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.
5 #![allow(rustc::default_hash_types)]
7 use std::convert::From;
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;
16 use rustdoc_json_types::*;
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;
24 impl JsonRenderer<'_> {
25 pub(super) fn convert_item(&self, item: clean::Item) -> Option<Item> {
26 let deprecation = item.deprecation(self.tcx);
27 let clean::Item { span, name, attrs, kind, visibility, def_id } = item;
28 let inner = match *kind {
29 clean::StrippedItem(_) => return None,
30 x => from_clean_item_kind(x, self.tcx, &name),
33 id: from_def_id(def_id),
34 crate_id: def_id.krate.as_u32(),
35 name: name.map(|sym| sym.to_string()),
36 span: self.convert_span(span),
37 visibility: self.convert_visibility(visibility),
38 docs: attrs.collapsed_doc_value(),
42 .filter_map(|clean::ItemLink { link, did, .. }| {
43 did.map(|did| (link, from_def_id(did)))
49 .map(rustc_ast_pretty::pprust::attribute_to_string)
51 deprecation: deprecation.map(from_deprecation),
56 fn convert_span(&self, span: clean::Span) -> Option<Span> {
57 match span.filename(self.sess()) {
58 rustc_span::FileName::Real(name) => {
59 let hi = span.hi(self.sess());
60 let lo = span.lo(self.sess());
62 filename: match name {
63 rustc_span::RealFileName::Named(path) => path,
64 rustc_span::RealFileName::Devirtualized { local_path, virtual_name: _ } => {
68 begin: (lo.line, lo.col.to_usize()),
69 end: (hi.line, hi.col.to_usize()),
76 fn convert_visibility(&self, v: clean::Visibility) -> Visibility {
77 use clean::Visibility::*;
79 Public => Visibility::Public,
80 Inherited => Visibility::Default,
81 Restricted(did) if did.index == CRATE_DEF_INDEX => Visibility::Crate,
82 Restricted(did) => Visibility::Restricted {
83 parent: from_def_id(did),
84 path: self.tcx.def_path(did).to_string_no_crate_verbose(),
90 crate fn from_deprecation(deprecation: rustc_attr::Deprecation) -> Deprecation {
92 let rustc_attr::Deprecation { since, note, is_since_rustc_version: _, suggestion: _ } = deprecation;
93 Deprecation { since: since.map(|s| s.to_string()), note: note.map(|s| s.to_string()) }
96 impl From<clean::GenericArgs> for GenericArgs {
97 fn from(args: clean::GenericArgs) -> Self {
98 use clean::GenericArgs::*;
100 AngleBracketed { args, bindings } => GenericArgs::AngleBracketed {
101 args: args.into_iter().map(Into::into).collect(),
102 bindings: bindings.into_iter().map(Into::into).collect(),
104 Parenthesized { inputs, output } => GenericArgs::Parenthesized {
105 inputs: inputs.into_iter().map(Into::into).collect(),
106 output: output.map(Into::into),
112 impl From<clean::GenericArg> for GenericArg {
113 fn from(arg: clean::GenericArg) -> Self {
114 use clean::GenericArg::*;
116 Lifetime(l) => GenericArg::Lifetime(l.0.to_string()),
117 Type(t) => GenericArg::Type(t.into()),
118 Const(c) => GenericArg::Const(c.into()),
123 impl From<clean::Constant> for Constant {
124 fn from(constant: clean::Constant) -> Self {
125 let clean::Constant { type_, expr, value, is_literal } = constant;
126 Constant { type_: type_.into(), expr, value, is_literal }
130 impl From<clean::TypeBinding> for TypeBinding {
131 fn from(binding: clean::TypeBinding) -> Self {
132 TypeBinding { name: binding.name.to_string(), binding: binding.kind.into() }
136 impl From<clean::TypeBindingKind> for TypeBindingKind {
137 fn from(kind: clean::TypeBindingKind) -> Self {
138 use clean::TypeBindingKind::*;
140 Equality { ty } => TypeBindingKind::Equality(ty.into()),
141 Constraint { bounds } => {
142 TypeBindingKind::Constraint(bounds.into_iter().map(Into::into).collect())
148 crate fn from_def_id(did: DefId) -> Id {
149 Id(format!("{}:{}", did.krate.as_u32(), u32::from(did.index)))
152 fn from_clean_item_kind(item: clean::ItemKind, tcx: TyCtxt<'_>, name: &Option<Symbol>) -> ItemEnum {
153 use clean::ItemKind::*;
155 ModuleItem(m) => ItemEnum::Module(m.into()),
156 ImportItem(i) => ItemEnum::Import(i.into()),
157 StructItem(s) => ItemEnum::Struct(s.into()),
158 UnionItem(u) => ItemEnum::Union(u.into()),
159 StructFieldItem(f) => ItemEnum::StructField(f.into()),
160 EnumItem(e) => ItemEnum::Enum(e.into()),
161 VariantItem(v) => ItemEnum::Variant(v.into()),
162 FunctionItem(f) => ItemEnum::Function(f.into()),
163 ForeignFunctionItem(f) => ItemEnum::Function(f.into()),
164 TraitItem(t) => ItemEnum::Trait(t.into()),
165 TraitAliasItem(t) => ItemEnum::TraitAlias(t.into()),
166 MethodItem(m, _) => ItemEnum::Method(from_function_method(m, true)),
167 TyMethodItem(m) => ItemEnum::Method(from_function_method(m, false)),
168 ImplItem(i) => ItemEnum::Impl(i.into()),
169 StaticItem(s) => ItemEnum::Static(from_clean_static(s, tcx)),
170 ForeignStaticItem(s) => ItemEnum::Static(from_clean_static(s, tcx)),
171 ForeignTypeItem => ItemEnum::ForeignType,
172 TypedefItem(t, _) => ItemEnum::Typedef(t.into()),
173 OpaqueTyItem(t) => ItemEnum::OpaqueTy(t.into()),
174 ConstantItem(c) => ItemEnum::Constant(c.into()),
175 MacroItem(m) => ItemEnum::Macro(m.source),
176 ProcMacroItem(m) => ItemEnum::ProcMacro(m.into()),
177 AssocConstItem(t, s) => ItemEnum::AssocConst { type_: t.into(), default: s },
178 AssocTypeItem(g, t) => ItemEnum::AssocType {
179 bounds: g.into_iter().map(Into::into).collect(),
180 default: t.map(Into::into),
182 StrippedItem(inner) => from_clean_item_kind(*inner, tcx, name),
183 PrimitiveItem(_) | KeywordItem(_) => {
184 panic!("{:?} is not supported for JSON output", item)
186 ExternCrateItem { ref src } => ItemEnum::ExternCrate {
187 name: name.as_ref().unwrap().to_string(),
188 rename: src.map(|x| x.to_string()),
193 impl From<clean::Module> for Module {
194 fn from(module: clean::Module) -> Self {
195 Module { is_crate: module.is_crate, items: ids(module.items) }
199 impl From<clean::Struct> for Struct {
200 fn from(struct_: clean::Struct) -> Self {
201 let clean::Struct { struct_type, generics, fields, fields_stripped } = struct_;
203 struct_type: from_ctor_kind(struct_type),
204 generics: generics.into(),
207 impls: Vec::new(), // Added in JsonRenderer::item
212 impl From<clean::Union> for Union {
213 fn from(struct_: clean::Union) -> Self {
214 let clean::Union { generics, fields, fields_stripped } = struct_;
216 generics: generics.into(),
219 impls: Vec::new(), // Added in JsonRenderer::item
224 crate fn from_ctor_kind(struct_type: CtorKind) -> StructType {
226 CtorKind::Fictive => StructType::Plain,
227 CtorKind::Fn => StructType::Tuple,
228 CtorKind::Const => StructType::Unit,
232 crate fn from_fn_header(header: &rustc_hir::FnHeader) -> HashSet<Qualifiers> {
233 let mut v = HashSet::new();
235 if let rustc_hir::Unsafety::Unsafe = header.unsafety {
236 v.insert(Qualifiers::Unsafe);
239 if let rustc_hir::IsAsync::Async = header.asyncness {
240 v.insert(Qualifiers::Async);
243 if let rustc_hir::Constness::Const = header.constness {
244 v.insert(Qualifiers::Const);
250 impl From<clean::Function> for Function {
251 fn from(function: clean::Function) -> Self {
252 let clean::Function { decl, generics, header } = function;
255 generics: generics.into(),
256 header: from_fn_header(&header),
257 abi: header.abi.to_string(),
262 impl From<clean::Generics> for Generics {
263 fn from(generics: clean::Generics) -> Self {
265 params: generics.params.into_iter().map(Into::into).collect(),
266 where_predicates: generics.where_predicates.into_iter().map(Into::into).collect(),
271 impl From<clean::GenericParamDef> for GenericParamDef {
272 fn from(generic_param: clean::GenericParamDef) -> Self {
273 GenericParamDef { name: generic_param.name.to_string(), kind: generic_param.kind.into() }
277 impl From<clean::GenericParamDefKind> for GenericParamDefKind {
278 fn from(kind: clean::GenericParamDefKind) -> Self {
279 use clean::GenericParamDefKind::*;
281 Lifetime => GenericParamDefKind::Lifetime,
282 Type { did: _, bounds, default, synthetic: _ } => GenericParamDefKind::Type {
283 bounds: bounds.into_iter().map(Into::into).collect(),
284 default: default.map(Into::into),
286 Const { did: _, ty } => GenericParamDefKind::Const(ty.into()),
291 impl From<clean::WherePredicate> for WherePredicate {
292 fn from(predicate: clean::WherePredicate) -> Self {
293 use clean::WherePredicate::*;
295 BoundPredicate { ty, bounds } => WherePredicate::BoundPredicate {
297 bounds: bounds.into_iter().map(Into::into).collect(),
299 RegionPredicate { lifetime, bounds } => WherePredicate::RegionPredicate {
300 lifetime: lifetime.0.to_string(),
301 bounds: bounds.into_iter().map(Into::into).collect(),
303 EqPredicate { lhs, rhs } => {
304 WherePredicate::EqPredicate { lhs: lhs.into(), rhs: rhs.into() }
310 impl From<clean::GenericBound> for GenericBound {
311 fn from(bound: clean::GenericBound) -> Self {
312 use clean::GenericBound::*;
314 TraitBound(clean::PolyTrait { trait_, generic_params }, modifier) => {
315 GenericBound::TraitBound {
316 trait_: trait_.into(),
317 generic_params: generic_params.into_iter().map(Into::into).collect(),
318 modifier: from_trait_bound_modifier(modifier),
321 Outlives(lifetime) => GenericBound::Outlives(lifetime.0.to_string()),
326 crate fn from_trait_bound_modifier(modifier: rustc_hir::TraitBoundModifier) -> TraitBoundModifier {
327 use rustc_hir::TraitBoundModifier::*;
329 None => TraitBoundModifier::None,
330 Maybe => TraitBoundModifier::Maybe,
331 MaybeConst => TraitBoundModifier::MaybeConst,
335 impl From<clean::Type> for Type {
336 fn from(ty: clean::Type) -> Self {
339 ResolvedPath { path, param_names, did, is_generic: _ } => Type::ResolvedPath {
340 name: path.whole_name(),
341 id: from_def_id(did),
342 args: path.segments.last().map(|args| Box::new(args.clone().args.into())),
343 param_names: param_names
344 .map(|v| v.into_iter().map(Into::into).collect())
345 .unwrap_or_default(),
347 Generic(s) => Type::Generic(s.to_string()),
348 Primitive(p) => Type::Primitive(p.as_str().to_string()),
349 BareFunction(f) => Type::FunctionPointer(Box::new((*f).into())),
350 Tuple(t) => Type::Tuple(t.into_iter().map(Into::into).collect()),
351 Slice(t) => Type::Slice(Box::new((*t).into())),
352 Array(t, s) => Type::Array { type_: Box::new((*t).into()), len: s },
353 ImplTrait(g) => Type::ImplTrait(g.into_iter().map(Into::into).collect()),
354 Never => Type::Never,
355 Infer => Type::Infer,
356 RawPointer(mutability, type_) => Type::RawPointer {
357 mutable: mutability == ast::Mutability::Mut,
358 type_: Box::new((*type_).into()),
360 BorrowedRef { lifetime, mutability, type_ } => Type::BorrowedRef {
361 lifetime: lifetime.map(|l| l.0.to_string()),
362 mutable: mutability == ast::Mutability::Mut,
363 type_: Box::new((*type_).into()),
365 QPath { name, self_type, trait_ } => Type::QualifiedPath {
366 name: name.to_string(),
367 self_type: Box::new((*self_type).into()),
368 trait_: Box::new((*trait_).into()),
374 impl From<clean::BareFunctionDecl> for FunctionPointer {
375 fn from(bare_decl: clean::BareFunctionDecl) -> Self {
376 let clean::BareFunctionDecl { unsafety, generic_params, decl, abi } = bare_decl;
378 header: if let rustc_hir::Unsafety::Unsafe = unsafety {
379 let mut hs = HashSet::new();
380 hs.insert(Qualifiers::Unsafe);
385 generic_params: generic_params.into_iter().map(Into::into).collect(),
387 abi: abi.to_string(),
392 impl From<clean::FnDecl> for FnDecl {
393 fn from(decl: clean::FnDecl) -> Self {
394 let clean::FnDecl { inputs, output, c_variadic, attrs: _ } = decl;
399 .map(|arg| (arg.name.to_string(), arg.type_.into()))
401 output: match output {
402 clean::FnRetTy::Return(t) => Some(t.into()),
403 clean::FnRetTy::DefaultReturn => None,
410 impl From<clean::Trait> for Trait {
411 fn from(trait_: clean::Trait) -> Self {
412 let clean::Trait { unsafety, items, generics, bounds, is_auto } = trait_;
415 is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,
417 generics: generics.into(),
418 bounds: bounds.into_iter().map(Into::into).collect(),
419 implementors: Vec::new(), // Added in JsonRenderer::item
424 impl From<clean::Impl> for Impl {
425 fn from(impl_: clean::Impl) -> Self {
429 provided_trait_methods,
438 is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,
439 generics: generics.into(),
440 provided_trait_methods: provided_trait_methods
442 .map(|x| x.to_string())
444 trait_: trait_.map(Into::into),
447 negative: negative_polarity,
449 blanket_impl: blanket_impl.map(Into::into),
454 crate fn from_function_method(function: clean::Function, has_body: bool) -> Method {
455 let clean::Function { header, decl, generics } = function;
458 generics: generics.into(),
459 header: from_fn_header(&header),
460 abi: header.abi.to_string(),
465 impl From<clean::Enum> for Enum {
466 fn from(enum_: clean::Enum) -> Self {
467 let clean::Enum { variants, generics, variants_stripped } = enum_;
469 generics: generics.into(),
471 variants: ids(variants),
472 impls: Vec::new(), // Added in JsonRenderer::item
477 impl From<clean::VariantStruct> for Struct {
478 fn from(struct_: clean::VariantStruct) -> Self {
479 let clean::VariantStruct { struct_type, fields, fields_stripped } = struct_;
481 struct_type: from_ctor_kind(struct_type),
482 generics: Default::default(),
490 impl From<clean::Variant> for Variant {
491 fn from(variant: clean::Variant) -> Self {
492 use clean::Variant::*;
494 CLike => Variant::Plain,
495 Tuple(t) => Variant::Tuple(t.into_iter().map(Into::into).collect()),
496 Struct(s) => Variant::Struct(ids(s.fields)),
501 impl From<clean::Import> for Import {
502 fn from(import: clean::Import) -> Self {
503 use clean::ImportKind::*;
505 Simple(s) => Import {
506 source: import.source.path.whole_name(),
508 id: import.source.did.map(from_def_id),
512 source: import.source.path.whole_name(),
513 name: import.source.path.last_name().to_string(),
514 id: import.source.did.map(from_def_id),
521 impl From<clean::ProcMacro> for ProcMacro {
522 fn from(mac: clean::ProcMacro) -> Self {
524 kind: from_macro_kind(mac.kind),
525 helpers: mac.helpers.iter().map(|x| x.to_string()).collect(),
530 crate fn from_macro_kind(kind: rustc_span::hygiene::MacroKind) -> MacroKind {
531 use rustc_span::hygiene::MacroKind::*;
533 Bang => MacroKind::Bang,
534 Attr => MacroKind::Attr,
535 Derive => MacroKind::Derive,
539 impl From<clean::Typedef> for Typedef {
540 fn from(typedef: clean::Typedef) -> Self {
541 let clean::Typedef { type_, generics, item_type: _ } = typedef;
542 Typedef { type_: type_.into(), generics: generics.into() }
546 impl From<clean::OpaqueTy> for OpaqueTy {
547 fn from(opaque: clean::OpaqueTy) -> Self {
549 bounds: opaque.bounds.into_iter().map(Into::into).collect(),
550 generics: opaque.generics.into(),
555 fn from_clean_static(stat: clean::Static, tcx: TyCtxt<'_>) -> Static {
557 type_: stat.type_.into(),
558 mutable: stat.mutability == ast::Mutability::Mut,
559 expr: stat.expr.map(|e| print_const_expr(tcx, e)).unwrap_or_default(),
563 impl From<clean::TraitAlias> for TraitAlias {
564 fn from(alias: clean::TraitAlias) -> Self {
566 generics: alias.generics.into(),
567 params: alias.bounds.into_iter().map(Into::into).collect(),
572 impl From<ItemType> for ItemKind {
573 fn from(kind: ItemType) -> Self {
576 Module => ItemKind::Module,
577 ExternCrate => ItemKind::ExternCrate,
578 Import => ItemKind::Import,
579 Struct => ItemKind::Struct,
580 Union => ItemKind::Union,
581 Enum => ItemKind::Enum,
582 Function => ItemKind::Function,
583 Typedef => ItemKind::Typedef,
584 OpaqueTy => ItemKind::OpaqueTy,
585 Static => ItemKind::Static,
586 Constant => ItemKind::Constant,
587 Trait => ItemKind::Trait,
588 Impl => ItemKind::Impl,
589 TyMethod | Method => ItemKind::Method,
590 StructField => ItemKind::StructField,
591 Variant => ItemKind::Variant,
592 Macro => ItemKind::Macro,
593 Primitive => ItemKind::Primitive,
594 AssocConst => ItemKind::AssocConst,
595 AssocType => ItemKind::AssocType,
596 ForeignType => ItemKind::ForeignType,
597 Keyword => ItemKind::Keyword,
598 TraitAlias => ItemKind::TraitAlias,
599 ProcAttribute => ItemKind::ProcAttribute,
600 ProcDerive => ItemKind::ProcDerive,
605 fn ids(items: impl IntoIterator<Item = clean::Item>) -> Vec<Id> {
606 items.into_iter().filter(|x| !x.is_stripped()).map(|i| from_def_id(i.def_id)).collect()