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: self.convert_visibility(visibility),
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()),
70 fn convert_visibility(&self, v: clean::Visibility) -> Visibility {
71 use clean::Visibility::*;
73 Public => Visibility::Public,
74 Inherited => Visibility::Default,
75 Restricted(did) if did.index == CRATE_DEF_INDEX => Visibility::Crate,
76 Restricted(did) => Visibility::Restricted {
78 path: self.tcx.def_path(did).to_string_no_crate_verbose(),
84 impl From<rustc_attr::Deprecation> for Deprecation {
85 fn from(deprecation: rustc_attr::Deprecation) -> Self {
87 let rustc_attr::Deprecation { since, note, is_since_rustc_version: _, suggestion: _ } = deprecation;
88 Deprecation { since: since.map(|s| s.to_string()), note: note.map(|s| s.to_string()) }
92 impl From<clean::GenericArgs> for GenericArgs {
93 fn from(args: clean::GenericArgs) -> Self {
94 use clean::GenericArgs::*;
96 AngleBracketed { args, bindings } => GenericArgs::AngleBracketed {
97 args: args.into_iter().map(Into::into).collect(),
98 bindings: bindings.into_iter().map(Into::into).collect(),
100 Parenthesized { inputs, output } => GenericArgs::Parenthesized {
101 inputs: inputs.into_iter().map(Into::into).collect(),
102 output: output.map(Into::into),
108 impl From<clean::GenericArg> for GenericArg {
109 fn from(arg: clean::GenericArg) -> Self {
110 use clean::GenericArg::*;
112 Lifetime(l) => GenericArg::Lifetime(l.0.to_string()),
113 Type(t) => GenericArg::Type(t.into()),
114 Const(c) => GenericArg::Const(c.into()),
119 impl From<clean::Constant> for Constant {
120 fn from(constant: clean::Constant) -> Self {
121 let clean::Constant { type_, expr, value, is_literal } = constant;
122 Constant { type_: type_.into(), expr, value, is_literal }
126 impl From<clean::TypeBinding> for TypeBinding {
127 fn from(binding: clean::TypeBinding) -> Self {
128 TypeBinding { name: binding.name.to_string(), binding: binding.kind.into() }
132 impl From<clean::TypeBindingKind> for TypeBindingKind {
133 fn from(kind: clean::TypeBindingKind) -> Self {
134 use clean::TypeBindingKind::*;
136 Equality { ty } => TypeBindingKind::Equality(ty.into()),
137 Constraint { bounds } => {
138 TypeBindingKind::Constraint(bounds.into_iter().map(Into::into).collect())
144 impl From<DefId> for Id {
145 fn from(did: DefId) -> Self {
146 Id(format!("{}:{}", did.krate.as_u32(), u32::from(did.index)))
150 impl From<clean::ItemKind> for ItemEnum {
151 fn from(item: clean::ItemKind) -> Self {
152 use clean::ItemKind::*;
154 ModuleItem(m) => ItemEnum::ModuleItem(m.into()),
155 ExternCrateItem(c, a) => {
156 ItemEnum::ExternCrateItem { name: c.to_string(), rename: a.map(|x| x.to_string()) }
158 ImportItem(i) => ItemEnum::ImportItem(i.into()),
159 StructItem(s) => ItemEnum::StructItem(s.into()),
160 UnionItem(u) => ItemEnum::StructItem(u.into()),
161 StructFieldItem(f) => ItemEnum::StructFieldItem(f.into()),
162 EnumItem(e) => ItemEnum::EnumItem(e.into()),
163 VariantItem(v) => ItemEnum::VariantItem(v.into()),
164 FunctionItem(f) => ItemEnum::FunctionItem(f.into()),
165 ForeignFunctionItem(f) => ItemEnum::FunctionItem(f.into()),
166 TraitItem(t) => ItemEnum::TraitItem(t.into()),
167 TraitAliasItem(t) => ItemEnum::TraitAliasItem(t.into()),
168 MethodItem(m, _) => ItemEnum::MethodItem(m.into()),
169 TyMethodItem(m) => ItemEnum::MethodItem(m.into()),
170 ImplItem(i) => ItemEnum::ImplItem(i.into()),
171 StaticItem(s) => ItemEnum::StaticItem(s.into()),
172 ForeignStaticItem(s) => ItemEnum::StaticItem(s.into()),
173 ForeignTypeItem => ItemEnum::ForeignTypeItem,
174 TypedefItem(t, _) => ItemEnum::TypedefItem(t.into()),
175 OpaqueTyItem(t) => ItemEnum::OpaqueTyItem(t.into()),
176 ConstantItem(c) => ItemEnum::ConstantItem(c.into()),
177 MacroItem(m) => ItemEnum::MacroItem(m.source),
178 ProcMacroItem(m) => ItemEnum::ProcMacroItem(m.into()),
179 AssocConstItem(t, s) => ItemEnum::AssocConstItem { type_: t.into(), default: s },
180 AssocTypeItem(g, t) => ItemEnum::AssocTypeItem {
181 bounds: g.into_iter().map(Into::into).collect(),
182 default: t.map(Into::into),
184 StrippedItem(inner) => (*inner).into(),
185 PrimitiveItem(_) | KeywordItem(_) => {
186 panic!("{:?} is not supported for JSON output", item)
192 impl From<clean::Module> for Module {
193 fn from(module: clean::Module) -> Self {
194 Module { is_crate: module.is_crate, items: ids(module.items) }
198 impl From<clean::Struct> for Struct {
199 fn from(struct_: clean::Struct) -> Self {
200 let clean::Struct { struct_type, generics, fields, fields_stripped } = struct_;
202 struct_type: struct_type.into(),
203 generics: generics.into(),
206 impls: Vec::new(), // Added in JsonRenderer::item
211 impl From<clean::Union> for Struct {
212 fn from(struct_: clean::Union) -> Self {
213 let clean::Union { struct_type, generics, fields, fields_stripped } = struct_;
215 struct_type: struct_type.into(),
216 generics: generics.into(),
219 impls: Vec::new(), // Added in JsonRenderer::item
224 impl From<doctree::StructType> for StructType {
225 fn from(struct_type: doctree::StructType) -> Self {
226 use doctree::StructType::*;
228 Plain => StructType::Plain,
229 Tuple => StructType::Tuple,
230 Unit => StructType::Unit,
235 fn stringify_header(header: &rustc_hir::FnHeader) -> String {
236 let mut s = String::from(header.unsafety.prefix_str());
237 if header.asyncness == rustc_hir::IsAsync::Async {
240 if header.constness == rustc_hir::Constness::Const {
246 impl From<clean::Function> for Function {
247 fn from(function: clean::Function) -> Self {
248 let clean::Function { decl, generics, header, all_types: _, ret_types: _ } = function;
251 generics: generics.into(),
252 header: stringify_header(&header),
253 abi: header.abi.to_string(),
258 impl From<clean::Generics> for Generics {
259 fn from(generics: clean::Generics) -> Self {
261 params: generics.params.into_iter().map(Into::into).collect(),
262 where_predicates: generics.where_predicates.into_iter().map(Into::into).collect(),
267 impl From<clean::GenericParamDef> for GenericParamDef {
268 fn from(generic_param: clean::GenericParamDef) -> Self {
269 GenericParamDef { name: generic_param.name.to_string(), kind: generic_param.kind.into() }
273 impl From<clean::GenericParamDefKind> for GenericParamDefKind {
274 fn from(kind: clean::GenericParamDefKind) -> Self {
275 use clean::GenericParamDefKind::*;
277 Lifetime => GenericParamDefKind::Lifetime,
278 Type { did: _, bounds, default, synthetic: _ } => GenericParamDefKind::Type {
279 bounds: bounds.into_iter().map(Into::into).collect(),
280 default: default.map(Into::into),
282 Const { did: _, ty } => GenericParamDefKind::Const(ty.into()),
287 impl From<clean::WherePredicate> for WherePredicate {
288 fn from(predicate: clean::WherePredicate) -> Self {
289 use clean::WherePredicate::*;
291 BoundPredicate { ty, bounds } => WherePredicate::BoundPredicate {
293 bounds: bounds.into_iter().map(Into::into).collect(),
295 RegionPredicate { lifetime, bounds } => WherePredicate::RegionPredicate {
296 lifetime: lifetime.0.to_string(),
297 bounds: bounds.into_iter().map(Into::into).collect(),
299 EqPredicate { lhs, rhs } => {
300 WherePredicate::EqPredicate { lhs: lhs.into(), rhs: rhs.into() }
306 impl From<clean::GenericBound> for GenericBound {
307 fn from(bound: clean::GenericBound) -> Self {
308 use clean::GenericBound::*;
310 TraitBound(clean::PolyTrait { trait_, generic_params }, modifier) => {
311 GenericBound::TraitBound {
312 trait_: trait_.into(),
313 generic_params: generic_params.into_iter().map(Into::into).collect(),
314 modifier: modifier.into(),
317 Outlives(lifetime) => GenericBound::Outlives(lifetime.0.to_string()),
322 impl From<rustc_hir::TraitBoundModifier> for TraitBoundModifier {
323 fn from(modifier: rustc_hir::TraitBoundModifier) -> Self {
324 use rustc_hir::TraitBoundModifier::*;
326 None => TraitBoundModifier::None,
327 Maybe => TraitBoundModifier::Maybe,
328 MaybeConst => TraitBoundModifier::MaybeConst,
333 impl From<clean::Type> for Type {
334 fn from(ty: clean::Type) -> Self {
337 ResolvedPath { path, param_names, did, is_generic: _ } => Type::ResolvedPath {
338 name: path.whole_name(),
340 args: path.segments.last().map(|args| Box::new(args.clone().args.into())),
341 param_names: param_names
342 .map(|v| v.into_iter().map(Into::into).collect())
343 .unwrap_or_default(),
345 Generic(s) => Type::Generic(s.to_string()),
346 Primitive(p) => Type::Primitive(p.as_str().to_string()),
347 BareFunction(f) => Type::FunctionPointer(Box::new((*f).into())),
348 Tuple(t) => Type::Tuple(t.into_iter().map(Into::into).collect()),
349 Slice(t) => Type::Slice(Box::new((*t).into())),
350 Array(t, s) => Type::Array { type_: Box::new((*t).into()), len: s },
351 ImplTrait(g) => Type::ImplTrait(g.into_iter().map(Into::into).collect()),
352 Never => Type::Never,
353 Infer => Type::Infer,
354 RawPointer(mutability, type_) => Type::RawPointer {
355 mutable: mutability == ast::Mutability::Mut,
356 type_: Box::new((*type_).into()),
358 BorrowedRef { lifetime, mutability, type_ } => Type::BorrowedRef {
359 lifetime: lifetime.map(|l| l.0.to_string()),
360 mutable: mutability == ast::Mutability::Mut,
361 type_: Box::new((*type_).into()),
363 QPath { name, self_type, trait_ } => Type::QualifiedPath {
364 name: name.to_string(),
365 self_type: Box::new((*self_type).into()),
366 trait_: Box::new((*trait_).into()),
372 impl From<clean::BareFunctionDecl> for FunctionPointer {
373 fn from(bare_decl: clean::BareFunctionDecl) -> Self {
374 let clean::BareFunctionDecl { unsafety, generic_params, decl, abi } = bare_decl;
376 is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,
377 generic_params: generic_params.into_iter().map(Into::into).collect(),
379 abi: abi.to_string(),
384 impl From<clean::FnDecl> for FnDecl {
385 fn from(decl: clean::FnDecl) -> Self {
386 let clean::FnDecl { inputs, output, c_variadic, attrs: _ } = decl;
391 .map(|arg| (arg.name.to_string(), arg.type_.into()))
393 output: match output {
394 clean::FnRetTy::Return(t) => Some(t.into()),
395 clean::FnRetTy::DefaultReturn => None,
402 impl From<clean::Trait> for Trait {
403 fn from(trait_: clean::Trait) -> Self {
404 let clean::Trait { unsafety, items, generics, bounds, is_spotlight: _, is_auto } = trait_;
407 is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,
409 generics: generics.into(),
410 bounds: bounds.into_iter().map(Into::into).collect(),
411 implementors: Vec::new(), // Added in JsonRenderer::item
416 impl From<clean::Impl> for Impl {
417 fn from(impl_: clean::Impl) -> Self {
421 provided_trait_methods,
430 is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,
431 generics: generics.into(),
432 provided_trait_methods: provided_trait_methods
434 .map(|x| x.to_string())
436 trait_: trait_.map(Into::into),
439 negative: polarity == Some(clean::ImplPolarity::Negative),
441 blanket_impl: blanket_impl.map(Into::into),
446 impl From<clean::Function> for Method {
447 fn from(function: clean::Function) -> Self {
448 let clean::Function { header, decl, generics, all_types: _, ret_types: _ } = function;
451 generics: generics.into(),
452 header: stringify_header(&header),
458 impl From<clean::Enum> for Enum {
459 fn from(enum_: clean::Enum) -> Self {
460 let clean::Enum { variants, generics, variants_stripped } = enum_;
462 generics: generics.into(),
464 variants: ids(variants),
465 impls: Vec::new(), // Added in JsonRenderer::item
470 impl From<clean::VariantStruct> for Struct {
471 fn from(struct_: clean::VariantStruct) -> Self {
472 let clean::VariantStruct { struct_type, fields, fields_stripped } = struct_;
474 struct_type: struct_type.into(),
475 generics: Default::default(),
483 impl From<clean::Variant> for Variant {
484 fn from(variant: clean::Variant) -> Self {
485 use clean::VariantKind::*;
487 CLike => Variant::Plain,
488 Tuple(t) => Variant::Tuple(t.into_iter().map(Into::into).collect()),
489 Struct(s) => Variant::Struct(ids(s.fields)),
494 impl From<clean::Import> for Import {
495 fn from(import: clean::Import) -> Self {
496 use clean::ImportKind::*;
498 Simple(s) => Import {
499 span: import.source.path.whole_name(),
501 id: import.source.did.map(Into::into),
505 span: import.source.path.whole_name(),
506 name: import.source.path.last_name().to_string(),
507 id: import.source.did.map(Into::into),
514 impl From<clean::ProcMacro> for ProcMacro {
515 fn from(mac: clean::ProcMacro) -> Self {
517 kind: mac.kind.into(),
518 helpers: mac.helpers.iter().map(|x| x.to_string()).collect(),
523 impl From<rustc_span::hygiene::MacroKind> for MacroKind {
524 fn from(kind: rustc_span::hygiene::MacroKind) -> Self {
525 use rustc_span::hygiene::MacroKind::*;
527 Bang => MacroKind::Bang,
528 Attr => MacroKind::Attr,
529 Derive => MacroKind::Derive,
534 impl From<clean::Typedef> for Typedef {
535 fn from(typedef: clean::Typedef) -> Self {
536 let clean::Typedef { type_, generics, item_type: _ } = typedef;
537 Typedef { type_: type_.into(), generics: generics.into() }
541 impl From<clean::OpaqueTy> for OpaqueTy {
542 fn from(opaque: clean::OpaqueTy) -> Self {
544 bounds: opaque.bounds.into_iter().map(Into::into).collect(),
545 generics: opaque.generics.into(),
550 impl From<clean::Static> for Static {
551 fn from(stat: clean::Static) -> Self {
553 type_: stat.type_.into(),
554 mutable: stat.mutability == ast::Mutability::Mut,
560 impl From<clean::TraitAlias> for TraitAlias {
561 fn from(alias: clean::TraitAlias) -> Self {
563 generics: alias.generics.into(),
564 params: alias.bounds.into_iter().map(Into::into).collect(),
569 impl From<ItemType> for ItemKind {
570 fn from(kind: ItemType) -> Self {
573 Module => ItemKind::Module,
574 ExternCrate => ItemKind::ExternCrate,
575 Import => ItemKind::Import,
576 Struct => ItemKind::Struct,
577 Union => ItemKind::Union,
578 Enum => ItemKind::Enum,
579 Function => ItemKind::Function,
580 Typedef => ItemKind::Typedef,
581 OpaqueTy => ItemKind::OpaqueTy,
582 Static => ItemKind::Static,
583 Constant => ItemKind::Constant,
584 Trait => ItemKind::Trait,
585 Impl => ItemKind::Impl,
586 TyMethod | Method => ItemKind::Method,
587 StructField => ItemKind::StructField,
588 Variant => ItemKind::Variant,
589 Macro => ItemKind::Macro,
590 Primitive => ItemKind::Primitive,
591 AssocConst => ItemKind::AssocConst,
592 AssocType => ItemKind::AssocType,
593 ForeignType => ItemKind::ForeignType,
594 Keyword => ItemKind::Keyword,
595 TraitAlias => ItemKind::TraitAlias,
596 ProcAttribute => ItemKind::ProcAttribute,
597 ProcDerive => ItemKind::ProcDerive,
602 fn ids(items: impl IntoIterator<Item = clean::Item>) -> Vec<Id> {
603 items.into_iter().filter(|x| !x.is_stripped()).map(|i| i.def_id.into()).collect()