1 //! `render` module provides utilities for rendering completion suggestions
2 //! into code pieces that will be presented to user.
5 pub(crate) mod function;
7 pub(crate) mod pattern;
8 pub(crate) mod type_alias;
9 pub(crate) mod variant;
10 pub(crate) mod union_literal;
11 pub(crate) mod literal;
13 use hir::{AsAssocItem, HasAttrs, HirDisplay, ScopeDef};
15 helpers::item_name, imports::import_assets::LocatedImport, RootDatabase, SnippetCap, SymbolKind,
17 use syntax::{AstNode, SmolStr, SyntaxKind, TextRange};
20 context::{DotAccess, PathCompletionCtx, PathKind, PatternContext},
21 item::{Builder, CompletionRelevanceTypeMatch},
24 literal::render_variant_lit,
25 macro_::{render_macro, render_macro_pat},
27 CompletionContext, CompletionItem, CompletionItemKind, CompletionRelevance,
29 /// Interface for data and methods required for items rendering.
30 #[derive(Debug, Clone)]
31 pub(crate) struct RenderContext<'a> {
32 completion: &'a CompletionContext<'a>,
33 is_private_editable: bool,
34 import_to_add: Option<LocatedImport>,
37 impl<'a> RenderContext<'a> {
38 pub(crate) fn new(completion: &'a CompletionContext<'a>) -> RenderContext<'a> {
39 RenderContext { completion, is_private_editable: false, import_to_add: None }
42 pub(crate) fn private_editable(mut self, private_editable: bool) -> Self {
43 self.is_private_editable = private_editable;
47 pub(crate) fn import_to_add(mut self, import_to_add: Option<LocatedImport>) -> Self {
48 self.import_to_add = import_to_add;
52 fn snippet_cap(&self) -> Option<SnippetCap> {
53 self.completion.config.snippet_cap
56 fn db(&self) -> &'a RootDatabase {
60 fn source_range(&self) -> TextRange {
61 self.completion.source_range()
64 fn completion_relevance(&self) -> CompletionRelevance {
66 is_private_editable: self.is_private_editable,
67 requires_import: self.import_to_add.is_some(),
72 fn is_immediately_after_macro_bang(&self) -> bool {
73 self.completion.token.kind() == SyntaxKind::BANG
78 .map_or(false, |it| it.kind() == SyntaxKind::MACRO_CALL)
81 fn is_deprecated(&self, def: impl HasAttrs) -> bool {
82 let attrs = def.attrs(self.db());
83 attrs.by_key("deprecated").exists()
86 fn is_deprecated_assoc_item(&self, as_assoc_item: impl AsAssocItem) -> bool {
88 let assoc = match as_assoc_item.as_assoc_item(db) {
93 let is_assoc_deprecated = match assoc {
94 hir::AssocItem::Function(it) => self.is_deprecated(it),
95 hir::AssocItem::Const(it) => self.is_deprecated(it),
96 hir::AssocItem::TypeAlias(it) => self.is_deprecated(it),
100 .containing_trait_or_trait_impl(db)
101 .map(|trait_| self.is_deprecated(trait_))
105 // FIXME: remove this
106 fn docs(&self, def: impl HasAttrs) -> Option<hir::Documentation> {
111 pub(crate) fn render_field(
112 ctx: RenderContext<'_>,
113 dot_access: &DotAccess,
114 receiver: Option<hir::Name>,
117 ) -> CompletionItem {
118 let is_deprecated = ctx.is_deprecated(field);
119 let name = field.name(ctx.db());
120 let (name, escaped_name) = (name.to_smol_str(), name.escaped().to_smol_str());
121 let mut item = CompletionItem::new(
124 receiver.map_or_else(|| name.clone(), |receiver| format!("{}.{}", receiver, name).into()),
126 item.set_relevance(CompletionRelevance {
127 type_match: compute_type_match(ctx.completion, ty),
128 exact_name_match: compute_exact_name_match(ctx.completion, name.as_str()),
129 ..CompletionRelevance::default()
131 item.detail(ty.display(ctx.db()).to_string())
132 .set_documentation(field.docs(ctx.db()))
133 .set_deprecated(is_deprecated)
134 .lookup_by(name.clone());
135 item.insert_text(escaped_name);
136 if let Some(receiver) = &dot_access.receiver {
137 if let Some(original) = ctx.completion.sema.original_ast_node(receiver.clone()) {
138 if let Some(ref_match) = compute_ref_match(ctx.completion, ty) {
139 item.ref_match(ref_match, original.syntax().text_range().start());
146 pub(crate) fn render_tuple_field(
147 ctx: RenderContext<'_>,
148 receiver: Option<hir::Name>,
151 ) -> CompletionItem {
152 let mut item = CompletionItem::new(
155 receiver.map_or_else(|| field.to_string(), |receiver| format!("{}.{}", receiver, field)),
157 item.detail(ty.display(ctx.db()).to_string()).lookup_by(field.to_string());
161 pub(crate) fn render_type_inference(
163 ctx: &CompletionContext<'_>,
164 ) -> CompletionItem {
166 CompletionItem::new(CompletionItemKind::InferredType, ctx.source_range(), ty_string);
167 builder.set_relevance(CompletionRelevance { is_definite: true, ..Default::default() });
171 pub(crate) fn render_path_resolution(
172 ctx: RenderContext<'_>,
173 path_ctx: &PathCompletionCtx,
174 local_name: hir::Name,
175 resolution: ScopeDef,
177 render_resolution_path(ctx, path_ctx, local_name, None, resolution)
180 pub(crate) fn render_pattern_resolution(
181 ctx: RenderContext<'_>,
182 pattern_ctx: &PatternContext,
183 local_name: hir::Name,
184 resolution: ScopeDef,
186 render_resolution_pat(ctx, pattern_ctx, local_name, None, resolution)
189 pub(crate) fn render_resolution_with_import(
190 ctx: RenderContext<'_>,
191 path_ctx: &PathCompletionCtx,
192 import_edit: LocatedImport,
193 ) -> Option<Builder> {
194 let resolution = ScopeDef::from(import_edit.original_item);
195 let local_name = scope_def_to_name(resolution, &ctx, &import_edit)?;
197 Some(render_resolution_path(ctx, path_ctx, local_name, Some(import_edit), resolution))
200 pub(crate) fn render_resolution_with_import_pat(
201 ctx: RenderContext<'_>,
202 pattern_ctx: &PatternContext,
203 import_edit: LocatedImport,
204 ) -> Option<Builder> {
205 let resolution = ScopeDef::from(import_edit.original_item);
206 let local_name = scope_def_to_name(resolution, &ctx, &import_edit)?;
207 Some(render_resolution_pat(ctx, pattern_ctx, local_name, Some(import_edit), resolution))
210 fn scope_def_to_name(
211 resolution: ScopeDef,
212 ctx: &RenderContext<'_>,
213 import_edit: &LocatedImport,
214 ) -> Option<hir::Name> {
215 Some(match resolution {
216 ScopeDef::ModuleDef(hir::ModuleDef::Function(f)) => f.name(ctx.completion.db),
217 ScopeDef::ModuleDef(hir::ModuleDef::Const(c)) => c.name(ctx.completion.db)?,
218 ScopeDef::ModuleDef(hir::ModuleDef::TypeAlias(t)) => t.name(ctx.completion.db),
219 _ => item_name(ctx.db(), import_edit.original_item)?,
223 fn render_resolution_pat(
224 ctx: RenderContext<'_>,
225 pattern_ctx: &PatternContext,
226 local_name: hir::Name,
227 import_to_add: Option<LocatedImport>,
228 resolution: ScopeDef,
230 let _p = profile::span("render_resolution");
231 use hir::ModuleDef::*;
234 ScopeDef::ModuleDef(Macro(mac)) => {
235 let ctx = ctx.import_to_add(import_to_add);
236 return render_macro_pat(ctx, pattern_ctx, local_name, mac);
241 render_resolution_simple_(ctx, &local_name, import_to_add, resolution)
244 fn render_resolution_path(
245 ctx: RenderContext<'_>,
246 path_ctx: &PathCompletionCtx,
247 local_name: hir::Name,
248 import_to_add: Option<LocatedImport>,
249 resolution: ScopeDef,
251 let _p = profile::span("render_resolution");
252 use hir::ModuleDef::*;
255 ScopeDef::ModuleDef(Macro(mac)) => {
256 let ctx = ctx.import_to_add(import_to_add);
257 return render_macro(ctx, path_ctx, local_name, mac);
259 ScopeDef::ModuleDef(Function(func)) => {
260 let ctx = ctx.import_to_add(import_to_add);
261 return render_fn(ctx, path_ctx, Some(local_name), func);
263 ScopeDef::ModuleDef(Variant(var)) => {
264 let ctx = ctx.clone().import_to_add(import_to_add.clone());
266 render_variant_lit(ctx, path_ctx, Some(local_name.clone()), var, None)
274 let completion = ctx.completion;
275 let cap = ctx.snippet_cap();
276 let db = completion.db;
277 let config = completion.config;
279 let name = local_name.to_smol_str();
280 let mut item = render_resolution_simple_(ctx, &local_name, import_to_add, resolution);
281 if local_name.escaped().is_escaped() {
282 item.insert_text(local_name.escaped().to_smol_str());
284 // Add `<>` for generic types
285 let type_path_no_ty_args = matches!(
287 PathCompletionCtx { kind: PathKind::Type { .. }, has_type_args: false, .. }
288 ) && config.callable.is_some();
289 if type_path_no_ty_args {
290 if let Some(cap) = cap {
291 let has_non_default_type_params = match resolution {
292 ScopeDef::ModuleDef(hir::ModuleDef::Adt(it)) => it.has_non_default_type_params(db),
293 ScopeDef::ModuleDef(hir::ModuleDef::TypeAlias(it)) => {
294 it.has_non_default_type_params(db)
299 if has_non_default_type_params {
300 cov_mark::hit!(inserts_angle_brackets_for_generics);
301 item.lookup_by(name.clone())
302 .label(SmolStr::from_iter([&name, "<…>"]))
304 .insert_snippet(cap, format!("{}<$0>", local_name.escaped()));
308 if let ScopeDef::Local(local) = resolution {
309 let ty = local.ty(db);
310 if !ty.is_unknown() {
311 item.detail(ty.display(db).to_string());
314 item.set_relevance(CompletionRelevance {
315 type_match: compute_type_match(completion, &ty),
316 exact_name_match: compute_exact_name_match(completion, &name),
318 ..CompletionRelevance::default()
321 if let Some(ref_match) = compute_ref_match(completion, &ty) {
322 item.ref_match(ref_match, path_ctx.path.syntax().text_range().start());
328 fn render_resolution_simple_(
329 ctx: RenderContext<'_>,
330 local_name: &hir::Name,
331 import_to_add: Option<LocatedImport>,
332 resolution: ScopeDef,
334 let _p = profile::span("render_resolution");
337 let ctx = ctx.import_to_add(import_to_add);
338 let kind = res_to_kind(resolution);
340 let mut item = CompletionItem::new(kind, ctx.source_range(), local_name.to_smol_str());
341 item.set_relevance(ctx.completion_relevance())
342 .set_documentation(scope_def_docs(db, resolution))
343 .set_deprecated(scope_def_is_deprecated(&ctx, resolution));
345 if let Some(import_to_add) = ctx.import_to_add {
346 item.add_import(import_to_add);
351 fn res_to_kind(resolution: ScopeDef) -> CompletionItemKind {
352 use hir::ModuleDef::*;
354 ScopeDef::Unknown => CompletionItemKind::UnresolvedReference,
355 ScopeDef::ModuleDef(Function(_)) => CompletionItemKind::SymbolKind(SymbolKind::Function),
356 ScopeDef::ModuleDef(Variant(_)) => CompletionItemKind::SymbolKind(SymbolKind::Variant),
357 ScopeDef::ModuleDef(Macro(_)) => CompletionItemKind::SymbolKind(SymbolKind::Macro),
358 ScopeDef::ModuleDef(Module(..)) => CompletionItemKind::SymbolKind(SymbolKind::Module),
359 ScopeDef::ModuleDef(Adt(adt)) => CompletionItemKind::SymbolKind(match adt {
360 hir::Adt::Struct(_) => SymbolKind::Struct,
361 hir::Adt::Union(_) => SymbolKind::Union,
362 hir::Adt::Enum(_) => SymbolKind::Enum,
364 ScopeDef::ModuleDef(Const(..)) => CompletionItemKind::SymbolKind(SymbolKind::Const),
365 ScopeDef::ModuleDef(Static(..)) => CompletionItemKind::SymbolKind(SymbolKind::Static),
366 ScopeDef::ModuleDef(Trait(..)) => CompletionItemKind::SymbolKind(SymbolKind::Trait),
367 ScopeDef::ModuleDef(TypeAlias(..)) => CompletionItemKind::SymbolKind(SymbolKind::TypeAlias),
368 ScopeDef::ModuleDef(BuiltinType(..)) => CompletionItemKind::BuiltinType,
369 ScopeDef::GenericParam(param) => CompletionItemKind::SymbolKind(match param {
370 hir::GenericParam::TypeParam(_) => SymbolKind::TypeParam,
371 hir::GenericParam::ConstParam(_) => SymbolKind::ConstParam,
372 hir::GenericParam::LifetimeParam(_) => SymbolKind::LifetimeParam,
374 ScopeDef::Local(..) => CompletionItemKind::SymbolKind(SymbolKind::Local),
375 ScopeDef::Label(..) => CompletionItemKind::SymbolKind(SymbolKind::Label),
376 ScopeDef::AdtSelfType(..) | ScopeDef::ImplSelfType(..) => {
377 CompletionItemKind::SymbolKind(SymbolKind::SelfParam)
382 fn scope_def_docs(db: &RootDatabase, resolution: ScopeDef) -> Option<hir::Documentation> {
383 use hir::ModuleDef::*;
385 ScopeDef::ModuleDef(Module(it)) => it.docs(db),
386 ScopeDef::ModuleDef(Adt(it)) => it.docs(db),
387 ScopeDef::ModuleDef(Variant(it)) => it.docs(db),
388 ScopeDef::ModuleDef(Const(it)) => it.docs(db),
389 ScopeDef::ModuleDef(Static(it)) => it.docs(db),
390 ScopeDef::ModuleDef(Trait(it)) => it.docs(db),
391 ScopeDef::ModuleDef(TypeAlias(it)) => it.docs(db),
396 fn scope_def_is_deprecated(ctx: &RenderContext<'_>, resolution: ScopeDef) -> bool {
398 ScopeDef::ModuleDef(it) => ctx.is_deprecated_assoc_item(it),
399 ScopeDef::GenericParam(it) => ctx.is_deprecated(it),
400 ScopeDef::AdtSelfType(it) => ctx.is_deprecated(it),
405 fn compute_type_match(
406 ctx: &CompletionContext<'_>,
407 completion_ty: &hir::Type,
408 ) -> Option<CompletionRelevanceTypeMatch> {
409 let expected_type = ctx.expected_type.as_ref()?;
411 // We don't ever consider unit type to be an exact type match, since
412 // nearly always this is not meaningful to the user.
413 if expected_type.is_unit() {
417 if completion_ty == expected_type {
418 Some(CompletionRelevanceTypeMatch::Exact)
419 } else if expected_type.could_unify_with(ctx.db, completion_ty) {
420 Some(CompletionRelevanceTypeMatch::CouldUnify)
426 fn compute_exact_name_match(ctx: &CompletionContext<'_>, completion_name: &str) -> bool {
427 ctx.expected_name.as_ref().map_or(false, |name| name.text() == completion_name)
430 fn compute_ref_match(
431 ctx: &CompletionContext<'_>,
432 completion_ty: &hir::Type,
433 ) -> Option<hir::Mutability> {
434 let expected_type = ctx.expected_type.as_ref()?;
435 if completion_ty != expected_type {
436 let expected_type_without_ref = expected_type.remove_ref()?;
437 if completion_ty.autoderef(ctx.db).any(|deref_ty| deref_ty == expected_type_without_ref) {
438 cov_mark::hit!(suggest_ref);
439 let mutability = if expected_type.is_mutable_reference() {
442 hir::Mutability::Shared
444 return Some(mutability);
454 use expect_test::{expect, Expect};
455 use ide_db::SymbolKind;
456 use itertools::Itertools;
459 item::CompletionRelevanceTypeMatch,
460 tests::{check_edit, do_completion, get_all_items, TEST_CONFIG},
461 CompletionItem, CompletionItemKind, CompletionRelevance, CompletionRelevancePostfixMatch,
465 fn check(ra_fixture: &str, kind: impl Into<CompletionItemKind>, expect: Expect) {
466 let actual = do_completion(ra_fixture, kind.into());
467 expect.assert_debug_eq(&actual);
471 fn check_kinds(ra_fixture: &str, kinds: &[CompletionItemKind], expect: Expect) {
473 kinds.iter().flat_map(|&kind| do_completion(ra_fixture, kind)).collect();
474 expect.assert_debug_eq(&actual);
478 fn check_relevance_for_kinds(ra_fixture: &str, kinds: &[CompletionItemKind], expect: Expect) {
479 let mut actual = get_all_items(TEST_CONFIG, ra_fixture, None);
480 actual.retain(|it| kinds.contains(&it.kind()));
481 actual.sort_by_key(|it| cmp::Reverse(it.relevance().score()));
482 check_relevance_(actual, expect);
486 fn check_relevance(ra_fixture: &str, expect: Expect) {
487 let mut actual = get_all_items(TEST_CONFIG, ra_fixture, None);
488 actual.retain(|it| it.kind() != CompletionItemKind::Snippet);
489 actual.retain(|it| it.kind() != CompletionItemKind::Keyword);
490 actual.retain(|it| it.kind() != CompletionItemKind::BuiltinType);
491 actual.sort_by_key(|it| cmp::Reverse(it.relevance().score()));
492 check_relevance_(actual, expect);
496 fn check_relevance_(actual: Vec<CompletionItem>, expect: Expect) {
500 let mut items = vec![];
502 let tag = it.kind().tag();
503 let relevance = display_relevance(it.relevance());
504 items.push(format!("{} {} {}\n", tag, it.label(), relevance));
506 if let Some((mutability, _offset, relevance)) = it.ref_match() {
507 let label = format!("&{}{}", mutability.as_keyword_for_ref(), it.label());
508 let relevance = display_relevance(relevance);
510 items.push(format!("{} {} {}\n", tag, label, relevance));
515 .collect::<String>();
517 expect.assert_eq(&actual);
519 fn display_relevance(relevance: CompletionRelevance) -> String {
520 let relevance_factors = vec![
521 (relevance.type_match == Some(CompletionRelevanceTypeMatch::Exact), "type"),
523 relevance.type_match == Some(CompletionRelevanceTypeMatch::CouldUnify),
526 (relevance.exact_name_match, "name"),
527 (relevance.is_local, "local"),
529 relevance.postfix_match == Some(CompletionRelevancePostfixMatch::Exact),
532 (relevance.is_op_method, "op_method"),
533 (relevance.requires_import, "requires_import"),
536 .filter_map(|(cond, desc)| if cond { Some(desc) } else { None })
539 format!("[{}]", relevance_factors)
544 fn enum_detail_includes_record_fields() {
547 enum Foo { Foo { x: i32, y: i32 } }
549 fn main() { Foo::Fo$0 }
556 source_range: 54..56,
558 insert: "Foo { x: ${1:()}, y: ${2:()} }$0",
562 detail: "Foo { x: i32, y: i32 }",
570 fn enum_detail_includes_tuple_fields() {
573 enum Foo { Foo (i32, i32) }
575 fn main() { Foo::Fo$0 }
582 source_range: 46..48,
584 insert: "Foo(${1:()}, ${2:()})$0",
588 detail: "Foo(i32, i32)",
596 fn fn_detail_includes_args_and_return_type() {
599 fn foo<T>(a: u32, b: u32, t: T) -> (u32, T) { (a, t) }
603 SymbolKind::Function,
608 source_range: 68..70,
610 insert: "foo(${1:a}, ${2:b}, ${3:t})$0",
615 detail: "fn(u32, u32, T) -> (u32, T)",
616 trigger_call_info: true,
620 source_range: 68..70,
635 fn enum_detail_just_name_for_unit() {
640 fn main() { Foo::Fo$0 }
647 source_range: 35..37,
661 fn lookup_enums_by_two_qualifiers() {
665 pub enum Spam { Foo, Bar(i32) }
667 fn main() { let _: m::Spam = S$0 }
670 CompletionItemKind::SymbolKind(SymbolKind::Function),
671 CompletionItemKind::SymbolKind(SymbolKind::Module),
672 CompletionItemKind::SymbolKind(SymbolKind::Variant),
678 source_range: 75..76,
689 source_range: 75..76,
697 label: "m::Spam::Bar(…)",
698 source_range: 75..76,
700 insert: "m::Spam::Bar(${1:()})$0",
704 lookup: "Spam::Bar(…)",
705 detail: "m::Spam::Bar(i32)",
706 relevance: CompletionRelevance {
707 exact_name_match: false,
712 is_item_from_trait: false,
713 is_name_already_imported: false,
714 requires_import: false,
716 is_private_editable: false,
722 label: "m::Spam::Foo",
723 source_range: 75..76,
725 insert: "m::Spam::Foo$0",
730 detail: "m::Spam::Foo",
731 relevance: CompletionRelevance {
732 exact_name_match: false,
737 is_item_from_trait: false,
738 is_name_already_imported: false,
739 requires_import: false,
741 is_private_editable: false,
752 fn sets_deprecated_flag_in_items() {
756 fn something_deprecated() {}
760 SymbolKind::Function,
765 source_range: 56..59,
775 label: "something_deprecated()",
776 source_range: 56..59,
778 insert: "something_deprecated()$0",
782 lookup: "something_deprecated",
792 struct A { #[deprecated] the_field: u32 }
793 fn foo() { A { the$0 } }
800 source_range: 57..60,
808 relevance: CompletionRelevance {
809 exact_name_match: false,
814 is_item_from_trait: false,
815 is_name_already_imported: false,
816 requires_import: false,
818 is_private_editable: false,
838 fn bar(self) { self.$0 }
840 &[CompletionItemKind::Method, CompletionItemKind::SymbolKind(SymbolKind::Field)],
845 source_range: 94..94,
851 documentation: Documentation(
857 source_range: 94..94,
864 documentation: Documentation(
887 CompletionItemKind::SymbolKind(SymbolKind::Module),
888 CompletionItemKind::SymbolKind(SymbolKind::Variant),
889 CompletionItemKind::SymbolKind(SymbolKind::Enum),
895 source_range: 10..12,
901 documentation: Documentation(
907 source_range: 10..12,
914 documentation: Documentation(
920 source_range: 10..12,
926 documentation: Documentation(
936 fn dont_render_attrs() {
942 fn the_method(&self) { }
944 fn foo(s: S) { s.$0 }
946 CompletionItemKind::Method,
950 label: "the_method()",
951 source_range: 81..81,
953 insert: "the_method()$0",
955 lookup: "the_method",
964 fn no_call_parens_if_fn_ptr_needed() {
965 cov_mark::check!(no_call_parens_if_fn_ptr_needed);
969 fn foo(foo: u8, bar: u8) {}
970 struct ManualVtable { f: fn(u8, u8) }
972 fn main() -> ManualVtable {
973 ManualVtable { f: f$0 }
977 fn foo(foo: u8, bar: u8) {}
978 struct ManualVtable { f: fn(u8, u8) }
980 fn main() -> ManualVtable {
981 ManualVtable { f: foo }
988 struct RawIdentTable { r#type: u32 }
990 fn main() -> RawIdentTable {
991 RawIdentTable { t$0: 42 }
995 struct RawIdentTable { r#type: u32 }
997 fn main() -> RawIdentTable {
998 RawIdentTable { r#type: 42 }
1005 fn no_parens_in_use_item() {
1009 mod m { pub fn foo() {} }
1013 mod m { pub fn foo() {} }
1020 fn no_parens_in_call() {
1025 fn main() { f$0(); }
1029 fn main() { foo(); }
1036 impl Foo { fn foo(&self){} }
1037 fn f(foo: &Foo) { foo.f$0(); }
1041 impl Foo { fn foo(&self){} }
1042 fn f(foo: &Foo) { foo.foo(); }
1048 fn inserts_angle_brackets_for_generics() {
1049 cov_mark::check!(inserts_angle_brackets_for_generics);
1075 struct Vec<T = i128> {}
1079 struct Vec<T = i128> {}
1087 fn foo(xs: Ve$0<i128>)
1091 fn foo(xs: Vec<i128>)
1097 fn active_param_relevance() {
1100 struct S { foo: i64, bar: u32, baz: u32 }
1101 fn test(bar: u32) { }
1102 fn foo(s: S) { test(s.$0) }
1113 fn record_field_relevances() {
1116 struct A { foo: i64, bar: u32, baz: u32 }
1117 struct B { x: (), y: f32, bar: u32 }
1118 fn foo(a: A) { B { bar: a.$0 }; }
1129 fn record_field_and_call_relevances() {
1132 struct A { foo: i64, bar: u32, baz: u32 }
1133 struct B { x: (), y: f32, bar: u32 }
1135 fn foo(a: A) { B { bar: f(a.$0) }; }
1145 struct A { foo: i64, bar: u32, baz: u32 }
1146 struct B { x: (), y: f32, bar: u32 }
1148 fn foo(a: A) { f(B { bar: a.$0 }); }
1159 fn prioritize_exact_ref_match() {
1162 struct WorldSnapshot { _f: () };
1163 fn go(world: &WorldSnapshot) { go(w$0) }
1166 lc world [type+name+local]
1167 st WorldSnapshot {…} []
1168 st &WorldSnapshot {…} [type]
1176 fn too_many_arguments() {
1177 cov_mark::check!(too_many_arguments);
1181 fn f(foo: &Foo) { f(foo, w$0) }
1192 fn score_fn_type_and_name_match() {
1195 struct A { bar: u8 }
1196 fn baz() -> u8 { 0 }
1197 fn bar() -> u8 { 0 }
1198 fn f() { A { bar: b$0 }; }
1201 fn bar() [type+name]
1210 fn score_method_type_and_name_match() {
1216 fn aaa(&self) -> u32 { 0 }
1217 fn bbb(&self) -> u32 { 0 }
1218 fn ccc(&self) -> u64 { 0 }
1225 me aaa() [type+name]
1233 fn score_method_name_match_only() {
1239 fn aaa(&self) -> u64 { 0 }
1252 fn suggest_ref_mut() {
1253 cov_mark::check!(suggest_ref);
1257 fn foo(s: &mut S) {}
1265 lc &mut s [type+name+local]
1276 fn foo(s: &mut S) {}
1283 lc s [type+name+local]
1293 fn foo(s: &mut S) {}
1300 lc ssss [type+local]
1310 fn suggest_deref() {
1317 impl core::ops::Deref for T {
1320 fn deref(&self) -> &Self::Target {
1351 fn suggest_deref_mut() {
1354 //- minicore: deref_mut
1358 impl core::ops::Deref for T {
1361 fn deref(&self) -> &Self::Target {
1366 impl core::ops::DerefMut for T {
1367 fn deref_mut(&mut self) -> &mut Self::Target {
1372 fn foo(s: &mut S) {}
1384 lc &mut t [type+local]
1458 fn suggest_deref_fn_ret() {
1465 impl core::ops::Deref for T {
1468 fn deref(&self) -> &Self::Target {
1496 fn op_function_relevances() {
1501 fn sub(self, other: Self) -> Self { self }
1504 fn foo(a: u32) { a.$0 }
1507 me sub(…) (as Sub) [op_method]
1517 pub trait PartialEq<Rhs: ?Sized = Self> {
1518 fn eq(&self, other: &Rhs) -> bool;
1519 fn ne(&self, other: &Rhs) -> bool;
1522 impl PartialEq for Foo {}
1529 me eq(…) (as PartialEq) [op_method]
1530 me ne(…) (as PartialEq) [op_method]
1536 fn struct_field_method_ref() {
1539 struct Foo { bar: u32 }
1540 impl Foo { fn baz(&self) -> u32 { 0 } }
1542 fn foo(f: Foo) { let _: &u32 = f.b$0 }
1544 &[CompletionItemKind::Method, CompletionItemKind::SymbolKind(SymbolKind::Field)],
1549 source_range: 98..99,
1554 detail: "fn(&self) -> u32",
1559 source_range: 98..99,
1574 fn qualified_path_ref() {
1590 &[CompletionItemKind::SymbolKind(SymbolKind::Function)],
1595 source_range: 95..95,
1602 detail: "fn() -> S",
1614 enum Foo<T> { A(T), B }
1615 // bar() should not be an exact type match
1616 // because the generic parameters are different
1617 fn bar() -> Foo<u8> { Foo::B }
1618 // FIXME baz() should be an exact type match
1619 // because the types could unify, but it currently
1620 // is not. This is due to the T here being
1621 // TyKind::Placeholder rather than TyKind::Missing.
1622 fn baz<T>() -> Foo<T> { Foo::B }
1624 let foo: Foo<u32> = Foo::B;
1625 let _: Foo<u32> = f$0;
1630 ev Foo::A(…) [type_could_unify]
1631 ev Foo::B [type_could_unify]
1641 fn postfix_exact_match_is_high_priority() {
1642 cov_mark::check!(postfix_exact_match_is_high_priority);
1643 check_relevance_for_kinds(
1648 fn not(self) -> Self::Output;
1653 fn not(self) -> bool { if self { false } else { true }}
1658 let _: bool = (9 > 2).not$0;
1661 &[CompletionItemKind::Snippet, CompletionItemKind::Method],
1664 me not() (use ops::Not) [type_could_unify+requires_import]
1679 fn postfix_inexact_match_is_low_priority() {
1680 cov_mark::check!(postfix_inexact_match_is_low_priority);
1681 check_relevance_for_kinds(
1691 &[CompletionItemKind::Snippet, CompletionItemKind::Method],
1708 fn flyimport_reduced_relevance() {
1713 pub trait BufRead {}
1714 pub struct BufReader;
1715 pub struct BufWriter;
1728 tt BufRead (use std::io::BufRead) [requires_import]
1729 st BufReader (use std::io::BufReader) [requires_import]
1730 st BufWriter (use std::io::BufWriter) [requires_import]
1736 fn completes_struct_with_raw_identifier() {
1740 mod m { pub struct r#type {} }
1742 let r#type = m::t$0;
1746 mod m { pub struct r#type {} }
1748 let r#type = m::r#type;
1755 fn completes_fn_with_raw_identifier() {
1759 mod m { pub fn r#type {} }
1765 mod m { pub fn r#type {} }
1774 fn completes_macro_with_raw_identifier() {
1778 macro_rules! r#let { () => {} }
1784 macro_rules! r#let { () => {} }
1793 fn completes_variant_with_raw_identifier() {
1812 fn completes_field_with_raw_identifier() {
1817 pub struct r#struct {
1823 let a = r#type::r#struct {};
1829 pub struct r#struct {
1835 let a = r#type::r#struct {};
1843 fn completes_const_with_raw_identifier() {
1848 impl r#struct { pub const r#type: u8 = 1; }
1855 impl r#struct { pub const r#type: u8 = 1; }
1864 fn completes_type_alias_with_raw_identifier() {
1869 trait r#trait { type r#type; }
1870 impl r#trait for r#struct { type t$0 }
1874 trait r#trait { type r#type; }
1875 impl r#trait for r#struct { type r#type = $0; }