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);
32 clean::StrippedItem(_) => None,
35 crate_id: def_id.krate.as_u32(),
36 name: name.map(|sym| sym.to_string()),
37 source: self.convert_span(source),
38 visibility: visibility.into(),
39 docs: attrs.collapsed_doc_value().unwrap_or_default(),
43 .filter_map(|clean::ItemLink { link, did, .. }| {
44 did.map(|did| (link, did.into()))
50 .map(rustc_ast_pretty::pprust::attribute_to_string)
52 deprecation: deprecation.map(Into::into),
53 kind: item_type.into(),
59 fn convert_span(&self, span: clean::Span) -> Option<Span> {
60 match span.filename(self.sess()) {
61 rustc_span::FileName::Real(name) => {
62 let hi = span.hi(self.sess());
63 let lo = span.lo(self.sess());
65 filename: match name {
66 rustc_span::RealFileName::Named(path) => path,
67 rustc_span::RealFileName::Devirtualized { local_path, virtual_name: _ } => {
71 begin: (lo.line, lo.col.to_usize()),
72 end: (hi.line, hi.col.to_usize()),
80 impl From<rustc_attr::Deprecation> for Deprecation {
81 fn from(deprecation: rustc_attr::Deprecation) -> Self {
83 let rustc_attr::Deprecation { since, note, is_since_rustc_version: _, suggestion: _ } = deprecation;
84 Deprecation { since: since.map(|s| s.to_string()), note: note.map(|s| s.to_string()) }
88 impl From<clean::Visibility> for Visibility {
89 fn from(v: clean::Visibility) -> Self {
90 use clean::Visibility::*;
92 Public => Visibility::Public,
93 Inherited => Visibility::Default,
94 Restricted(did, _) if did.index == CRATE_DEF_INDEX => Visibility::Crate,
95 Restricted(did, path) => Visibility::Restricted {
97 path: path.to_string_no_crate_verbose(),
103 impl From<clean::GenericArgs> for GenericArgs {
104 fn from(args: clean::GenericArgs) -> Self {
105 use clean::GenericArgs::*;
107 AngleBracketed { args, bindings } => GenericArgs::AngleBracketed {
108 args: args.into_iter().map(Into::into).collect(),
109 bindings: bindings.into_iter().map(Into::into).collect(),
111 Parenthesized { inputs, output } => GenericArgs::Parenthesized {
112 inputs: inputs.into_iter().map(Into::into).collect(),
113 output: output.map(Into::into),
119 impl From<clean::GenericArg> for GenericArg {
120 fn from(arg: clean::GenericArg) -> Self {
121 use clean::GenericArg::*;
123 Lifetime(l) => GenericArg::Lifetime(l.0.to_string()),
124 Type(t) => GenericArg::Type(t.into()),
125 Const(c) => GenericArg::Const(c.into()),
130 impl From<clean::Constant> for Constant {
131 fn from(constant: clean::Constant) -> Self {
132 let clean::Constant { type_, expr, value, is_literal } = constant;
133 Constant { type_: type_.into(), expr, value, is_literal }
137 impl From<clean::TypeBinding> for TypeBinding {
138 fn from(binding: clean::TypeBinding) -> Self {
139 TypeBinding { name: binding.name.to_string(), binding: binding.kind.into() }
143 impl From<clean::TypeBindingKind> for TypeBindingKind {
144 fn from(kind: clean::TypeBindingKind) -> Self {
145 use clean::TypeBindingKind::*;
147 Equality { ty } => TypeBindingKind::Equality(ty.into()),
148 Constraint { bounds } => {
149 TypeBindingKind::Constraint(bounds.into_iter().map(Into::into).collect())
155 impl From<DefId> for Id {
156 fn from(did: DefId) -> Self {
157 Id(format!("{}:{}", did.krate.as_u32(), u32::from(did.index)))
161 impl From<clean::ItemKind> for ItemEnum {
162 fn from(item: clean::ItemKind) -> Self {
163 use clean::ItemKind::*;
165 ModuleItem(m) => ItemEnum::ModuleItem(m.into()),
166 ExternCrateItem(c, a) => {
167 ItemEnum::ExternCrateItem { name: c.to_string(), rename: a.map(|x| x.to_string()) }
169 ImportItem(i) => ItemEnum::ImportItem(i.into()),
170 StructItem(s) => ItemEnum::StructItem(s.into()),
171 UnionItem(u) => ItemEnum::StructItem(u.into()),
172 StructFieldItem(f) => ItemEnum::StructFieldItem(f.into()),
173 EnumItem(e) => ItemEnum::EnumItem(e.into()),
174 VariantItem(v) => ItemEnum::VariantItem(v.into()),
175 FunctionItem(f) => ItemEnum::FunctionItem(f.into()),
176 ForeignFunctionItem(f) => ItemEnum::FunctionItem(f.into()),
177 TraitItem(t) => ItemEnum::TraitItem(t.into()),
178 TraitAliasItem(t) => ItemEnum::TraitAliasItem(t.into()),
179 MethodItem(m, _) => ItemEnum::MethodItem(m.into()),
180 TyMethodItem(m) => ItemEnum::MethodItem(m.into()),
181 ImplItem(i) => ItemEnum::ImplItem(i.into()),
182 StaticItem(s) => ItemEnum::StaticItem(s.into()),
183 ForeignStaticItem(s) => ItemEnum::StaticItem(s.into()),
184 ForeignTypeItem => ItemEnum::ForeignTypeItem,
185 TypedefItem(t, _) => ItemEnum::TypedefItem(t.into()),
186 OpaqueTyItem(t) => ItemEnum::OpaqueTyItem(t.into()),
187 ConstantItem(c) => ItemEnum::ConstantItem(c.into()),
188 MacroItem(m) => ItemEnum::MacroItem(m.source),
189 ProcMacroItem(m) => ItemEnum::ProcMacroItem(m.into()),
190 AssocConstItem(t, s) => ItemEnum::AssocConstItem { type_: t.into(), default: s },
191 AssocTypeItem(g, t) => ItemEnum::AssocTypeItem {
192 bounds: g.into_iter().map(Into::into).collect(),
193 default: t.map(Into::into),
195 StrippedItem(inner) => (*inner).into(),
196 PrimitiveItem(_) | KeywordItem(_) => {
197 panic!("{:?} is not supported for JSON output", item)
203 impl From<clean::Module> for Module {
204 fn from(module: clean::Module) -> Self {
205 Module { is_crate: module.is_crate, items: ids(module.items) }
209 impl From<clean::Struct> for Struct {
210 fn from(struct_: clean::Struct) -> Self {
211 let clean::Struct { struct_type, generics, fields, fields_stripped } = struct_;
213 struct_type: struct_type.into(),
214 generics: generics.into(),
217 impls: Vec::new(), // Added in JsonRenderer::item
222 impl From<clean::Union> for Struct {
223 fn from(struct_: clean::Union) -> Self {
224 let clean::Union { struct_type, generics, fields, fields_stripped } = struct_;
226 struct_type: struct_type.into(),
227 generics: generics.into(),
230 impls: Vec::new(), // Added in JsonRenderer::item
235 impl From<doctree::StructType> for StructType {
236 fn from(struct_type: doctree::StructType) -> Self {
237 use doctree::StructType::*;
239 Plain => StructType::Plain,
240 Tuple => StructType::Tuple,
241 Unit => StructType::Unit,
246 fn stringify_header(header: &rustc_hir::FnHeader) -> String {
247 let mut s = String::from(header.unsafety.prefix_str());
248 if header.asyncness == rustc_hir::IsAsync::Async {
251 if header.constness == rustc_hir::Constness::Const {
257 impl From<clean::Function> for Function {
258 fn from(function: clean::Function) -> Self {
259 let clean::Function { decl, generics, header, all_types: _, ret_types: _ } = function;
262 generics: generics.into(),
263 header: stringify_header(&header),
264 abi: header.abi.to_string(),
269 impl From<clean::Generics> for Generics {
270 fn from(generics: clean::Generics) -> Self {
272 params: generics.params.into_iter().map(Into::into).collect(),
273 where_predicates: generics.where_predicates.into_iter().map(Into::into).collect(),
278 impl From<clean::GenericParamDef> for GenericParamDef {
279 fn from(generic_param: clean::GenericParamDef) -> Self {
280 GenericParamDef { name: generic_param.name.to_string(), kind: generic_param.kind.into() }
284 impl From<clean::GenericParamDefKind> for GenericParamDefKind {
285 fn from(kind: clean::GenericParamDefKind) -> Self {
286 use clean::GenericParamDefKind::*;
288 Lifetime => GenericParamDefKind::Lifetime,
289 Type { did: _, bounds, default, synthetic: _ } => GenericParamDefKind::Type {
290 bounds: bounds.into_iter().map(Into::into).collect(),
291 default: default.map(Into::into),
293 Const { did: _, ty } => GenericParamDefKind::Const(ty.into()),
298 impl From<clean::WherePredicate> for WherePredicate {
299 fn from(predicate: clean::WherePredicate) -> Self {
300 use clean::WherePredicate::*;
302 BoundPredicate { ty, bounds } => WherePredicate::BoundPredicate {
304 bounds: bounds.into_iter().map(Into::into).collect(),
306 RegionPredicate { lifetime, bounds } => WherePredicate::RegionPredicate {
307 lifetime: lifetime.0.to_string(),
308 bounds: bounds.into_iter().map(Into::into).collect(),
310 EqPredicate { lhs, rhs } => {
311 WherePredicate::EqPredicate { lhs: lhs.into(), rhs: rhs.into() }
317 impl From<clean::GenericBound> for GenericBound {
318 fn from(bound: clean::GenericBound) -> Self {
319 use clean::GenericBound::*;
321 TraitBound(clean::PolyTrait { trait_, generic_params }, modifier) => {
322 GenericBound::TraitBound {
323 trait_: trait_.into(),
324 generic_params: generic_params.into_iter().map(Into::into).collect(),
325 modifier: modifier.into(),
328 Outlives(lifetime) => GenericBound::Outlives(lifetime.0.to_string()),
333 impl From<rustc_hir::TraitBoundModifier> for TraitBoundModifier {
334 fn from(modifier: rustc_hir::TraitBoundModifier) -> Self {
335 use rustc_hir::TraitBoundModifier::*;
337 None => TraitBoundModifier::None,
338 Maybe => TraitBoundModifier::Maybe,
339 MaybeConst => TraitBoundModifier::MaybeConst,
344 impl From<clean::Type> for Type {
345 fn from(ty: clean::Type) -> Self {
348 ResolvedPath { path, param_names, did, is_generic: _ } => Type::ResolvedPath {
349 name: path.whole_name(),
351 args: path.segments.last().map(|args| Box::new(args.clone().args.into())),
352 param_names: param_names
353 .map(|v| v.into_iter().map(Into::into).collect())
354 .unwrap_or_default(),
356 Generic(s) => Type::Generic(s.to_string()),
357 Primitive(p) => Type::Primitive(p.as_str().to_string()),
358 BareFunction(f) => Type::FunctionPointer(Box::new((*f).into())),
359 Tuple(t) => Type::Tuple(t.into_iter().map(Into::into).collect()),
360 Slice(t) => Type::Slice(Box::new((*t).into())),
361 Array(t, s) => Type::Array { type_: Box::new((*t).into()), len: s },
362 ImplTrait(g) => Type::ImplTrait(g.into_iter().map(Into::into).collect()),
363 Never => Type::Never,
364 Infer => Type::Infer,
365 RawPointer(mutability, type_) => Type::RawPointer {
366 mutable: mutability == ast::Mutability::Mut,
367 type_: Box::new((*type_).into()),
369 BorrowedRef { lifetime, mutability, type_ } => Type::BorrowedRef {
370 lifetime: lifetime.map(|l| l.0.to_string()),
371 mutable: mutability == ast::Mutability::Mut,
372 type_: Box::new((*type_).into()),
374 QPath { name, self_type, trait_ } => Type::QualifiedPath {
375 name: name.to_string(),
376 self_type: Box::new((*self_type).into()),
377 trait_: Box::new((*trait_).into()),
383 impl From<clean::BareFunctionDecl> for FunctionPointer {
384 fn from(bare_decl: clean::BareFunctionDecl) -> Self {
385 let clean::BareFunctionDecl { unsafety, generic_params, decl, abi } = bare_decl;
387 is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,
388 generic_params: generic_params.into_iter().map(Into::into).collect(),
390 abi: abi.to_string(),
395 impl From<clean::FnDecl> for FnDecl {
396 fn from(decl: clean::FnDecl) -> Self {
397 let clean::FnDecl { inputs, output, c_variadic, attrs: _ } = decl;
402 .map(|arg| (arg.name.to_string(), arg.type_.into()))
404 output: match output {
405 clean::FnRetTy::Return(t) => Some(t.into()),
406 clean::FnRetTy::DefaultReturn => None,
413 impl From<clean::Trait> for Trait {
414 fn from(trait_: clean::Trait) -> Self {
415 let clean::Trait { unsafety, items, generics, bounds, is_spotlight: _, is_auto } = trait_;
418 is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,
420 generics: generics.into(),
421 bounds: bounds.into_iter().map(Into::into).collect(),
422 implementors: Vec::new(), // Added in JsonRenderer::item
427 impl From<clean::Impl> for Impl {
428 fn from(impl_: clean::Impl) -> Self {
432 provided_trait_methods,
441 is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,
442 generics: generics.into(),
443 provided_trait_methods: provided_trait_methods
445 .map(|x| x.to_string())
447 trait_: trait_.map(Into::into),
450 negative: polarity == Some(clean::ImplPolarity::Negative),
452 blanket_impl: blanket_impl.map(Into::into),
457 impl From<clean::Function> for Method {
458 fn from(function: clean::Function) -> Self {
459 let clean::Function { header, decl, generics, all_types: _, ret_types: _ } = function;
462 generics: generics.into(),
463 header: stringify_header(&header),
469 impl From<clean::Enum> for Enum {
470 fn from(enum_: clean::Enum) -> Self {
471 let clean::Enum { variants, generics, variants_stripped } = enum_;
473 generics: generics.into(),
475 variants: ids(variants),
476 impls: Vec::new(), // Added in JsonRenderer::item
481 impl From<clean::VariantStruct> for Struct {
482 fn from(struct_: clean::VariantStruct) -> Self {
483 let clean::VariantStruct { struct_type, fields, fields_stripped } = struct_;
485 struct_type: struct_type.into(),
486 generics: Default::default(),
494 impl From<clean::Variant> for Variant {
495 fn from(variant: clean::Variant) -> Self {
496 use clean::VariantKind::*;
498 CLike => Variant::Plain,
499 Tuple(t) => Variant::Tuple(t.into_iter().map(Into::into).collect()),
500 Struct(s) => Variant::Struct(ids(s.fields)),
505 impl From<clean::Import> for Import {
506 fn from(import: clean::Import) -> Self {
507 use clean::ImportKind::*;
509 Simple(s) => Import {
510 span: import.source.path.whole_name(),
512 id: import.source.did.map(Into::into),
516 span: import.source.path.whole_name(),
517 name: import.source.path.last_name().to_string(),
518 id: import.source.did.map(Into::into),
525 impl From<clean::ProcMacro> for ProcMacro {
526 fn from(mac: clean::ProcMacro) -> Self {
528 kind: mac.kind.into(),
529 helpers: mac.helpers.iter().map(|x| x.to_string()).collect(),
534 impl From<rustc_span::hygiene::MacroKind> for MacroKind {
535 fn from(kind: rustc_span::hygiene::MacroKind) -> Self {
536 use rustc_span::hygiene::MacroKind::*;
538 Bang => MacroKind::Bang,
539 Attr => MacroKind::Attr,
540 Derive => MacroKind::Derive,
545 impl From<clean::Typedef> for Typedef {
546 fn from(typedef: clean::Typedef) -> Self {
547 let clean::Typedef { type_, generics, item_type: _ } = typedef;
548 Typedef { type_: type_.into(), generics: generics.into() }
552 impl From<clean::OpaqueTy> for OpaqueTy {
553 fn from(opaque: clean::OpaqueTy) -> Self {
555 bounds: opaque.bounds.into_iter().map(Into::into).collect(),
556 generics: opaque.generics.into(),
561 impl From<clean::Static> for Static {
562 fn from(stat: clean::Static) -> Self {
564 type_: stat.type_.into(),
565 mutable: stat.mutability == ast::Mutability::Mut,
571 impl From<clean::TraitAlias> for TraitAlias {
572 fn from(alias: clean::TraitAlias) -> Self {
574 generics: alias.generics.into(),
575 params: alias.bounds.into_iter().map(Into::into).collect(),
580 impl From<ItemType> for ItemKind {
581 fn from(kind: ItemType) -> Self {
584 Module => ItemKind::Module,
585 ExternCrate => ItemKind::ExternCrate,
586 Import => ItemKind::Import,
587 Struct => ItemKind::Struct,
588 Union => ItemKind::Union,
589 Enum => ItemKind::Enum,
590 Function => ItemKind::Function,
591 Typedef => ItemKind::Typedef,
592 OpaqueTy => ItemKind::OpaqueTy,
593 Static => ItemKind::Static,
594 Constant => ItemKind::Constant,
595 Trait => ItemKind::Trait,
596 Impl => ItemKind::Impl,
597 TyMethod | Method => ItemKind::Method,
598 StructField => ItemKind::StructField,
599 Variant => ItemKind::Variant,
600 Macro => ItemKind::Macro,
601 Primitive => ItemKind::Primitive,
602 AssocConst => ItemKind::AssocConst,
603 AssocType => ItemKind::AssocType,
604 ForeignType => ItemKind::ForeignType,
605 Keyword => ItemKind::Keyword,
606 TraitAlias => ItemKind::TraitAlias,
607 ProcAttribute => ItemKind::ProcAttribute,
608 ProcDerive => ItemKind::ProcDerive,
613 fn ids(items: impl IntoIterator<Item = clean::Item>) -> Vec<Id> {
614 items.into_iter().filter(|x| !x.is_stripped()).map(|i| i.def_id.into()).collect()