From 6a77ec7bbe6ddbf663dce9529d11d1bb56c5489a Mon Sep 17 00:00:00 2001 From: Aleksey Kladov Date: Thu, 13 Aug 2020 16:35:29 +0200 Subject: Rename ra_hir_ty -> hir_ty --- crates/hir_ty/src/tests/patterns.rs | 656 ++++++++++++++++++++++++++++++++++++ 1 file changed, 656 insertions(+) create mode 100644 crates/hir_ty/src/tests/patterns.rs (limited to 'crates/hir_ty/src/tests/patterns.rs') diff --git a/crates/hir_ty/src/tests/patterns.rs b/crates/hir_ty/src/tests/patterns.rs new file mode 100644 index 000000000..39fabf7eb --- /dev/null +++ b/crates/hir_ty/src/tests/patterns.rs @@ -0,0 +1,656 @@ +use expect::expect; +use test_utils::mark; + +use super::{check_infer, check_infer_with_mismatches}; + +#[test] +fn infer_pattern() { + check_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; + } + "#, + expect![[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() { + check_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() {} + } + "#, + expect![[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() { + check_infer_with_mismatches( + r#" + fn test(x: &i32) { + if let 1..76 = 2u32 {} + if let 1..=76 = 2u32 {} + } + "#, + expect![[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() { + check_infer( + r#" + struct A(T); + + fn test() { + let A(n) = &A(1); + let A(n) = &mut A(1); + } + "#, + expect![[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); + check_infer( + r#" + fn test() { + let v = &(1, &2); + let (_, &w) = v; + } + "#, + expect![[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() { + check_infer( + r#" + fn test() { + let slice: &[f64] = &[0.0]; + match slice { + &[] => {}, + &[a] => { + a; + }, + &[b, c] => { + b; + c; + } + _ => {} + } + } + "#, + expect![[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_string_literal() { + check_infer_with_mismatches( + r#" + fn test() { + let s: &str = "hello"; + match s { + "hello" => {} + _ => {} + } + } + "#, + expect![[r#" + 10..98 '{ ... } }': () + 20..21 's': &str + 30..37 '"hello"': &str + 43..96 'match ... }': () + 49..50 's': &str + 61..68 '"hello"': &str + 61..68 '"hello"': &str + 72..74 '{}': () + 83..84 '_': &str + 88..90 '{}': () + "#]], + ); +} + +#[test] +fn infer_pattern_match_or() { + check_infer_with_mismatches( + r#" + fn test() { + let s: &str = "hello"; + match s { + "hello" | "world" => {} + _ => {} + } + } + "#, + expect![[r#" + 10..108 '{ ... } }': () + 20..21 's': &str + 30..37 '"hello"': &str + 43..106 'match ... }': () + 49..50 's': &str + 61..68 '"hello"': &str + 61..68 '"hello"': &str + 61..78 '"hello...world"': &str + 71..78 '"world"': &str + 71..78 '"world"': &str + 82..84 '{}': () + 93..94 '_': &str + 98..100 '{}': () + "#]], + ); +} + +#[test] +fn infer_pattern_match_arr() { + check_infer( + r#" + fn test() { + let arr: [f64; 2] = [0.0, 1.0]; + match arr { + [1.0, a] => { + a; + }, + [b, c] => { + b; + c; + } + } + } + "#, + expect![[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() { + check_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; + } + "#, + expect![[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() { + check_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 => {}, + }; + } + } + "#, + expect![[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() { + check_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, + }; + } + "#, + expect![[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() { + check_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 + } + "#, + expect![[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() { + check_infer( + r#" +struct S; +impl S { fn foo(&self) -> bool { false } } + +fn main() { + match S { + s if s.foo() => (), + } +} + "#, + expect![[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() { + check_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); + } + "#, + expect![[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 + "#]], + ); +} + +#[test] +fn slice_tail_pattern() { + check_infer( + r#" + fn foo(params: &[i32]) { + match params { + [head, tail @ ..] => { + } + } + } + "#, + expect![[r#" + 7..13 'params': &[i32] + 23..92 '{ ... } }': () + 29..90 'match ... }': () + 35..41 'params': &[i32] + 52..69 '[head,... @ ..]': [i32] + 53..57 'head': &i32 + 59..68 'tail @ ..': &[i32] + 66..68 '..': [i32] + 73..84 '{ }': () + "#]], + ); +} -- cgit v1.2.3