use insta::assert_snapshot; use test_utils::mark; use super::{infer, infer_with_mismatches}; #[test] fn infer_pattern() { assert_snapshot!( infer(r#" fn test(x: &i32) { let y = x; let &z = x; let a = z; let (c, d) = (1, "hello"); for (e, f) in some_iter { let g = e; } if let [val] = opt { let h = val; } let lambda = |a: u64, b, c: i32| { a + b; c }; let ref ref_to_x = x; let mut mut_x = x; let ref mut mut_ref_to_x = x; let k = mut_ref_to_x; } "#), @r###" 8..9 'x': &i32 17..368 '{ ...o_x; }': () 27..28 'y': &i32 31..32 'x': &i32 42..44 '&z': &i32 43..44 'z': i32 47..48 'x': &i32 58..59 'a': i32 62..63 'z': i32 73..79 '(c, d)': (i32, &str) 74..75 'c': i32 77..78 'd': &str 82..94 '(1, "hello")': (i32, &str) 83..84 '1': i32 86..93 '"hello"': &str 101..151 'for (e... }': () 105..111 '(e, f)': ({unknown}, {unknown}) 106..107 'e': {unknown} 109..110 'f': {unknown} 115..124 'some_iter': {unknown} 125..151 '{ ... }': () 139..140 'g': {unknown} 143..144 'e': {unknown} 157..204 'if let... }': () 164..169 '[val]': [{unknown}] 165..168 'val': {unknown} 172..175 'opt': [{unknown}] 176..204 '{ ... }': () 190..191 'h': {unknown} 194..197 'val': {unknown} 214..220 'lambda': |u64, u64, i32| -> i32 223..255 '|a: u6...b; c }': |u64, u64, i32| -> i32 224..225 'a': u64 232..233 'b': u64 235..236 'c': i32 243..255 '{ a + b; c }': i32 245..246 'a': u64 245..250 'a + b': u64 249..250 'b': u64 252..253 'c': i32 266..278 'ref ref_to_x': &&i32 281..282 'x': &i32 292..301 'mut mut_x': &i32 304..305 'x': &i32 315..335 'ref mu...f_to_x': &mut &i32 338..339 'x': &i32 349..350 'k': &mut &i32 353..365 'mut_ref_to_x': &mut &i32 "### ); } #[test] fn infer_literal_pattern() { assert_snapshot!( infer_with_mismatches(r#" fn any() -> T { loop {} } fn test(x: &i32) { if let "foo" = any() {} if let 1 = any() {} if let 1u32 = any() {} if let 1f32 = any() {} if let 1.0 = any() {} if let true = any() {} } "#, true), @r###" 17..28 '{ loop {} }': T 19..26 'loop {}': ! 24..26 '{}': () 37..38 'x': &i32 46..208 '{ ...) {} }': () 52..75 'if let...y() {}': () 59..64 '"foo"': &str 59..64 '"foo"': &str 67..70 'any': fn any<&str>() -> &str 67..72 'any()': &str 73..75 '{}': () 80..99 'if let...y() {}': () 87..88 '1': i32 87..88 '1': i32 91..94 'any': fn any() -> i32 91..96 'any()': i32 97..99 '{}': () 104..126 'if let...y() {}': () 111..115 '1u32': u32 111..115 '1u32': u32 118..121 'any': fn any() -> u32 118..123 'any()': u32 124..126 '{}': () 131..153 'if let...y() {}': () 138..142 '1f32': f32 138..142 '1f32': f32 145..148 'any': fn any() -> f32 145..150 'any()': f32 151..153 '{}': () 158..179 'if let...y() {}': () 165..168 '1.0': f64 165..168 '1.0': f64 171..174 'any': fn any() -> f64 171..176 'any()': f64 177..179 '{}': () 184..206 'if let...y() {}': () 191..195 'true': bool 191..195 'true': bool 198..201 'any': fn any() -> bool 198..203 'any()': bool 204..206 '{}': () "### ); } #[test] fn infer_range_pattern() { assert_snapshot!( infer_with_mismatches(r#" fn test(x: &i32) { if let 1..76 = 2u32 {} if let 1..=76 = 2u32 {} } "#, true), @r###" 8..9 'x': &i32 17..75 '{ ...2 {} }': () 23..45 'if let...u32 {}': () 30..35 '1..76': u32 38..42 '2u32': u32 43..45 '{}': () 50..73 'if let...u32 {}': () 57..63 '1..=76': u32 66..70 '2u32': u32 71..73 '{}': () "### ); } #[test] fn infer_pattern_match_ergonomics() { assert_snapshot!( infer(r#" struct A(T); fn test() { let A(n) = &A(1); let A(n) = &mut A(1); } "#), @r###" 27..78 '{ ...(1); }': () 37..41 'A(n)': A 39..40 'n': &i32 44..49 '&A(1)': &A 45..46 'A': A(i32) -> A 45..49 'A(1)': A 47..48 '1': i32 59..63 'A(n)': A 61..62 'n': &mut i32 66..75 '&mut A(1)': &mut A 71..72 'A': A(i32) -> A 71..75 'A(1)': A 73..74 '1': i32 "### ); } #[test] fn infer_pattern_match_ergonomics_ref() { mark::check!(match_ergonomics_ref); assert_snapshot!( infer(r#" fn test() { let v = &(1, &2); let (_, &w) = v; } "#), @r###" 10..56 '{ ...= v; }': () 20..21 'v': &(i32, &i32) 24..32 '&(1, &2)': &(i32, &i32) 25..32 '(1, &2)': (i32, &i32) 26..27 '1': i32 29..31 '&2': &i32 30..31 '2': i32 42..49 '(_, &w)': (i32, &i32) 43..44 '_': i32 46..48 '&w': &i32 47..48 'w': i32 52..53 'v': &(i32, &i32) "### ); } #[test] fn infer_pattern_match_slice() { assert_snapshot!( infer(r#" fn test() { let slice: &[f64] = &[0.0]; match slice { &[] => {}, &[a] => { a; }, &[b, c] => { b; c; } _ => {} } } "#), @r###" 10..209 '{ ... } }': () 20..25 'slice': &[f64] 36..42 '&[0.0]': &[f64; _] 37..42 '[0.0]': [f64; _] 38..41 '0.0': f64 48..207 'match ... }': () 54..59 'slice': &[f64] 70..73 '&[]': &[f64] 71..73 '[]': [f64] 77..79 '{}': () 89..93 '&[a]': &[f64] 90..93 '[a]': [f64] 91..92 'a': f64 97..123 '{ ... }': () 111..112 'a': f64 133..140 '&[b, c]': &[f64] 134..140 '[b, c]': [f64] 135..136 'b': f64 138..139 'c': f64 144..185 '{ ... }': () 158..159 'b': f64 173..174 'c': f64 194..195 '_': &[f64] 199..201 '{}': () "### ); } #[test] fn infer_pattern_match_arr() { assert_snapshot!( infer(r#" fn test() { let arr: [f64; 2] = [0.0, 1.0]; match arr { [1.0, a] => { a; }, [b, c] => { b; c; } } } "#), @r###" 10..179 '{ ... } }': () 20..23 'arr': [f64; _] 36..46 '[0.0, 1.0]': [f64; _] 37..40 '0.0': f64 42..45 '1.0': f64 52..177 'match ... }': () 58..61 'arr': [f64; _] 72..80 '[1.0, a]': [f64; _] 73..76 '1.0': f64 73..76 '1.0': f64 78..79 'a': f64 84..110 '{ ... }': () 98..99 'a': f64 120..126 '[b, c]': [f64; _] 121..122 'b': f64 124..125 'c': f64 130..171 '{ ... }': () 144..145 'b': f64 159..160 'c': f64 "### ); } #[test] fn infer_adt_pattern() { assert_snapshot!( infer(r#" enum E { A { x: usize }, B } struct S(u32, E); fn test() { let e = E::A { x: 3 }; let S(y, z) = foo; let E::A { x: new_var } = e; match e { E::A { x } => x, E::B if foo => 1, E::B => 10, }; let ref d @ E::A { .. } = e; d; } "#), @r###" 67..288 '{ ... d; }': () 77..78 'e': E 81..94 'E::A { x: 3 }': E 91..92 '3': usize 105..112 'S(y, z)': S 107..108 'y': u32 110..111 'z': E 115..118 'foo': S 128..147 'E::A {..._var }': E 138..145 'new_var': usize 150..151 'e': E 158..244 'match ... }': usize 164..165 'e': E 176..186 'E::A { x }': E 183..184 'x': usize 190..191 'x': usize 201..205 'E::B': E 209..212 'foo': bool 216..217 '1': usize 227..231 'E::B': E 235..237 '10': usize 255..274 'ref d ...{ .. }': &E 263..274 'E::A { .. }': E 277..278 'e': E 284..285 'd': &E "### ); } #[test] fn enum_variant_through_self_in_pattern() { assert_snapshot!( infer(r#" enum E { A { x: usize }, B(usize), C } impl E { fn test() { match (loop {}) { Self::A { x } => { x; }, Self::B(x) => { x; }, Self::C => {}, }; } } "#), @r###" 75..217 '{ ... }': () 85..210 'match ... }': () 92..99 'loop {}': ! 97..99 '{}': () 115..128 'Self::A { x }': E 125..126 'x': usize 132..138 '{ x; }': () 134..135 'x': usize 152..162 'Self::B(x)': E 160..161 'x': usize 166..172 '{ x; }': () 168..169 'x': usize 186..193 'Self::C': E 197..199 '{}': () "### ); } #[test] fn infer_generics_in_patterns() { assert_snapshot!( infer(r#" struct A { x: T, } enum Option { Some(T), None, } fn test(a1: A, o: Option) { let A { x: x2 } = a1; let A:: { x: x3 } = A { x: 1 }; match o { Option::Some(t) => t, _ => 1, }; } "#), @r###" 78..80 'a1': A 90..91 'o': Option 106..243 '{ ... }; }': () 116..127 'A { x: x2 }': A 123..125 'x2': u32 130..132 'a1': A 142..160 'A:: 156..158 'x3': i64 163..173 'A { x: 1 }': A 170..171 '1': i64 179..240 'match ... }': u64 185..186 'o': Option 197..212 'Option::Some(t)': Option 210..211 't': u64 216..217 't': u64 227..228 '_': Option 232..233 '1': u64 "### ); } #[test] fn infer_const_pattern() { assert_snapshot!( infer_with_mismatches(r#" enum Option { None } use Option::None; struct Foo; const Bar: usize = 1; fn test() { let a: Option = None; let b: Option = match a { None => None, }; let _: () = match () { Foo => Foo }; // Expected mismatch let _: () = match () { Bar => Bar }; // Expected mismatch } "#, true), @r###" 73..74 '1': usize 87..309 '{ ...atch }': () 97..98 'a': Option 114..118 'None': Option 128..129 'b': Option 145..182 'match ... }': Option 151..152 'a': Option 163..167 'None': Option 171..175 'None': Option 192..193 '_': () 200..223 'match ... Foo }': Foo 206..208 '()': () 211..214 'Foo': Foo 218..221 'Foo': Foo 254..255 '_': () 262..285 'match ... Bar }': usize 268..270 '()': () 273..276 'Bar': usize 280..283 'Bar': usize 200..223: expected (), got Foo 262..285: expected (), got usize "### ); } #[test] fn infer_guard() { assert_snapshot!( infer(r#" struct S; impl S { fn foo(&self) -> bool { false } } fn main() { match S { s if s.foo() => (), } } "#), @r###" 27..31 'self': &S 41..50 '{ false }': bool 43..48 'false': bool 64..115 '{ ... } }': () 70..113 'match ... }': () 76..77 'S': S 88..89 's': S 93..94 's': S 93..100 's.foo()': bool 104..106 '()': () "###) } #[test] fn match_ergonomics_in_closure_params() { assert_snapshot!( infer(r#" #[lang = "fn_once"] trait FnOnce { type Output; } fn foo U>(t: T, f: F) -> U { loop {} } fn test() { foo(&(1, "a"), |&(x, y)| x); // normal, no match ergonomics foo(&(1, "a"), |(x, y)| x); } "#), @r###" 93..94 't': T 99..100 'f': F 110..121 '{ loop {} }': U 112..119 'loop {}': ! 117..119 '{}': () 133..232 '{ ... x); }': () 139..142 'foo': fn foo<&(i32, &str), i32, |&(i32, &str)| -> i32>(&(i32, &str), |&(i32, &str)| -> i32) -> i32 139..166 'foo(&(...y)| x)': i32 143..152 '&(1, "a")': &(i32, &str) 144..152 '(1, "a")': (i32, &str) 145..146 '1': i32 148..151 '"a"': &str 154..165 '|&(x, y)| x': |&(i32, &str)| -> i32 155..162 '&(x, y)': &(i32, &str) 156..162 '(x, y)': (i32, &str) 157..158 'x': i32 160..161 'y': &str 164..165 'x': i32 203..206 'foo': fn foo<&(i32, &str), &i32, |&(i32, &str)| -> &i32>(&(i32, &str), |&(i32, &str)| -> &i32) -> &i32 203..229 'foo(&(...y)| x)': &i32 207..216 '&(1, "a")': &(i32, &str) 208..216 '(1, "a")': (i32, &str) 209..210 '1': i32 212..215 '"a"': &str 218..228 '|(x, y)| x': |&(i32, &str)| -> &i32 219..225 '(x, y)': (i32, &str) 220..221 'x': &i32 223..224 'y': &&str 227..228 'x': &i32 "### ); }