| use expect_test::expect; |
| |
| use super::{check_infer, check_no_mismatches, check_types}; |
| |
| #[test] |
| fn bug_484() { |
| check_infer( |
| r#" |
| fn test() { |
| let x = if true {}; |
| } |
| "#, |
| expect![[r#" |
| 10..37 '{ ... {}; }': () |
| 20..21 'x': () |
| 24..34 'if true {}': () |
| 27..31 'true': bool |
| 32..34 '{}': () |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn no_panic_on_field_of_enum() { |
| check_infer( |
| r#" |
| enum X {} |
| |
| fn test(x: X) { |
| x.some_field; |
| } |
| "#, |
| expect![[r#" |
| 19..20 'x': X |
| 25..46 '{ ...eld; }': () |
| 31..32 'x': X |
| 31..43 'x.some_field': {unknown} |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn bug_585() { |
| check_infer( |
| r#" |
| fn test() { |
| X {}; |
| match x { |
| A::B {} => (), |
| A::Y() => (), |
| } |
| } |
| "#, |
| expect![[r#" |
| 10..88 '{ ... } }': () |
| 16..20 'X {}': {unknown} |
| 26..86 'match ... }': () |
| 32..33 'x': {unknown} |
| 44..51 'A::B {}': {unknown} |
| 55..57 '()': () |
| 67..73 'A::Y()': {unknown} |
| 77..79 '()': () |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn bug_651() { |
| check_infer( |
| r#" |
| fn quux() { |
| let y = 92; |
| 1 + y; |
| } |
| "#, |
| expect![[r#" |
| 10..40 '{ ...+ y; }': () |
| 20..21 'y': i32 |
| 24..26 '92': i32 |
| 32..33 '1': i32 |
| 32..37 '1 + y': i32 |
| 36..37 'y': i32 |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn recursive_vars() { |
| check_infer( |
| r#" |
| fn test() { |
| let y = unknown; |
| [y, &y]; |
| } |
| "#, |
| expect![[r#" |
| 10..47 '{ ...&y]; }': () |
| 20..21 'y': {unknown} |
| 24..31 'unknown': {unknown} |
| 37..44 '[y, &y]': [{unknown}; 2] |
| 38..39 'y': {unknown} |
| 41..43 '&y': &'? {unknown} |
| 42..43 'y': {unknown} |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn recursive_vars_2() { |
| check_infer( |
| r#" |
| fn test() { |
| let x = unknown; |
| let y = unknown; |
| [(x, y), (&y, &x)]; |
| } |
| "#, |
| expect![[r#" |
| 10..79 '{ ...x)]; }': () |
| 20..21 'x': &'? {unknown} |
| 24..31 'unknown': &'? {unknown} |
| 41..42 'y': {unknown} |
| 45..52 'unknown': {unknown} |
| 58..76 '[(x, y..., &x)]': [(&'? {unknown}, {unknown}); 2] |
| 59..65 '(x, y)': (&'? {unknown}, {unknown}) |
| 60..61 'x': &'? {unknown} |
| 63..64 'y': {unknown} |
| 67..75 '(&y, &x)': (&'? {unknown}, {unknown}) |
| 68..70 '&y': &'? {unknown} |
| 69..70 'y': {unknown} |
| 72..74 '&x': &'? &'? {unknown} |
| 73..74 'x': &'? {unknown} |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn array_elements_expected_type() { |
| check_no_mismatches( |
| r#" |
| fn test() { |
| let x: [[u32; 2]; 2] = [[1, 2], [3, 4]]; |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn infer_std_crash_1() { |
| // caused stack overflow, taken from std |
| check_infer( |
| r#" |
| enum Maybe<T> { |
| Real(T), |
| Fake, |
| } |
| |
| fn write() { |
| match something_unknown { |
| Maybe::Real(ref mut something) => (), |
| } |
| } |
| "#, |
| expect![[r#" |
| 53..138 '{ ... } }': () |
| 59..136 'match ... }': () |
| 65..82 'someth...nknown': Maybe<{unknown}> |
| 93..123 'Maybe:...thing)': Maybe<{unknown}> |
| 105..122 'ref mu...ething': &'? mut {unknown} |
| 127..129 '()': () |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn infer_std_crash_2() { |
| // caused "equating two type variables, ...", taken from std |
| check_infer( |
| r#" |
| fn test_line_buffer() { |
| &[0, b'\n', 1, b'\n']; |
| } |
| "#, |
| expect![[r#" |
| 22..52 '{ ...n']; }': () |
| 28..49 '&[0, b...b'\n']': &'? [u8; 4] |
| 29..49 '[0, b'...b'\n']': [u8; 4] |
| 30..31 '0': u8 |
| 33..38 'b'\n'': u8 |
| 40..41 '1': u8 |
| 43..48 'b'\n'': u8 |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn infer_std_crash_3() { |
| // taken from rustc |
| check_infer( |
| r#" |
| pub fn compute() { |
| match nope!() { |
| SizeSkeleton::Pointer { non_zero: true, tail } => {} |
| } |
| } |
| "#, |
| expect![[r#" |
| 17..107 '{ ... } }': () |
| 23..105 'match ... }': () |
| 29..36 'nope!()': {unknown} |
| 47..93 'SizeSk...tail }': {unknown} |
| 81..85 'true': bool |
| 81..85 'true': bool |
| 87..91 'tail': {unknown} |
| 97..99 '{}': () |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn infer_std_crash_4() { |
| // taken from rustc |
| check_infer( |
| r#" |
| pub fn primitive_type() { |
| match *self { |
| BorrowedRef { type_: Primitive(p), ..} => {}, |
| } |
| } |
| "#, |
| expect![[r#" |
| 24..105 '{ ... } }': () |
| 30..103 'match ... }': () |
| 36..41 '*self': {unknown} |
| 37..41 'self': {unknown} |
| 52..90 'Borrow...), ..}': {unknown} |
| 73..85 'Primitive(p)': {unknown} |
| 83..84 'p': {unknown} |
| 94..96 '{}': () |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn infer_std_crash_5() { |
| // taken from rustc |
| check_infer( |
| r#" |
| //- minicore: iterator |
| fn extra_compiler_flags() { |
| for content in doesnt_matter { |
| let name = if doesnt_matter { |
| first |
| } else { |
| &content |
| }; |
| |
| let content = if ICE_REPORT_COMPILER_FLAGS_STRIP_VALUE.contains(&name) { |
| name |
| } else { |
| content |
| }; |
| } |
| } |
| "#, |
| expect![[r#" |
| 26..322 '{ ... } }': () |
| 32..320 'for co... }': fn into_iter<{unknown}>({unknown}) -> <{unknown} as IntoIterator>::IntoIter |
| 32..320 'for co... }': {unknown} |
| 32..320 'for co... }': ! |
| 32..320 'for co... }': {unknown} |
| 32..320 'for co... }': &'? mut {unknown} |
| 32..320 'for co... }': fn next<{unknown}>(&'? mut {unknown}) -> Option<<{unknown} as Iterator>::Item> |
| 32..320 'for co... }': Option<{unknown}> |
| 32..320 'for co... }': () |
| 32..320 'for co... }': () |
| 32..320 'for co... }': () |
| 32..320 'for co... }': () |
| 36..43 'content': {unknown} |
| 47..60 'doesnt_matter': {unknown} |
| 61..320 '{ ... }': () |
| 75..79 'name': &'? {unknown} |
| 82..166 'if doe... }': &'? {unknown} |
| 85..98 'doesnt_matter': bool |
| 99..128 '{ ... }': &'? {unknown} |
| 113..118 'first': &'? {unknown} |
| 134..166 '{ ... }': &'? {unknown} |
| 148..156 '&content': &'? {unknown} |
| 149..156 'content': {unknown} |
| 181..188 'content': &'? {unknown} |
| 191..313 'if ICE... }': &'? {unknown} |
| 194..231 'ICE_RE..._VALUE': {unknown} |
| 194..247 'ICE_RE...&name)': bool |
| 241..246 '&name': &'? &'? {unknown} |
| 242..246 'name': &'? {unknown} |
| 248..276 '{ ... }': &'? {unknown} |
| 262..266 'name': &'? {unknown} |
| 282..313 '{ ... }': {unknown} |
| 296..303 'content': {unknown} |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn infer_nested_generics_crash() { |
| // another crash found typechecking rustc |
| check_infer( |
| r#" |
| struct Canonical<V> { |
| value: V, |
| } |
| struct QueryResponse<V> { |
| value: V, |
| } |
| fn test<R>(query_response: Canonical<QueryResponse<R>>) { |
| &query_response.value; |
| } |
| "#, |
| expect![[r#" |
| 91..105 'query_response': Canonical<QueryResponse<R>> |
| 136..166 '{ ...lue; }': () |
| 142..163 '&query....value': &'? QueryResponse<R> |
| 143..157 'query_response': Canonical<QueryResponse<R>> |
| 143..163 'query_....value': QueryResponse<R> |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn infer_paren_macro_call() { |
| check_infer( |
| r#" |
| macro_rules! bar { () => {0u32} } |
| fn test() { |
| let a = (bar!()); |
| } |
| "#, |
| expect![[r#" |
| !0..4 '0u32': u32 |
| 44..69 '{ ...()); }': () |
| 54..55 'a': u32 |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn infer_array_macro_call() { |
| check_infer( |
| r#" |
| macro_rules! bar { () => {0u32} } |
| fn test() { |
| let a = [bar!()]; |
| } |
| "#, |
| expect![[r#" |
| !0..4 '0u32': u32 |
| 44..69 '{ ...()]; }': () |
| 54..55 'a': [u32; 1] |
| 58..66 '[bar!()]': [u32; 1] |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn bug_1030() { |
| check_infer( |
| r#" |
| struct HashSet<T, H>; |
| struct FxHasher; |
| type FxHashSet<T> = HashSet<T, FxHasher>; |
| |
| impl<T, H> HashSet<T, H> { |
| fn default() -> HashSet<T, H> {} |
| } |
| |
| pub fn main_loop() { |
| FxHashSet::default(); |
| } |
| "#, |
| expect![[r#" |
| 143..145 '{}': HashSet<T, H> |
| 168..197 '{ ...t(); }': () |
| 174..192 'FxHash...efault': fn default<{unknown}, FxHasher>() -> HashSet<{unknown}, FxHasher> |
| 174..194 'FxHash...ault()': HashSet<{unknown}, FxHasher> |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_2669() { |
| check_infer( |
| r#" |
| trait A {} |
| trait Write {} |
| struct Response<T> {} |
| |
| trait D { |
| fn foo(); |
| } |
| |
| impl<T:A> D for Response<T> { |
| fn foo() { |
| end(); |
| fn end<W: Write>() { |
| let _x: T = loop {}; |
| } |
| } |
| } |
| "#, |
| expect![[r#" |
| 119..214 '{ ... }': () |
| 129..132 'end': fn end<{unknown}>() |
| 129..134 'end()': () |
| 163..208 '{ ... }': () |
| 181..183 '_x': ! |
| 190..197 'loop {}': ! |
| 195..197 '{}': () |
| "#]], |
| ) |
| } |
| |
| #[test] |
| fn issue_2705() { |
| check_infer( |
| r#" |
| trait Trait {} |
| fn test() { |
| <Trait<u32>>::foo() |
| } |
| "#, |
| expect![[r#" |
| 25..52 '{ ...oo() }': () |
| 31..48 '<Trait...>::foo': {unknown} |
| 31..50 '<Trait...:foo()': () |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_2683_chars_impl() { |
| check_types( |
| r#" |
| //- minicore: iterator |
| pub struct Chars<'a> {} |
| impl<'a> Iterator for Chars<'a> { |
| type Item = char; |
| fn next(&mut self) -> Option<char> { loop {} } |
| } |
| |
| fn test() { |
| let chars: Chars<'_>; |
| (chars.next(), chars.nth(1)); |
| } //^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (Option<char>, Option<char>) |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn issue_3999_slice() { |
| check_infer( |
| r#" |
| fn foo(params: &[usize]) { |
| match params { |
| [ps @ .., _] => {} |
| } |
| } |
| "#, |
| expect![[r#" |
| 7..13 'params': &'? [usize] |
| 25..80 '{ ... } }': () |
| 31..78 'match ... }': () |
| 37..43 'params': &'? [usize] |
| 54..66 '[ps @ .., _]': [usize] |
| 55..62 'ps @ ..': &'? [usize] |
| 60..62 '..': [usize] |
| 64..65 '_': usize |
| 70..72 '{}': () |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_3999_struct() { |
| // rust-analyzer should not panic on seeing this malformed |
| // record pattern. |
| check_infer( |
| r#" |
| struct Bar { |
| a: bool, |
| } |
| fn foo(b: Bar) { |
| match b { |
| Bar { a: .. } => {}, |
| } |
| } |
| "#, |
| expect![[r#" |
| 35..36 'b': Bar |
| 43..95 '{ ... } }': () |
| 49..93 'match ... }': () |
| 55..56 'b': Bar |
| 67..80 'Bar { a: .. }': Bar |
| 76..78 '..': bool |
| 84..86 '{}': () |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_4235_name_conflicts() { |
| check_infer( |
| r#" |
| struct FOO {} |
| static FOO:FOO = FOO {}; |
| |
| impl FOO { |
| fn foo(&self) {} |
| } |
| |
| fn main() { |
| let a = &FOO; |
| a.foo(); |
| } |
| "#, |
| expect![[r#" |
| 31..37 'FOO {}': FOO |
| 63..67 'self': &'? FOO |
| 69..71 '{}': () |
| 85..119 '{ ...o(); }': () |
| 95..96 'a': &'? FOO |
| 99..103 '&FOO': &'? FOO |
| 100..103 'FOO': FOO |
| 109..110 'a': &'? FOO |
| 109..116 'a.foo()': () |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_4465_dollar_crate_at_type() { |
| check_infer( |
| r#" |
| pub struct Foo {} |
| pub fn anything<T>() -> T { |
| loop {} |
| } |
| macro_rules! foo { |
| () => {{ |
| let r: $crate::Foo = anything(); |
| r |
| }}; |
| } |
| fn main() { |
| let _a = foo!(); |
| } |
| "#, |
| expect![[r#" |
| 44..59 '{ loop {} }': T |
| 50..57 'loop {}': ! |
| 55..57 '{}': () |
| !0..31 '{letr:...g();r}': Foo |
| !4..5 'r': Foo |
| !18..26 'anything': fn anything<Foo>() -> Foo |
| !18..28 'anything()': Foo |
| !29..30 'r': Foo |
| 163..187 '{ ...!(); }': () |
| 173..175 '_a': Foo |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_6811() { |
| check_infer( |
| r#" |
| macro_rules! profile_function { |
| () => { |
| let _a = 1; |
| let _b = 1; |
| }; |
| } |
| fn main() { |
| profile_function!(); |
| } |
| "#, |
| expect![[r#" |
| !3..5 '_a': i32 |
| !6..7 '1': i32 |
| !11..13 '_b': i32 |
| !14..15 '1': i32 |
| 103..131 '{ ...!(); }': () |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_4053_diesel_where_clauses() { |
| check_infer( |
| r#" |
| trait BoxedDsl<DB> { |
| type Output; |
| fn internal_into_boxed(self) -> Self::Output; |
| } |
| |
| struct SelectStatement<From, Select, Distinct, Where, Order, LimitOffset, GroupBy, Locking> { |
| order: Order, |
| } |
| |
| trait QueryFragment<DB: Backend> {} |
| |
| trait Into<T> { fn into(self) -> T; } |
| |
| impl<F, S, D, W, O, LOf, DB> BoxedDsl<DB> |
| for SelectStatement<F, S, D, W, O, LOf, G> |
| where |
| O: Into<dyn QueryFragment<DB>>, |
| { |
| type Output = XXX; |
| |
| fn internal_into_boxed(self) -> Self::Output { |
| self.order.into(); |
| } |
| } |
| "#, |
| expect![[r#" |
| 65..69 'self': Self |
| 267..271 'self': Self |
| 466..470 'self': SelectStatement<F, S, D, W, O, LOf, {unknown}, {unknown}> |
| 488..522 '{ ... }': () |
| 498..502 'self': SelectStatement<F, S, D, W, O, LOf, {unknown}, {unknown}> |
| 498..508 'self.order': O |
| 498..515 'self.o...into()': dyn QueryFragment<DB> + '? |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_4953() { |
| check_infer( |
| r#" |
| pub struct Foo(pub i64); |
| impl Foo { |
| fn test() -> Self { Self(0i64) } |
| } |
| "#, |
| expect![[r#" |
| 58..72 '{ Self(0i64) }': Foo |
| 60..64 'Self': fn Foo(i64) -> Foo |
| 60..70 'Self(0i64)': Foo |
| 65..69 '0i64': i64 |
| "#]], |
| ); |
| check_infer( |
| r#" |
| pub struct Foo<T>(pub T); |
| impl Foo<i64> { |
| fn test() -> Self { Self(0i64) } |
| } |
| "#, |
| expect![[r#" |
| 64..78 '{ Self(0i64) }': Foo<i64> |
| 66..70 'Self': fn Foo<i64>(i64) -> Foo<i64> |
| 66..76 'Self(0i64)': Foo<i64> |
| 71..75 '0i64': i64 |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_4931() { |
| check_infer( |
| r#" |
| trait Div<T> { |
| type Output; |
| } |
| |
| trait CheckedDiv: Div<()> {} |
| |
| trait PrimInt: CheckedDiv<Output = ()> { |
| fn pow(self); |
| } |
| |
| fn check<T: PrimInt>(i: T) { |
| i.pow(); |
| } |
| "#, |
| expect![[r#" |
| 117..121 'self': Self |
| 148..149 'i': T |
| 154..170 '{ ...w(); }': () |
| 160..161 'i': T |
| 160..167 'i.pow()': () |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_4885() { |
| check_infer( |
| r#" |
| //- minicore: coerce_unsized, future |
| use core::future::Future; |
| trait Foo<R> { |
| type Bar; |
| } |
| fn foo<R, K>(key: &K) -> impl Future<Output = K::Bar> |
| where |
| K: Foo<R>, |
| { |
| bar(key) |
| } |
| fn bar<R, K>(key: &K) -> impl Future<Output = K::Bar> |
| where |
| K: Foo<R>, |
| { |
| } |
| "#, |
| expect![[r#" |
| 70..73 'key': &'? K |
| 132..148 '{ ...key) }': impl Future<Output = <K as Foo<R>>::Bar> |
| 138..141 'bar': fn bar<R, K>(&'? K) -> impl Future<Output = <K as Foo<R>>::Bar> |
| 138..146 'bar(key)': impl Future<Output = <K as Foo<R>>::Bar> |
| 142..145 'key': &'? K |
| 162..165 'key': &'? K |
| 224..227 '{ }': () |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_4800() { |
| check_infer( |
| r#" |
| trait Debug {} |
| |
| struct Foo<T>; |
| |
| type E1<T> = (T, T, T); |
| type E2<T> = E1<E1<E1<(T, T, T)>>>; |
| |
| impl Debug for Foo<E2<()>> {} |
| |
| struct Request; |
| |
| pub trait Future { |
| type Output; |
| } |
| |
| pub struct PeerSet<D>; |
| |
| impl<D> Service<Request> for PeerSet<D> |
| where |
| D: Discover, |
| D::Key: Debug, |
| { |
| type Error = (); |
| type Future = dyn Future<Output = Self::Error>; |
| |
| fn call(&mut self) -> Self::Future { |
| loop {} |
| } |
| } |
| |
| pub trait Discover { |
| type Key; |
| } |
| |
| pub trait Service<Request> { |
| type Error; |
| type Future: Future<Output = Self::Error>; |
| fn call(&mut self) -> Self::Future; |
| } |
| "#, |
| expect![[r#" |
| 379..383 'self': &'? mut PeerSet<D> |
| 401..424 '{ ... }': dyn Future<Output = ()> + '? |
| 411..418 'loop {}': ! |
| 416..418 '{}': () |
| 575..579 'self': &'? mut Self |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_4966() { |
| check_infer( |
| r#" |
| //- minicore: deref |
| pub trait IntoIterator { |
| type Item; |
| } |
| |
| struct Repeat<A> { element: A } |
| |
| struct Map<F> { f: F } |
| |
| struct Vec<T> {} |
| |
| impl<T> core::ops::Deref for Vec<T> { |
| type Target = [T]; |
| } |
| |
| fn from_iter<A, T: IntoIterator<Item = A>>(iter: T) -> Vec<A> {} |
| |
| fn main() { |
| let inner = Map { f: |_: &f64| 0.0 }; |
| |
| let repeat = Repeat { element: inner }; |
| |
| let vec = from_iter(repeat); |
| |
| vec.foo_bar(); |
| } |
| "#, |
| expect![[r#" |
| 225..229 'iter': T |
| 244..246 '{}': Vec<A> |
| 258..402 '{ ...r(); }': () |
| 268..273 'inner': Map<impl Fn(&'? f64) -> f64> |
| 276..300 'Map { ... 0.0 }': Map<impl Fn(&'? f64) -> f64> |
| 285..298 '|_: &f64| 0.0': impl Fn(&'? f64) -> f64 |
| 286..287 '_': &'? f64 |
| 295..298 '0.0': f64 |
| 311..317 'repeat': Repeat<Map<impl Fn(&'? f64) -> f64>> |
| 320..345 'Repeat...nner }': Repeat<Map<impl Fn(&'? f64) -> f64>> |
| 338..343 'inner': Map<impl Fn(&'? f64) -> f64> |
| 356..359 'vec': Vec<IntoIterator::Item<Repeat<Map<impl Fn(&'? f64) -> f64>>>> |
| 362..371 'from_iter': fn from_iter<IntoIterator::Item<Repeat<Map<impl Fn(&'? f64) -> f64>>>, Repeat<Map<impl Fn(&'? f64) -> f64>>>(Repeat<Map<impl Fn(&'? f64) -> f64>>) -> Vec<IntoIterator::Item<Repeat<Map<impl Fn(&'? f64) -> f64>>>> |
| 362..379 'from_i...epeat)': Vec<IntoIterator::Item<Repeat<Map<impl Fn(&'? f64) -> f64>>>> |
| 372..378 'repeat': Repeat<Map<impl Fn(&'? f64) -> f64>> |
| 386..389 'vec': Vec<IntoIterator::Item<Repeat<Map<impl Fn(&'? f64) -> f64>>>> |
| 386..399 'vec.foo_bar()': {unknown} |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_6628() { |
| check_infer( |
| r#" |
| //- minicore: fn |
| struct S<T>(); |
| impl<T> S<T> { |
| fn f(&self, _t: T) {} |
| fn g<F: FnOnce(&T)>(&self, _f: F) {} |
| } |
| fn main() { |
| let s = S(); |
| s.g(|_x| {}); |
| s.f(10); |
| } |
| "#, |
| expect![[r#" |
| 40..44 'self': &'? S<T> |
| 46..48 '_t': T |
| 53..55 '{}': () |
| 81..85 'self': &'? S<T> |
| 87..89 '_f': F |
| 94..96 '{}': () |
| 109..160 '{ ...10); }': () |
| 119..120 's': S<i32> |
| 123..124 'S': fn S<i32>() -> S<i32> |
| 123..126 'S()': S<i32> |
| 132..133 's': S<i32> |
| 132..144 's.g(|_x| {})': () |
| 136..143 '|_x| {}': impl FnOnce(&'? i32) |
| 137..139 '_x': &'? i32 |
| 141..143 '{}': () |
| 150..151 's': S<i32> |
| 150..157 's.f(10)': () |
| 154..156 '10': i32 |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_6852() { |
| check_infer( |
| r#" |
| //- minicore: deref |
| use core::ops::Deref; |
| |
| struct BufWriter {} |
| |
| struct Mutex<T> {} |
| struct MutexGuard<'a, T> {} |
| impl<T> Mutex<T> { |
| fn lock(&self) -> MutexGuard<'_, T> {} |
| } |
| impl<'a, T: 'a> Deref for MutexGuard<'a, T> { |
| type Target = T; |
| } |
| fn flush(&self) { |
| let w: &Mutex<BufWriter>; |
| *(w.lock()); |
| } |
| "#, |
| expect![[r#" |
| 123..127 'self': &'? Mutex<T> |
| 150..152 '{}': MutexGuard<'?, T> |
| 234..238 'self': &'? {unknown} |
| 240..290 '{ ...()); }': () |
| 250..251 'w': &'? Mutex<BufWriter> |
| 276..287 '*(w.lock())': BufWriter |
| 278..279 'w': &'? Mutex<BufWriter> |
| 278..286 'w.lock()': MutexGuard<'?, BufWriter> |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn param_overrides_fn() { |
| check_types( |
| r#" |
| fn example(example: i32) { |
| fn f() {} |
| example; |
| //^^^^^^^ i32 |
| } |
| "#, |
| ) |
| } |
| |
| #[test] |
| fn lifetime_from_chalk_during_deref() { |
| check_types( |
| r#" |
| //- minicore: deref |
| struct Box<T: ?Sized> {} |
| impl<T: ?Sized> core::ops::Deref for Box<T> { |
| type Target = T; |
| |
| fn deref(&self) -> &Self::Target { |
| loop {} |
| } |
| } |
| |
| trait Iterator { |
| type Item; |
| } |
| |
| pub struct Iter<'a, T: 'a> { |
| inner: Box<dyn IterTrait<'a, T, Item = &'a T> + 'a>, |
| } |
| |
| trait IterTrait<'a, T: 'a>: Iterator<Item = &'a T> { |
| fn clone_box(&self); |
| } |
| |
| fn clone_iter<T>(s: Iter<T>) { |
| s.inner.clone_box(); |
| //^^^^^^^^^^^^^^^^^^^ () |
| } |
| "#, |
| ) |
| } |
| |
| #[test] |
| fn issue_8686() { |
| check_infer( |
| r#" |
| pub trait Try: FromResidual { |
| type Output; |
| type Residual; |
| } |
| pub trait FromResidual<R = <Self as Try>::Residual> { |
| fn from_residual(residual: R) -> Self; |
| } |
| |
| struct ControlFlow<B, C>; |
| impl<B, C> Try for ControlFlow<B, C> { |
| type Output = C; |
| type Residual = ControlFlow<B, !>; |
| } |
| impl<B, C> FromResidual for ControlFlow<B, C> { |
| fn from_residual(r: ControlFlow<B, !>) -> Self { ControlFlow } |
| } |
| |
| fn test() { |
| ControlFlow::from_residual(ControlFlow::<u32, !>); |
| } |
| "#, |
| expect![[r#" |
| 144..152 'residual': R |
| 365..366 'r': ControlFlow<B, !> |
| 395..410 '{ ControlFlow }': ControlFlow<B, C> |
| 397..408 'ControlFlow': ControlFlow<B, C> |
| 424..482 '{ ...!>); }': () |
| 430..456 'Contro...sidual': fn from_residual<ControlFlow<u32, {unknown}>, ControlFlow<u32, !>>(ControlFlow<u32, !>) -> ControlFlow<u32, {unknown}> |
| 430..479 'Contro...2, !>)': ControlFlow<u32, {unknown}> |
| 457..478 'Contro...32, !>': ControlFlow<u32, !> |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn cfg_tail() { |
| // https://github.com/rust-lang/rust-analyzer/issues/8378 |
| check_infer( |
| r#" |
| fn fake_tail(){ |
| { "first" } |
| #[cfg(never)] 9 |
| } |
| fn multiple_fake(){ |
| { "fake" } |
| { "fake" } |
| { "second" } |
| #[cfg(never)] { 11 } |
| #[cfg(never)] 12; |
| #[cfg(never)] 13 |
| } |
| fn no_normal_tail(){ |
| { "third" } |
| #[cfg(never)] 14; |
| #[cfg(never)] 15; |
| } |
| fn no_actual_tail(){ |
| { "fourth" }; |
| #[cfg(never)] 14; |
| #[cfg(never)] 15 |
| } |
| "#, |
| expect![[r#" |
| 14..53 '{ ...)] 9 }': () |
| 20..31 '{ "first" }': () |
| 22..29 '"first"': &'static str |
| 72..190 '{ ...] 13 }': () |
| 78..88 '{ "fake" }': () |
| 80..86 '"fake"': &'static str |
| 93..103 '{ "fake" }': () |
| 95..101 '"fake"': &'static str |
| 108..120 '{ "second" }': () |
| 110..118 '"second"': &'static str |
| 210..273 '{ ... 15; }': () |
| 216..227 '{ "third" }': () |
| 218..225 '"third"': &'static str |
| 293..357 '{ ...] 15 }': () |
| 299..311 '{ "fourth" }': &'static str |
| 301..309 '"fourth"': &'static str |
| "#]], |
| ) |
| } |
| |
| #[test] |
| fn impl_trait_in_option_9530() { |
| check_types( |
| r#" |
| //- minicore: sized |
| struct Option<T>; |
| impl<T> Option<T> { |
| fn unwrap(self) -> T { loop {} } |
| } |
| fn make() -> Option<impl Copy> { Option } |
| trait Copy {} |
| fn test() { |
| let o = make(); |
| o.unwrap(); |
| //^^^^^^^^^^ impl Copy |
| } |
| "#, |
| ) |
| } |
| |
| #[test] |
| fn bare_dyn_trait_binders_9639() { |
| check_no_mismatches( |
| r#" |
| //- minicore: fn, coerce_unsized, dispatch_from_dyn |
| fn infix_parse<T, S>(_state: S, _level_code: &Fn(S)) -> T { |
| loop {} |
| } |
| |
| fn parse_a_rule() { |
| infix_parse((), &(|_recurse| ())) |
| } |
| "#, |
| ) |
| } |
| |
| #[test] |
| fn nested_closure() { |
| check_types( |
| r#" |
| //- minicore: fn, option |
| |
| fn map<T, U>(o: Option<T>, f: impl FnOnce(T) -> U) -> Option<U> { loop {} } |
| |
| fn test() { |
| let o = Some(Some(2)); |
| map(o, |s| map(s, |x| x)); |
| // ^ i32 |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn call_expected_type_closure() { |
| check_types( |
| r#" |
| //- minicore: fn, option |
| |
| fn map<T, U>(o: Option<T>, f: impl FnOnce(T) -> U) -> Option<U> { loop {} } |
| struct S { |
| field: u32 |
| } |
| |
| fn test() { |
| let o = Some(S { field: 2 }); |
| let _: Option<()> = map(o, |s| { s.field; }); |
| // ^^^^^^^ u32 |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn coerce_diesel_panic() { |
| check_no_mismatches( |
| r#" |
| //- minicore: option |
| |
| trait TypeMetadata { |
| type MetadataLookup; |
| } |
| |
| pub struct Output<'a, T, DB> |
| where |
| DB: TypeMetadata, |
| DB::MetadataLookup: 'a, |
| { |
| out: T, |
| metadata_lookup: Option<&'a DB::MetadataLookup>, |
| } |
| |
| impl<'a, T, DB: TypeMetadata> Output<'a, T, DB> { |
| pub fn new(out: T, metadata_lookup: &'a DB::MetadataLookup) -> Self { |
| Output { |
| out, |
| metadata_lookup: Some(metadata_lookup), |
| } |
| } |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn bitslice_panic() { |
| check_no_mismatches( |
| r#" |
| //- minicore: option, deref |
| |
| pub trait BitView { |
| type Store; |
| } |
| |
| pub struct Lsb0; |
| |
| pub struct BitArray<V: BitView> { } |
| |
| pub struct BitSlice<T> { } |
| |
| impl<V: BitView> core::ops::Deref for BitArray<V> { |
| type Target = BitSlice<V::Store>; |
| } |
| |
| impl<T> BitSlice<T> { |
| pub fn split_first(&self) -> Option<(T, &Self)> { loop {} } |
| } |
| |
| fn multiexp_inner() { |
| let exp: &BitArray<Foo>; |
| exp.split_first(); |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn macro_expands_to_impl_trait() { |
| check_no_mismatches( |
| r#" |
| trait Foo {} |
| |
| macro_rules! ty { |
| () => { |
| impl Foo |
| } |
| } |
| |
| fn foo(_: ty!()) {} |
| |
| fn bar() { |
| foo(()); |
| } |
| "#, |
| ) |
| } |
| |
| #[test] |
| fn nested_macro_in_fn_params() { |
| check_no_mismatches( |
| r#" |
| macro_rules! U32Inner { |
| () => { |
| u32 |
| }; |
| } |
| |
| macro_rules! U32 { |
| () => { |
| U32Inner!() |
| }; |
| } |
| |
| fn mamba(a: U32!(), p: u32) -> u32 { |
| a |
| } |
| "#, |
| ) |
| } |
| |
| #[test] |
| fn for_loop_block_expr_iterable() { |
| check_infer( |
| r#" |
| //- minicore: iterator |
| fn test() { |
| for _ in { let x = 0; } { |
| let y = 0; |
| } |
| } |
| "#, |
| expect![[r#" |
| 10..68 '{ ... } }': () |
| 16..66 'for _ ... }': fn into_iter<()>(()) -> <() as IntoIterator>::IntoIter |
| 16..66 'for _ ... }': IntoIterator::IntoIter<()> |
| 16..66 'for _ ... }': ! |
| 16..66 'for _ ... }': IntoIterator::IntoIter<()> |
| 16..66 'for _ ... }': &'? mut IntoIterator::IntoIter<()> |
| 16..66 'for _ ... }': fn next<IntoIterator::IntoIter<()>>(&'? mut IntoIterator::IntoIter<()>) -> Option<<IntoIterator::IntoIter<()> as Iterator>::Item> |
| 16..66 'for _ ... }': Option<IntoIterator::Item<()>> |
| 16..66 'for _ ... }': () |
| 16..66 'for _ ... }': () |
| 16..66 'for _ ... }': () |
| 16..66 'for _ ... }': () |
| 20..21 '_': IntoIterator::Item<()> |
| 25..39 '{ let x = 0; }': () |
| 31..32 'x': i32 |
| 35..36 '0': i32 |
| 40..66 '{ ... }': () |
| 54..55 'y': i32 |
| 58..59 '0': i32 |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn while_loop_block_expr_iterable() { |
| check_infer( |
| r#" |
| fn test() { |
| while { true } { |
| let y = 0; |
| } |
| } |
| "#, |
| expect![[r#" |
| 10..59 '{ ... } }': () |
| 16..57 'while ... }': ! |
| 16..57 'while ... }': () |
| 16..57 'while ... }': () |
| 22..30 '{ true }': bool |
| 24..28 'true': bool |
| 31..57 '{ ... }': () |
| 45..46 'y': i32 |
| 49..50 '0': i32 |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn bug_11242() { |
| // FIXME: wrong, should be u32 |
| check_types( |
| r#" |
| fn foo<A, B>() |
| where |
| A: IntoIterator<Item = u32>, |
| B: IntoIterator<Item = usize>, |
| { |
| let _x: <A as IntoIterator>::Item; |
| // ^^ {unknown} |
| } |
| |
| pub trait Iterator { |
| type Item; |
| } |
| |
| pub trait IntoIterator { |
| type Item; |
| type IntoIter: Iterator<Item = Self::Item>; |
| } |
| |
| impl<I: Iterator> IntoIterator for I { |
| type Item = I::Item; |
| type IntoIter = I; |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn bug_11659() { |
| check_no_mismatches( |
| r#" |
| struct LinkArray<const N: usize, LD>(LD); |
| fn f<const N: usize, LD>(x: LD) -> LinkArray<N, LD> { |
| let r = LinkArray::<N, LD>(x); |
| r |
| } |
| |
| fn test() { |
| let x = f::<2, i32>(5); |
| let y = LinkArray::<52, LinkArray<2, i32>>(x); |
| } |
| "#, |
| ); |
| check_no_mismatches( |
| r#" |
| struct LinkArray<LD, const N: usize>(LD); |
| fn f<const N: usize, LD>(x: LD) -> LinkArray<LD, N> { |
| let r = LinkArray::<LD, N>(x); |
| r |
| } |
| |
| fn test() { |
| let x = f::<i32, 2>(5); |
| let y = LinkArray::<LinkArray<i32, 2>, 52>(x); |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn const_generic_error_tolerance() { |
| check_no_mismatches( |
| r#" |
| #[lang = "sized"] |
| pub trait Sized {} |
| |
| struct CT<const N: usize, T>(T); |
| struct TC<T, const N: usize>(T); |
| fn f<const N: usize, T>(x: T) -> (CT<N, T>, TC<T, N>) { |
| let l = CT::<N, T>(x); |
| let r = TC::<N, T>(x); |
| (l, r) |
| } |
| |
| trait TR1<const N: usize>; |
| trait TR2<const N: usize>; |
| |
| impl<const N: usize, T> TR1<N> for CT<N, T>; |
| impl<const N: usize, T> TR1<5> for TC<T, N>; |
| impl<const N: usize, T> TR2<N> for CT<T, N>; |
| |
| trait TR3<const N: usize> { |
| fn tr3(&self) -> &Self; |
| } |
| |
| impl<const N: usize, T> TR3<5> for TC<T, N> { |
| fn tr3(&self) -> &Self { |
| self |
| } |
| } |
| |
| impl<const N: usize, T> TR3<Item = 5> for TC<T, N> {} |
| impl<const N: usize, T> TR3<T> for TC<T, N> {} |
| |
| fn impl_trait<const N: usize>(inp: impl TR1<N>) {} |
| fn dyn_trait<const N: usize>(inp: &dyn TR2<N>) {} |
| fn impl_trait_bad<'a, const N: usize>(inp: impl TR1<i32>) -> impl TR1<'a, i32> {} |
| fn impl_trait_very_bad<const N: usize>(inp: impl TR1<Item = i32>) -> impl TR1<'a, Item = i32, 5, Foo = N> {} |
| |
| fn test() { |
| f::<2, i32>(5); |
| f::<2, 2>(5); |
| f(5); |
| f::<i32>(5); |
| CT::<52, CT<2, i32>>(x); |
| CT::<CT<2, i32>>(x); |
| impl_trait_bad(5); |
| impl_trait_bad(12); |
| TR3<5>::tr3(); |
| TR3<{ 2+3 }>::tr3(); |
| TC::<i32, 10>(5).tr3(); |
| TC::<i32, 20>(5).tr3(); |
| TC::<i32, i32>(5).tr3(); |
| TC::<i32, { 7 + 3 }>(5).tr3(); |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn const_generic_impl_trait() { |
| check_no_mismatches( |
| r#" |
| //- minicore: from |
| |
| struct Foo<T, const M: usize>; |
| |
| trait Tr<T> { |
| fn f(T) -> Self; |
| } |
| |
| impl<T, const M: usize> Tr<[T; M]> for Foo<T, M> { |
| fn f(_: [T; M]) -> Self { |
| Self |
| } |
| } |
| |
| fn test() { |
| Foo::f([1, 2, 7, 10]); |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn nalgebra_factorial() { |
| check_no_mismatches( |
| r#" |
| const FACTORIAL: [u128; 4] = [1, 1, 2, 6]; |
| |
| fn factorial(n: usize) -> u128 { |
| match FACTORIAL.get(n) { |
| Some(f) => *f, |
| None => panic!("{}! is greater than u128::MAX", n), |
| } |
| } |
| "#, |
| ) |
| } |
| |
| #[test] |
| fn regression_11688_1() { |
| check_no_mismatches( |
| r#" |
| pub struct Buffer<T>(T); |
| type Writer = Buffer<u8>; |
| impl<T> Buffer<T> { |
| fn extend_from_array<const N: usize>(&mut self, xs: &[T; N]) { |
| loop {} |
| } |
| } |
| trait Encode<S> { |
| fn encode(self, w: &mut Writer, s: &mut S); |
| } |
| impl<S> Encode<S> for u8 { |
| fn encode(self, w: &mut Writer, _: &mut S) { |
| w.extend_from_array(&self.to_le_bytes()); |
| } |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn regression_11688_2() { |
| check_types( |
| r#" |
| union MaybeUninit<T> { |
| uninit: (), |
| value: T, |
| } |
| |
| impl<T> MaybeUninit<T> { |
| fn uninit_array<const LEN: usize>() -> [Self; LEN] { |
| loop {} |
| } |
| } |
| |
| fn main() { |
| let x = MaybeUninit::<i32>::uninit_array::<1>(); |
| //^ [MaybeUninit<i32>; 1] |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn regression_11688_3() { |
| check_types( |
| r#" |
| //- minicore: iterator |
| struct Ar<T, const N: u8>(T); |
| fn f<const LEN: usize, T, const BASE: u8>( |
| num_zeros: usize, |
| ) -> &dyn Iterator<Item = [Ar<T, BASE>; LEN]> { |
| loop {} |
| } |
| fn dynamic_programming() { |
| let board = f::<9, u8, 7>(1).next(); |
| //^^^^^ Option<[Ar<u8, 7>; 9]> |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn regression_11688_4() { |
| check_types( |
| r#" |
| trait Bar<const C: usize> { |
| fn baz(&self) -> [i32; C]; |
| } |
| |
| fn foo(x: &dyn Bar<2>) { |
| x.baz(); |
| //^^^^^^^ [i32; 2] |
| } |
| "#, |
| ) |
| } |
| |
| #[test] |
| fn gat_crash_1() { |
| check_no_mismatches( |
| r#" |
| trait ATrait {} |
| |
| trait Crash { |
| type Member<const N: usize>: ATrait; |
| fn new<const N: usize>() -> Self::Member<N>; |
| } |
| |
| fn test<T: Crash>() { |
| T::new(); |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn gat_crash_2() { |
| check_no_mismatches( |
| r#" |
| pub struct InlineStorage {} |
| |
| pub struct InlineStorageHandle<T: ?Sized> {} |
| |
| pub unsafe trait Storage { |
| type Handle<T: ?Sized>; |
| fn create<T: ?Sized>() -> Self::Handle<T>; |
| } |
| |
| unsafe impl Storage for InlineStorage { |
| type Handle<T: ?Sized> = InlineStorageHandle<T>; |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn gat_crash_3() { |
| check_no_mismatches( |
| r#" |
| trait Collection { |
| type Item; |
| type Member<T>: Collection<Item = T>; |
| fn add(&mut self, value: Self::Item) -> Result<(), Self::Error>; |
| } |
| struct ConstGen<T, const N: usize> { |
| data: [T; N], |
| } |
| impl<T, const N: usize> Collection for ConstGen<T, N> { |
| type Item = T; |
| type Member<U> = ConstGen<U, N>; |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn tuple_struct_pattern_with_unmatched_args_crash() { |
| check_infer( |
| r#" |
| struct S(usize); |
| fn main() { |
| let S(.., a, b) = S(1); |
| let (.., a, b) = (1,); |
| } |
| "#, |
| expect![[r#" |
| 27..85 '{ ...1,); }': () |
| 37..48 'S(.., a, b)': S |
| 43..44 'a': usize |
| 46..47 'b': {unknown} |
| 51..52 'S': fn S(usize) -> S |
| 51..55 'S(1)': S |
| 53..54 '1': usize |
| 65..75 '(.., a, b)': (i32, {unknown}) |
| 70..71 'a': i32 |
| 73..74 'b': {unknown} |
| 78..82 '(1,)': (i32,) |
| 79..80 '1': i32 |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn trailing_empty_macro() { |
| check_no_mismatches( |
| r#" |
| macro_rules! m2 { |
| ($($t:tt)*) => {$($t)*}; |
| } |
| |
| fn macrostmts() -> u8 { |
| m2! { 0 } |
| m2! {} |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn dyn_with_unresolved_trait() { |
| check_types( |
| r#" |
| fn foo(a: &dyn DoesNotExist) { |
| a.bar(); |
| //^&'? {unknown} |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn self_assoc_with_const_generics_crash() { |
| check_no_mismatches( |
| r#" |
| trait Trait { type Item; } |
| impl<T, const N: usize> Trait for [T; N] { |
| type Item = (); |
| fn f<U>(_: Self::Item) {} |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn unsize_array_with_inference_variable() { |
| check_types( |
| r#" |
| //- minicore: try, slice |
| use core::ops::ControlFlow; |
| fn foo() -> ControlFlow<(), [usize; 1]> { loop {} } |
| fn bar() -> ControlFlow<(), ()> { |
| let a = foo()?.len(); |
| //^ usize |
| ControlFlow::Continue(()) |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn assoc_type_shorthand_with_gats_in_binders() { |
| // c.f. test `issue_4885()` |
| check_no_mismatches( |
| r#" |
| trait Gats { |
| type Assoc<T>; |
| } |
| trait Foo<T> {} |
| |
| struct Bar<'a, B: Gats, A> { |
| field: &'a dyn Foo<B::Assoc<A>>, |
| } |
| |
| fn foo(b: Bar) { |
| let _ = b.field; |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn regression_14305() { |
| check_no_mismatches( |
| r#" |
| //- minicore: add |
| trait Tr {} |
| impl Tr for [u8; C] {} |
| const C: usize = 2 + 2; |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn regression_14456() { |
| check_types( |
| r#" |
| //- minicore: future |
| async fn x() {} |
| fn f() { |
| let fut = x(); |
| let t = [0u8; { let a = 2 + 2; a }]; |
| //^ [u8; 4] |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn regression_14164() { |
| check_types( |
| r#" |
| trait Rec { |
| type K; |
| type Rebind<Tok>: Rec<K = Tok>; |
| } |
| |
| trait Expr<K> { |
| type Part: Rec<K = K>; |
| fn foo(_: <Self::Part as Rec>::Rebind<i32>) {} |
| } |
| |
| struct Head<K>(K); |
| impl<K> Rec for Head<K> { |
| type K = K; |
| type Rebind<Tok> = Head<Tok>; |
| } |
| |
| fn test<E>() |
| where |
| E: Expr<usize, Part = Head<usize>>, |
| { |
| let head; |
| //^^^^ Head<i32> |
| E::foo(head); |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn match_ergonomics_with_binding_modes_interaction() { |
| check_types( |
| r" |
| enum E { A } |
| fn foo() { |
| match &E::A { |
| b @ (x @ E::A | x) => { |
| b; |
| //^ &'? E |
| x; |
| //^ &'? E |
| } |
| } |
| }", |
| ); |
| } |
| |
| #[test] |
| fn regression_14844() { |
| check_no_mismatches( |
| r#" |
| pub type Ty = Unknown; |
| |
| pub struct Inner<T>(); |
| |
| pub struct Outer { |
| pub inner: Inner<Ty>, |
| } |
| |
| fn main() { |
| _ = Outer { |
| inner: Inner::<i32>(), |
| }; |
| } |
| "#, |
| ); |
| check_no_mismatches( |
| r#" |
| pub const ONE: usize = 1; |
| |
| pub struct Inner<const P: usize>(); |
| |
| pub struct Outer { |
| pub inner: Inner<ONE>, |
| } |
| |
| fn main() { |
| _ = Outer { |
| inner: Inner::<1>(), |
| }; |
| } |
| "#, |
| ); |
| check_no_mismatches( |
| r#" |
| pub const ONE: usize = unknown(); |
| |
| pub struct Inner<const P: usize>(); |
| |
| pub struct Outer { |
| pub inner: Inner<ONE>, |
| } |
| |
| fn main() { |
| _ = Outer { |
| inner: Inner::<1>(), |
| }; |
| } |
| "#, |
| ); |
| check_no_mismatches( |
| r#" |
| pub const N: usize = 2 + 2; |
| |
| fn f(t: [u8; N]) {} |
| |
| fn main() { |
| let a = [1, 2, 3, 4]; |
| f(a); |
| let b = [1; 4]; |
| let c: [u8; N] = b; |
| let d = [1; N]; |
| let e: [u8; N] = d; |
| let f = [1; N]; |
| let g = match f { |
| [a, b, c, d] => a + b + c + d, |
| }; |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn regression_14844_2() { |
| check_no_mismatches( |
| r#" |
| //- minicore: fn |
| pub const ONE: usize = 1; |
| |
| pub type MyInner = Inner<ONE>; |
| |
| pub struct Inner<const P: usize>(); |
| |
| impl Inner<1> { |
| fn map<F>(&self, func: F) -> bool |
| where |
| F: Fn(&MyInner) -> bool, |
| { |
| func(self) |
| } |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn dont_crash_on_slice_unsizing() { |
| check_no_mismatches( |
| r#" |
| //- minicore: slice, unsize, coerce_unsized |
| trait Tr { |
| fn f(self); |
| } |
| |
| impl Tr for [i32] { |
| fn f(self) { |
| let t; |
| x(t); |
| } |
| } |
| |
| fn x(a: [i32; 4]) { |
| let b = a.f(); |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn dont_unify_on_casts() { |
| // #15246 |
| check_types( |
| r#" |
| //- minicore: sized |
| fn unify(_: [bool; 1]) {} |
| fn casted(_: *const bool) {} |
| fn default<T>() -> T { loop {} } |
| |
| fn test() { |
| let foo = default(); |
| //^^^ [bool; 1] |
| |
| casted(&foo as *const _); |
| unify(foo); |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn rustc_test_issue_52437() { |
| check_types( |
| r#" |
| //- minicore: sized |
| fn main() { |
| let x = [(); &(&'static: loop { |x| {}; }) as *const _ as usize] |
| //^ [(); _] |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn incorrect_variant_form_through_alias_caught() { |
| check_types( |
| r#" |
| enum Enum { Braced {}, Unit, Tuple() } |
| type Alias = Enum; |
| |
| fn main() { |
| Alias::Braced; |
| //^^^^^^^^^^^^^ {unknown} |
| let Alias::Braced = loop {}; |
| //^^^^^^^^^^^^^ ! |
| let Alias::Braced(..) = loop {}; |
| //^^^^^^^^^^^^^^^^^ Enum |
| |
| Alias::Unit(); |
| //^^^^^^^^^^^^^ {unknown} |
| Alias::Unit{}; |
| //^^^^^^^^^^^^^ Enum |
| let Alias::Unit() = loop {}; |
| //^^^^^^^^^^^^^ Enum |
| let Alias::Unit{} = loop {}; |
| //^^^^^^^^^^^^^ Enum |
| } |
| "#, |
| ) |
| } |
| |
| #[test] |
| fn cfg_first_trait_param_16141() { |
| check_no_mismatches( |
| r#" |
| //- minicore: sized, coerce_unsized |
| trait Bar { |
| fn bar(&self) {} |
| } |
| |
| impl<#[cfg(feature = "a-feature")] A> Bar for (){} |
| "#, |
| ) |
| } |
| |
| #[test] |
| fn nested_anon_generics_and_where_bounds_17173() { |
| check_types( |
| r#" |
| //- minicore: sized, fn |
| pub trait Lookup { |
| type Data; |
| fn lookup(&self) -> Self::Data; |
| } |
| pub trait ItemTreeLoc { |
| type Id; |
| } |
| fn id_to_generics(id: impl Lookup<Data = impl ItemTreeLoc<Id = ()>>, |
| //^^ impl Lookup<Data = impl ItemTreeLoc<Id = ()>> |
| enabled_params: impl Fn(), |
| //^^^^^^^^^^^^^^ impl Fn() |
| ) |
| where |
| (): Sized, |
| {} |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn tait_async_stack_overflow_17199() { |
| check_types( |
| r#" |
| //- minicore: fmt, future |
| type Foo = impl core::fmt::Debug; |
| |
| async fn foo() -> Foo { |
| () |
| } |
| |
| async fn test() { |
| let t = foo().await; |
| // ^ impl Debug |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn lifetime_params_move_param_defaults() { |
| check_types( |
| r#" |
| pub struct Thing<'s, T = u32>; |
| |
| impl <'s> Thing<'s> { |
| pub fn new() -> Thing<'s> { |
| Thing |
| //^^^^^ Thing<'?, u32> |
| } |
| } |
| |
| fn main() { |
| let scope = |
| //^^^^^ &'? Thing<'?, u32> |
| &Thing::new(); |
| //^^^^^^^^^^^^ Thing<'?, u32> |
| } |
| "#, |
| ); |
| } |
| |
| #[test] |
| fn issue_17734() { |
| check_types( |
| r#" |
| fn test() { |
| let x = S::foo::<'static, &()>(&S); |
| // ^ Wrap<'?, ()> |
| let x = S::foo::<&()>(&S); |
| // ^ Wrap<'?, ()> |
| let x = S.foo::<'static, &()>(); |
| // ^ Wrap<'?, ()> |
| let x = S.foo::<&()>(); |
| // ^ Wrap<'?, ()> |
| } |
| |
| struct S; |
| |
| impl S { |
| pub fn foo<'a, T: Trait<'a>>(&'a self) -> T::Proj { |
| loop {} |
| } |
| } |
| |
| struct Wrap<'a, T>(T); |
| trait Trait<'a> { |
| type Proj; |
| } |
| impl<'a, T> Trait<'a> for &'a T { |
| type Proj = Wrap<'a, T>; |
| } |
| "#, |
| ) |
| } |
| |
| #[test] |
| fn issue_17738() { |
| check_types( |
| r#" |
| //- minicore: index |
| use core::ops::{Index, IndexMut}; |
| |
| struct Foo<K, V>(K, V); |
| |
| struct Bar; |
| |
| impl Bar { |
| fn bar(&mut self) {} |
| } |
| |
| impl<K, V> Foo<K, V> { |
| fn new(_v: V) -> Self { |
| loop {} |
| } |
| } |
| |
| impl<K, B, V> Index<B> for Foo<K, V> { |
| type Output = V; |
| fn index(&self, _index: B) -> &Self::Output { |
| loop {} |
| } |
| } |
| |
| impl<K, V> IndexMut<K> for Foo<K, V> { |
| fn index_mut(&mut self, _index: K) -> &mut Self::Output { |
| loop {} |
| } |
| } |
| |
| fn test() { |
| let mut t1 = Foo::new(Bar); |
| // ^^^^^^ Foo<&'? (), Bar> |
| t1[&()] = Bar; |
| |
| let mut t2 = Foo::new(Bar); |
| // ^^^^^^ Foo<&'? (), Bar> |
| t2[&()].bar(); |
| } |
| "#, |
| ) |
| } |
| |
| #[test] |
| fn issue_17191() { |
| check_types( |
| r#" |
| trait A { |
| type Item; |
| } |
| |
| trait B<T> {} |
| |
| fn foo<T: B<impl A>>() {} |
| |
| fn test() { |
| let f = foo; |
| //^ fn foo<{unknown}>() |
| }"#, |
| ); |
| } |
| |
| #[test] |
| fn issue_17866() { |
| check_infer( |
| r#" |
| trait T { |
| type A; |
| } |
| |
| type Foo = <S as T>::A; |
| |
| fn main() { |
| Foo {}; |
| } |
| "#, |
| expect![[r#" |
| 60..75 '{ Foo {}; }': () |
| 66..72 'Foo {}': {unknown} |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_17711() { |
| check_infer( |
| r#" |
| //- minicore: deref |
| use core::ops::Deref; |
| |
| struct Struct<'a, T>(&'a T); |
| |
| trait Trait {} |
| |
| impl<'a, T: Deref<Target = impl Trait>> Struct<'a, T> { |
| fn foo(&self) -> &Self { self } |
| |
| fn bar(&self) { |
| let _ = self.foo(); |
| } |
| |
| } |
| "#, |
| expect![[r#" |
| 137..141 'self': &'? Struct<'a, T> |
| 152..160 '{ self }': &'? Struct<'a, T> |
| 154..158 'self': &'? Struct<'a, T> |
| 174..178 'self': &'? Struct<'a, T> |
| 180..215 '{ ... }': () |
| 194..195 '_': &'? Struct<'?, T> |
| 198..202 'self': &'? Struct<'a, T> |
| 198..208 'self.foo()': &'? Struct<'?, T> |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_17767() { |
| check_infer( |
| r#" |
| extern "C" { |
| type Foo<T>; |
| } |
| |
| fn f() -> Foo {} |
| "#, |
| expect![[r#" |
| 47..49 '{}': Foo |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_17921() { |
| check_infer( |
| r#" |
| //- minicore: future |
| trait Foo {} |
| type Bar = impl Foo; |
| |
| async fn f<A, B, C>() -> Bar {} |
| "#, |
| expect![[r#" |
| 64..66 '{}': () |
| 64..66 '{}': impl Future<Output = ()> |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_18109() { |
| check_infer( |
| r#" |
| //- minicore: option |
| struct Map<T, U>(T, U); |
| |
| impl<T, U> Map<T, U> { |
| fn new() -> Self { loop {} } |
| fn get(&self, _: &T) -> Option<&U> { loop {} } |
| } |
| |
| fn test(x: bool) { |
| let map = Map::new(); |
| let _ = match x { |
| true => { |
| let Some(val) = map.get(&8) else { return }; |
| *val |
| } |
| false => return, |
| _ => 42, |
| }; |
| } |
| "#, |
| expect![[r#" |
| 69..80 '{ loop {} }': Map<T, U> |
| 71..78 'loop {}': ! |
| 76..78 '{}': () |
| 93..97 'self': &'? Map<T, U> |
| 99..100 '_': &'? T |
| 120..131 '{ loop {} }': Option<&'? U> |
| 122..129 'loop {}': ! |
| 127..129 '{}': () |
| 143..144 'x': bool |
| 152..354 '{ ... }; }': () |
| 162..165 'map': Map<i32, i32> |
| 168..176 'Map::new': fn new<i32, i32>() -> Map<i32, i32> |
| 168..178 'Map::new()': Map<i32, i32> |
| 188..189 '_': i32 |
| 192..351 'match ... }': i32 |
| 198..199 'x': bool |
| 210..214 'true': bool |
| 210..214 'true': bool |
| 218..303 '{ ... }': i32 |
| 236..245 'Some(val)': Option<&'? i32> |
| 241..244 'val': &'? i32 |
| 248..251 'map': Map<i32, i32> |
| 248..259 'map.get(&8)': Option<&'? i32> |
| 256..258 '&8': &'? i32 |
| 257..258 '8': i32 |
| 265..275 '{ return }': ! |
| 267..273 'return': ! |
| 289..293 '*val': i32 |
| 290..293 'val': &'? i32 |
| 312..317 'false': bool |
| 312..317 'false': bool |
| 321..327 'return': ! |
| 337..338 '_': bool |
| 342..344 '42': i32 |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn issue_19730() { |
| check_infer( |
| r#" |
| trait Trait<T = Self> {} |
| |
| trait Foo { |
| type Bar<A, B>: Trait; |
| |
| fn foo<A, B>(bar: Self::Bar<A, B>) { |
| let _ = bar; |
| } |
| } |
| "#, |
| expect![[r#" |
| 83..86 'bar': Foo::Bar<Self, A, B> |
| 105..133 '{ ... }': () |
| 119..120 '_': Foo::Bar<Self, A, B> |
| 123..126 'bar': Foo::Bar<Self, A, B> |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn no_panic_on_recursive_const() { |
| check_infer( |
| r#" |
| struct Foo<const N: usize> {} |
| impl<const N: Foo<N>> Foo<N> { |
| fn foo(self) {} |
| } |
| |
| fn test() { |
| let _ = N; |
| } |
| "#, |
| expect![[r#" |
| 72..76 'self': Foo<N> |
| 78..80 '{}': () |
| 94..112 '{ ...= N; }': () |
| 104..105 '_': {unknown} |
| 108..109 'N': {unknown} |
| "#]], |
| ); |
| |
| check_infer( |
| r#" |
| struct Foo<const N: usize>; |
| const N: Foo<N> = Foo; |
| |
| impl<const N: usize> Foo<N> { |
| fn foo(self) -> usize { |
| N |
| } |
| } |
| |
| fn test() { |
| let _ = N; |
| } |
| "#, |
| expect![[r#" |
| 93..97 'self': Foo<N> |
| 108..125 '{ ... }': usize |
| 118..119 'N': usize |
| 139..157 '{ ...= N; }': () |
| 149..150 '_': Foo<_> |
| 153..154 'N': Foo<_> |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn rust_destruct_option_clone() { |
| check_types( |
| r#" |
| //- minicore: option, drop |
| fn test(o: &Option<i32>) { |
| o.my_clone(); |
| //^^^^^^^^^^^^ Option<i32> |
| } |
| pub trait MyClone: Sized { |
| fn my_clone(&self) -> Self; |
| } |
| impl<T> const MyClone for Option<T> |
| where |
| T: ~const MyClone + ~const Destruct, |
| { |
| fn my_clone(&self) -> Self { |
| match self { |
| Some(x) => Some(x.my_clone()), |
| None => None, |
| } |
| } |
| } |
| impl const MyClone for i32 { |
| fn my_clone(&self) -> Self { |
| *self |
| } |
| } |
| #[lang = "destruct"] |
| pub trait Destruct {} |
| "#, |
| ); |
| } |
