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 field_with_receiver(receiver.as_ref(), &name),
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(field_with_receiver(receiver.as_ref(), &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 fn field_with_receiver(receiver: Option<&hir::Name>, field_name: &str) -> SmolStr {
148 .map_or_else(|| field_name.into(), |receiver| format!("{}.{}", receiver, field_name).into())
151 pub(crate) fn render_tuple_field(
152 ctx: RenderContext<'_>,
153 receiver: Option<hir::Name>,
156 ) -> CompletionItem {
157 let mut item = CompletionItem::new(
160 field_with_receiver(receiver.as_ref(), &field.to_string()),
162 item.detail(ty.display(ctx.db()).to_string()).lookup_by(field.to_string());
166 pub(crate) fn render_type_inference(
168 ctx: &CompletionContext<'_>,
169 ) -> CompletionItem {
171 CompletionItem::new(CompletionItemKind::InferredType, ctx.source_range(), ty_string);
172 builder.set_relevance(CompletionRelevance { is_definite: true, ..Default::default() });
176 pub(crate) fn render_path_resolution(
177 ctx: RenderContext<'_>,
178 path_ctx: &PathCompletionCtx,
179 local_name: hir::Name,
180 resolution: ScopeDef,
182 render_resolution_path(ctx, path_ctx, local_name, None, resolution)
185 pub(crate) fn render_pattern_resolution(
186 ctx: RenderContext<'_>,
187 pattern_ctx: &PatternContext,
188 local_name: hir::Name,
189 resolution: ScopeDef,
191 render_resolution_pat(ctx, pattern_ctx, local_name, None, resolution)
194 pub(crate) fn render_resolution_with_import(
195 ctx: RenderContext<'_>,
196 path_ctx: &PathCompletionCtx,
197 import_edit: LocatedImport,
198 ) -> Option<Builder> {
199 let resolution = ScopeDef::from(import_edit.original_item);
200 let local_name = scope_def_to_name(resolution, &ctx, &import_edit)?;
202 Some(render_resolution_path(ctx, path_ctx, local_name, Some(import_edit), resolution))
205 pub(crate) fn render_resolution_with_import_pat(
206 ctx: RenderContext<'_>,
207 pattern_ctx: &PatternContext,
208 import_edit: LocatedImport,
209 ) -> Option<Builder> {
210 let resolution = ScopeDef::from(import_edit.original_item);
211 let local_name = scope_def_to_name(resolution, &ctx, &import_edit)?;
212 Some(render_resolution_pat(ctx, pattern_ctx, local_name, Some(import_edit), resolution))
215 fn scope_def_to_name(
216 resolution: ScopeDef,
217 ctx: &RenderContext<'_>,
218 import_edit: &LocatedImport,
219 ) -> Option<hir::Name> {
220 Some(match resolution {
221 ScopeDef::ModuleDef(hir::ModuleDef::Function(f)) => f.name(ctx.completion.db),
222 ScopeDef::ModuleDef(hir::ModuleDef::Const(c)) => c.name(ctx.completion.db)?,
223 ScopeDef::ModuleDef(hir::ModuleDef::TypeAlias(t)) => t.name(ctx.completion.db),
224 _ => item_name(ctx.db(), import_edit.original_item)?,
228 fn render_resolution_pat(
229 ctx: RenderContext<'_>,
230 pattern_ctx: &PatternContext,
231 local_name: hir::Name,
232 import_to_add: Option<LocatedImport>,
233 resolution: ScopeDef,
235 let _p = profile::span("render_resolution");
236 use hir::ModuleDef::*;
239 ScopeDef::ModuleDef(Macro(mac)) => {
240 let ctx = ctx.import_to_add(import_to_add);
241 return render_macro_pat(ctx, pattern_ctx, local_name, mac);
246 render_resolution_simple_(ctx, &local_name, import_to_add, resolution)
249 fn render_resolution_path(
250 ctx: RenderContext<'_>,
251 path_ctx: &PathCompletionCtx,
252 local_name: hir::Name,
253 import_to_add: Option<LocatedImport>,
254 resolution: ScopeDef,
256 let _p = profile::span("render_resolution");
257 use hir::ModuleDef::*;
260 ScopeDef::ModuleDef(Macro(mac)) => {
261 let ctx = ctx.import_to_add(import_to_add);
262 return render_macro(ctx, path_ctx, local_name, mac);
264 ScopeDef::ModuleDef(Function(func)) => {
265 let ctx = ctx.import_to_add(import_to_add);
266 return render_fn(ctx, path_ctx, Some(local_name), func);
268 ScopeDef::ModuleDef(Variant(var)) => {
269 let ctx = ctx.clone().import_to_add(import_to_add.clone());
271 render_variant_lit(ctx, path_ctx, Some(local_name.clone()), var, None)
279 let completion = ctx.completion;
280 let cap = ctx.snippet_cap();
281 let db = completion.db;
282 let config = completion.config;
284 let name = local_name.to_smol_str();
285 let mut item = render_resolution_simple_(ctx, &local_name, import_to_add, resolution);
286 if local_name.escaped().is_escaped() {
287 item.insert_text(local_name.escaped().to_smol_str());
289 // Add `<>` for generic types
290 let type_path_no_ty_args = matches!(
292 PathCompletionCtx { kind: PathKind::Type { .. }, has_type_args: false, .. }
293 ) && config.callable.is_some();
294 if type_path_no_ty_args {
295 if let Some(cap) = cap {
296 let has_non_default_type_params = match resolution {
297 ScopeDef::ModuleDef(hir::ModuleDef::Adt(it)) => it.has_non_default_type_params(db),
298 ScopeDef::ModuleDef(hir::ModuleDef::TypeAlias(it)) => {
299 it.has_non_default_type_params(db)
304 if has_non_default_type_params {
305 cov_mark::hit!(inserts_angle_brackets_for_generics);
306 item.lookup_by(name.clone())
307 .label(SmolStr::from_iter([&name, "<…>"]))
309 .insert_snippet(cap, format!("{}<$0>", local_name.escaped()));
313 if let ScopeDef::Local(local) = resolution {
314 let ty = local.ty(db);
315 if !ty.is_unknown() {
316 item.detail(ty.display(db).to_string());
319 item.set_relevance(CompletionRelevance {
320 type_match: compute_type_match(completion, &ty),
321 exact_name_match: compute_exact_name_match(completion, &name),
323 ..CompletionRelevance::default()
326 if let Some(ref_match) = compute_ref_match(completion, &ty) {
327 item.ref_match(ref_match, path_ctx.path.syntax().text_range().start());
333 fn render_resolution_simple_(
334 ctx: RenderContext<'_>,
335 local_name: &hir::Name,
336 import_to_add: Option<LocatedImport>,
337 resolution: ScopeDef,
339 let _p = profile::span("render_resolution");
342 let ctx = ctx.import_to_add(import_to_add);
343 let kind = res_to_kind(resolution);
345 let mut item = CompletionItem::new(kind, ctx.source_range(), local_name.to_smol_str());
346 item.set_relevance(ctx.completion_relevance())
347 .set_documentation(scope_def_docs(db, resolution))
348 .set_deprecated(scope_def_is_deprecated(&ctx, resolution));
350 if let Some(import_to_add) = ctx.import_to_add {
351 item.add_import(import_to_add);
356 fn res_to_kind(resolution: ScopeDef) -> CompletionItemKind {
357 use hir::ModuleDef::*;
359 ScopeDef::Unknown => CompletionItemKind::UnresolvedReference,
360 ScopeDef::ModuleDef(Function(_)) => CompletionItemKind::SymbolKind(SymbolKind::Function),
361 ScopeDef::ModuleDef(Variant(_)) => CompletionItemKind::SymbolKind(SymbolKind::Variant),
362 ScopeDef::ModuleDef(Macro(_)) => CompletionItemKind::SymbolKind(SymbolKind::Macro),
363 ScopeDef::ModuleDef(Module(..)) => CompletionItemKind::SymbolKind(SymbolKind::Module),
364 ScopeDef::ModuleDef(Adt(adt)) => CompletionItemKind::SymbolKind(match adt {
365 hir::Adt::Struct(_) => SymbolKind::Struct,
366 hir::Adt::Union(_) => SymbolKind::Union,
367 hir::Adt::Enum(_) => SymbolKind::Enum,
369 ScopeDef::ModuleDef(Const(..)) => CompletionItemKind::SymbolKind(SymbolKind::Const),
370 ScopeDef::ModuleDef(Static(..)) => CompletionItemKind::SymbolKind(SymbolKind::Static),
371 ScopeDef::ModuleDef(Trait(..)) => CompletionItemKind::SymbolKind(SymbolKind::Trait),
372 ScopeDef::ModuleDef(TypeAlias(..)) => CompletionItemKind::SymbolKind(SymbolKind::TypeAlias),
373 ScopeDef::ModuleDef(BuiltinType(..)) => CompletionItemKind::BuiltinType,
374 ScopeDef::GenericParam(param) => CompletionItemKind::SymbolKind(match param {
375 hir::GenericParam::TypeParam(_) => SymbolKind::TypeParam,
376 hir::GenericParam::ConstParam(_) => SymbolKind::ConstParam,
377 hir::GenericParam::LifetimeParam(_) => SymbolKind::LifetimeParam,
379 ScopeDef::Local(..) => CompletionItemKind::SymbolKind(SymbolKind::Local),
380 ScopeDef::Label(..) => CompletionItemKind::SymbolKind(SymbolKind::Label),
381 ScopeDef::AdtSelfType(..) | ScopeDef::ImplSelfType(..) => {
382 CompletionItemKind::SymbolKind(SymbolKind::SelfParam)
387 fn scope_def_docs(db: &RootDatabase, resolution: ScopeDef) -> Option<hir::Documentation> {
388 use hir::ModuleDef::*;
390 ScopeDef::ModuleDef(Module(it)) => it.docs(db),
391 ScopeDef::ModuleDef(Adt(it)) => it.docs(db),
392 ScopeDef::ModuleDef(Variant(it)) => it.docs(db),
393 ScopeDef::ModuleDef(Const(it)) => it.docs(db),
394 ScopeDef::ModuleDef(Static(it)) => it.docs(db),
395 ScopeDef::ModuleDef(Trait(it)) => it.docs(db),
396 ScopeDef::ModuleDef(TypeAlias(it)) => it.docs(db),
401 fn scope_def_is_deprecated(ctx: &RenderContext<'_>, resolution: ScopeDef) -> bool {
403 ScopeDef::ModuleDef(it) => ctx.is_deprecated_assoc_item(it),
404 ScopeDef::GenericParam(it) => ctx.is_deprecated(it),
405 ScopeDef::AdtSelfType(it) => ctx.is_deprecated(it),
410 fn compute_type_match(
411 ctx: &CompletionContext<'_>,
412 completion_ty: &hir::Type,
413 ) -> Option<CompletionRelevanceTypeMatch> {
414 let expected_type = ctx.expected_type.as_ref()?;
416 // We don't ever consider unit type to be an exact type match, since
417 // nearly always this is not meaningful to the user.
418 if expected_type.is_unit() {
422 if completion_ty == expected_type {
423 Some(CompletionRelevanceTypeMatch::Exact)
424 } else if expected_type.could_unify_with(ctx.db, completion_ty) {
425 Some(CompletionRelevanceTypeMatch::CouldUnify)
431 fn compute_exact_name_match(ctx: &CompletionContext<'_>, completion_name: &str) -> bool {
432 ctx.expected_name.as_ref().map_or(false, |name| name.text() == completion_name)
435 fn compute_ref_match(
436 ctx: &CompletionContext<'_>,
437 completion_ty: &hir::Type,
438 ) -> Option<hir::Mutability> {
439 let expected_type = ctx.expected_type.as_ref()?;
440 if completion_ty != expected_type {
441 let expected_type_without_ref = expected_type.remove_ref()?;
442 if completion_ty.autoderef(ctx.db).any(|deref_ty| deref_ty == expected_type_without_ref) {
443 cov_mark::hit!(suggest_ref);
444 let mutability = if expected_type.is_mutable_reference() {
447 hir::Mutability::Shared
449 return Some(mutability);
459 use expect_test::{expect, Expect};
460 use ide_db::SymbolKind;
461 use itertools::Itertools;
464 item::CompletionRelevanceTypeMatch,
465 tests::{check_edit, do_completion, get_all_items, TEST_CONFIG},
466 CompletionItem, CompletionItemKind, CompletionRelevance, CompletionRelevancePostfixMatch,
470 fn check(ra_fixture: &str, kind: impl Into<CompletionItemKind>, expect: Expect) {
471 let actual = do_completion(ra_fixture, kind.into());
472 expect.assert_debug_eq(&actual);
476 fn check_kinds(ra_fixture: &str, kinds: &[CompletionItemKind], expect: Expect) {
478 kinds.iter().flat_map(|&kind| do_completion(ra_fixture, kind)).collect();
479 expect.assert_debug_eq(&actual);
483 fn check_relevance_for_kinds(ra_fixture: &str, kinds: &[CompletionItemKind], expect: Expect) {
484 let mut actual = get_all_items(TEST_CONFIG, ra_fixture, None);
485 actual.retain(|it| kinds.contains(&it.kind()));
486 actual.sort_by_key(|it| cmp::Reverse(it.relevance().score()));
487 check_relevance_(actual, expect);
491 fn check_relevance(ra_fixture: &str, expect: Expect) {
492 let mut actual = get_all_items(TEST_CONFIG, ra_fixture, None);
493 actual.retain(|it| it.kind() != CompletionItemKind::Snippet);
494 actual.retain(|it| it.kind() != CompletionItemKind::Keyword);
495 actual.retain(|it| it.kind() != CompletionItemKind::BuiltinType);
496 actual.sort_by_key(|it| cmp::Reverse(it.relevance().score()));
497 check_relevance_(actual, expect);
501 fn check_relevance_(actual: Vec<CompletionItem>, expect: Expect) {
505 let mut items = vec![];
507 let tag = it.kind().tag();
508 let relevance = display_relevance(it.relevance());
509 items.push(format!("{} {} {}\n", tag, it.label(), relevance));
511 if let Some((mutability, _offset, relevance)) = it.ref_match() {
512 let label = format!("&{}{}", mutability.as_keyword_for_ref(), it.label());
513 let relevance = display_relevance(relevance);
515 items.push(format!("{} {} {}\n", tag, label, relevance));
520 .collect::<String>();
522 expect.assert_eq(&actual);
524 fn display_relevance(relevance: CompletionRelevance) -> String {
525 let relevance_factors = vec![
526 (relevance.type_match == Some(CompletionRelevanceTypeMatch::Exact), "type"),
528 relevance.type_match == Some(CompletionRelevanceTypeMatch::CouldUnify),
531 (relevance.exact_name_match, "name"),
532 (relevance.is_local, "local"),
534 relevance.postfix_match == Some(CompletionRelevancePostfixMatch::Exact),
537 (relevance.is_op_method, "op_method"),
538 (relevance.requires_import, "requires_import"),
541 .filter_map(|(cond, desc)| if cond { Some(desc) } else { None })
544 format!("[{}]", relevance_factors)
549 fn enum_detail_includes_record_fields() {
552 enum Foo { Foo { x: i32, y: i32 } }
554 fn main() { Foo::Fo$0 }
561 source_range: 54..56,
563 insert: "Foo { x: ${1:()}, y: ${2:()} }$0",
567 detail: "Foo { x: i32, y: i32 }",
575 fn enum_detail_includes_tuple_fields() {
578 enum Foo { Foo (i32, i32) }
580 fn main() { Foo::Fo$0 }
587 source_range: 46..48,
589 insert: "Foo(${1:()}, ${2:()})$0",
593 detail: "Foo(i32, i32)",
601 fn fn_detail_includes_args_and_return_type() {
604 fn foo<T>(a: u32, b: u32, t: T) -> (u32, T) { (a, t) }
608 SymbolKind::Function,
613 source_range: 68..70,
615 insert: "foo(${1:a}, ${2:b}, ${3:t})$0",
620 detail: "fn(u32, u32, T) -> (u32, T)",
621 trigger_call_info: true,
625 source_range: 68..70,
640 fn enum_detail_just_name_for_unit() {
645 fn main() { Foo::Fo$0 }
652 source_range: 35..37,
666 fn lookup_enums_by_two_qualifiers() {
670 pub enum Spam { Foo, Bar(i32) }
672 fn main() { let _: m::Spam = S$0 }
675 CompletionItemKind::SymbolKind(SymbolKind::Function),
676 CompletionItemKind::SymbolKind(SymbolKind::Module),
677 CompletionItemKind::SymbolKind(SymbolKind::Variant),
683 source_range: 75..76,
694 source_range: 75..76,
702 label: "m::Spam::Bar(…)",
703 source_range: 75..76,
705 insert: "m::Spam::Bar(${1:()})$0",
709 lookup: "Spam::Bar(…)",
710 detail: "m::Spam::Bar(i32)",
711 relevance: CompletionRelevance {
712 exact_name_match: false,
717 is_item_from_trait: false,
718 is_name_already_imported: false,
719 requires_import: false,
721 is_private_editable: false,
727 label: "m::Spam::Foo",
728 source_range: 75..76,
730 insert: "m::Spam::Foo$0",
735 detail: "m::Spam::Foo",
736 relevance: CompletionRelevance {
737 exact_name_match: false,
742 is_item_from_trait: false,
743 is_name_already_imported: false,
744 requires_import: false,
746 is_private_editable: false,
757 fn sets_deprecated_flag_in_items() {
761 fn something_deprecated() {}
765 SymbolKind::Function,
770 source_range: 56..59,
780 label: "something_deprecated()",
781 source_range: 56..59,
783 insert: "something_deprecated()$0",
787 lookup: "something_deprecated",
797 struct A { #[deprecated] the_field: u32 }
798 fn foo() { A { the$0 } }
805 source_range: 57..60,
813 relevance: CompletionRelevance {
814 exact_name_match: false,
819 is_item_from_trait: false,
820 is_name_already_imported: false,
821 requires_import: false,
823 is_private_editable: false,
843 fn bar(self) { self.$0 }
845 &[CompletionItemKind::Method, CompletionItemKind::SymbolKind(SymbolKind::Field)],
850 source_range: 94..94,
856 documentation: Documentation(
862 source_range: 94..94,
869 documentation: Documentation(
892 CompletionItemKind::SymbolKind(SymbolKind::Module),
893 CompletionItemKind::SymbolKind(SymbolKind::Variant),
894 CompletionItemKind::SymbolKind(SymbolKind::Enum),
900 source_range: 10..12,
906 documentation: Documentation(
912 source_range: 10..12,
919 documentation: Documentation(
925 source_range: 10..12,
931 documentation: Documentation(
941 fn dont_render_attrs() {
947 fn the_method(&self) { }
949 fn foo(s: S) { s.$0 }
951 CompletionItemKind::Method,
955 label: "the_method()",
956 source_range: 81..81,
958 insert: "the_method()$0",
960 lookup: "the_method",
969 fn no_call_parens_if_fn_ptr_needed() {
970 cov_mark::check!(no_call_parens_if_fn_ptr_needed);
974 fn foo(foo: u8, bar: u8) {}
975 struct ManualVtable { f: fn(u8, u8) }
977 fn main() -> ManualVtable {
978 ManualVtable { f: f$0 }
982 fn foo(foo: u8, bar: u8) {}
983 struct ManualVtable { f: fn(u8, u8) }
985 fn main() -> ManualVtable {
986 ManualVtable { f: foo }
993 struct RawIdentTable { r#type: u32 }
995 fn main() -> RawIdentTable {
996 RawIdentTable { t$0: 42 }
1000 struct RawIdentTable { r#type: u32 }
1002 fn main() -> RawIdentTable {
1003 RawIdentTable { r#type: 42 }
1010 fn no_parens_in_use_item() {
1014 mod m { pub fn foo() {} }
1018 mod m { pub fn foo() {} }
1025 fn no_parens_in_call() {
1030 fn main() { f$0(); }
1034 fn main() { foo(); }
1041 impl Foo { fn foo(&self){} }
1042 fn f(foo: &Foo) { foo.f$0(); }
1046 impl Foo { fn foo(&self){} }
1047 fn f(foo: &Foo) { foo.foo(); }
1053 fn inserts_angle_brackets_for_generics() {
1054 cov_mark::check!(inserts_angle_brackets_for_generics);
1080 struct Vec<T = i128> {}
1084 struct Vec<T = i128> {}
1092 fn foo(xs: Ve$0<i128>)
1096 fn foo(xs: Vec<i128>)
1102 fn active_param_relevance() {
1105 struct S { foo: i64, bar: u32, baz: u32 }
1106 fn test(bar: u32) { }
1107 fn foo(s: S) { test(s.$0) }
1118 fn record_field_relevances() {
1121 struct A { foo: i64, bar: u32, baz: u32 }
1122 struct B { x: (), y: f32, bar: u32 }
1123 fn foo(a: A) { B { bar: a.$0 }; }
1134 fn record_field_and_call_relevances() {
1137 struct A { foo: i64, bar: u32, baz: u32 }
1138 struct B { x: (), y: f32, bar: u32 }
1140 fn foo(a: A) { B { bar: f(a.$0) }; }
1150 struct A { foo: i64, bar: u32, baz: u32 }
1151 struct B { x: (), y: f32, bar: u32 }
1153 fn foo(a: A) { f(B { bar: a.$0 }); }
1164 fn prioritize_exact_ref_match() {
1167 struct WorldSnapshot { _f: () };
1168 fn go(world: &WorldSnapshot) { go(w$0) }
1171 lc world [type+name+local]
1172 st WorldSnapshot {…} []
1173 st &WorldSnapshot {…} [type]
1181 fn too_many_arguments() {
1182 cov_mark::check!(too_many_arguments);
1186 fn f(foo: &Foo) { f(foo, w$0) }
1197 fn score_fn_type_and_name_match() {
1200 struct A { bar: u8 }
1201 fn baz() -> u8 { 0 }
1202 fn bar() -> u8 { 0 }
1203 fn f() { A { bar: b$0 }; }
1206 fn bar() [type+name]
1215 fn score_method_type_and_name_match() {
1221 fn aaa(&self) -> u32 { 0 }
1222 fn bbb(&self) -> u32 { 0 }
1223 fn ccc(&self) -> u64 { 0 }
1230 me aaa() [type+name]
1238 fn score_method_name_match_only() {
1244 fn aaa(&self) -> u64 { 0 }
1257 fn suggest_ref_mut() {
1258 cov_mark::check!(suggest_ref);
1262 fn foo(s: &mut S) {}
1270 lc &mut s [type+name+local]
1281 fn foo(s: &mut S) {}
1288 lc s [type+name+local]
1298 fn foo(s: &mut S) {}
1305 lc ssss [type+local]
1315 fn suggest_deref() {
1322 impl core::ops::Deref for T {
1325 fn deref(&self) -> &Self::Target {
1355 fn suggest_deref_mut() {
1358 //- minicore: deref_mut
1362 impl core::ops::Deref for T {
1365 fn deref(&self) -> &Self::Target {
1370 impl core::ops::DerefMut for T {
1371 fn deref_mut(&mut self) -> &mut Self::Target {
1376 fn foo(s: &mut S) {}
1388 lc &mut t [type+local]
1461 fn suggest_deref_fn_ret() {
1468 impl core::ops::Deref for T {
1471 fn deref(&self) -> &Self::Target {
1498 fn op_function_relevances() {
1503 fn sub(self, other: Self) -> Self { self }
1506 fn foo(a: u32) { a.$0 }
1509 me sub(…) (as Sub) [op_method]
1519 pub trait PartialEq<Rhs: ?Sized = Self> {
1520 fn eq(&self, other: &Rhs) -> bool;
1521 fn ne(&self, other: &Rhs) -> bool;
1524 impl PartialEq for Foo {}
1531 me eq(…) (as PartialEq) [op_method]
1532 me ne(…) (as PartialEq) [op_method]
1538 fn struct_field_method_ref() {
1541 struct Foo { bar: u32 }
1542 impl Foo { fn baz(&self) -> u32 { 0 } }
1544 fn foo(f: Foo) { let _: &u32 = f.b$0 }
1546 &[CompletionItemKind::Method, CompletionItemKind::SymbolKind(SymbolKind::Field)],
1551 source_range: 98..99,
1556 detail: "fn(&self) -> u32",
1561 source_range: 98..99,
1576 fn qualified_path_ref() {
1592 &[CompletionItemKind::SymbolKind(SymbolKind::Function)],
1597 source_range: 95..95,
1604 detail: "fn() -> S",
1616 enum Foo<T> { A(T), B }
1617 // bar() should not be an exact type match
1618 // because the generic parameters are different
1619 fn bar() -> Foo<u8> { Foo::B }
1620 // FIXME baz() should be an exact type match
1621 // because the types could unify, but it currently
1622 // is not. This is due to the T here being
1623 // TyKind::Placeholder rather than TyKind::Missing.
1624 fn baz<T>() -> Foo<T> { Foo::B }
1626 let foo: Foo<u32> = Foo::B;
1627 let _: Foo<u32> = f$0;
1632 ev Foo::A(…) [type_could_unify]
1633 ev Foo::B [type_could_unify]
1643 fn postfix_exact_match_is_high_priority() {
1644 cov_mark::check!(postfix_exact_match_is_high_priority);
1645 check_relevance_for_kinds(
1650 fn not(self) -> Self::Output;
1655 fn not(self) -> bool { if self { false } else { true }}
1660 let _: bool = (9 > 2).not$0;
1663 &[CompletionItemKind::Snippet, CompletionItemKind::Method],
1666 me not() (use ops::Not) [type_could_unify+requires_import]
1681 fn postfix_inexact_match_is_low_priority() {
1682 cov_mark::check!(postfix_inexact_match_is_low_priority);
1683 check_relevance_for_kinds(
1693 &[CompletionItemKind::Snippet, CompletionItemKind::Method],
1710 fn flyimport_reduced_relevance() {
1715 pub trait BufRead {}
1716 pub struct BufReader;
1717 pub struct BufWriter;
1730 tt BufRead (use std::io::BufRead) [requires_import]
1731 st BufReader (use std::io::BufReader) [requires_import]
1732 st BufWriter (use std::io::BufWriter) [requires_import]
1738 fn completes_struct_with_raw_identifier() {
1742 mod m { pub struct r#type {} }
1744 let r#type = m::t$0;
1748 mod m { pub struct r#type {} }
1750 let r#type = m::r#type;
1757 fn completes_fn_with_raw_identifier() {
1761 mod m { pub fn r#type {} }
1767 mod m { pub fn r#type {} }
1776 fn completes_macro_with_raw_identifier() {
1780 macro_rules! r#let { () => {} }
1786 macro_rules! r#let { () => {} }
1795 fn completes_variant_with_raw_identifier() {
1814 fn completes_field_with_raw_identifier() {
1819 pub struct r#struct {
1825 let a = r#type::r#struct {};
1831 pub struct r#struct {
1837 let a = r#type::r#struct {};
1845 fn completes_const_with_raw_identifier() {
1850 impl r#struct { pub const r#type: u8 = 1; }
1857 impl r#struct { pub const r#type: u8 = 1; }
1866 fn completes_type_alias_with_raw_identifier() {
1871 trait r#trait { type r#type; }
1872 impl r#trait for r#struct { type t$0 }
1876 trait r#trait { type r#type; }
1877 impl r#trait for r#struct { type r#type = $0; }
1883 fn field_access_includes_self() {