1 //! See `CompletionContext` structure.
3 use hir::{Local, ScopeDef, Semantics, SemanticsScope, Type};
4 use ide_db::base_db::{FilePosition, SourceDatabase};
5 use ide_db::{call_info::ActiveParameter, RootDatabase};
7 algo::find_node_at_offset,
8 ast::{self, NameOrNameRef, NameOwner},
9 match_ast, AstNode, NodeOrToken,
11 SyntaxNode, SyntaxToken, TextRange, TextSize,
18 fn_is_prev, for_is_prev2, has_bind_pat_parent, has_block_expr_parent,
19 has_field_list_parent, has_impl_as_prev_sibling, has_impl_parent,
20 has_item_list_or_source_file_parent, has_ref_parent, has_trait_as_prev_sibling,
21 has_trait_parent, if_is_prev, inside_impl_trait_block, is_in_loop_body, is_match_arm,
27 /// `CompletionContext` is created early during completion to figure out, where
28 /// exactly is the cursor, syntax-wise.
30 pub(crate) struct CompletionContext<'a> {
31 pub(super) sema: Semantics<'a, RootDatabase>,
32 pub(super) scope: SemanticsScope<'a>,
33 pub(super) db: &'a RootDatabase,
34 pub(super) config: &'a CompletionConfig,
35 pub(super) position: FilePosition,
36 /// The token before the cursor, in the original file.
37 pub(super) original_token: SyntaxToken,
38 /// The token before the cursor, in the macro-expanded file.
39 pub(super) token: SyntaxToken,
40 pub(super) krate: Option<hir::Crate>,
41 pub(super) expected_name: Option<NameOrNameRef>,
42 pub(super) expected_type: Option<Type>,
43 pub(super) name_ref_syntax: Option<ast::NameRef>,
44 pub(super) lifetime_syntax: Option<ast::Lifetime>,
45 pub(super) lifetime_param_syntax: Option<ast::LifetimeParam>,
46 pub(super) function_syntax: Option<ast::Fn>,
47 pub(super) use_item_syntax: Option<ast::Use>,
48 pub(super) record_lit_syntax: Option<ast::RecordExpr>,
49 pub(super) record_pat_syntax: Option<ast::RecordPat>,
50 pub(super) record_field_syntax: Option<ast::RecordExprField>,
51 pub(super) impl_def: Option<ast::Impl>,
52 pub(super) lifetime_allowed: bool,
53 /// FIXME: `ActiveParameter` is string-based, which is very very wrong
54 pub(super) active_parameter: Option<ActiveParameter>,
55 pub(super) is_param: bool,
56 pub(super) is_label_ref: bool,
57 /// If a name-binding or reference to a const in a pattern.
58 /// Irrefutable patterns (like let) are excluded.
59 pub(super) is_pat_binding_or_const: bool,
60 pub(super) is_irrefutable_pat_binding: bool,
61 /// A single-indent path, like `foo`. `::foo` should not be considered a trivial path.
62 pub(super) is_trivial_path: bool,
63 /// If not a trivial path, the prefix (qualifier).
64 pub(super) path_qual: Option<ast::Path>,
65 pub(super) after_if: bool,
66 /// `true` if we are a statement or a last expr in the block.
67 pub(super) can_be_stmt: bool,
68 /// `true` if we expect an expression at the cursor position.
69 pub(super) is_expr: bool,
70 /// Something is typed at the "top" level, in module or impl/trait.
71 pub(super) is_new_item: bool,
72 /// The receiver if this is a field or method access, i.e. writing something.$0
73 pub(super) dot_receiver: Option<ast::Expr>,
74 pub(super) dot_receiver_is_ambiguous_float_literal: bool,
75 /// If this is a call (method or function) in particular, i.e. the () are already there.
76 pub(super) is_call: bool,
77 /// Like `is_call`, but for tuple patterns.
78 pub(super) is_pattern_call: bool,
79 /// If this is a macro call, i.e. the () are already there.
80 pub(super) is_macro_call: bool,
81 pub(super) is_path_type: bool,
82 pub(super) has_type_args: bool,
83 pub(super) attribute_under_caret: Option<ast::Attr>,
84 pub(super) mod_declaration_under_caret: Option<ast::Module>,
85 pub(super) unsafe_is_prev: bool,
86 pub(super) if_is_prev: bool,
87 pub(super) block_expr_parent: bool,
88 pub(super) bind_pat_parent: bool,
89 pub(super) ref_pat_parent: bool,
90 pub(super) in_loop_body: bool,
91 pub(super) has_trait_parent: bool,
92 pub(super) has_impl_parent: bool,
93 pub(super) inside_impl_trait_block: bool,
94 pub(super) has_field_list_parent: bool,
95 pub(super) trait_as_prev_sibling: bool,
96 pub(super) impl_as_prev_sibling: bool,
97 pub(super) is_match_arm: bool,
98 pub(super) has_item_list_or_source_file_parent: bool,
99 pub(super) for_is_prev2: bool,
100 pub(super) fn_is_prev: bool,
101 pub(super) incomplete_let: bool,
102 pub(super) locals: Vec<(String, Local)>,
105 impl<'a> CompletionContext<'a> {
107 db: &'a RootDatabase,
108 position: FilePosition,
109 config: &'a CompletionConfig,
110 ) -> Option<CompletionContext<'a>> {
111 let sema = Semantics::new(db);
113 let original_file = sema.parse(position.file_id);
115 // Insert a fake ident to get a valid parse tree. We will use this file
116 // to determine context, though the original_file will be used for
117 // actual completion.
118 let file_with_fake_ident = {
119 let parse = db.parse(position.file_id);
120 let edit = Indel::insert(position.offset, "intellijRulezz".to_string());
121 parse.reparse(&edit).tree()
123 let fake_ident_token =
124 file_with_fake_ident.syntax().token_at_offset(position.offset).right_biased().unwrap();
126 let krate = sema.to_module_def(position.file_id).map(|m| m.krate());
128 original_file.syntax().token_at_offset(position.offset).left_biased()?;
129 let token = sema.descend_into_macros(original_token.clone());
130 let scope = sema.scope_at_offset(&token, position.offset);
131 let mut locals = vec![];
132 scope.process_all_names(&mut |name, scope| {
133 if let ScopeDef::Local(local) = scope {
134 locals.push((name.to_string(), local));
137 let mut ctx = CompletionContext {
146 lifetime_allowed: false,
149 name_ref_syntax: None,
150 lifetime_syntax: None,
151 lifetime_param_syntax: None,
152 function_syntax: None,
153 use_item_syntax: None,
154 record_lit_syntax: None,
155 record_pat_syntax: None,
156 record_field_syntax: None,
158 active_parameter: ActiveParameter::at(db, position),
161 is_pat_binding_or_const: false,
162 is_irrefutable_pat_binding: false,
163 is_trivial_path: false,
170 dot_receiver_is_ambiguous_float_literal: false,
172 is_pattern_call: false,
173 is_macro_call: false,
175 has_type_args: false,
176 attribute_under_caret: None,
177 mod_declaration_under_caret: None,
178 unsafe_is_prev: false,
180 block_expr_parent: false,
181 bind_pat_parent: false,
182 ref_pat_parent: false,
184 has_trait_parent: false,
185 has_impl_parent: false,
186 inside_impl_trait_block: false,
187 has_field_list_parent: false,
188 trait_as_prev_sibling: false,
189 impl_as_prev_sibling: false,
191 has_item_list_or_source_file_parent: false,
194 incomplete_let: false,
198 let mut original_file = original_file.syntax().clone();
199 let mut hypothetical_file = file_with_fake_ident.syntax().clone();
200 let mut offset = position.offset;
201 let mut fake_ident_token = fake_ident_token;
203 // Are we inside a macro call?
204 while let (Some(actual_macro_call), Some(macro_call_with_fake_ident)) = (
205 find_node_at_offset::<ast::MacroCall>(&original_file, offset),
206 find_node_at_offset::<ast::MacroCall>(&hypothetical_file, offset),
208 if actual_macro_call.path().as_ref().map(|s| s.syntax().text())
209 != macro_call_with_fake_ident.path().as_ref().map(|s| s.syntax().text())
213 let hypothetical_args = match macro_call_with_fake_ident.token_tree() {
217 if let (Some(actual_expansion), Some(hypothetical_expansion)) = (
218 ctx.sema.expand(&actual_macro_call),
219 ctx.sema.speculative_expand(
225 let new_offset = hypothetical_expansion.1.text_range().start();
226 if new_offset > actual_expansion.text_range().end() {
229 original_file = actual_expansion;
230 hypothetical_file = hypothetical_expansion.0;
231 fake_ident_token = hypothetical_expansion.1;
237 ctx.fill_keyword_patterns(&hypothetical_file, offset);
238 ctx.fill(&original_file, hypothetical_file, offset);
242 /// Checks whether completions in that particular case don't make much sense.
244 /// - `fn $0` -- we expect function name, it's unlikely that "hint" will be helpful.
245 /// Exception for this case is `impl Trait for Foo`, where we would like to hint trait method names.
246 /// - `for _ i$0` -- obviously, it'll be "in" keyword.
247 pub(crate) fn no_completion_required(&self) -> bool {
248 (self.fn_is_prev && !self.inside_impl_trait_block) || self.for_is_prev2
251 /// The range of the identifier that is being completed.
252 pub(crate) fn source_range(&self) -> TextRange {
253 // check kind of macro-expanded token, but use range of original token
254 let kind = self.token.kind();
255 if kind == IDENT || kind == LIFETIME_IDENT || kind == UNDERSCORE || kind.is_keyword() {
256 cov_mark::hit!(completes_if_prefix_is_keyword);
257 self.original_token.text_range()
258 } else if kind == CHAR {
259 // assume we are completing a lifetime but the user has only typed the '
260 cov_mark::hit!(completes_if_lifetime_without_idents);
261 TextRange::at(self.original_token.text_range().start(), TextSize::from(1))
263 TextRange::empty(self.position.offset)
267 fn fill_keyword_patterns(&mut self, file_with_fake_ident: &SyntaxNode, offset: TextSize) {
268 let fake_ident_token = file_with_fake_ident.token_at_offset(offset).right_biased().unwrap();
269 let syntax_element = NodeOrToken::Token(fake_ident_token);
270 self.block_expr_parent = has_block_expr_parent(syntax_element.clone());
271 self.unsafe_is_prev = unsafe_is_prev(syntax_element.clone());
272 self.if_is_prev = if_is_prev(syntax_element.clone());
273 self.bind_pat_parent = has_bind_pat_parent(syntax_element.clone());
274 self.ref_pat_parent = has_ref_parent(syntax_element.clone());
275 self.in_loop_body = is_in_loop_body(syntax_element.clone());
276 self.has_trait_parent = has_trait_parent(syntax_element.clone());
277 self.has_impl_parent = has_impl_parent(syntax_element.clone());
278 self.inside_impl_trait_block = inside_impl_trait_block(syntax_element.clone());
279 self.has_field_list_parent = has_field_list_parent(syntax_element.clone());
280 self.impl_as_prev_sibling = has_impl_as_prev_sibling(syntax_element.clone());
281 self.trait_as_prev_sibling = has_trait_as_prev_sibling(syntax_element.clone());
282 self.is_match_arm = is_match_arm(syntax_element.clone());
283 self.has_item_list_or_source_file_parent =
284 has_item_list_or_source_file_parent(syntax_element.clone());
285 self.mod_declaration_under_caret =
286 find_node_at_offset::<ast::Module>(&file_with_fake_ident, offset)
287 .filter(|module| module.item_list().is_none());
288 self.for_is_prev2 = for_is_prev2(syntax_element.clone());
289 self.fn_is_prev = fn_is_prev(syntax_element.clone());
290 self.incomplete_let =
291 syntax_element.ancestors().take(6).find_map(ast::LetStmt::cast).map_or(false, |it| {
292 it.syntax().text_range().end() == syntax_element.text_range().end()
296 fn fill_impl_def(&mut self) {
299 .token_ancestors_with_macros(self.token.clone())
300 .take_while(|it| it.kind() != SOURCE_FILE && it.kind() != MODULE)
301 .find_map(ast::Impl::cast);
304 fn expected_type_and_name(&self) -> (Option<Type>, Option<NameOrNameRef>) {
305 let mut node = match self.token.parent() {
307 None => return (None, None),
312 ast::LetStmt(it) => {
313 cov_mark::hit!(expected_type_let_with_leading_char);
314 cov_mark::hit!(expected_type_let_without_leading_char);
316 .and_then(|pat| self.sema.type_of_pat(&pat))
317 .or_else(|| it.initializer().and_then(|it| self.sema.type_of_expr(&it)));
318 let name = if let Some(ast::Pat::IdentPat(ident)) = it.pat() {
319 ident.name().map(NameOrNameRef::Name)
326 ast::ArgList(_it) => {
327 cov_mark::hit!(expected_type_fn_param_with_leading_char);
328 cov_mark::hit!(expected_type_fn_param_without_leading_char);
329 ActiveParameter::at_token(
333 let name = ap.ident().map(NameOrNameRef::Name);
336 .unwrap_or((None, None))
338 ast::RecordExprFieldList(_it) => {
339 cov_mark::hit!(expected_type_struct_field_without_leading_char);
340 // wouldn't try {} be nice...
342 let record_ty = self.sema.type_of_expr(&ast::Expr::cast(node.parent()?)?)?;
343 let expr_field = self.token.prev_sibling_or_token()?
345 .and_then(|node| ast::RecordExprField::cast(node))?;
346 let field = self.sema.resolve_record_field(&expr_field)?.0;
348 record_ty.field_type(self.db, field),
349 expr_field.field_name().map(NameOrNameRef::NameRef),
351 })().unwrap_or((None, None))
353 ast::RecordExprField(it) => {
354 cov_mark::hit!(expected_type_struct_field_with_leading_char);
356 it.expr().as_ref().and_then(|e| self.sema.type_of_expr(e)),
357 it.field_name().map(NameOrNameRef::NameRef),
360 ast::MatchExpr(it) => {
361 cov_mark::hit!(expected_type_match_arm_without_leading_char);
363 .and_then(|e| self.sema.type_of_expr(&e));
367 cov_mark::hit!(expected_type_if_let_without_leading_char);
368 let ty = it.condition()
369 .and_then(|cond| cond.expr())
370 .and_then(|e| self.sema.type_of_expr(&e));
373 ast::IdentPat(it) => {
374 cov_mark::hit!(expected_type_if_let_with_leading_char);
375 cov_mark::hit!(expected_type_match_arm_with_leading_char);
376 let ty = self.sema.type_of_pat(&ast::Pat::from(it));
380 cov_mark::hit!(expected_type_fn_ret_with_leading_char);
381 cov_mark::hit!(expected_type_fn_ret_without_leading_char);
382 let def = self.sema.to_def(&it);
383 (def.map(|def| def.ret_type(self.db)), None)
385 ast::ClosureExpr(it) => {
386 let ty = self.sema.type_of_expr(&it.into());
387 ty.and_then(|ty| ty.as_callable(self.db))
388 .map(|c| (Some(c.return_type()), None))
389 .unwrap_or((None, None))
391 ast::Stmt(_it) => (None, None),
393 match node.parent() {
398 None => (None, None),
408 original_file: &SyntaxNode,
409 file_with_fake_ident: SyntaxNode,
412 let (expected_type, expected_name) = self.expected_type_and_name();
413 self.expected_type = expected_type;
414 self.expected_name = expected_name;
415 self.attribute_under_caret = find_node_at_offset(&file_with_fake_ident, offset);
417 if let Some(lifetime) = find_node_at_offset::<ast::Lifetime>(&file_with_fake_ident, offset)
419 self.classify_lifetime(original_file, lifetime, offset);
422 // First, let's try to complete a reference to some declaration.
423 if let Some(name_ref) = find_node_at_offset::<ast::NameRef>(&file_with_fake_ident, offset) {
424 // Special case, `trait T { fn foo(i_am_a_name_ref) {} }`.
426 if is_node::<ast::Param>(name_ref.syntax()) {
427 self.is_param = true;
430 // FIXME: remove this (V) duplication and make the check more precise
431 if name_ref.syntax().ancestors().find_map(ast::RecordPatFieldList::cast).is_some() {
432 self.record_pat_syntax =
433 self.sema.find_node_at_offset_with_macros(&original_file, offset);
435 self.classify_name_ref(original_file, name_ref, offset);
438 // Otherwise, see if this is a declaration. We can use heuristics to
439 // suggest declaration names, see `CompletionKind::Magic`.
440 if let Some(name) = find_node_at_offset::<ast::Name>(&file_with_fake_ident, offset) {
441 if let Some(bind_pat) = name.syntax().ancestors().find_map(ast::IdentPat::cast) {
442 self.is_pat_binding_or_const = true;
443 if bind_pat.at_token().is_some()
444 || bind_pat.ref_token().is_some()
445 || bind_pat.mut_token().is_some()
447 self.is_pat_binding_or_const = false;
449 if bind_pat.syntax().parent().and_then(ast::RecordPatFieldList::cast).is_some() {
450 self.is_pat_binding_or_const = false;
452 if let Some(Some(pat)) = bind_pat.syntax().ancestors().find_map(|node| {
455 ast::LetStmt(it) => Some(it.pat()),
456 ast::Param(it) => Some(it.pat()),
461 if pat.syntax().text_range().contains_range(bind_pat.syntax().text_range()) {
462 self.is_pat_binding_or_const = false;
463 self.is_irrefutable_pat_binding = true;
467 self.fill_impl_def();
469 if is_node::<ast::Param>(name.syntax()) {
470 self.is_param = true;
473 // FIXME: remove this (^) duplication and make the check more precise
474 if name.syntax().ancestors().find_map(ast::RecordPatFieldList::cast).is_some() {
475 self.record_pat_syntax =
476 self.sema.find_node_at_offset_with_macros(&original_file, offset);
481 fn classify_lifetime(
483 original_file: &SyntaxNode,
484 lifetime: ast::Lifetime,
487 self.lifetime_syntax =
488 find_node_at_offset(original_file, lifetime.syntax().text_range().start());
489 if let Some(parent) = lifetime.syntax().parent() {
490 if parent.kind() == ERROR {
496 ast::LifetimeParam(_it) => {
497 self.lifetime_allowed = true;
498 self.lifetime_param_syntax =
499 self.sema.find_node_at_offset_with_macros(original_file, offset);
501 ast::BreakExpr(_it) => self.is_label_ref = true,
502 ast::ContinueExpr(_it) => self.is_label_ref = true,
503 ast::Label(_it) => (),
504 _ => self.lifetime_allowed = true,
510 fn classify_name_ref(
512 original_file: &SyntaxNode,
513 name_ref: ast::NameRef,
516 self.name_ref_syntax =
517 find_node_at_offset(original_file, name_ref.syntax().text_range().start());
518 let name_range = name_ref.syntax().text_range();
519 if ast::RecordExprField::for_field_name(&name_ref).is_some() {
520 self.record_lit_syntax =
521 self.sema.find_node_at_offset_with_macros(original_file, offset);
524 self.fill_impl_def();
526 let top_node = name_ref
529 .take_while(|it| it.text_range() == name_range)
533 match top_node.parent().map(|it| it.kind()) {
534 Some(SOURCE_FILE) | Some(ITEM_LIST) => {
535 self.is_new_item = true;
541 self.use_item_syntax =
542 self.sema.token_ancestors_with_macros(self.token.clone()).find_map(ast::Use::cast);
544 self.function_syntax = self
546 .token_ancestors_with_macros(self.token.clone())
547 .take_while(|it| it.kind() != SOURCE_FILE && it.kind() != MODULE)
548 .find_map(ast::Fn::cast);
550 self.record_field_syntax = self
552 .token_ancestors_with_macros(self.token.clone())
554 it.kind() != SOURCE_FILE && it.kind() != MODULE && it.kind() != CALL_EXPR
556 .find_map(ast::RecordExprField::cast);
558 let parent = match name_ref.syntax().parent() {
563 if let Some(segment) = ast::PathSegment::cast(parent.clone()) {
564 let path = segment.parent_path();
568 .and_then(ast::PathExpr::cast)
569 .and_then(|it| it.syntax().parent().and_then(ast::CallExpr::cast))
571 self.is_macro_call = path.syntax().parent().and_then(ast::MacroCall::cast).is_some();
572 self.is_pattern_call =
573 path.syntax().parent().and_then(ast::TupleStructPat::cast).is_some();
575 self.is_path_type = path.syntax().parent().and_then(ast::PathType::cast).is_some();
576 self.has_type_args = segment.generic_arg_list().is_some();
578 if let Some(path) = path_or_use_tree_qualifier(&path) {
579 self.path_qual = path
582 find_node_with_range::<ast::PathSegment>(
584 it.syntax().text_range(),
587 .map(|it| it.parent_path());
591 if let Some(segment) = path.segment() {
592 if segment.coloncolon_token().is_some() {
597 self.is_trivial_path = true;
599 // Find either enclosing expr statement (thing with `;`) or a
600 // block. If block, check that we are the last expr.
601 self.can_be_stmt = name_ref
605 if let Some(stmt) = ast::ExprStmt::cast(node.clone()) {
606 return Some(stmt.syntax().text_range() == name_ref.syntax().text_range());
608 if let Some(block) = ast::BlockExpr::cast(node) {
610 block.tail_expr().map(|e| e.syntax().text_range())
611 == Some(name_ref.syntax().text_range()),
617 self.is_expr = path.syntax().parent().and_then(ast::PathExpr::cast).is_some();
619 if let Some(off) = name_ref.syntax().text_range().start().checked_sub(2.into()) {
620 if let Some(if_expr) =
621 self.sema.find_node_at_offset_with_macros::<ast::IfExpr>(original_file, off)
623 if if_expr.syntax().text_range().end() < name_ref.syntax().text_range().start()
625 self.after_if = true;
630 if let Some(field_expr) = ast::FieldExpr::cast(parent.clone()) {
631 // The receiver comes before the point of insertion of the fake
632 // ident, so it should have the same range in the non-modified file
633 self.dot_receiver = field_expr
635 .map(|e| e.syntax().text_range())
636 .and_then(|r| find_node_with_range(original_file, r));
637 self.dot_receiver_is_ambiguous_float_literal =
638 if let Some(ast::Expr::Literal(l)) = &self.dot_receiver {
640 ast::LiteralKind::FloatNumber { .. } => l.token().text().ends_with('.'),
647 if let Some(method_call_expr) = ast::MethodCallExpr::cast(parent) {
649 self.dot_receiver = method_call_expr
651 .map(|e| e.syntax().text_range())
652 .and_then(|r| find_node_with_range(original_file, r));
658 fn find_node_with_range<N: AstNode>(syntax: &SyntaxNode, range: TextRange) -> Option<N> {
659 syntax.covering_element(range).ancestors().find_map(N::cast)
662 fn is_node<N: AstNode>(node: &SyntaxNode) -> bool {
663 match node.ancestors().find_map(N::cast) {
665 Some(n) => n.syntax().text_range() == node.text_range(),
669 fn path_or_use_tree_qualifier(path: &ast::Path) -> Option<ast::Path> {
670 if let Some(qual) = path.qualifier() {
673 let use_tree_list = path.syntax().ancestors().find_map(ast::UseTreeList::cast)?;
674 let use_tree = use_tree_list.syntax().parent().and_then(ast::UseTree::cast)?;
680 use expect_test::{expect, Expect};
683 use crate::test_utils::{position, TEST_CONFIG};
685 use super::CompletionContext;
687 fn check_expected_type_and_name(ra_fixture: &str, expect: Expect) {
688 let (db, pos) = position(ra_fixture);
689 let completion_context = CompletionContext::new(&db, pos, &TEST_CONFIG).unwrap();
691 let ty = completion_context
693 .map(|t| t.display_test(&db).to_string())
694 .unwrap_or("?".to_owned());
696 let name = completion_context
698 .map_or_else(|| "?".to_owned(), |name| name.to_string());
700 expect.assert_eq(&format!("ty: {}, name: {}", ty, name));
704 fn expected_type_let_without_leading_char() {
705 cov_mark::check!(expected_type_let_without_leading_char);
706 check_expected_type_and_name(
712 expect![[r#"ty: u32, name: x"#]],
717 fn expected_type_let_with_leading_char() {
718 cov_mark::check!(expected_type_let_with_leading_char);
719 check_expected_type_and_name(
725 expect![[r#"ty: u32, name: x"#]],
730 fn expected_type_let_pat() {
731 check_expected_type_and_name(
737 expect![[r#"ty: u32, name: ?"#]],
739 check_expected_type_and_name(
745 expect![[r#"ty: u32, name: ?"#]],
750 fn expected_type_fn_param_without_leading_char() {
751 cov_mark::check!(expected_type_fn_param_without_leading_char);
752 check_expected_type_and_name(
760 expect![[r#"ty: u32, name: x"#]],
765 fn expected_type_fn_param_with_leading_char() {
766 cov_mark::check!(expected_type_fn_param_with_leading_char);
767 check_expected_type_and_name(
775 expect![[r#"ty: u32, name: x"#]],
780 fn expected_type_struct_field_without_leading_char() {
781 cov_mark::check!(expected_type_struct_field_without_leading_char);
782 check_expected_type_and_name(
784 struct Foo { a: u32 }
789 expect![[r#"ty: u32, name: a"#]],
794 fn expected_type_generic_struct_field() {
795 check_expected_type_and_name(
797 struct Foo<T> { a: T }
798 fn foo() -> Foo<u32> {
802 expect![[r#"ty: u32, name: a"#]],
807 fn expected_type_struct_field_with_leading_char() {
808 cov_mark::check!(expected_type_struct_field_with_leading_char);
809 check_expected_type_and_name(
811 struct Foo { a: u32 }
816 expect![[r#"ty: u32, name: a"#]],
821 fn expected_type_match_arm_without_leading_char() {
822 cov_mark::check!(expected_type_match_arm_without_leading_char);
823 check_expected_type_and_name(
830 expect![[r#"ty: E, name: ?"#]],
835 fn expected_type_match_arm_with_leading_char() {
836 cov_mark::check!(expected_type_match_arm_with_leading_char);
837 check_expected_type_and_name(
844 expect![[r#"ty: E, name: ?"#]],
849 fn expected_type_if_let_without_leading_char() {
850 cov_mark::check!(expected_type_if_let_without_leading_char);
851 check_expected_type_and_name(
853 enum Foo { Bar, Baz, Quux }
860 expect![[r#"ty: Foo, name: ?"#]],
865 fn expected_type_if_let_with_leading_char() {
866 cov_mark::check!(expected_type_if_let_with_leading_char);
867 check_expected_type_and_name(
869 enum Foo { Bar, Baz, Quux }
876 expect![[r#"ty: Foo, name: ?"#]],
881 fn expected_type_fn_ret_without_leading_char() {
882 cov_mark::check!(expected_type_fn_ret_without_leading_char);
883 check_expected_type_and_name(
889 expect![[r#"ty: u32, name: ?"#]],
894 fn expected_type_fn_ret_with_leading_char() {
895 cov_mark::check!(expected_type_fn_ret_with_leading_char);
896 check_expected_type_and_name(
902 expect![[r#"ty: u32, name: ?"#]],
907 fn expected_type_fn_ret_fn_ref_fully_typed() {
908 check_expected_type_and_name(
914 expect![[r#"ty: u32, name: ?"#]],
919 fn expected_type_closure_param_return() {
920 // FIXME: make this work with `|| $0`
921 check_expected_type_and_name(
927 fn bar(f: impl FnOnce() -> u32) {}
929 trait FnOnce { type Output; }
931 expect![[r#"ty: u32, name: ?"#]],
936 fn expected_type_generic_function() {
937 check_expected_type_and_name(
945 expect![[r#"ty: u32, name: t"#]],
950 fn expected_type_generic_method() {
951 check_expected_type_and_name(
959 fn bar(self, t: T) {}
962 expect![[r#"ty: u32, name: t"#]],