src/librustdoc/json/conversions.rs

   1 //! These from impls are used to create the JSON types which get serialized. They're very close to
   2 //! the `clean` types but with some fields removed or stringified to simplify the output and not
   3 //! expose unstable compiler internals.
   4
   5 #![allow(rustc::default_hash_types)]
   6
   7 use std::convert::From;
   8
   9 use rustc_ast::ast;
  10 use rustc_hir::def::CtorKind;
  11 use rustc_middle::ty::TyCtxt;
  12 use rustc_span::def_id::{DefId, CRATE_DEF_INDEX};
  13 use rustc_span::symbol::Symbol;
  14 use rustc_span::Pos;
  15
  16 use rustdoc_json_types::*;
  17
  18 use crate::clean;
  19 use crate::clean::utils::print_const_expr;
  20 use crate::formats::item_type::ItemType;
  21 use crate::json::JsonRenderer;
  22 use std::collections::HashSet;
  23
  24 impl JsonRenderer<'_> {
  25     pub(super) fn convert_item(&self, item: clean::Item) -> Option<Item> {
  26         let deprecation = item.deprecation(self.tcx);
  27         let links = self
  28             .cache
  29             .intra_doc_links
  30             .get(&item.def_id)
  31             .into_iter()
  32             .flatten()
  33             .filter_map(|clean::ItemLink { link, did, .. }| {
  34                 did.map(|did| (link.clone(), from_def_id(did)))
  35             })
  36             .collect();
  37         let clean::Item { span, name, attrs, kind, visibility, def_id } = item;
  38         let inner = match *kind {
  39             clean::StrippedItem(_) => return None,
  40             kind => from_clean_item_kind(kind, self.tcx, &name),
  41         };
  42         Some(Item {
  43             id: from_def_id(def_id),
  44             crate_id: def_id.krate.as_u32(),
  45             name: name.map(|sym| sym.to_string()),
  46             span: self.convert_span(span),
  47             visibility: self.convert_visibility(visibility),
  48             docs: attrs.collapsed_doc_value(),
  49             attrs: attrs
  50                 .other_attrs
  51                 .iter()
  52                 .map(rustc_ast_pretty::pprust::attribute_to_string)
  53                 .collect(),
  54             deprecation: deprecation.map(from_deprecation),
  55             inner,
  56             links,
  57         })
  58     }
  59
  60     fn convert_span(&self, span: clean::Span) -> Option<Span> {
  61         match span.filename(self.sess()) {
  62             rustc_span::FileName::Real(name) => {
  63                 let hi = span.hi(self.sess());
  64                 let lo = span.lo(self.sess());
  65                 Some(Span {
  66                     filename: match name {
  67                         rustc_span::RealFileName::Named(path) => path,
  68                         rustc_span::RealFileName::Devirtualized { local_path, virtual_name: _ } => {
  69                             local_path
  70                         }
  71                     },
  72                     begin: (lo.line, lo.col.to_usize()),
  73                     end: (hi.line, hi.col.to_usize()),
  74                 })
  75             }
  76             _ => None,
  77         }
  78     }
  79
  80     fn convert_visibility(&self, v: clean::Visibility) -> Visibility {
  81         use clean::Visibility::*;
  82         match v {
  83             Public => Visibility::Public,
  84             Inherited => Visibility::Default,
  85             Restricted(did) if did.index == CRATE_DEF_INDEX => Visibility::Crate,
  86             Restricted(did) => Visibility::Restricted {
  87                 parent: from_def_id(did),
  88                 path: self.tcx.def_path(did).to_string_no_crate_verbose(),
  89             },
  90         }
  91     }
  92 }
  93
  94 crate trait FromWithTcx<T> {
  95     fn from_tcx(f: T, tcx: TyCtxt<'_>) -> Self;
  96 }
  97
  98 crate trait IntoWithTcx<T> {
  99     fn into_tcx(self, tcx: TyCtxt<'_>) -> T;
 100 }
 101
 102 impl<T, U> IntoWithTcx<U> for T
 103 where
 104     U: FromWithTcx<T>,
 105 {
 106     fn into_tcx(self, tcx: TyCtxt<'_>) -> U {
 107         U::from_tcx(self, tcx)
 108     }
 109 }
 110
 111 crate fn from_deprecation(deprecation: rustc_attr::Deprecation) -> Deprecation {
 112     #[rustfmt::skip]
 113     let rustc_attr::Deprecation { since, note, is_since_rustc_version: _, suggestion: _ } = deprecation;
 114     Deprecation { since: since.map(|s| s.to_string()), note: note.map(|s| s.to_string()) }
 115 }
 116
 117 impl FromWithTcx<clean::GenericArgs> for GenericArgs {
 118     fn from_tcx(args: clean::GenericArgs, tcx: TyCtxt<'_>) -> Self {
 119         use clean::GenericArgs::*;
 120         match args {
 121             AngleBracketed { args, bindings } => GenericArgs::AngleBracketed {
 122                 args: args.into_iter().map(|a| a.into_tcx(tcx)).collect(),
 123                 bindings: bindings.into_iter().map(|a| a.into_tcx(tcx)).collect(),
 124             },
 125             Parenthesized { inputs, output } => GenericArgs::Parenthesized {
 126                 inputs: inputs.into_iter().map(|a| a.into_tcx(tcx)).collect(),
 127                 output: output.map(|a| a.into_tcx(tcx)),
 128             },
 129         }
 130     }
 131 }
 132
 133 impl FromWithTcx<clean::GenericArg> for GenericArg {
 134     fn from_tcx(arg: clean::GenericArg, tcx: TyCtxt<'_>) -> Self {
 135         use clean::GenericArg::*;
 136         match arg {
 137             Lifetime(l) => GenericArg::Lifetime(l.0.to_string()),
 138             Type(t) => GenericArg::Type(t.into_tcx(tcx)),
 139             Const(c) => GenericArg::Const(c.into_tcx(tcx)),
 140         }
 141     }
 142 }
 143
 144 impl FromWithTcx<clean::Constant> for Constant {
 145     fn from_tcx(constant: clean::Constant, tcx: TyCtxt<'_>) -> Self {
 146         let expr = constant.expr(tcx);
 147         let value = constant.value(tcx);
 148         let is_literal = constant.is_literal(tcx);
 149         Constant { type_: constant.type_.into_tcx(tcx), expr, value, is_literal }
 150     }
 151 }
 152
 153 impl FromWithTcx<clean::TypeBinding> for TypeBinding {
 154     fn from_tcx(binding: clean::TypeBinding, tcx: TyCtxt<'_>) -> Self {
 155         TypeBinding { name: binding.name.to_string(), binding: binding.kind.into_tcx(tcx) }
 156     }
 157 }
 158
 159 impl FromWithTcx<clean::TypeBindingKind> for TypeBindingKind {
 160     fn from_tcx(kind: clean::TypeBindingKind, tcx: TyCtxt<'_>) -> Self {
 161         use clean::TypeBindingKind::*;
 162         match kind {
 163             Equality { ty } => TypeBindingKind::Equality(ty.into_tcx(tcx)),
 164             Constraint { bounds } => {
 165                 TypeBindingKind::Constraint(bounds.into_iter().map(|a| a.into_tcx(tcx)).collect())
 166             }
 167         }
 168     }
 169 }
 170
 171 crate fn from_def_id(did: DefId) -> Id {
 172     Id(format!("{}:{}", did.krate.as_u32(), u32::from(did.index)))
 173 }
 174
 175 fn from_clean_item_kind(item: clean::ItemKind, tcx: TyCtxt<'_>, name: &Option<Symbol>) -> ItemEnum {
 176     use clean::ItemKind::*;
 177     match item {
 178         ModuleItem(m) => ItemEnum::Module(m.into_tcx(tcx)),
 179         ImportItem(i) => ItemEnum::Import(i.into_tcx(tcx)),
 180         StructItem(s) => ItemEnum::Struct(s.into_tcx(tcx)),
 181         UnionItem(u) => ItemEnum::Union(u.into_tcx(tcx)),
 182         StructFieldItem(f) => ItemEnum::StructField(f.into_tcx(tcx)),
 183         EnumItem(e) => ItemEnum::Enum(e.into_tcx(tcx)),
 184         VariantItem(v) => ItemEnum::Variant(v.into_tcx(tcx)),
 185         FunctionItem(f) => ItemEnum::Function(f.into_tcx(tcx)),
 186         ForeignFunctionItem(f) => ItemEnum::Function(f.into_tcx(tcx)),
 187         TraitItem(t) => ItemEnum::Trait(t.into_tcx(tcx)),
 188         TraitAliasItem(t) => ItemEnum::TraitAlias(t.into_tcx(tcx)),
 189         MethodItem(m, _) => ItemEnum::Method(from_function_method(m, true, tcx)),
 190         TyMethodItem(m) => ItemEnum::Method(from_function_method(m, false, tcx)),
 191         ImplItem(i) => ItemEnum::Impl(i.into_tcx(tcx)),
 192         StaticItem(s) => ItemEnum::Static(s.into_tcx(tcx)),
 193         ForeignStaticItem(s) => ItemEnum::Static(s.into_tcx(tcx)),
 194         ForeignTypeItem => ItemEnum::ForeignType,
 195         TypedefItem(t, _) => ItemEnum::Typedef(t.into_tcx(tcx)),
 196         OpaqueTyItem(t) => ItemEnum::OpaqueTy(t.into_tcx(tcx)),
 197         ConstantItem(c) => ItemEnum::Constant(c.into_tcx(tcx)),
 198         MacroItem(m) => ItemEnum::Macro(m.source),
 199         ProcMacroItem(m) => ItemEnum::ProcMacro(m.into_tcx(tcx)),
 200         AssocConstItem(t, s) => ItemEnum::AssocConst { type_: t.into_tcx(tcx), default: s },
 201         AssocTypeItem(g, t) => ItemEnum::AssocType {
 202             bounds: g.into_iter().map(|x| x.into_tcx(tcx)).collect(),
 203             default: t.map(|x| x.into_tcx(tcx)),
 204         },
 205         // `convert_item` early returns `None` for striped items
 206         StrippedItem(_) => unreachable!(),
 207         PrimitiveItem(_) | KeywordItem(_) => {
 208             panic!("{:?} is not supported for JSON output", item)
 209         }
 210         ExternCrateItem { ref src } => ItemEnum::ExternCrate {
 211             name: name.as_ref().unwrap().to_string(),
 212             rename: src.map(|x| x.to_string()),
 213         },
 214     }
 215 }
 216
 217 impl FromWithTcx<clean::Module> for Module {
 218     fn from_tcx(module: clean::Module, _tcx: TyCtxt<'_>) -> Self {
 219         Module { is_crate: module.is_crate, items: ids(module.items) }
 220     }
 221 }
 222
 223 impl FromWithTcx<clean::Struct> for Struct {
 224     fn from_tcx(struct_: clean::Struct, tcx: TyCtxt<'_>) -> Self {
 225         let clean::Struct { struct_type, generics, fields, fields_stripped } = struct_;
 226         Struct {
 227             struct_type: from_ctor_kind(struct_type),
 228             generics: generics.into_tcx(tcx),
 229             fields_stripped,
 230             fields: ids(fields),
 231             impls: Vec::new(), // Added in JsonRenderer::item
 232         }
 233     }
 234 }
 235
 236 impl FromWithTcx<clean::Union> for Union {
 237     fn from_tcx(struct_: clean::Union, tcx: TyCtxt<'_>) -> Self {
 238         let clean::Union { generics, fields, fields_stripped } = struct_;
 239         Union {
 240             generics: generics.into_tcx(tcx),
 241             fields_stripped,
 242             fields: ids(fields),
 243             impls: Vec::new(), // Added in JsonRenderer::item
 244         }
 245     }
 246 }
 247
 248 crate fn from_ctor_kind(struct_type: CtorKind) -> StructType {
 249     match struct_type {
 250         CtorKind::Fictive => StructType::Plain,
 251         CtorKind::Fn => StructType::Tuple,
 252         CtorKind::Const => StructType::Unit,
 253     }
 254 }
 255
 256 crate fn from_fn_header(header: &rustc_hir::FnHeader) -> HashSet<Qualifiers> {
 257     let mut v = HashSet::new();
 258
 259     if let rustc_hir::Unsafety::Unsafe = header.unsafety {
 260         v.insert(Qualifiers::Unsafe);
 261     }
 262
 263     if let rustc_hir::IsAsync::Async = header.asyncness {
 264         v.insert(Qualifiers::Async);
 265     }
 266
 267     if let rustc_hir::Constness::Const = header.constness {
 268         v.insert(Qualifiers::Const);
 269     }
 270
 271     v
 272 }
 273
 274 impl FromWithTcx<clean::Function> for Function {
 275     fn from_tcx(function: clean::Function, tcx: TyCtxt<'_>) -> Self {
 276         let clean::Function { decl, generics, header } = function;
 277         Function {
 278             decl: decl.into_tcx(tcx),
 279             generics: generics.into_tcx(tcx),
 280             header: from_fn_header(&header),
 281             abi: header.abi.to_string(),
 282         }
 283     }
 284 }
 285
 286 impl FromWithTcx<clean::Generics> for Generics {
 287     fn from_tcx(generics: clean::Generics, tcx: TyCtxt<'_>) -> Self {
 288         Generics {
 289             params: generics.params.into_iter().map(|x| x.into_tcx(tcx)).collect(),
 290             where_predicates: generics
 291                 .where_predicates
 292                 .into_iter()
 293                 .map(|x| x.into_tcx(tcx))
 294                 .collect(),
 295         }
 296     }
 297 }
 298
 299 impl FromWithTcx<clean::GenericParamDef> for GenericParamDef {
 300     fn from_tcx(generic_param: clean::GenericParamDef, tcx: TyCtxt<'_>) -> Self {
 301         GenericParamDef {
 302             name: generic_param.name.to_string(),
 303             kind: generic_param.kind.into_tcx(tcx),
 304         }
 305     }
 306 }
 307
 308 impl FromWithTcx<clean::GenericParamDefKind> for GenericParamDefKind {
 309     fn from_tcx(kind: clean::GenericParamDefKind, tcx: TyCtxt<'_>) -> Self {
 310         use clean::GenericParamDefKind::*;
 311         match kind {
 312             Lifetime => GenericParamDefKind::Lifetime,
 313             Type { did: _, bounds, default, synthetic: _ } => GenericParamDefKind::Type {
 314                 bounds: bounds.into_iter().map(|x| x.into_tcx(tcx)).collect(),
 315                 default: default.map(|x| x.into_tcx(tcx)),
 316             },
 317             Const { did: _, ty } => GenericParamDefKind::Const(ty.into_tcx(tcx)),
 318         }
 319     }
 320 }
 321
 322 impl FromWithTcx<clean::WherePredicate> for WherePredicate {
 323     fn from_tcx(predicate: clean::WherePredicate, tcx: TyCtxt<'_>) -> Self {
 324         use clean::WherePredicate::*;
 325         match predicate {
 326             BoundPredicate { ty, bounds } => WherePredicate::BoundPredicate {
 327                 ty: ty.into_tcx(tcx),
 328                 bounds: bounds.into_iter().map(|x| x.into_tcx(tcx)).collect(),
 329             },
 330             RegionPredicate { lifetime, bounds } => WherePredicate::RegionPredicate {
 331                 lifetime: lifetime.0.to_string(),
 332                 bounds: bounds.into_iter().map(|x| x.into_tcx(tcx)).collect(),
 333             },
 334             EqPredicate { lhs, rhs } => {
 335                 WherePredicate::EqPredicate { lhs: lhs.into_tcx(tcx), rhs: rhs.into_tcx(tcx) }
 336             }
 337         }
 338     }
 339 }
 340
 341 impl FromWithTcx<clean::GenericBound> for GenericBound {
 342     fn from_tcx(bound: clean::GenericBound, tcx: TyCtxt<'_>) -> Self {
 343         use clean::GenericBound::*;
 344         match bound {
 345             TraitBound(clean::PolyTrait { trait_, generic_params }, modifier) => {
 346                 GenericBound::TraitBound {
 347                     trait_: trait_.into_tcx(tcx),
 348                     generic_params: generic_params.into_iter().map(|x| x.into_tcx(tcx)).collect(),
 349                     modifier: from_trait_bound_modifier(modifier),
 350                 }
 351             }
 352             Outlives(lifetime) => GenericBound::Outlives(lifetime.0.to_string()),
 353         }
 354     }
 355 }
 356
 357 crate fn from_trait_bound_modifier(modifier: rustc_hir::TraitBoundModifier) -> TraitBoundModifier {
 358     use rustc_hir::TraitBoundModifier::*;
 359     match modifier {
 360         None => TraitBoundModifier::None,
 361         Maybe => TraitBoundModifier::Maybe,
 362         MaybeConst => TraitBoundModifier::MaybeConst,
 363     }
 364 }
 365
 366 impl FromWithTcx<clean::Type> for Type {
 367     fn from_tcx(ty: clean::Type, tcx: TyCtxt<'_>) -> Self {
 368         use clean::Type::*;
 369         match ty {
 370             ResolvedPath { path, param_names, did, is_generic: _ } => Type::ResolvedPath {
 371                 name: path.whole_name(),
 372                 id: from_def_id(did),
 373                 args: path.segments.last().map(|args| Box::new(args.clone().args.into_tcx(tcx))),
 374                 param_names: param_names
 375                     .map(|v| v.into_iter().map(|x| x.into_tcx(tcx)).collect())
 376                     .unwrap_or_default(),
 377             },
 378             Generic(s) => Type::Generic(s.to_string()),
 379             Primitive(p) => Type::Primitive(p.as_str().to_string()),
 380             BareFunction(f) => Type::FunctionPointer(Box::new((*f).into_tcx(tcx))),
 381             Tuple(t) => Type::Tuple(t.into_iter().map(|x| x.into_tcx(tcx)).collect()),
 382             Slice(t) => Type::Slice(Box::new((*t).into_tcx(tcx))),
 383             Array(t, s) => Type::Array { type_: Box::new((*t).into_tcx(tcx)), len: s },
 384             ImplTrait(g) => Type::ImplTrait(g.into_iter().map(|x| x.into_tcx(tcx)).collect()),
 385             Never => Type::Never,
 386             Infer => Type::Infer,
 387             RawPointer(mutability, type_) => Type::RawPointer {
 388                 mutable: mutability == ast::Mutability::Mut,
 389                 type_: Box::new((*type_).into_tcx(tcx)),
 390             },
 391             BorrowedRef { lifetime, mutability, type_ } => Type::BorrowedRef {
 392                 lifetime: lifetime.map(|l| l.0.to_string()),
 393                 mutable: mutability == ast::Mutability::Mut,
 394                 type_: Box::new((*type_).into_tcx(tcx)),
 395             },
 396             QPath { name, self_type, trait_ } => Type::QualifiedPath {
 397                 name: name.to_string(),
 398                 self_type: Box::new((*self_type).into_tcx(tcx)),
 399                 trait_: Box::new((*trait_).into_tcx(tcx)),
 400             },
 401         }
 402     }
 403 }
 404
 405 impl FromWithTcx<clean::BareFunctionDecl> for FunctionPointer {
 406     fn from_tcx(bare_decl: clean::BareFunctionDecl, tcx: TyCtxt<'_>) -> Self {
 407         let clean::BareFunctionDecl { unsafety, generic_params, decl, abi } = bare_decl;
 408         FunctionPointer {
 409             header: if let rustc_hir::Unsafety::Unsafe = unsafety {
 410                 let mut hs = HashSet::new();
 411                 hs.insert(Qualifiers::Unsafe);
 412                 hs
 413             } else {
 414                 HashSet::new()
 415             },
 416             generic_params: generic_params.into_iter().map(|x| x.into_tcx(tcx)).collect(),
 417             decl: decl.into_tcx(tcx),
 418             abi: abi.to_string(),
 419         }
 420     }
 421 }
 422
 423 impl FromWithTcx<clean::FnDecl> for FnDecl {
 424     fn from_tcx(decl: clean::FnDecl, tcx: TyCtxt<'_>) -> Self {
 425         let clean::FnDecl { inputs, output, c_variadic, attrs: _ } = decl;
 426         FnDecl {
 427             inputs: inputs
 428                 .values
 429                 .into_iter()
 430                 .map(|arg| (arg.name.to_string(), arg.type_.into_tcx(tcx)))
 431                 .collect(),
 432             output: match output {
 433                 clean::FnRetTy::Return(t) => Some(t.into_tcx(tcx)),
 434                 clean::FnRetTy::DefaultReturn => None,
 435             },
 436             c_variadic,
 437         }
 438     }
 439 }
 440
 441 impl FromWithTcx<clean::Trait> for Trait {
 442     fn from_tcx(trait_: clean::Trait, tcx: TyCtxt<'_>) -> Self {
 443         let clean::Trait { unsafety, items, generics, bounds, is_auto } = trait_;
 444         Trait {
 445             is_auto,
 446             is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,
 447             items: ids(items),
 448             generics: generics.into_tcx(tcx),
 449             bounds: bounds.into_iter().map(|x| x.into_tcx(tcx)).collect(),
 450             implementors: Vec::new(), // Added in JsonRenderer::item
 451         }
 452     }
 453 }
 454
 455 impl FromWithTcx<clean::Impl> for Impl {
 456     fn from_tcx(impl_: clean::Impl, tcx: TyCtxt<'_>) -> Self {
 457         let clean::Impl {
 458             unsafety,
 459             generics,
 460             provided_trait_methods,
 461             trait_,
 462             for_,
 463             items,
 464             negative_polarity,
 465             synthetic,
 466             blanket_impl,
 467         } = impl_;
 468         Impl {
 469             is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,
 470             generics: generics.into_tcx(tcx),
 471             provided_trait_methods: provided_trait_methods
 472                 .into_iter()
 473                 .map(|x| x.to_string())
 474                 .collect(),
 475             trait_: trait_.map(|x| x.into_tcx(tcx)),
 476             for_: for_.into_tcx(tcx),
 477             items: ids(items),
 478             negative: negative_polarity,
 479             synthetic,
 480             blanket_impl: blanket_impl.map(|x| x.into_tcx(tcx)),
 481         }
 482     }
 483 }
 484
 485 crate fn from_function_method(
 486     function: clean::Function,
 487     has_body: bool,
 488     tcx: TyCtxt<'_>,
 489 ) -> Method {
 490     let clean::Function { header, decl, generics } = function;
 491     Method {
 492         decl: decl.into_tcx(tcx),
 493         generics: generics.into_tcx(tcx),
 494         header: from_fn_header(&header),
 495         abi: header.abi.to_string(),
 496         has_body,
 497     }
 498 }
 499
 500 impl FromWithTcx<clean::Enum> for Enum {
 501     fn from_tcx(enum_: clean::Enum, tcx: TyCtxt<'_>) -> Self {
 502         let clean::Enum { variants, generics, variants_stripped } = enum_;
 503         Enum {
 504             generics: generics.into_tcx(tcx),
 505             variants_stripped,
 506             variants: ids(variants),
 507             impls: Vec::new(), // Added in JsonRenderer::item
 508         }
 509     }
 510 }
 511
 512 impl FromWithTcx<clean::VariantStruct> for Struct {
 513     fn from_tcx(struct_: clean::VariantStruct, _tcx: TyCtxt<'_>) -> Self {
 514         let clean::VariantStruct { struct_type, fields, fields_stripped } = struct_;
 515         Struct {
 516             struct_type: from_ctor_kind(struct_type),
 517             generics: Default::default(),
 518             fields_stripped,
 519             fields: ids(fields),
 520             impls: Vec::new(),
 521         }
 522     }
 523 }
 524
 525 impl FromWithTcx<clean::Variant> for Variant {
 526     fn from_tcx(variant: clean::Variant, tcx: TyCtxt<'_>) -> Self {
 527         use clean::Variant::*;
 528         match variant {
 529             CLike => Variant::Plain,
 530             Tuple(t) => Variant::Tuple(t.into_iter().map(|x| x.into_tcx(tcx)).collect()),
 531             Struct(s) => Variant::Struct(ids(s.fields)),
 532         }
 533     }
 534 }
 535
 536 impl FromWithTcx<clean::Import> for Import {
 537     fn from_tcx(import: clean::Import, _tcx: TyCtxt<'_>) -> Self {
 538         use clean::ImportKind::*;
 539         match import.kind {
 540             Simple(s) => Import {
 541                 source: import.source.path.whole_name(),
 542                 name: s.to_string(),
 543                 id: import.source.did.map(from_def_id),
 544                 glob: false,
 545             },
 546             Glob => Import {
 547                 source: import.source.path.whole_name(),
 548                 name: import.source.path.last_name().to_string(),
 549                 id: import.source.did.map(from_def_id),
 550                 glob: true,
 551             },
 552         }
 553     }
 554 }
 555
 556 impl FromWithTcx<clean::ProcMacro> for ProcMacro {
 557     fn from_tcx(mac: clean::ProcMacro, _tcx: TyCtxt<'_>) -> Self {
 558         ProcMacro {
 559             kind: from_macro_kind(mac.kind),
 560             helpers: mac.helpers.iter().map(|x| x.to_string()).collect(),
 561         }
 562     }
 563 }
 564
 565 crate fn from_macro_kind(kind: rustc_span::hygiene::MacroKind) -> MacroKind {
 566     use rustc_span::hygiene::MacroKind::*;
 567     match kind {
 568         Bang => MacroKind::Bang,
 569         Attr => MacroKind::Attr,
 570         Derive => MacroKind::Derive,
 571     }
 572 }
 573
 574 impl FromWithTcx<clean::Typedef> for Typedef {
 575     fn from_tcx(typedef: clean::Typedef, tcx: TyCtxt<'_>) -> Self {
 576         let clean::Typedef { type_, generics, item_type: _ } = typedef;
 577         Typedef { type_: type_.into_tcx(tcx), generics: generics.into_tcx(tcx) }
 578     }
 579 }
 580
 581 impl FromWithTcx<clean::OpaqueTy> for OpaqueTy {
 582     fn from_tcx(opaque: clean::OpaqueTy, tcx: TyCtxt<'_>) -> Self {
 583         OpaqueTy {
 584             bounds: opaque.bounds.into_iter().map(|x| x.into_tcx(tcx)).collect(),
 585             generics: opaque.generics.into_tcx(tcx),
 586         }
 587     }
 588 }
 589
 590 impl FromWithTcx<clean::Static> for Static {
 591     fn from_tcx(stat: clean::Static, tcx: TyCtxt<'_>) -> Self {
 592         Static {
 593             type_: stat.type_.into_tcx(tcx),
 594             mutable: stat.mutability == ast::Mutability::Mut,
 595             expr: stat.expr.map(|e| print_const_expr(tcx, e)).unwrap_or_default(),
 596         }
 597     }
 598 }
 599
 600 impl FromWithTcx<clean::TraitAlias> for TraitAlias {
 601     fn from_tcx(alias: clean::TraitAlias, tcx: TyCtxt<'_>) -> Self {
 602         TraitAlias {
 603             generics: alias.generics.into_tcx(tcx),
 604             params: alias.bounds.into_iter().map(|x| x.into_tcx(tcx)).collect(),
 605         }
 606     }
 607 }
 608
 609 impl FromWithTcx<ItemType> for ItemKind {
 610     fn from_tcx(kind: ItemType, _tcx: TyCtxt<'_>) -> Self {
 611         use ItemType::*;
 612         match kind {
 613             Module => ItemKind::Module,
 614             ExternCrate => ItemKind::ExternCrate,
 615             Import => ItemKind::Import,
 616             Struct => ItemKind::Struct,
 617             Union => ItemKind::Union,
 618             Enum => ItemKind::Enum,
 619             Function => ItemKind::Function,
 620             Typedef => ItemKind::Typedef,
 621             OpaqueTy => ItemKind::OpaqueTy,
 622             Static => ItemKind::Static,
 623             Constant => ItemKind::Constant,
 624             Trait => ItemKind::Trait,
 625             Impl => ItemKind::Impl,
 626             TyMethod | Method => ItemKind::Method,
 627             StructField => ItemKind::StructField,
 628             Variant => ItemKind::Variant,
 629             Macro => ItemKind::Macro,
 630             Primitive => ItemKind::Primitive,
 631             AssocConst => ItemKind::AssocConst,
 632             AssocType => ItemKind::AssocType,
 633             ForeignType => ItemKind::ForeignType,
 634             Keyword => ItemKind::Keyword,
 635             TraitAlias => ItemKind::TraitAlias,
 636             ProcAttribute => ItemKind::ProcAttribute,
 637             ProcDerive => ItemKind::ProcDerive,
 638         }
 639     }
 640 }
 641
 642 fn ids(items: impl IntoIterator<Item = clean::Item>) -> Vec<Id> {
 643     items.into_iter().filter(|x| !x.is_stripped()).map(|i| from_def_id(i.def_id)).collect()
 644 }