1 //! See `CompletionContext` structure.
3 use base_db::SourceDatabaseExt;
4 use hir::{Local, ScopeDef, Semantics, SemanticsScope, Type};
6 base_db::{FilePosition, SourceDatabase},
7 call_info::ActiveParameter,
11 algo::find_node_at_offset,
12 ast::{self, NameOrNameRef, NameOwner},
13 match_ast, AstNode, NodeOrToken,
14 SyntaxKind::{self, *},
15 SyntaxNode, SyntaxToken, TextRange, TextSize, T,
21 determine_location, determine_prev_sibling, for_is_prev2, inside_impl_trait_block,
22 is_in_loop_body, previous_token, ImmediateLocation, ImmediatePrevSibling,
27 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
28 pub(crate) enum PatternRefutability {
34 pub(super) enum PathKind {
40 pub(crate) struct PathCompletionContext {
41 /// If this is a call with () already there
42 call_kind: Option<CallKind>,
43 /// A single-indent path, like `foo`. `::foo` should not be considered a trivial path.
44 pub(super) is_trivial_path: bool,
45 /// If not a trivial path, the prefix (qualifier).
46 pub(super) qualifier: Option<ast::Path>,
47 /// Whether the qualifier comes from a use tree parent or not
48 pub(super) use_tree_parent: bool,
49 pub(super) kind: Option<PathKind>,
50 /// Whether the path segment has type args or not.
51 pub(super) has_type_args: bool,
52 /// `true` if we are a statement or a last expr in the block.
53 pub(super) can_be_stmt: bool,
54 pub(super) in_loop_body: bool,
57 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
58 pub(crate) enum CallKind {
63 /// `CompletionContext` is created early during completion to figure out, where
64 /// exactly is the cursor, syntax-wise.
66 pub(crate) struct CompletionContext<'a> {
67 pub(super) sema: Semantics<'a, RootDatabase>,
68 pub(super) scope: SemanticsScope<'a>,
69 pub(super) db: &'a RootDatabase,
70 pub(super) config: &'a CompletionConfig,
71 pub(super) position: FilePosition,
72 /// The token before the cursor, in the original file.
73 pub(super) original_token: SyntaxToken,
74 /// The token before the cursor, in the macro-expanded file.
75 pub(super) token: SyntaxToken,
76 pub(super) krate: Option<hir::Crate>,
77 pub(super) expected_name: Option<NameOrNameRef>,
78 pub(super) expected_type: Option<Type>,
80 /// The parent function of the cursor position if it exists.
81 pub(super) function_def: Option<ast::Fn>,
82 /// The parent impl of the cursor position if it exists.
83 pub(super) impl_def: Option<ast::Impl>,
84 pub(super) name_ref_syntax: Option<ast::NameRef>,
86 // potentially set if we are completing a lifetime
87 pub(super) lifetime_syntax: Option<ast::Lifetime>,
88 pub(super) lifetime_param_syntax: Option<ast::LifetimeParam>,
89 pub(super) lifetime_allowed: bool,
90 pub(super) is_label_ref: bool,
92 // potentially set if we are completing a name
93 pub(super) is_pat_or_const: Option<PatternRefutability>,
94 pub(super) is_param: bool,
96 pub(super) completion_location: Option<ImmediateLocation>,
97 pub(super) prev_sibling: Option<ImmediatePrevSibling>,
98 pub(super) attribute_under_caret: Option<ast::Attr>,
99 pub(super) previous_token: Option<SyntaxToken>,
101 pub(super) path_context: Option<PathCompletionContext>,
102 pub(super) active_parameter: Option<ActiveParameter>,
103 pub(super) locals: Vec<(String, Local)>,
105 pub(super) incomplete_let: bool,
107 no_completion_required: bool,
110 impl<'a> CompletionContext<'a> {
112 db: &'a RootDatabase,
113 position: FilePosition,
114 config: &'a CompletionConfig,
115 ) -> Option<CompletionContext<'a>> {
116 let sema = Semantics::new(db);
118 let original_file = sema.parse(position.file_id);
120 // Insert a fake ident to get a valid parse tree. We will use this file
121 // to determine context, though the original_file will be used for
122 // actual completion.
123 let file_with_fake_ident = {
124 let parse = db.parse(position.file_id);
125 let edit = Indel::insert(position.offset, "intellijRulezz".to_string());
126 parse.reparse(&edit).tree()
128 let fake_ident_token =
129 file_with_fake_ident.syntax().token_at_offset(position.offset).right_biased().unwrap();
131 let krate = sema.to_module_def(position.file_id).map(|m| m.krate());
133 original_file.syntax().token_at_offset(position.offset).left_biased()?;
134 let token = sema.descend_into_macros(original_token.clone());
135 let scope = sema.scope_at_offset(&token, position.offset);
136 let mut locals = vec![];
137 scope.process_all_names(&mut |name, scope| {
138 if let ScopeDef::Local(local) = scope {
139 locals.push((name.to_string(), local));
142 let mut ctx = CompletionContext {
155 name_ref_syntax: None,
156 lifetime_syntax: None,
157 lifetime_param_syntax: None,
158 lifetime_allowed: false,
160 is_pat_or_const: None,
162 completion_location: None,
164 attribute_under_caret: None,
165 previous_token: None,
167 active_parameter: ActiveParameter::at(db, position),
169 incomplete_let: false,
170 no_completion_required: false,
173 let mut original_file = original_file.syntax().clone();
174 let mut speculative_file = file_with_fake_ident.syntax().clone();
175 let mut offset = position.offset;
176 let mut fake_ident_token = fake_ident_token;
178 // Are we inside a macro call?
179 while let (Some(actual_macro_call), Some(macro_call_with_fake_ident)) = (
180 find_node_at_offset::<ast::MacroCall>(&original_file, offset),
181 find_node_at_offset::<ast::MacroCall>(&speculative_file, offset),
183 if actual_macro_call.path().as_ref().map(|s| s.syntax().text())
184 != macro_call_with_fake_ident.path().as_ref().map(|s| s.syntax().text())
188 let speculative_args = match macro_call_with_fake_ident.token_tree() {
192 if let (Some(actual_expansion), Some(speculative_expansion)) = (
193 ctx.sema.expand(&actual_macro_call),
194 ctx.sema.speculative_expand(
200 let new_offset = speculative_expansion.1.text_range().start();
201 if new_offset > actual_expansion.text_range().end() {
204 original_file = actual_expansion;
205 speculative_file = speculative_expansion.0;
206 fake_ident_token = speculative_expansion.1;
212 ctx.fill(&original_file, speculative_file, offset);
216 /// Checks whether completions in that particular case don't make much sense.
218 /// - `fn $0` -- we expect function name, it's unlikely that "hint" will be helpful.
219 /// Exception for this case is `impl Trait for Foo`, where we would like to hint trait method names.
220 /// - `for _ i$0` -- obviously, it'll be "in" keyword.
221 pub(crate) fn no_completion_required(&self) -> bool {
222 self.no_completion_required
225 /// The range of the identifier that is being completed.
226 pub(crate) fn source_range(&self) -> TextRange {
227 // check kind of macro-expanded token, but use range of original token
228 let kind = self.token.kind();
229 if kind == IDENT || kind == LIFETIME_IDENT || kind == UNDERSCORE || kind.is_keyword() {
230 cov_mark::hit!(completes_if_prefix_is_keyword);
231 self.original_token.text_range()
232 } else if kind == CHAR {
233 // assume we are completing a lifetime but the user has only typed the '
234 cov_mark::hit!(completes_if_lifetime_without_idents);
235 TextRange::at(self.original_token.text_range().start(), TextSize::from(1))
237 TextRange::empty(self.position.offset)
241 pub(crate) fn previous_token_is(&self, kind: SyntaxKind) -> bool {
242 self.previous_token.as_ref().map_or(false, |tok| tok.kind() == kind)
245 pub(crate) fn expects_assoc_item(&self) -> bool {
246 matches!(self.completion_location, Some(ImmediateLocation::Trait | ImmediateLocation::Impl))
249 pub(crate) fn has_dot_receiver(&self) -> bool {
251 &self.completion_location,
252 Some(ImmediateLocation::FieldAccess { receiver, .. } | ImmediateLocation::MethodCall { receiver,.. })
253 if receiver.is_some()
257 pub(crate) fn dot_receiver(&self) -> Option<&ast::Expr> {
258 match &self.completion_location {
260 ImmediateLocation::MethodCall { receiver, .. }
261 | ImmediateLocation::FieldAccess { receiver, .. },
262 ) => receiver.as_ref(),
267 pub(crate) fn expects_non_trait_assoc_item(&self) -> bool {
268 matches!(self.completion_location, Some(ImmediateLocation::Impl))
271 pub(crate) fn expects_item(&self) -> bool {
272 matches!(self.completion_location, Some(ImmediateLocation::ItemList))
275 pub(crate) fn expects_generic_arg(&self) -> bool {
276 matches!(self.completion_location, Some(ImmediateLocation::GenericArgList(_)))
279 pub(crate) fn has_block_expr_parent(&self) -> bool {
280 matches!(self.completion_location, Some(ImmediateLocation::BlockExpr))
283 pub(crate) fn expects_ident_pat_or_ref_expr(&self) -> bool {
285 self.completion_location,
286 Some(ImmediateLocation::IdentPat | ImmediateLocation::RefExpr)
290 pub(crate) fn expect_field(&self) -> bool {
292 self.completion_location,
293 Some(ImmediateLocation::RecordField | ImmediateLocation::TupleField)
297 pub(crate) fn in_use_tree(&self) -> bool {
299 self.completion_location,
300 Some(ImmediateLocation::Use | ImmediateLocation::UseTree)
304 pub(crate) fn has_impl_or_trait_prev_sibling(&self) -> bool {
307 Some(ImmediatePrevSibling::ImplDefType | ImmediatePrevSibling::TraitDefName)
311 pub(crate) fn has_impl_prev_sibling(&self) -> bool {
312 matches!(self.prev_sibling, Some(ImmediatePrevSibling::ImplDefType))
315 pub(crate) fn has_visibility_prev_sibling(&self) -> bool {
316 matches!(self.prev_sibling, Some(ImmediatePrevSibling::Visibility))
319 pub(crate) fn after_if(&self) -> bool {
320 matches!(self.prev_sibling, Some(ImmediatePrevSibling::IfExpr))
323 pub(crate) fn is_path_disallowed(&self) -> bool {
324 self.attribute_under_caret.is_some()
325 || self.previous_token_is(T![unsafe])
328 Some(ImmediatePrevSibling::Attribute | ImmediatePrevSibling::Visibility)
331 self.completion_location,
333 ImmediateLocation::Attribute(_)
334 | ImmediateLocation::ModDeclaration(_)
335 | ImmediateLocation::RecordPat(_)
336 | ImmediateLocation::RecordExpr(_)
341 pub(crate) fn expects_expression(&self) -> bool {
342 matches!(self.path_context, Some(PathCompletionContext { kind: Some(PathKind::Expr), .. }))
345 pub(crate) fn expects_type(&self) -> bool {
346 matches!(self.path_context, Some(PathCompletionContext { kind: Some(PathKind::Type), .. }))
349 pub(crate) fn path_call_kind(&self) -> Option<CallKind> {
350 self.path_context.as_ref().and_then(|it| it.call_kind)
353 pub(crate) fn is_trivial_path(&self) -> bool {
354 matches!(self.path_context, Some(PathCompletionContext { is_trivial_path: true, .. }))
357 pub(crate) fn is_non_trivial_path(&self) -> bool {
358 matches!(self.path_context, Some(PathCompletionContext { is_trivial_path: false, .. }))
361 pub(crate) fn path_qual(&self) -> Option<&ast::Path> {
362 self.path_context.as_ref().and_then(|it| it.qualifier.as_ref())
365 /// Checks if an item is visible and not `doc(hidden)` at the completion site.
366 pub(crate) fn is_visible<I>(&self, item: &I) -> bool
368 I: hir::HasVisibility + hir::HasAttrs + hir::HasCrate + Copy,
370 self.is_visible_impl(&item.visibility(self.db), &item.attrs(self.db), item.krate(self.db))
375 vis: &hir::Visibility,
377 defining_crate: hir::Crate,
379 let module = match self.scope.module() {
381 None => return false,
383 if !vis.is_visible_from(self.db, module.into()) {
384 // If the definition location is editable, also show private items
385 let root_file = defining_crate.root_file(self.db);
386 let source_root_id = self.db.file_source_root(root_file);
387 let is_editable = !self.db.source_root(source_root_id).is_library;
391 if module.krate() != defining_crate && attrs.has_doc_hidden() {
392 // `doc(hidden)` items are only completed within the defining crate.
399 fn fill_impl_def(&mut self) {
402 .token_ancestors_with_macros(self.token.clone())
403 .take_while(|it| it.kind() != SOURCE_FILE && it.kind() != MODULE)
404 .find_map(ast::Impl::cast);
407 fn expected_type_and_name(&self) -> (Option<Type>, Option<NameOrNameRef>) {
408 let mut node = match self.token.parent() {
410 None => return (None, None),
415 ast::LetStmt(it) => {
416 cov_mark::hit!(expected_type_let_with_leading_char);
417 cov_mark::hit!(expected_type_let_without_leading_char);
419 .and_then(|pat| self.sema.type_of_pat(&pat))
420 .or_else(|| it.initializer().and_then(|it| self.sema.type_of_expr(&it)));
421 let name = if let Some(ast::Pat::IdentPat(ident)) = it.pat() {
422 ident.name().map(NameOrNameRef::Name)
429 ast::ArgList(_it) => {
430 cov_mark::hit!(expected_type_fn_param);
431 ActiveParameter::at_token(
435 let name = ap.ident().map(NameOrNameRef::Name);
436 let ty = if has_ref(&self.token) {
437 cov_mark::hit!(expected_type_fn_param_ref);
444 .unwrap_or((None, None))
446 ast::RecordExprFieldList(_it) => {
447 cov_mark::hit!(expected_type_struct_field_without_leading_char);
448 // wouldn't try {} be nice...
450 let expr_field = self.token.prev_sibling_or_token()?
452 .and_then(ast::RecordExprField::cast)?;
453 let (_, _, ty) = self.sema.resolve_record_field(&expr_field)?;
456 expr_field.field_name().map(NameOrNameRef::NameRef),
458 })().unwrap_or((None, None))
460 ast::RecordExprField(it) => {
461 cov_mark::hit!(expected_type_struct_field_with_leading_char);
463 it.expr().as_ref().and_then(|e| self.sema.type_of_expr(e)),
464 it.field_name().map(NameOrNameRef::NameRef),
467 ast::MatchExpr(it) => {
468 cov_mark::hit!(expected_type_match_arm_without_leading_char);
470 .and_then(|e| self.sema.type_of_expr(&e));
474 cov_mark::hit!(expected_type_if_let_without_leading_char);
475 let ty = it.condition()
476 .and_then(|cond| cond.expr())
477 .and_then(|e| self.sema.type_of_expr(&e));
480 ast::IdentPat(it) => {
481 cov_mark::hit!(expected_type_if_let_with_leading_char);
482 cov_mark::hit!(expected_type_match_arm_with_leading_char);
483 let ty = self.sema.type_of_pat(&ast::Pat::from(it));
487 cov_mark::hit!(expected_type_fn_ret_with_leading_char);
488 cov_mark::hit!(expected_type_fn_ret_without_leading_char);
489 let def = self.sema.to_def(&it);
490 (def.map(|def| def.ret_type(self.db)), None)
492 ast::ClosureExpr(it) => {
493 let ty = self.sema.type_of_expr(&it.into());
494 ty.and_then(|ty| ty.as_callable(self.db))
495 .map(|c| (Some(c.return_type()), None))
496 .unwrap_or((None, None))
498 ast::Stmt(_it) => (None, None),
500 match node.parent() {
505 None => (None, None),
515 original_file: &SyntaxNode,
516 file_with_fake_ident: SyntaxNode,
519 let fake_ident_token = file_with_fake_ident.token_at_offset(offset).right_biased().unwrap();
520 let syntax_element = NodeOrToken::Token(fake_ident_token);
521 self.previous_token = previous_token(syntax_element.clone());
522 self.attribute_under_caret = syntax_element.ancestors().find_map(ast::Attr::cast);
523 self.no_completion_required = {
524 let inside_impl_trait_block = inside_impl_trait_block(syntax_element.clone());
525 let fn_is_prev = self.previous_token_is(T![fn]);
526 let for_is_prev2 = for_is_prev2(syntax_element.clone());
527 (fn_is_prev && !inside_impl_trait_block) || for_is_prev2
530 self.incomplete_let =
531 syntax_element.ancestors().take(6).find_map(ast::LetStmt::cast).map_or(false, |it| {
532 it.syntax().text_range().end() == syntax_element.text_range().end()
535 let (expected_type, expected_name) = self.expected_type_and_name();
536 self.expected_type = expected_type;
537 self.expected_name = expected_name;
539 let name_like = match find_node_at_offset(&file_with_fake_ident, offset) {
543 self.completion_location =
544 determine_location(&self.sema, original_file, offset, &name_like);
545 self.prev_sibling = determine_prev_sibling(&name_like);
547 ast::NameLike::Lifetime(lifetime) => {
548 self.classify_lifetime(original_file, lifetime, offset);
550 ast::NameLike::NameRef(name_ref) => {
551 self.classify_name_ref(original_file, name_ref);
553 ast::NameLike::Name(name) => {
554 self.classify_name(name);
559 fn classify_lifetime(
561 original_file: &SyntaxNode,
562 lifetime: ast::Lifetime,
565 self.lifetime_syntax =
566 find_node_at_offset(original_file, lifetime.syntax().text_range().start());
567 if let Some(parent) = lifetime.syntax().parent() {
568 if parent.kind() == ERROR {
574 ast::LifetimeParam(_it) => {
575 self.lifetime_allowed = true;
576 self.lifetime_param_syntax =
577 self.sema.find_node_at_offset_with_macros(original_file, offset);
579 ast::BreakExpr(_it) => self.is_label_ref = true,
580 ast::ContinueExpr(_it) => self.is_label_ref = true,
581 ast::Label(_it) => (),
582 _ => self.lifetime_allowed = true,
588 fn classify_name(&mut self, name: ast::Name) {
589 if let Some(bind_pat) = name.syntax().parent().and_then(ast::IdentPat::cast) {
590 self.is_pat_or_const = Some(PatternRefutability::Refutable);
591 // if any of these is here our bind pat can't be a const pat anymore
592 let complex_ident_pat = bind_pat.at_token().is_some()
593 || bind_pat.ref_token().is_some()
594 || bind_pat.mut_token().is_some();
595 if complex_ident_pat {
596 self.is_pat_or_const = None;
598 let irrefutable_pat = bind_pat.syntax().ancestors().find_map(|node| {
601 ast::LetStmt(it) => Some(it.pat()),
602 ast::Param(it) => Some(it.pat()),
607 if let Some(Some(pat)) = irrefutable_pat {
608 // This check is here since we could be inside a pattern in the initializer expression of the let statement.
609 if pat.syntax().text_range().contains_range(bind_pat.syntax().text_range()) {
610 self.is_pat_or_const = Some(PatternRefutability::Irrefutable);
614 let is_name_in_field_pat = bind_pat
617 .and_then(ast::RecordPatField::cast)
618 .map_or(false, |pat_field| pat_field.name_ref().is_none());
619 if is_name_in_field_pat {
620 self.is_pat_or_const = None;
624 self.fill_impl_def();
627 self.is_param |= is_node::<ast::Param>(name.syntax());
630 fn classify_name_ref(&mut self, original_file: &SyntaxNode, name_ref: ast::NameRef) {
631 self.fill_impl_def();
633 self.name_ref_syntax =
634 find_node_at_offset(original_file, name_ref.syntax().text_range().start());
636 self.function_def = self
638 .token_ancestors_with_macros(self.token.clone())
639 .take_while(|it| it.kind() != SOURCE_FILE && it.kind() != MODULE)
640 .find_map(ast::Fn::cast);
642 let parent = match name_ref.syntax().parent() {
647 if let Some(segment) = ast::PathSegment::cast(parent) {
648 let path_ctx = self.path_context.get_or_insert(PathCompletionContext {
650 is_trivial_path: false,
652 has_type_args: false,
655 use_tree_parent: false,
658 path_ctx.in_loop_body = is_in_loop_body(name_ref.syntax());
659 let path = segment.parent_path();
661 if let Some(p) = path.syntax().parent() {
662 path_ctx.call_kind = match_ast! {
664 ast::PathExpr(it) => it.syntax().parent().and_then(ast::CallExpr::cast).map(|_| CallKind::Expr),
665 ast::MacroCall(it) => it.excl_token().and(Some(CallKind::Mac)),
666 ast::TupleStructPat(_it) => Some(CallKind::Pat),
672 if let Some(parent) = path.syntax().parent() {
673 path_ctx.kind = match_ast! {
675 ast::PathType(_it) => Some(PathKind::Type),
676 ast::PathExpr(_it) => Some(PathKind::Expr),
681 path_ctx.has_type_args = segment.generic_arg_list().is_some();
683 if let Some((path, use_tree_parent)) = path_or_use_tree_qualifier(&path) {
684 path_ctx.use_tree_parent = use_tree_parent;
685 path_ctx.qualifier = path
688 find_node_with_range::<ast::PathSegment>(
690 it.syntax().text_range(),
693 .map(|it| it.parent_path());
697 if let Some(segment) = path.segment() {
698 if segment.coloncolon_token().is_some() {
703 path_ctx.is_trivial_path = true;
705 // Find either enclosing expr statement (thing with `;`) or a
706 // block. If block, check that we are the last expr.
707 path_ctx.can_be_stmt = name_ref
711 if let Some(stmt) = ast::ExprStmt::cast(node.clone()) {
712 return Some(stmt.syntax().text_range() == name_ref.syntax().text_range());
714 if let Some(block) = ast::BlockExpr::cast(node) {
716 block.tail_expr().map(|e| e.syntax().text_range())
717 == Some(name_ref.syntax().text_range()),
727 fn find_node_with_range<N: AstNode>(syntax: &SyntaxNode, range: TextRange) -> Option<N> {
728 syntax.covering_element(range).ancestors().find_map(N::cast)
731 fn is_node<N: AstNode>(node: &SyntaxNode) -> bool {
732 match node.ancestors().find_map(N::cast) {
734 Some(n) => n.syntax().text_range() == node.text_range(),
738 fn path_or_use_tree_qualifier(path: &ast::Path) -> Option<(ast::Path, bool)> {
739 if let Some(qual) = path.qualifier() {
740 return Some((qual, false));
742 let use_tree_list = path.syntax().ancestors().find_map(ast::UseTreeList::cast)?;
743 let use_tree = use_tree_list.syntax().parent().and_then(ast::UseTree::cast)?;
744 use_tree.path().zip(Some(true))
747 fn has_ref(token: &SyntaxToken) -> bool {
748 let mut token = token.clone();
749 for skip in [WHITESPACE, IDENT, T![mut]] {
750 if token.kind() == skip {
751 token = match token.prev_token() {
753 None => return false,
757 token.kind() == T![&]
762 use expect_test::{expect, Expect};
765 use crate::tests::{position, TEST_CONFIG};
767 use super::CompletionContext;
769 fn check_expected_type_and_name(ra_fixture: &str, expect: Expect) {
770 let (db, pos) = position(ra_fixture);
771 let completion_context = CompletionContext::new(&db, pos, &TEST_CONFIG).unwrap();
773 let ty = completion_context
775 .map(|t| t.display_test(&db).to_string())
776 .unwrap_or("?".to_owned());
778 let name = completion_context
780 .map_or_else(|| "?".to_owned(), |name| name.to_string());
782 expect.assert_eq(&format!("ty: {}, name: {}", ty, name));
786 fn expected_type_let_without_leading_char() {
787 cov_mark::check!(expected_type_let_without_leading_char);
788 check_expected_type_and_name(
794 expect![[r#"ty: u32, name: x"#]],
799 fn expected_type_let_with_leading_char() {
800 cov_mark::check!(expected_type_let_with_leading_char);
801 check_expected_type_and_name(
807 expect![[r#"ty: u32, name: x"#]],
812 fn expected_type_let_pat() {
813 check_expected_type_and_name(
819 expect![[r#"ty: u32, name: ?"#]],
821 check_expected_type_and_name(
827 expect![[r#"ty: u32, name: ?"#]],
832 fn expected_type_fn_param() {
833 cov_mark::check!(expected_type_fn_param);
834 check_expected_type_and_name(
836 fn foo() { bar($0); }
839 expect![[r#"ty: u32, name: x"#]],
841 check_expected_type_and_name(
843 fn foo() { bar(c$0); }
846 expect![[r#"ty: u32, name: x"#]],
851 fn expected_type_fn_param_ref() {
852 cov_mark::check!(expected_type_fn_param_ref);
853 check_expected_type_and_name(
855 fn foo() { bar(&$0); }
858 expect![[r#"ty: u32, name: x"#]],
860 check_expected_type_and_name(
862 fn foo() { bar(&mut $0); }
863 fn bar(x: &mut u32) {}
865 expect![[r#"ty: u32, name: x"#]],
867 check_expected_type_and_name(
869 fn foo() { bar(&c$0); }
872 expect![[r#"ty: u32, name: x"#]],
877 fn expected_type_struct_field_without_leading_char() {
878 cov_mark::check!(expected_type_struct_field_without_leading_char);
879 check_expected_type_and_name(
881 struct Foo { a: u32 }
886 expect![[r#"ty: u32, name: a"#]],
891 fn expected_type_generic_struct_field() {
892 check_expected_type_and_name(
894 struct Foo<T> { a: T }
895 fn foo() -> Foo<u32> {
899 expect![[r#"ty: u32, name: a"#]],
904 fn expected_type_struct_field_with_leading_char() {
905 cov_mark::check!(expected_type_struct_field_with_leading_char);
906 check_expected_type_and_name(
908 struct Foo { a: u32 }
913 expect![[r#"ty: u32, name: a"#]],
918 fn expected_type_match_arm_without_leading_char() {
919 cov_mark::check!(expected_type_match_arm_without_leading_char);
920 check_expected_type_and_name(
927 expect![[r#"ty: E, name: ?"#]],
932 fn expected_type_match_arm_with_leading_char() {
933 cov_mark::check!(expected_type_match_arm_with_leading_char);
934 check_expected_type_and_name(
941 expect![[r#"ty: E, name: ?"#]],
946 fn expected_type_if_let_without_leading_char() {
947 cov_mark::check!(expected_type_if_let_without_leading_char);
948 check_expected_type_and_name(
950 enum Foo { Bar, Baz, Quux }
957 expect![[r#"ty: Foo, name: ?"#]],
962 fn expected_type_if_let_with_leading_char() {
963 cov_mark::check!(expected_type_if_let_with_leading_char);
964 check_expected_type_and_name(
966 enum Foo { Bar, Baz, Quux }
973 expect![[r#"ty: Foo, name: ?"#]],
978 fn expected_type_fn_ret_without_leading_char() {
979 cov_mark::check!(expected_type_fn_ret_without_leading_char);
980 check_expected_type_and_name(
986 expect![[r#"ty: u32, name: ?"#]],
991 fn expected_type_fn_ret_with_leading_char() {
992 cov_mark::check!(expected_type_fn_ret_with_leading_char);
993 check_expected_type_and_name(
999 expect![[r#"ty: u32, name: ?"#]],
1004 fn expected_type_fn_ret_fn_ref_fully_typed() {
1005 check_expected_type_and_name(
1011 expect![[r#"ty: u32, name: ?"#]],
1016 fn expected_type_closure_param_return() {
1017 // FIXME: make this work with `|| $0`
1018 check_expected_type_and_name(
1025 fn bar(f: impl FnOnce() -> u32) {}
1027 expect![[r#"ty: u32, name: ?"#]],
1032 fn expected_type_generic_function() {
1033 check_expected_type_and_name(
1041 expect![[r#"ty: u32, name: t"#]],
1046 fn expected_type_generic_method() {
1047 check_expected_type_and_name(
1055 fn bar(self, t: T) {}
1058 expect![[r#"ty: u32, name: t"#]],