blob: 358e9d034c474e79faae55a068e900a3c394a003 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
// Test some cases where or-patterns may ostensibly be allowed but are in fact not.
// This is not a semantic test. We only test parsing.
fn main() {}
enum E { A, B }
use E::*;
fn no_top_level_or_patterns() {
// We do *not* allow or-patterns at the top level of lambdas...
let _ = |A | B: E| (); //~ ERROR no implementation for `E | ()`
// -------- This looks like an or-pattern but is in fact `|A| (B: E | ())`.
// ...and for now neither do we allow or-patterns at the top level of functions.
fn fun1(A | B: E) {}
//~^ ERROR top-level or-patterns are not allowed
fn fun2(| A | B: E) {}
//~^ ERROR top-level or-patterns are not allowed
// We don't allow top-level or-patterns before type annotation in let-statements because we
// want to reserve this syntactic space for possible future type ascription.
let A | B: E = A;
//~^ ERROR top-level or-patterns are not allowed
let | A | B: E = A;
//~^ ERROR top-level or-patterns are not allowed
let (A | B): E = A; // ok -- wrapped in parens
}
|
