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Commit 42b77c7

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NadrierilNadrieril
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Add some tests
1 parent 75e1acb commit 42b77c7

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+71
-28
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2 files changed

+71
-28
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‎src/test/ui/pattern/usefulness/consts-opaque.rs

Lines changed: 35 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -25,10 +25,6 @@ enum Baz {
2525
impl Eq for Baz {}
2626
const BAZ: Baz = Baz::Baz1;
2727

28-
type Quux = fn(usize, usize) -> usize;
29-
fn quux(a: usize, b: usize) -> usize { a + b }
30-
const QUUX: Quux = quux;
31-
3228
fn main() {
3329
match FOO {
3430
FOO => {}
@@ -106,9 +102,44 @@ fn main() {
106102
//~^ ERROR unreachable pattern
107103
}
108104

105+
type Quux = fn(usize, usize) -> usize;
106+
fn quux(a: usize, b: usize) -> usize { a + b }
107+
const QUUX: Quux = quux;
108+
109109
match QUUX {
110110
QUUX => {}
111111
QUUX => {}
112112
_ => {}
113113
}
114+
115+
#[derive(PartialEq, Eq)]
116+
struct Wrap<T>(T);
117+
const WRAPQUUX: Wrap<Quux> = Wrap(quux);
118+
119+
match WRAPQUUX {
120+
WRAPQUUX => {}
121+
WRAPQUUX => {}
122+
Wrap(_) => {}
123+
}
124+
125+
match WRAPQUUX {
126+
Wrap(_) => {}
127+
WRAPQUUX => {} // detected unreachable because we do inspect the `Wrap` layer
128+
//~^ ERROR unreachable pattern
129+
}
130+
131+
#[derive(PartialEq, Eq)]
132+
enum WhoKnows<T> {
133+
Yay(T),
134+
Nope,
135+
};
136+
const WHOKNOWSQUUX: WhoKnows<Quux> = WhoKnows::Yay(quux);
137+
138+
match WHOKNOWSQUUX {
139+
WHOKNOWSQUUX => {}
140+
WhoKnows::Yay(_) => {}
141+
WHOKNOWSQUUX => {} // detected unreachable because we do inspect the `WhoKnows` layer
142+
//~^ ERROR unreachable pattern
143+
WhoKnows::Nope => {}
144+
}
114145
}

‎src/test/ui/pattern/usefulness/consts-opaque.stderr

Lines changed: 36 additions & 24 deletions
Original file line numberDiff line numberDiff line change
@@ -1,11 +1,11 @@
11
error: to use a constant of type `Foo` in a pattern, `Foo` must be annotated with `#[derive(PartialEq, Eq)]`
2-
--> $DIR/consts-opaque.rs:34:9
2+
--> $DIR/consts-opaque.rs:30:9
33
|
44
LL | FOO => {}
55
| ^^^
66

77
error: unreachable pattern
8-
--> $DIR/consts-opaque.rs:36:9
8+
--> $DIR/consts-opaque.rs:32:9
99
|
1010
LL | _ => {} // should not be emitting unreachable warning
1111
| ^
@@ -17,19 +17,19 @@ LL | #![deny(unreachable_patterns)]
1717
| ^^^^^^^^^^^^^^^^^^^^
1818

1919
error: to use a constant of type `Foo` in a pattern, `Foo` must be annotated with `#[derive(PartialEq, Eq)]`
20-
--> $DIR/consts-opaque.rs:41:9
20+
--> $DIR/consts-opaque.rs:37:9
2121
|
2222
LL | FOO_REF => {}
2323
| ^^^^^^^
2424

2525
error: unreachable pattern
26-
--> $DIR/consts-opaque.rs:43:9
26+
--> $DIR/consts-opaque.rs:39:9
2727
|
2828
LL | Foo(_) => {} // should not be emitting unreachable warning
2929
| ^^^^^^
3030

3131
warning: to use a constant of type `Foo` in a pattern, `Foo` must be annotated with `#[derive(PartialEq, Eq)]`
32-
--> $DIR/consts-opaque.rs:49:9
32+
--> $DIR/consts-opaque.rs:45:9
3333
|
3434
LL | FOO_REF_REF => {}
3535
| ^^^^^^^^^^^
@@ -39,21 +39,21 @@ LL | FOO_REF_REF => {}
3939
= note: for more information, see issue #62411 <https://github.com/rust-lang/rust/issues/62411>
4040

4141
error: to use a constant of type `Bar` in a pattern, `Bar` must be annotated with `#[derive(PartialEq, Eq)]`
42-
--> $DIR/consts-opaque.rs:57:9
42+
--> $DIR/consts-opaque.rs:53:9
4343
|
4444
LL | BAR => {} // should not be emitting unreachable warning
4545
| ^^^
4646

4747
error: unreachable pattern
48-
--> $DIR/consts-opaque.rs:57:9
48+
--> $DIR/consts-opaque.rs:53:9
4949
|
5050
LL | Bar => {}
5151
| --- matches any value
5252
LL | BAR => {} // should not be emitting unreachable warning
5353
| ^^^ unreachable pattern
5454

5555
error: unreachable pattern
56-
--> $DIR/consts-opaque.rs:60:9
56+
--> $DIR/consts-opaque.rs:56:9
5757
|
5858
LL | Bar => {}
5959
| --- matches any value
@@ -62,19 +62,19 @@ LL | _ => {}
6262
| ^ unreachable pattern
6363

6464
error: to use a constant of type `Bar` in a pattern, `Bar` must be annotated with `#[derive(PartialEq, Eq)]`
65-
--> $DIR/consts-opaque.rs:65:9
65+
--> $DIR/consts-opaque.rs:61:9
6666
|
6767
LL | BAR => {}
6868
| ^^^
6969

7070
error: unreachable pattern
71-
--> $DIR/consts-opaque.rs:67:9
71+
--> $DIR/consts-opaque.rs:63:9
7272
|
7373
LL | Bar => {} // should not be emitting unreachable warning
7474
| ^^^
7575

7676
error: unreachable pattern
77-
--> $DIR/consts-opaque.rs:69:9
77+
--> $DIR/consts-opaque.rs:65:9
7878
|
7979
LL | Bar => {} // should not be emitting unreachable warning
8080
| --- matches any value
@@ -83,76 +83,88 @@ LL | _ => {}
8383
| ^ unreachable pattern
8484

8585
error: to use a constant of type `Bar` in a pattern, `Bar` must be annotated with `#[derive(PartialEq, Eq)]`
86-
--> $DIR/consts-opaque.rs:74:9
86+
--> $DIR/consts-opaque.rs:70:9
8787
|
8888
LL | BAR => {}
8989
| ^^^
9090

9191
error: to use a constant of type `Bar` in a pattern, `Bar` must be annotated with `#[derive(PartialEq, Eq)]`
92-
--> $DIR/consts-opaque.rs:76:9
92+
--> $DIR/consts-opaque.rs:72:9
9393
|
9494
LL | BAR => {} // should not be emitting unreachable warning
9595
| ^^^
9696

9797
error: unreachable pattern
98-
--> $DIR/consts-opaque.rs:76:9
98+
--> $DIR/consts-opaque.rs:72:9
9999
|
100100
LL | BAR => {} // should not be emitting unreachable warning
101101
| ^^^
102102

103103
error: unreachable pattern
104-
--> $DIR/consts-opaque.rs:79:9
104+
--> $DIR/consts-opaque.rs:75:9
105105
|
106106
LL | _ => {} // should not be emitting unreachable warning
107107
| ^
108108

109109
error: to use a constant of type `Baz` in a pattern, `Baz` must be annotated with `#[derive(PartialEq, Eq)]`
110-
--> $DIR/consts-opaque.rs:84:9
110+
--> $DIR/consts-opaque.rs:80:9
111111
|
112112
LL | BAZ => {}
113113
| ^^^
114114

115115
error: unreachable pattern
116-
--> $DIR/consts-opaque.rs:86:9
116+
--> $DIR/consts-opaque.rs:82:9
117117
|
118118
LL | Baz::Baz1 => {} // should not be emitting unreachable warning
119119
| ^^^^^^^^^
120120

121121
error: unreachable pattern
122-
--> $DIR/consts-opaque.rs:88:9
122+
--> $DIR/consts-opaque.rs:84:9
123123
|
124124
LL | _ => {}
125125
| ^
126126

127127
error: to use a constant of type `Baz` in a pattern, `Baz` must be annotated with `#[derive(PartialEq, Eq)]`
128-
--> $DIR/consts-opaque.rs:94:9
128+
--> $DIR/consts-opaque.rs:90:9
129129
|
130130
LL | BAZ => {}
131131
| ^^^
132132

133133
error: unreachable pattern
134-
--> $DIR/consts-opaque.rs:96:9
134+
--> $DIR/consts-opaque.rs:92:9
135135
|
136136
LL | _ => {}
137137
| ^
138138

139139
error: to use a constant of type `Baz` in a pattern, `Baz` must be annotated with `#[derive(PartialEq, Eq)]`
140-
--> $DIR/consts-opaque.rs:101:9
140+
--> $DIR/consts-opaque.rs:97:9
141141
|
142142
LL | BAZ => {}
143143
| ^^^
144144

145145
error: unreachable pattern
146-
--> $DIR/consts-opaque.rs:103:9
146+
--> $DIR/consts-opaque.rs:99:9
147147
|
148148
LL | Baz::Baz2 => {} // should not be emitting unreachable warning
149149
| ^^^^^^^^^
150150

151151
error: unreachable pattern
152-
--> $DIR/consts-opaque.rs:105:9
152+
--> $DIR/consts-opaque.rs:101:9
153153
|
154154
LL | _ => {} // should not be emitting unreachable warning
155155
| ^
156156

157-
error: aborting due to 22 previous errors; 1 warning emitted
157+
error: unreachable pattern
158+
--> $DIR/consts-opaque.rs:127:9
159+
|
160+
LL | WRAPQUUX => {} // detected unreachable because we do inspect the `Wrap` layer
161+
| ^^^^^^^^
162+
163+
error: unreachable pattern
164+
--> $DIR/consts-opaque.rs:141:9
165+
|
166+
LL | WHOKNOWSQUUX => {} // detected unreachable because we do inspect the `WhoKnows` layer
167+
| ^^^^^^^^^^^^
168+
169+
error: aborting due to 24 previous errors; 1 warning emitted
158170

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