the `clean` types but with some fields removed or stringified to simplify the output and not |
| //! expose unstable compiler internals. |
| |
| use rustc_abi::ExternAbi; |
| use rustc_ast::ast; |
| use rustc_hir as hir; |
| use rustc_hir::attrs::{self, DeprecatedSince}; |
| use rustc_hir::def::CtorKind; |
| use rustc_hir::def_id::DefId; |
| use rustc_hir::{HeaderSafety, Safety}; |
| use rustc_metadata::rendered_const; |
| use rustc_middle::ty::TyCtxt; |
| use rustc_middle::{bug, ty}; |
| use rustc_span::{Pos, kw, sym}; |
| use rustdoc_json_types::*; |
| use thin_vec::ThinVec; |
| |
| use crate::clean::{self, ItemId}; |
| use crate::formats::item_type::ItemType; |
| use crate::json::JsonRenderer; |
| use crate::passes::collect_intra_doc_links::UrlFragment; |
| |
| impl JsonRenderer<'_> { |
| pub(super) fn convert_item(&self, item: &clean::Item) -> Option<Item> { |
| let deprecation = item.deprecation(self.tcx); |
| let links = self |
| .cache |
| .intra_doc_links |
| .get(&item.item_id) |
| .into_iter() |
| .flatten() |
| .map(|clean::ItemLink { link, page_id, fragment, .. }| { |
| let id = match fragment { |
| Some(UrlFragment::Item(frag_id)) => *frag_id, |
| // FIXME: Pass the `UserWritten` segment to JSON consumer. |
| Some(UrlFragment::UserWritten(_)) | None => *page_id, |
| }; |
| |
| (String::from(&**link), self.id_from_item_default(id.into())) |
| }) |
| .collect(); |
| let docs = item.opt_doc_value(); |
| let attrs = item |
| .attrs |
| .other_attrs |
| .iter() |
| .filter_map(|a| maybe_from_hir_attr(a, item.item_id, self.tcx)) |
| .collect(); |
| let span = item.span(self.tcx); |
| let visibility = item.visibility(self.tcx); |
| let clean::ItemInner { name, item_id, .. } = *item.inner; |
| let id = self.id_from_item(item); |
| let inner = match item.kind { |
| clean::KeywordItem => return None, |
| clean::StrippedItem(ref inner) => { |
| match &**inner { |
| // We document stripped modules as with `Module::is_stripped` set to |
| // `true`, to prevent contained items from being orphaned for downstream users, |
| // as JSON does no inlining. |
| clean::ModuleItem(_) |
| if self.imported_items.contains(&item_id.expect_def_id()) => |
| { |
| from_clean_item(item, self) |
| } |
| _ => return None, |
| } |
| } |
| _ => from_clean_item(item, self), |
| }; |
| Some(Item { |
| id, |
| crate_id: item_id.krate().as_u32(), |
| name: name.map(|sym| sym.to_string()), |
| span: span.and_then(|span| span.into_json(self)), |
| visibility: visibility.into_json(self), |
| docs, |
| attrs, |
| deprecation: deprecation.into_json(self), |
| inner, |
| links, |
| }) |
| } |
| |
| fn ids(&self, items: &[clean::Item]) -> Vec<Id> { |
| items |
| .iter() |
| .filter(|i| !i.is_stripped() && !i.is_keyword()) |
| .map(|i| self.id_from_item(i)) |
| .collect() |
| } |
| |
| fn ids_keeping_stripped(&self, items: &[clean::Item]) -> Vec<Option<Id>> { |
| items |
| .iter() |
| .map(|i| (!i.is_stripped() && !i.is_keyword()).then(|| self.id_from_item(i))) |
| .collect() |
| } |
| } |
| |
| pub(crate) trait FromClean<T> { |
| fn from_clean(f: &T, renderer: &JsonRenderer<'_>) -> Self; |
| } |
| |
| pub(crate) trait IntoJson<T> { |
| fn into_json(&self, renderer: &JsonRenderer<'_>) -> T; |
| } |
| |
| impl<T, U> IntoJson<U> for T |
| where |
| U: FromClean<T>, |
| { |
| fn into_json(&self, renderer: &JsonRenderer<'_>) -> U { |
| U::from_clean(self, renderer) |
| } |
| } |
| |
| impl<T, U> FromClean<Box<T>> for U |
| where |
| U: FromClean<T>, |
| { |
| fn from_clean(opt: &Box<T>, renderer: &JsonRenderer<'_>) -> Self { |
| opt.as_ref().into_json(renderer) |
| } |
| } |
| |
| impl<T, U> FromClean<Option<T>> for Option<U> |
| where |
| U: FromClean<T>, |
| { |
| fn from_clean(opt: &Option<T>, renderer: &JsonRenderer<'_>) -> Self { |
| opt.as_ref().map(|x| x.into_json(renderer)) |
| } |
| } |
| |
| impl<T, U> FromClean<Vec<T>> for Vec<U> |
| where |
| U: FromClean<T>, |
| { |
| fn from_clean(items: &Vec<T>, renderer: &JsonRenderer<'_>) -> Self { |
| items.iter().map(|i| i.into_json(renderer)).collect() |
| } |
| } |
| |
| impl<T, U> FromClean<ThinVec<T>> for Vec<U> |
| where |
| U: FromClean<T>, |
| { |
| fn from_clean(items: &ThinVec<T>, renderer: &JsonRenderer<'_>) -> Self { |
| items.iter().map(|i| i.into_json(renderer)).collect() |
| } |
| } |
| |
| impl FromClean<clean::Span> for Option<Span> { |
| fn from_clean(span: &clean::Span, renderer: &JsonRenderer<'_>) -> Self { |
| match span.filename(renderer.sess()) { |
| rustc_span::FileName::Real(name) => { |
| if let Some(local_path) = name.into_local_path() { |
| let hi = span.hi(renderer.sess()); |
| let lo = span.lo(renderer.sess()); |
| Some(Span { |
| filename: local_path, |
| begin: (lo.line, lo.col.to_usize() + 1), |
| end: (hi.line, hi.col.to_usize() + 1), |
| }) |
| } else { |
| None |
| } |
| } |
| _ => None, |
| } |
| } |
| } |
| |
| impl FromClean<Option<ty::Visibility<DefId>>> for Visibility { |
| fn from_clean(v: &Option<ty::Visibility<DefId>>, renderer: &JsonRenderer<'_>) -> Self { |
| match v { |
| None => Visibility::Default, |
| Some(ty::Visibility::Public) => Visibility::Public, |
| Some(ty::Visibility::Restricted(did)) if did.is_crate_root() => Visibility::Crate, |
| Some(ty::Visibility::Restricted(did)) => Visibility::Restricted { |
| parent: renderer.id_from_item_default((*did).into()), |
| path: renderer.tcx.def_path(*did).to_string_no_crate_verbose(), |
| }, |
| } |
| } |
| } |
| |
| impl FromClean<attrs::Deprecation> for Deprecation { |
| fn from_clean(deprecation: &attrs::Deprecation, _renderer: &JsonRenderer<'_>) -> Self { |
| let attrs::Deprecation { since, note, suggestion: _ } = deprecation; |
| let since = match since { |
| DeprecatedSince::RustcVersion(version) => Some(version.to_string()), |
| DeprecatedSince::Future => Some("TBD".to_string()), |
| DeprecatedSince::NonStandard(since) => Some(since.to_string()), |
| DeprecatedSince::Unspecified | DeprecatedSince::Err => None, |
| }; |
| Deprecation { since, note: note.map(|sym| sym.to_string()) } |
| } |
| } |
| |
| impl FromClean<clean::GenericArgs> for Option<Box<GenericArgs>> { |
| fn from_clean(generic_args: &clean::GenericArgs, renderer: &JsonRenderer<'_>) -> Self { |
| use clean::GenericArgs::*; |
| match generic_args { |
| AngleBracketed { args, constraints } => { |
| if generic_args.is_empty() { |
| None |
| } else { |
| Some(Box::new(GenericArgs::AngleBracketed { |
| args: args.into_json(renderer), |
| constraints: constraints.into_json(renderer), |
| })) |
| } |
| } |
| Parenthesized { inputs, output } => Some(Box::new(GenericArgs::Parenthesized { |
| inputs: inputs.into_json(renderer), |
| output: output.into_json(renderer), |
| })), |
| ReturnTypeNotation => Some(Box::new(GenericArgs::ReturnTypeNotation)), |
| } |
| } |
| } |
| |
| impl FromClean<clean::GenericArg> for GenericArg { |
| fn from_clean(arg: &clean::GenericArg, renderer: &JsonRenderer<'_>) -> Self { |
| use clean::GenericArg::*; |
| match arg { |
| Lifetime(l) => GenericArg::Lifetime(l.into_json(renderer)), |
| Type(t) => GenericArg::Type(t.into_json(renderer)), |
| Const(box c) => GenericArg::Const(c.into_json(renderer)), |
| Infer => GenericArg::Infer, |
| } |
| } |
| } |
| |
| impl FromClean<clean::ConstantKind> for Constant { |
| // FIXME(generic_const_items): Add support for generic const items. |
| fn from_clean(constant: &clean::ConstantKind, renderer: &JsonRenderer<'_>) -> Self { |
| let tcx = renderer.tcx; |
| let expr = constant.expr(tcx); |
| let value = constant.value(tcx); |
| let is_literal = constant.is_literal(tcx); |
| Constant { expr, value, is_literal } |
| } |
| } |
| |
| impl FromClean<clean::AssocItemConstraint> for AssocItemConstraint { |
| fn from_clean(constraint: &clean::AssocItemConstraint, renderer: &JsonRenderer<'_>) -> Self { |
| AssocItemConstraint { |
| name: constraint.assoc.name.to_string(), |
| args: constraint.assoc.args.into_json(renderer), |
| binding: constraint.kind.into_json(renderer), |
| } |
| } |
| } |
| |
| impl FromClean<clean::AssocItemConstraintKind> for AssocItemConstraintKind { |
| fn from_clean(kind: &clean::AssocItemConstraintKind, renderer: &JsonRenderer<'_>) -> Self { |
| use clean::AssocItemConstraintKind::*; |
| match kind { |
| Equality { term } => AssocItemConstraintKind::Equality(term.into_json(renderer)), |
| Bound { bounds } => AssocItemConstraintKind::Constraint(bounds.into_json(renderer)), |
| } |
| } |
| } |
| |
| fn from_clean_item(item: &clean::Item, renderer: &JsonRenderer<'_>) -> ItemEnum { |
| use clean::ItemKind::*; |
| let name = item.name; |
| let is_crate = item.is_crate(); |
| let header = item.fn_header(renderer.tcx); |
| |
| match &item.inner.kind { |
| ModuleItem(m) => { |
| ItemEnum::Module(Module { is_crate, items: renderer.ids(&m.items), is_stripped: false }) |
| } |
| ImportItem(i) => ItemEnum::Use(i.into_json(renderer)), |
| StructItem(s) => ItemEnum::Struct(s.into_json(renderer)), |
| UnionItem(u) => ItemEnum::Union(u.into_json(renderer)), |
| StructFieldItem(f) => ItemEnum::StructField(f.into_json(renderer)), |
| EnumItem(e) => ItemEnum::Enum(e.into_json(renderer)), |
| VariantItem(v) => ItemEnum::Variant(v.into_json(renderer)), |
| FunctionItem(f) => { |
| ItemEnum::Function(from_clean_function(f, true, header.unwrap(), renderer)) |
| } |
| ForeignFunctionItem(f, _) => { |
| ItemEnum::Function(from_clean_function(f, false, header.unwrap(), renderer)) |
| } |
| TraitItem(t) => ItemEnum::Trait(t.into_json(renderer)), |
| TraitAliasItem(t) => ItemEnum::TraitAlias(t.into_json(renderer)), |
| MethodItem(m, _) => { |
| ItemEnum::Function(from_clean_function(m, true, header.unwrap(), renderer)) |
| } |
| RequiredMethodItem(m) => { |
| ItemEnum::Function(from_clean_function(m, false, header.unwrap(), renderer)) |
| } |
| ImplItem(i) => ItemEnum::Impl(i.into_json(renderer)), |
| StaticItem(s) => ItemEnum::Static(from_clean_static(s, rustc_hir::Safety::Safe, renderer)), |
| ForeignStaticItem(s, safety) => ItemEnum::Static(from_clean_static(s, *safety, renderer)), |
| ForeignTypeItem => ItemEnum::ExternType, |
| TypeAliasItem(t) => ItemEnum::TypeAlias(t.into_json(renderer)), |
| // FIXME(generic_const_items): Add support for generic free consts |
| ConstantItem(ci) => ItemEnum::Constant { |
| type_: ci.type_.into_json(renderer), |
| const_: ci.kind.into_json(renderer), |
| }, |
| MacroItem(m) => ItemEnum::Macro(m.source.clone()), |
| ProcMacroItem(m) => ItemEnum::ProcMacro(m.into_json(renderer)), |
| PrimitiveItem(p) => { |
| ItemEnum::Primitive(Primitive { |
| name: p.as_sym().to_string(), |
| impls: Vec::new(), // Added in JsonRenderer::item |
| }) |
| } |
| // FIXME(generic_const_items): Add support for generic associated consts. |
| RequiredAssocConstItem(_generics, ty) => { |
| ItemEnum::AssocConst { type_: ty.into_json(renderer), value: None } |
| } |
| // FIXME(generic_const_items): Add support for generic associated consts. |
| ProvidedAssocConstItem(ci) | ImplAssocConstItem(ci) => ItemEnum::AssocConst { |
| type_: ci.type_.into_json(renderer), |
| value: Some(ci.kind.expr(renderer.tcx)), |
| }, |
| RequiredAssocTypeItem(g, b) => ItemEnum::AssocType { |
| generics: g.into_json(renderer), |
| bounds: b.into_json(renderer), |
| type_: None, |
| }, |
| AssocTypeItem(t, b) => ItemEnum::AssocType { |
| generics: t.generics.into_json(renderer), |
| bounds: b.into_json(renderer), |
| type_: Some(t.item_type.as_ref().unwrap_or(&t.type_).into_json(renderer)), |
| }, |
| // `convert_item` early returns `None` for stripped items and keywords. |
| KeywordItem => unreachable!(), |
| StrippedItem(inner) => { |
| match inner.as_ref() { |
| ModuleItem(m) => ItemEnum::Module(Module { |
| is_crate, |
| items: renderer.ids(&m.items), |
| is_stripped: true, |
| }), |
| // `convert_item` early returns `None` for stripped items we're not including |
| _ => unreachable!(), |
| } |
| } |
| ExternCrateItem { src } => ItemEnum::ExternCrate { |
| name: name.as_ref().unwrap().to_string(), |
| rename: src.map(|x| x.to_string()), |
| }, |
| } |
| } |
| |
| impl FromClean<clean::Struct> for Struct { |
| fn from_clean(struct_: &clean::Struct, renderer: &JsonRenderer<'_>) -> Self { |
| let has_stripped_fields = struct_.has_stripped_entries(); |
| let clean::Struct { ctor_kind, generics, fields } = struct_; |
| |
| let kind = match ctor_kind { |
| Some(CtorKind::Fn) => StructKind::Tuple(renderer.ids_keeping_stripped(fields)), |
| Some(CtorKind::Const) => { |
| assert!(fields.is_empty()); |
| StructKind::Unit |
| } |
| None => StructKind::Plain { fields: renderer.ids(fields), has_stripped_fields }, |
| }; |
| |
| Struct { |
| kind, |
| generics: generics.into_json(renderer), |
| impls: Vec::new(), // Added in JsonRenderer::item |
| } |
| } |
| } |
| |
| impl FromClean<clean::Union> for Union { |
| fn from_clean(union_: &clean::Union, renderer: &JsonRenderer<'_>) -> Self { |
| let has_stripped_fields = union_.has_stripped_entries(); |
| let clean::Union { generics, fields } = union_; |
| Union { |
| generics: generics.into_json(renderer), |
| has_stripped_fields, |
| fields: renderer.ids(fields), |
| impls: Vec::new(), // Added in JsonRenderer::item |
| } |
| } |
| } |
| |
| impl FromClean<rustc_hir::FnHeader> for FunctionHeader { |
| fn from_clean(header: &rustc_hir::FnHeader, renderer: &JsonRenderer<'_>) -> Self { |
| let is_unsafe = match header.safety { |
| HeaderSafety::SafeTargetFeatures => { |
| // The type system's internal implementation details consider |
| // safe functions with the `#[target_feature]` attribute to be analogous |
| // to unsafe functions: `header.is_unsafe()` returns `true` for them. |
| // For rustdoc, this isn't the right decision, so we explicitly return `false`. |
| // Context: https://github.com/rust-lang/rust/issues/142655 |
| false |
| } |
| HeaderSafety::Normal(Safety::Safe) => false, |
| HeaderSafety::Normal(Safety::Unsafe) => true, |
| }; |
| FunctionHeader { |
| is_async: header.is_async(), |
| is_const: header.is_const(), |
| is_unsafe, |
| abi: header.abi.into_json(renderer), |
| } |
| } |
| } |
| |
| impl FromClean<ExternAbi> for Abi { |
| fn from_clean(a: &ExternAbi, _renderer: &JsonRenderer<'_>) -> Self { |
| match *a { |
| ExternAbi::Rust => Abi::Rust, |
| ExternAbi::C { unwind } => Abi::C { unwind }, |
| ExternAbi::Cdecl { unwind } => Abi::Cdecl { unwind }, |
| ExternAbi::Stdcall { unwind } => Abi::Stdcall { unwind }, |
| ExternAbi::Fastcall { unwind } => Abi::Fastcall { unwind }, |
| ExternAbi::Aapcs { unwind } => Abi::Aapcs { unwind }, |
| ExternAbi::Win64 { unwind } => Abi::Win64 { unwind }, |
| ExternAbi::SysV64 { unwind } => Abi::SysV64 { unwind }, |
| ExternAbi::System { unwind } => Abi::System { unwind }, |
| _ => Abi::Other(a.to_string()), |
| } |
| } |
| } |
| |
| impl FromClean<clean::Lifetime> for String { |
| fn from_clean(l: &clean::Lifetime, _renderer: &JsonRenderer<'_>) -> String { |
| l.0.to_string() |
| } |
| } |
| |
| impl FromClean<clean::Generics> for Generics { |
| fn from_clean(generics: &clean::Generics, renderer: &JsonRenderer<'_>) -> Self { |
| Generics { |
| params: generics.params.into_json(renderer), |
| where_predicates: generics.where_predicates.into_json(renderer), |
| } |
| } |
| } |
| |
| impl FromClean<clean::GenericParamDef> for GenericParamDef { |
| fn from_clean(generic_param: &clean::GenericParamDef, renderer: &JsonRenderer<'_>) -> Self { |
| GenericParamDef { |
| name: generic_param.name.to_string(), |
| kind: generic_param.kind.into_json(renderer), |
| } |
| } |
| } |
| |
| impl FromClean<clean::GenericParamDefKind> for GenericParamDefKind { |
| fn from_clean(kind: &clean::GenericParamDefKind, renderer: &JsonRenderer<'_>) -> Self { |
| use clean::GenericParamDefKind::*; |
| match kind { |
| Lifetime { outlives } => { |
| GenericParamDefKind::Lifetime { outlives: outlives.into_json(renderer) } |
| } |
| Type { bounds, default, synthetic } => GenericParamDefKind::Type { |
| bounds: bounds.into_json(renderer), |
| default: default.into_json(renderer), |
| is_synthetic: *synthetic, |
| }, |
| Const { ty, default, synthetic: _ } => GenericParamDefKind::Const { |
| type_: ty.into_json(renderer), |
| default: default.as_ref().map(|x| x.as_ref().clone()), |
| }, |
| } |
| } |
| } |
| |
| impl FromClean<clean::WherePredicate> for WherePredicate { |
| fn from_clean(predicate: &clean::WherePredicate, renderer: &JsonRenderer<'_>) -> Self { |
| use clean::WherePredicate::*; |
| match predicate { |
| BoundPredicate { ty, bounds, bound_params } => WherePredicate::BoundPredicate { |
| type_: ty.into_json(renderer), |
| bounds: bounds.into_json(renderer), |
| generic_params: bound_params.into_json(renderer), |
| }, |
| RegionPredicate { lifetime, bounds } => WherePredicate::LifetimePredicate { |
| lifetime: lifetime.into_json(renderer), |
| outlives: bounds |
| .iter() |
| .map(|bound| match bound { |
| clean::GenericBound::Outlives(lt) => lt.into_json(renderer), |
| _ => bug!("found non-outlives-bound on lifetime predicate"), |
| }) |
| .collect(), |
| }, |
| EqPredicate { lhs, rhs } => WherePredicate::EqPredicate { |
| // The LHS currently has type `Type` but it should be a `QualifiedPath` since it may |
| // refer to an associated const. However, `EqPredicate` shouldn't exist in the first |
| // place: <https://github.com/rust-lang/rust/141368>. |
| lhs: lhs.into_json(renderer), |
| rhs: rhs.into_json(renderer), |
| }, |
| } |
| } |
| } |
| |
| impl FromClean<clean::GenericBound> for GenericBound { |
| fn from_clean(bound: &clean::GenericBound, renderer: &JsonRenderer<'_>) -> Self { |
| use clean::GenericBound::*; |
| match bound { |
| TraitBound(clean::PolyTrait { trait_, generic_params }, modifier) => { |
| GenericBound::TraitBound { |
| trait_: trait_.into_json(renderer), |
| generic_params: generic_params.into_json(renderer), |
| modifier: modifier.into_json(renderer), |
| } |
| } |
| Outlives(lifetime) => GenericBound::Outlives(lifetime.into_json(renderer)), |
| Use(args) => GenericBound::Use( |
| args.iter() |
| .map(|arg| match arg { |
| clean::PreciseCapturingArg::Lifetime(lt) => { |
| PreciseCapturingArg::Lifetime(lt.into_json(renderer)) |
| } |
| clean::PreciseCapturingArg::Param(param) => { |
| PreciseCapturingArg::Param(param.to_string()) |
| } |
| }) |
| .collect(), |
| ), |
| } |
| } |
| } |
| |
| impl FromClean<rustc_hir::TraitBoundModifiers> for TraitBoundModifier { |
| fn from_clean( |
| modifiers: &rustc_hir::TraitBoundModifiers, |
| _renderer: &JsonRenderer<'_>, |
| ) -> Self { |
| use rustc_hir as hir; |
| let hir::TraitBoundModifiers { constness, polarity } = modifiers; |
| match (constness, polarity) { |
| (hir::BoundConstness::Never, hir::BoundPolarity::Positive) => TraitBoundModifier::None, |
| (hir::BoundConstness::Never, hir::BoundPolarity::Maybe(_)) => TraitBoundModifier::Maybe, |
| (hir::BoundConstness::Maybe(_), hir::BoundPolarity::Positive) => { |
| TraitBoundModifier::MaybeConst |
| } |
| // FIXME: Fill out the rest of this matrix. |
| _ => TraitBoundModifier::None, |
| } |
| } |
| } |
| |
| impl FromClean<clean::Type> for Type { |
| fn from_clean(ty: &clean::Type, renderer: &JsonRenderer<'_>) -> Self { |
| use clean::Type::{ |
| Array, BareFunction, BorrowedRef, Generic, ImplTrait, Infer, Primitive, QPath, |
| RawPointer, SelfTy, Slice, Tuple, UnsafeBinder, |
| }; |
| |
| match ty { |
| clean::Type::Path { path } => Type::ResolvedPath(path.into_json(renderer)), |
| clean::Type::DynTrait(bounds, lt) => Type::DynTrait(DynTrait { |
| lifetime: lt.into_json(renderer), |
| traits: bounds.into_json(renderer), |
| }), |
| Generic(s) => Type::Generic(s.to_string()), |
| // FIXME: add dedicated variant to json Type? |
| SelfTy => Type::Generic("Self".to_owned()), |
| Primitive(p) => Type::Primitive(p.as_sym().to_string()), |
| BareFunction(f) => Type::FunctionPointer(Box::new(f.into_json(renderer))), |
| Tuple(t) => Type::Tuple(t.into_json(renderer)), |
| Slice(t) => Type::Slice(Box::new(t.into_json(renderer))), |
| Array(t, s) => { |
| Type::Array { type_: Box::new(t.into_json(renderer)), len: s.to_string() } |
| } |
| clean::Type::Pat(t, p) => Type::Pat { |
| type_: Box::new(t.into_json(renderer)), |
| __pat_unstable_do_not_use: p.to_string(), |
| }, |
| ImplTrait(g) => Type::ImplTrait(g.into_json(renderer)), |
| Infer => Type::Infer, |
| RawPointer(mutability, type_) => Type::RawPointer { |
| is_mutable: *mutability == ast::Mutability::Mut, |
| type_: Box::new(type_.into_json(renderer)), |
| }, |
| BorrowedRef { lifetime, mutability, type_ } => Type::BorrowedRef { |
| lifetime: lifetime.into_json(renderer), |
| is_mutable: *mutability == ast::Mutability::Mut, |
| type_: Box::new(type_.into_json(renderer)), |
| }, |
| QPath(qpath) => qpath.into_json(renderer), |
| // FIXME(unsafe_binder): Implement rustdoc-json. |
| UnsafeBinder(_) => todo!(), |
| } |
| } |
| } |
| |
| impl FromClean<clean::Path> for Path { |
| fn from_clean(path: &clean::Path, renderer: &JsonRenderer<'_>) -> Self { |
| Path { |
| path: path.whole_name(), |
| id: renderer.id_from_item_default(path.def_id().into()), |
| args: { |
| if let Some((final_seg, rest_segs)) = path.segments.split_last() { |
| // In general, `clean::Path` can hold things like |
| // `std::vec::Vec::<u32>::new`, where generic args appear |
| // in a middle segment. But for the places where `Path` is |
| // used by rustdoc-json-types, generic args can only be |
| // used in the final segment, e.g. `std::vec::Vec<u32>`. So |
| // check that the non-final segments have no generic args. |
| assert!(rest_segs.iter().all(|seg| seg.args.is_empty())); |
| final_seg.args.into_json(renderer) |
| } else { |
| None // no generics on any segments because there are no segments |
| } |
| }, |
| } |
| } |
| } |
| |
| impl FromClean<clean::QPathData> for Type { |
| fn from_clean(qpath: &clean::QPathData, renderer: &JsonRenderer<'_>) -> Self { |
| let clean::QPathData { assoc, self_type, should_fully_qualify: _, trait_ } = qpath; |
| |
| Self::QualifiedPath { |
| name: assoc.name.to_string(), |
| args: assoc.args.into_json(renderer), |
| self_type: Box::new(self_type.into_json(renderer)), |
| trait_: trait_.into_json(renderer), |
| } |
| } |
| } |
| |
| impl FromClean<clean::Term> for Term { |
| fn from_clean(term: &clean::Term, renderer: &JsonRenderer<'_>) -> Self { |
| match term { |
| clean::Term::Type(ty) => Term::Type(ty.into_json(renderer)), |
| clean::Term::Constant(c) => Term::Constant(c.into_json(renderer)), |
| } |
| } |
| } |
| |
| impl FromClean<clean::BareFunctionDecl> for FunctionPointer { |
| fn from_clean(bare_decl: &clean::BareFunctionDecl, renderer: &JsonRenderer<'_>) -> Self { |
| let clean::BareFunctionDecl { safety, generic_params, decl, abi } = bare_decl; |
| FunctionPointer { |
| header: FunctionHeader { |
| is_unsafe: safety.is_unsafe(), |
| is_const: false, |
| is_async: false, |
| abi: abi.into_json(renderer), |
| }, |
| generic_params: generic_params.into_json(renderer), |
| sig: decl.into_json(renderer), |
| } |
| } |
| } |
| |
| impl FromClean<clean::FnDecl> for FunctionSignature { |
| fn from_clean(decl: &clean::FnDecl, renderer: &JsonRenderer<'_>) -> Self { |
| let clean::FnDecl { inputs, output, c_variadic } = decl; |
| FunctionSignature { |
| inputs: inputs |
| .iter() |
| .map(|param| { |
| // `_` is the most sensible name for missing param names. |
| let name = param.name.unwrap_or(kw::Underscore).to_string(); |
| let type_ = param.type_.into_json(renderer); |
| (name, type_) |
| }) |
| .collect(), |
| output: if output.is_unit() { None } else { Some(output.into_json(renderer)) }, |
| is_c_variadic: *c_variadic, |
| } |
| } |
| } |
| |
| impl FromClean<clean::Trait> for Trait { |
| fn from_clean(trait_: &clean::Trait, renderer: &JsonRenderer<'_>) -> Self { |
| let tcx = renderer.tcx; |
| let is_auto = trait_.is_auto(tcx); |
| let is_unsafe = trait_.safety(tcx).is_unsafe(); |
| let is_dyn_compatible = trait_.is_dyn_compatible(tcx); |
| let clean::Trait { items, generics, bounds, .. } = trait_; |
| Trait { |
| is_auto, |
| is_unsafe, |
| is_dyn_compatible, |
| items: renderer.ids(items), |
| generics: generics.into_json(renderer), |
| bounds: bounds.into_json(renderer), |
| implementations: Vec::new(), // Added in JsonRenderer::item |
| } |
| } |
| } |
| |
| impl FromClean<clean::PolyTrait> for PolyTrait { |
| fn from_clean( |
| clean::PolyTrait { trait_, generic_params }: &clean::PolyTrait, |
| renderer: &JsonRenderer<'_>, |
| ) -> Self { |
| PolyTrait { |
| trait_: trait_.into_json(renderer), |
| generic_params: generic_params.into_json(renderer), |
| } |
| } |
| } |
| |
| impl FromClean<clean::Impl> for Impl { |
| fn from_clean(impl_: &clean::Impl, renderer: &JsonRenderer<'_>) -> Self { |
| let provided_trait_methods = impl_.provided_trait_methods(renderer.tcx); |
| let clean::Impl { safety, generics, trait_, for_, items, polarity, kind } = impl_; |
| // FIXME: use something like ImplKind in JSON? |
| let (is_synthetic, blanket_impl) = match kind { |
| clean::ImplKind::Normal | clean::ImplKind::FakeVariadic => (false, None), |
| clean::ImplKind::Auto => (true, None), |
| clean::ImplKind::Blanket(ty) => (false, Some(ty)), |
| }; |
| let is_negative = match polarity { |
| ty::ImplPolarity::Positive | ty::ImplPolarity::Reservation => false, |
| ty::ImplPolarity::Negative => true, |
| }; |
| Impl { |
| is_unsafe: safety.is_unsafe(), |
| generics: generics.into_json(renderer), |
| provided_trait_methods: provided_trait_methods |
| .into_iter() |
| .map(|x| x.to_string()) |
| .collect(), |
| trait_: trait_.into_json(renderer), |
| for_: for_.into_json(renderer), |
| items: renderer.ids(items), |
| is_negative, |
| is_synthetic, |
| blanket_impl: blanket_impl.map(|x| x.into_json(renderer)), |
| } |
| } |
| } |
| |
| pub(crate) fn from_clean_function( |
| clean::Function { decl, generics }: &clean::Function, |
| has_body: bool, |
| header: rustc_hir::FnHeader, |
| renderer: &JsonRenderer<'_>, |
| ) -> Function { |
| Function { |
| sig: decl.into_json(renderer), |
| generics: generics.into_json(renderer), |
| header: header.into_json(renderer), |
| has_body, |
| } |
| } |
| |
| impl FromClean<clean::Enum> for Enum { |
| fn from_clean(enum_: &clean::Enum, renderer: &JsonRenderer<'_>) -> Self { |
| let has_stripped_variants = enum_.has_stripped_entries(); |
| let clean::Enum { variants, generics } = enum_; |
| Enum { |
| generics: generics.into_json(renderer), |
| has_stripped_variants, |
| variants: renderer.ids(&variants.as_slice().raw), |
| impls: Vec::new(), // Added in JsonRenderer::item |
| } |
| } |
| } |
| |
| impl FromClean<clean::Variant> for Variant { |
| fn from_clean(variant: &clean::Variant, renderer: &JsonRenderer<'_>) -> Self { |
| use clean::VariantKind::*; |
| |
| let discriminant = variant.discriminant.into_json(renderer); |
| |
| let kind = match &variant.kind { |
| CLike => VariantKind::Plain, |
| Tuple(fields) => VariantKind::Tuple(renderer.ids_keeping_stripped(fields)), |
| Struct(s) => VariantKind::Struct { |
| has_stripped_fields: s.has_stripped_entries(), |
| fields: renderer.ids(&s.fields), |
| }, |
| }; |
| |
| Variant { kind, discriminant } |
| } |
| } |
| |
| impl FromClean<clean::Discriminant> for Discriminant { |
| fn from_clean(disr: &clean::Discriminant, renderer: &JsonRenderer<'_>) -> Self { |
| let tcx = renderer.tcx; |
| Discriminant { |
| // expr is only none if going through the inlining path, which gets |
| // `rustc_middle` types, not `rustc_hir`, but because JSON never inlines |
| // the expr is always some. |
| expr: disr.expr(tcx).unwrap(), |
| value: disr.value(tcx, false), |
| } |
| } |
| } |
| |
| impl FromClean<clean::Import> for Use { |
| fn from_clean(import: &clean::Import, renderer: &JsonRenderer<'_>) -> Self { |
| use clean::ImportKind::*; |
| let (name, is_glob) = match import.kind { |
| Simple(s) => (s.to_string(), false), |
| Glob => (import.source.path.last_opt().unwrap_or(sym::asterisk).to_string(), true), |
| }; |
| Use { |
| source: import.source.path.whole_name(), |
| name, |
| id: import.source.did.map(ItemId::from).map(|i| renderer.id_from_item_default(i)), |
| is_glob, |
| } |
| } |
| } |
| |
| impl FromClean<clean::ProcMacro> for ProcMacro { |
| fn from_clean(mac: &clean::ProcMacro, renderer: &JsonRenderer<'_>) -> Self { |
| ProcMacro { |
| kind: mac.kind.into_json(renderer), |
| helpers: mac.helpers.iter().map(|x| x.to_string()).collect(), |
| } |
| } |
| } |
| |
| impl FromClean<rustc_span::hygiene::MacroKind> for MacroKind { |
| fn from_clean(kind: &rustc_span::hygiene::MacroKind, _renderer: &JsonRenderer<'_>) -> Self { |
| use rustc_span::hygiene::MacroKind::*; |
| match kind { |
| Bang => MacroKind::Bang, |
| Attr => MacroKind::Attr, |
| Derive => MacroKind::Derive, |
| } |
| } |
| } |
| |
| impl FromClean<clean::TypeAlias> for TypeAlias { |
| fn from_clean(type_alias: &clean::TypeAlias, renderer: &JsonRenderer<'_>) -> Self { |
| let clean::TypeAlias { type_, generics, item_type: _, inner_type: _ } = type_alias; |
| TypeAlias { type_: type_.into_json(renderer), generics: generics.into_json(renderer) } |
| } |
| } |
| |
| fn from_clean_static( |
| stat: &clean::Static, |
| safety: rustc_hir::Safety, |
| renderer: &JsonRenderer<'_>, |
| ) -> Static { |
| let tcx = renderer.tcx; |
| Static { |
| type_: stat.type_.as_ref().into_json(renderer), |
| is_mutable: stat.mutability == ast::Mutability::Mut, |
| is_unsafe: safety.is_unsafe(), |
| expr: stat |
| .expr |
| .map(|e| rendered_const(tcx, tcx.hir_body(e), tcx.hir_body_owner_def_id(e))) |
| .unwrap_or_default(), |
| } |
| } |
| |
| impl FromClean<clean::TraitAlias> for TraitAlias { |
| fn from_clean(alias: &clean::TraitAlias, renderer: &JsonRenderer<'_>) -> Self { |
| TraitAlias { |
| generics: alias.generics.into_json(renderer), |
| params: alias.bounds.into_json(renderer), |
| } |
| } |
| } |
| |
| impl FromClean<ItemType> for ItemKind { |
| fn from_clean(kind: &ItemType, _renderer: &JsonRenderer<'_>) -> Self { |
| use ItemType::*; |
| match kind { |
| Module => ItemKind::Module, |
| ExternCrate => ItemKind::ExternCrate, |
| Import => ItemKind::Use, |
| Struct => ItemKind::Struct, |
| Union => ItemKind::Union, |
| Enum => ItemKind::Enum, |
| Function | TyMethod | Method => ItemKind::Function, |
| TypeAlias => ItemKind::TypeAlias, |
| Static => ItemKind::Static, |
| Constant => ItemKind::Constant, |
| Trait => ItemKind::Trait, |
| Impl => ItemKind::Impl, |
| StructField => ItemKind::StructField, |
| Variant => ItemKind::Variant, |
| Macro => ItemKind::Macro, |
| Primitive => ItemKind::Primitive, |
| AssocConst => ItemKind::AssocConst, |
| AssocType => ItemKind::AssocType, |
| ForeignType => ItemKind::ExternType, |
| Keyword => ItemKind::Keyword, |
| TraitAlias => ItemKind::TraitAlias, |
| ProcAttribute => ItemKind::ProcAttribute, |
| ProcDerive => ItemKind::ProcDerive, |
| } |
| } |
| } |
| |
| /// Maybe convert a attribute from hir to json. |
| /// |
| /// Returns `None` if the attribute shouldn't be in the output. |
| fn maybe_from_hir_attr( |
| attr: &hir::Attribute, |
| item_id: ItemId, |
| tcx: TyCtxt<'_>, |
| ) -> Option<Attribute> { |
| use attrs::AttributeKind as AK; |
| |
| let kind = match attr { |
| hir::Attribute::Parsed(kind) => kind, |
| |
| hir::Attribute::Unparsed(_) => { |
| return Some(if attr.has_name(sym::macro_export) { |
| Attribute::MacroExport |
| // FIXME: We should handle `#[doc(hidden)]`. |
| } else { |
| other_attr(tcx, attr) |
| }); |
| } |
| }; |
| |
| Some(match kind { |
| AK::Deprecation { .. } => return None, // Handled separately into Item::deprecation. |
| AK::DocComment { .. } => unreachable!("doc comments stripped out earlier"), |
| |
| AK::MustUse { reason, span: _ } => { |
| Attribute::MustUse { reason: reason.map(|s| s.to_string()) } |
| } |
| AK::Repr { .. } => repr_attr( |
| tcx, |
| item_id.as_def_id().expect("all items that could have #[repr] have a DefId"), |
| ), |
| AK::ExportName { name, span: _ } => Attribute::ExportName(name.to_string()), |
| AK::LinkSection { name, span: _ } => Attribute::LinkSection(name.to_string()), |
| AK::TargetFeature(features, _span) => Attribute::TargetFeature { |
| enable: features.iter().map(|(feat, _span)| feat.to_string()).collect(), |
| }, |
| |
| AK::NoMangle(_) => Attribute::NoMangle, |
| AK::NonExhaustive(_) => Attribute::NonExhaustive, |
| AK::AutomaticallyDerived(_) => Attribute::AutomaticallyDerived, |
| |
| _ => other_attr(tcx, attr), |
| }) |
| } |
| |
| fn other_attr(tcx: TyCtxt<'_>, attr: &hir::Attribute) -> Attribute { |
| let mut s = rustc_hir_pretty::attribute_to_string(&tcx, attr); |
| assert_eq!(s.pop(), Some('\n')); |
| Attribute::Other(s) |
| } |
| |
| fn repr_attr(tcx: TyCtxt<'_>, def_id: DefId) -> Attribute { |
| let repr = tcx.adt_def(def_id).repr(); |
| |
| let kind = if repr.c() { |
| ReprKind::C |
| } else if repr.transparent() { |
| ReprKind::Transparent |
| } else if repr.simd() { |
| ReprKind::Simd |
| } else { |
| ReprKind::Rust |
| }; |
| |
| let align = repr.align.map(|a| a.bytes()); |
| let packed = repr.pack.map(|p| p.bytes()); |
| let int = repr.int.map(format_integer_type); |
| |
| Attribute::Repr(AttributeRepr { kind, align, packed, int }) |
| } |
| |
| fn format_integer_type(it: rustc_abi::IntegerType) -> String { |
| use rustc_abi::Integer::*; |
| use rustc_abi::IntegerType::*; |
| match it { |
| Pointer(true) => "isize", |
| Pointer(false) => "usize", |
| Fixed(I8, true) => "i8", |
| Fixed(I8, false) => "u8", |
| Fixed(I16, true) => "i16", |
| Fixed(I16, false) => "u16", |
| Fixed(I32, true) => "i32", |
| Fixed(I32, false) => "u32", |
| Fixed(I64, true) => "i64", |
| Fixed(I64, false) => "u64", |
| Fixed(I128, true) => "i128", |
| Fixed(I128, false) => "u128", |
| } |
| .to_owned() |
| } |
