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 use std::convert::From;
8 use rustc_span::def_id::{DefId, CRATE_DEF_INDEX};
13 use crate::formats::item_type::ItemType;
14 use crate::json::types::*;
15 use crate::json::JsonRenderer;
17 impl JsonRenderer<'_> {
18 pub(super) fn convert_item(&self, item: clean::Item) -> Option<Item> {
19 let item_type = ItemType::from(&item);
20 let deprecation = item.deprecation(self.tcx);
21 let clean::Item { source, name, attrs, kind, visibility, def_id } = item;
23 clean::StrippedItem(_) => None,
26 crate_id: def_id.krate.as_u32(),
27 name: name.map(|sym| sym.to_string()),
28 source: self.convert_span(source),
29 visibility: visibility.into(),
30 docs: attrs.collapsed_doc_value().unwrap_or_default(),
34 .filter_map(|clean::ItemLink { link, did, .. }| {
35 did.map(|did| (link, did.into()))
41 .map(rustc_ast_pretty::pprust::attribute_to_string)
43 deprecation: deprecation.map(Into::into),
44 kind: item_type.into(),
50 fn convert_span(&self, span: clean::Span) -> Option<Span> {
51 match span.filename(self.sess()) {
52 rustc_span::FileName::Real(name) => {
53 let hi = span.hi(self.sess());
54 let lo = span.lo(self.sess());
56 filename: match name {
57 rustc_span::RealFileName::Named(path) => path,
58 rustc_span::RealFileName::Devirtualized { local_path, virtual_name: _ } => {
62 begin: (lo.line, lo.col.to_usize()),
63 end: (hi.line, hi.col.to_usize()),
71 impl From<rustc_attr::Deprecation> for Deprecation {
72 fn from(deprecation: rustc_attr::Deprecation) -> Self {
74 let rustc_attr::Deprecation { since, note, is_since_rustc_version: _, suggestion: _ } = deprecation;
75 Deprecation { since: since.map(|s| s.to_string()), note: note.map(|s| s.to_string()) }
79 impl From<clean::Visibility> for Visibility {
80 fn from(v: clean::Visibility) -> Self {
81 use clean::Visibility::*;
83 Public => Visibility::Public,
84 Inherited => Visibility::Default,
85 Restricted(did, _) if did.index == CRATE_DEF_INDEX => Visibility::Crate,
86 Restricted(did, path) => Visibility::Restricted {
88 path: path.to_string_no_crate_verbose(),
94 impl From<clean::GenericArgs> for GenericArgs {
95 fn from(args: clean::GenericArgs) -> Self {
96 use clean::GenericArgs::*;
98 AngleBracketed { args, bindings } => GenericArgs::AngleBracketed {
99 args: args.into_iter().map(Into::into).collect(),
100 bindings: bindings.into_iter().map(Into::into).collect(),
102 Parenthesized { inputs, output } => GenericArgs::Parenthesized {
103 inputs: inputs.into_iter().map(Into::into).collect(),
104 output: output.map(Into::into),
110 impl From<clean::GenericArg> for GenericArg {
111 fn from(arg: clean::GenericArg) -> Self {
112 use clean::GenericArg::*;
114 Lifetime(l) => GenericArg::Lifetime(l.0.to_string()),
115 Type(t) => GenericArg::Type(t.into()),
116 Const(c) => GenericArg::Const(c.into()),
121 impl From<clean::Constant> for Constant {
122 fn from(constant: clean::Constant) -> Self {
123 let clean::Constant { type_, expr, value, is_literal } = constant;
124 Constant { type_: type_.into(), expr, value, is_literal }
128 impl From<clean::TypeBinding> for TypeBinding {
129 fn from(binding: clean::TypeBinding) -> Self {
130 TypeBinding { name: binding.name.to_string(), binding: binding.kind.into() }
134 impl From<clean::TypeBindingKind> for TypeBindingKind {
135 fn from(kind: clean::TypeBindingKind) -> Self {
136 use clean::TypeBindingKind::*;
138 Equality { ty } => TypeBindingKind::Equality(ty.into()),
139 Constraint { bounds } => {
140 TypeBindingKind::Constraint(bounds.into_iter().map(Into::into).collect())
146 impl From<DefId> for Id {
147 fn from(did: DefId) -> Self {
148 Id(format!("{}:{}", did.krate.as_u32(), u32::from(did.index)))
152 impl From<clean::ItemKind> for ItemEnum {
153 fn from(item: clean::ItemKind) -> Self {
154 use clean::ItemKind::*;
156 ModuleItem(m) => ItemEnum::ModuleItem(m.into()),
157 ExternCrateItem(c, a) => {
158 ItemEnum::ExternCrateItem { name: c.to_string(), rename: a.map(|x| x.to_string()) }
160 ImportItem(i) => ItemEnum::ImportItem(i.into()),
161 StructItem(s) => ItemEnum::StructItem(s.into()),
162 UnionItem(u) => ItemEnum::StructItem(u.into()),
163 StructFieldItem(f) => ItemEnum::StructFieldItem(f.into()),
164 EnumItem(e) => ItemEnum::EnumItem(e.into()),
165 VariantItem(v) => ItemEnum::VariantItem(v.into()),
166 FunctionItem(f) => ItemEnum::FunctionItem(f.into()),
167 ForeignFunctionItem(f) => ItemEnum::FunctionItem(f.into()),
168 TraitItem(t) => ItemEnum::TraitItem(t.into()),
169 TraitAliasItem(t) => ItemEnum::TraitAliasItem(t.into()),
170 MethodItem(m, _) => ItemEnum::MethodItem(m.into()),
171 TyMethodItem(m) => ItemEnum::MethodItem(m.into()),
172 ImplItem(i) => ItemEnum::ImplItem(i.into()),
173 StaticItem(s) => ItemEnum::StaticItem(s.into()),
174 ForeignStaticItem(s) => ItemEnum::StaticItem(s.into()),
175 ForeignTypeItem => ItemEnum::ForeignTypeItem,
176 TypedefItem(t, _) => ItemEnum::TypedefItem(t.into()),
177 OpaqueTyItem(t) => ItemEnum::OpaqueTyItem(t.into()),
178 ConstantItem(c) => ItemEnum::ConstantItem(c.into()),
179 MacroItem(m) => ItemEnum::MacroItem(m.source),
180 ProcMacroItem(m) => ItemEnum::ProcMacroItem(m.into()),
181 AssocConstItem(t, s) => ItemEnum::AssocConstItem { type_: t.into(), default: s },
182 AssocTypeItem(g, t) => ItemEnum::AssocTypeItem {
183 bounds: g.into_iter().map(Into::into).collect(),
184 default: t.map(Into::into),
186 StrippedItem(inner) => (*inner).into(),
187 PrimitiveItem(_) | KeywordItem(_) => {
188 panic!("{:?} is not supported for JSON output", item)
194 impl From<clean::Module> for Module {
195 fn from(module: clean::Module) -> Self {
196 Module { is_crate: module.is_crate, items: ids(module.items) }
200 impl From<clean::Struct> for Struct {
201 fn from(struct_: clean::Struct) -> Self {
202 let clean::Struct { struct_type, generics, fields, fields_stripped } = struct_;
204 struct_type: struct_type.into(),
205 generics: generics.into(),
208 impls: Vec::new(), // Added in JsonRenderer::item
213 impl From<clean::Union> for Struct {
214 fn from(struct_: clean::Union) -> Self {
215 let clean::Union { struct_type, generics, fields, fields_stripped } = struct_;
217 struct_type: struct_type.into(),
218 generics: generics.into(),
221 impls: Vec::new(), // Added in JsonRenderer::item
226 impl From<doctree::StructType> for StructType {
227 fn from(struct_type: doctree::StructType) -> Self {
228 use doctree::StructType::*;
230 Plain => StructType::Plain,
231 Tuple => StructType::Tuple,
232 Unit => StructType::Unit,
237 fn stringify_header(header: &rustc_hir::FnHeader) -> String {
238 let mut s = String::from(header.unsafety.prefix_str());
239 if header.asyncness == rustc_hir::IsAsync::Async {
242 if header.constness == rustc_hir::Constness::Const {
248 impl From<clean::Function> for Function {
249 fn from(function: clean::Function) -> Self {
250 let clean::Function { decl, generics, header, all_types: _, ret_types: _ } = function;
253 generics: generics.into(),
254 header: stringify_header(&header),
255 abi: header.abi.to_string(),
260 impl From<clean::Generics> for Generics {
261 fn from(generics: clean::Generics) -> Self {
263 params: generics.params.into_iter().map(Into::into).collect(),
264 where_predicates: generics.where_predicates.into_iter().map(Into::into).collect(),
269 impl From<clean::GenericParamDef> for GenericParamDef {
270 fn from(generic_param: clean::GenericParamDef) -> Self {
271 GenericParamDef { name: generic_param.name.to_string(), kind: generic_param.kind.into() }
275 impl From<clean::GenericParamDefKind> for GenericParamDefKind {
276 fn from(kind: clean::GenericParamDefKind) -> Self {
277 use clean::GenericParamDefKind::*;
279 Lifetime => GenericParamDefKind::Lifetime,
280 Type { did: _, bounds, default, synthetic: _ } => GenericParamDefKind::Type {
281 bounds: bounds.into_iter().map(Into::into).collect(),
282 default: default.map(Into::into),
284 Const { did: _, ty } => GenericParamDefKind::Const(ty.into()),
289 impl From<clean::WherePredicate> for WherePredicate {
290 fn from(predicate: clean::WherePredicate) -> Self {
291 use clean::WherePredicate::*;
293 BoundPredicate { ty, bounds } => WherePredicate::BoundPredicate {
295 bounds: bounds.into_iter().map(Into::into).collect(),
297 RegionPredicate { lifetime, bounds } => WherePredicate::RegionPredicate {
298 lifetime: lifetime.0.to_string(),
299 bounds: bounds.into_iter().map(Into::into).collect(),
301 EqPredicate { lhs, rhs } => {
302 WherePredicate::EqPredicate { lhs: lhs.into(), rhs: rhs.into() }
308 impl From<clean::GenericBound> for GenericBound {
309 fn from(bound: clean::GenericBound) -> Self {
310 use clean::GenericBound::*;
312 TraitBound(clean::PolyTrait { trait_, generic_params }, modifier) => {
313 GenericBound::TraitBound {
314 trait_: trait_.into(),
315 generic_params: generic_params.into_iter().map(Into::into).collect(),
316 modifier: modifier.into(),
319 Outlives(lifetime) => GenericBound::Outlives(lifetime.0.to_string()),
324 impl From<rustc_hir::TraitBoundModifier> for TraitBoundModifier {
325 fn from(modifier: rustc_hir::TraitBoundModifier) -> Self {
326 use rustc_hir::TraitBoundModifier::*;
328 None => TraitBoundModifier::None,
329 Maybe => TraitBoundModifier::Maybe,
330 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(),
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 is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,
379 generic_params: generic_params.into_iter().map(Into::into).collect(),
381 abi: abi.to_string(),
386 impl From<clean::FnDecl> for FnDecl {
387 fn from(decl: clean::FnDecl) -> Self {
388 let clean::FnDecl { inputs, output, c_variadic, attrs: _ } = decl;
393 .map(|arg| (arg.name.to_string(), arg.type_.into()))
395 output: match output {
396 clean::FnRetTy::Return(t) => Some(t.into()),
397 clean::FnRetTy::DefaultReturn => None,
404 impl From<clean::Trait> for Trait {
405 fn from(trait_: clean::Trait) -> Self {
406 let clean::Trait { unsafety, items, generics, bounds, is_spotlight: _, is_auto } = trait_;
409 is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,
411 generics: generics.into(),
412 bounds: bounds.into_iter().map(Into::into).collect(),
413 implementors: Vec::new(), // Added in JsonRenderer::item
418 impl From<clean::Impl> for Impl {
419 fn from(impl_: clean::Impl) -> Self {
423 provided_trait_methods,
432 is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,
433 generics: generics.into(),
434 provided_trait_methods: provided_trait_methods
436 .map(|x| x.to_string())
438 trait_: trait_.map(Into::into),
441 negative: polarity == Some(clean::ImplPolarity::Negative),
443 blanket_impl: blanket_impl.map(Into::into),
448 impl From<clean::Function> for Method {
449 fn from(function: clean::Function) -> Self {
450 let clean::Function { header, decl, generics, all_types: _, ret_types: _ } = function;
453 generics: generics.into(),
454 header: stringify_header(&header),
460 impl From<clean::Enum> for Enum {
461 fn from(enum_: clean::Enum) -> Self {
462 let clean::Enum { variants, generics, variants_stripped } = enum_;
464 generics: generics.into(),
466 variants: ids(variants),
467 impls: Vec::new(), // Added in JsonRenderer::item
472 impl From<clean::VariantStruct> for Struct {
473 fn from(struct_: clean::VariantStruct) -> Self {
474 let clean::VariantStruct { struct_type, fields, fields_stripped } = struct_;
476 struct_type: struct_type.into(),
477 generics: Default::default(),
485 impl From<clean::Variant> for Variant {
486 fn from(variant: clean::Variant) -> Self {
487 use clean::VariantKind::*;
489 CLike => Variant::Plain,
490 Tuple(t) => Variant::Tuple(t.into_iter().map(Into::into).collect()),
491 Struct(s) => Variant::Struct(ids(s.fields)),
496 impl From<clean::Import> for Import {
497 fn from(import: clean::Import) -> Self {
498 use clean::ImportKind::*;
500 Simple(s) => Import {
501 span: import.source.path.whole_name(),
503 id: import.source.did.map(Into::into),
507 span: import.source.path.whole_name(),
508 name: import.source.path.last_name().to_string(),
509 id: import.source.did.map(Into::into),
516 impl From<clean::ProcMacro> for ProcMacro {
517 fn from(mac: clean::ProcMacro) -> Self {
519 kind: mac.kind.into(),
520 helpers: mac.helpers.iter().map(|x| x.to_string()).collect(),
525 impl From<rustc_span::hygiene::MacroKind> for MacroKind {
526 fn from(kind: rustc_span::hygiene::MacroKind) -> Self {
527 use rustc_span::hygiene::MacroKind::*;
529 Bang => MacroKind::Bang,
530 Attr => MacroKind::Attr,
531 Derive => MacroKind::Derive,
536 impl From<clean::Typedef> for Typedef {
537 fn from(typedef: clean::Typedef) -> Self {
538 let clean::Typedef { type_, generics, item_type: _ } = typedef;
539 Typedef { type_: type_.into(), generics: generics.into() }
543 impl From<clean::OpaqueTy> for OpaqueTy {
544 fn from(opaque: clean::OpaqueTy) -> Self {
546 bounds: opaque.bounds.into_iter().map(Into::into).collect(),
547 generics: opaque.generics.into(),
552 impl From<clean::Static> for Static {
553 fn from(stat: clean::Static) -> Self {
555 type_: stat.type_.into(),
556 mutable: stat.mutability == ast::Mutability::Mut,
562 impl From<clean::TraitAlias> for TraitAlias {
563 fn from(alias: clean::TraitAlias) -> Self {
565 generics: alias.generics.into(),
566 params: alias.bounds.into_iter().map(Into::into).collect(),
571 impl From<ItemType> for ItemKind {
572 fn from(kind: ItemType) -> Self {
575 Module => ItemKind::Module,
576 ExternCrate => ItemKind::ExternCrate,
577 Import => ItemKind::Import,
578 Struct => ItemKind::Struct,
579 Union => ItemKind::Union,
580 Enum => ItemKind::Enum,
581 Function => ItemKind::Function,
582 Typedef => ItemKind::Typedef,
583 OpaqueTy => ItemKind::OpaqueTy,
584 Static => ItemKind::Static,
585 Constant => ItemKind::Constant,
586 Trait => ItemKind::Trait,
587 Impl => ItemKind::Impl,
588 TyMethod | Method => ItemKind::Method,
589 StructField => ItemKind::StructField,
590 Variant => ItemKind::Variant,
591 Macro => ItemKind::Macro,
592 Primitive => ItemKind::Primitive,
593 AssocConst => ItemKind::AssocConst,
594 AssocType => ItemKind::AssocType,
595 ForeignType => ItemKind::ForeignType,
596 Keyword => ItemKind::Keyword,
597 TraitAlias => ItemKind::TraitAlias,
598 ProcAttribute => ItemKind::ProcAttribute,
599 ProcDerive => ItemKind::ProcDerive,
604 fn ids(items: impl IntoIterator<Item = clean::Item>) -> Vec<Id> {
605 items.into_iter().filter(|x| !x.is_stripped()).map(|i| i.def_id.into()).collect()