1 //! This module generates [moniker](https://microsoft.github.io/language-server-protocol/specifications/lsif/0.6.0/specification/#exportsImports)
4 use hir::{db::DefDatabase, AsAssocItem, AssocItemContainer, Crate, Name, Semantics};
6 base_db::{CrateOrigin, FileId, FileLoader, FilePosition},
7 defs::{Definition, IdentClass},
8 helpers::pick_best_token,
11 use itertools::Itertools;
12 use syntax::{AstNode, SyntaxKind::*, T};
14 use crate::{doc_links::token_as_doc_comment, RangeInfo};
16 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
17 pub struct MonikerIdentifier {
22 impl ToString for MonikerIdentifier {
23 fn to_string(&self) -> String {
25 MonikerIdentifier { path, crate_name } => {
26 format!("{}::{}", crate_name, path.iter().map(|x| x.to_string()).join("::"))
32 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
33 pub enum MonikerKind {
38 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
39 pub struct MonikerResult {
40 pub identifier: MonikerIdentifier,
41 pub kind: MonikerKind,
42 pub package_information: PackageInformation,
45 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
46 pub struct PackageInformation {
52 pub(crate) fn crate_for_file(db: &RootDatabase, file_id: FileId) -> Option<Crate> {
53 for &krate in db.relevant_crates(file_id).iter() {
54 let crate_def_map = db.crate_def_map(krate);
55 for (_, data) in crate_def_map.modules() {
56 if data.origin.file_id() == Some(file_id) {
57 return Some(krate.into());
64 pub(crate) fn moniker(
66 FilePosition { file_id, offset }: FilePosition,
67 ) -> Option<RangeInfo<Vec<MonikerResult>>> {
68 let sema = &Semantics::new(db);
69 let file = sema.parse(file_id).syntax().clone();
70 let current_crate = crate_for_file(db, file_id)?;
71 let original_token = pick_best_token(file.token_at_offset(offset), |kind| match kind {
72 IDENT | INT_NUMBER | LIFETIME_IDENT | T![self] | T![super] | T![crate] | COMMENT => 2,
73 kind if kind.is_trivia() => 0,
76 if let Some(doc_comment) = token_as_doc_comment(&original_token) {
77 return doc_comment.get_definition_with_descend_at(sema, offset, |def, _, _| {
78 let m = def_to_moniker(db, def, current_crate)?;
79 Some(RangeInfo::new(original_token.text_range(), vec![m]))
83 .descend_into_macros(original_token.clone())
86 IdentClass::classify_token(sema, &token).map(IdentClass::definitions).map(|it| {
87 it.into_iter().flat_map(|def| def_to_moniker(sema.db, def, current_crate))
93 Some(RangeInfo::new(original_token.text_range(), navs))
96 pub(crate) fn def_to_moniker(
100 ) -> Option<MonikerResult> {
101 if matches!(def, Definition::GenericParam(_) | Definition::SelfType(_) | Definition::Local(_)) {
104 let module = def.module(db)?;
105 let krate = module.krate();
106 let mut path = vec![];
107 path.extend(module.path_to_root(db).into_iter().filter_map(|x| x.name(db)));
109 // Handle associated items within a trait
110 if let Some(assoc) = def.as_assoc_item(db) {
111 let container = assoc.container(db);
113 AssocItemContainer::Trait(trait_) => {
114 // Because different traits can have functions with the same name,
115 // we have to include the trait name as part of the moniker for uniqueness.
116 path.push(trait_.name(db));
118 AssocItemContainer::Impl(impl_) => {
119 // Because a struct can implement multiple traits, for implementations
120 // we add both the struct name and the trait name to the path
121 if let Some(adt) = impl_.self_ty(db).as_adt() {
122 path.push(adt.name(db));
125 if let Some(trait_) = impl_.trait_(db) {
126 path.push(trait_.name(db));
132 if let Definition::Field(it) = def {
133 path.push(it.parent_def(db).name(db));
136 path.push(def.name(db)?);
138 identifier: MonikerIdentifier {
139 crate_name: krate.display_name(db)?.crate_name().to_string(),
142 kind: if krate == from_crate { MonikerKind::Export } else { MonikerKind::Import },
143 package_information: {
144 let name = krate.display_name(db)?.to_string();
145 let (repo, version) = match krate.origin(db) {
146 CrateOrigin::CratesIo { repo } => (repo?, krate.version(db)?),
147 CrateOrigin::Lang => (
148 "https://github.com/rust-lang/rust/".to_string(),
149 "compiler_version".to_string(),
151 CrateOrigin::Unknown => return None,
153 PackageInformation { name, repo, version }
162 use super::MonikerKind;
165 fn no_moniker(ra_fixture: &str) {
166 let (analysis, position) = fixture::position(ra_fixture);
167 if let Some(x) = analysis.moniker(position).unwrap() {
168 assert_eq!(x.info.len(), 0, "Moniker founded but no moniker expected: {:?}", x);
173 fn check_moniker(ra_fixture: &str, identifier: &str, package: &str, kind: MonikerKind) {
174 let (analysis, position) = fixture::position(ra_fixture);
175 let x = analysis.moniker(position).unwrap().expect("no moniker found").info;
176 assert_eq!(x.len(), 1);
177 let x = x.into_iter().next().unwrap();
178 assert_eq!(identifier, x.identifier.to_string());
179 assert_eq!(package, format!("{:?}", x.package_information));
180 assert_eq!(kind, x.kind);
187 //- /lib.rs crate:main deps:foo
188 use foo::module::func;
192 //- /foo/lib.rs crate:foo@CratesIo:0.1.0,https://a.b/foo.git
198 r#"PackageInformation { name: "foo", repo: "https://a.b/foo.git", version: "0.1.0" }"#,
203 //- /lib.rs crate:main deps:foo
204 use foo::module::func;
208 //- /foo/lib.rs crate:foo@CratesIo:0.1.0,https://a.b/foo.git
214 r#"PackageInformation { name: "foo", repo: "https://a.b/foo.git", version: "0.1.0" }"#,
220 fn moniker_for_trait() {
223 //- /foo/lib.rs crate:foo@CratesIo:0.1.0,https://a.b/foo.git
230 "foo::module::MyTrait::func",
231 r#"PackageInformation { name: "foo", repo: "https://a.b/foo.git", version: "0.1.0" }"#,
237 fn moniker_for_trait_constant() {
240 //- /foo/lib.rs crate:foo@CratesIo:0.1.0,https://a.b/foo.git
243 const MY_CONST$0: u8;
247 "foo::module::MyTrait::MY_CONST",
248 r#"PackageInformation { name: "foo", repo: "https://a.b/foo.git", version: "0.1.0" }"#,
254 fn moniker_for_trait_type() {
257 //- /foo/lib.rs crate:foo@CratesIo:0.1.0,https://a.b/foo.git
264 "foo::module::MyTrait::MyType",
265 r#"PackageInformation { name: "foo", repo: "https://a.b/foo.git", version: "0.1.0" }"#,
271 fn moniker_for_trait_impl_function() {
274 //- /foo/lib.rs crate:foo@CratesIo:0.1.0,https://a.b/foo.git
282 impl MyTrait for MyStruct {
287 "foo::module::MyStruct::MyTrait::func",
288 r#"PackageInformation { name: "foo", repo: "https://a.b/foo.git", version: "0.1.0" }"#,
294 fn moniker_for_field() {
297 //- /lib.rs crate:main deps:foo
300 let x = St { a$0: 2 };
302 //- /foo/lib.rs crate:foo@CratesIo:0.1.0,https://a.b/foo.git
308 r#"PackageInformation { name: "foo", repo: "https://a.b/foo.git", version: "0.1.0" }"#,
314 fn no_moniker_for_local() {
317 //- /lib.rs crate:main deps:foo
318 use foo::module::func;
322 //- /foo/lib.rs crate:foo@CratesIo:0.1.0,https://a.b/foo.git