mirror of https://github.com/rust-lang/rust
74 lines
1.5 KiB
Rust
74 lines
1.5 KiB
Rust
// Here we test that `..` is allowed in all pattern locations *syntactically*.
|
|
// The semantic test is in `rest-pat-semantic-disallowed.rs`.
|
|
|
|
//@ check-pass
|
|
|
|
fn main() {}
|
|
|
|
macro_rules! accept_pat {
|
|
($p:pat) => {}
|
|
}
|
|
|
|
accept_pat!(..);
|
|
|
|
#[cfg(FALSE)]
|
|
fn rest_patterns() {
|
|
// Top level:
|
|
fn foo(..: u8) {}
|
|
let ..;
|
|
|
|
// Box patterns:
|
|
let box ..;
|
|
//~^ WARN box pattern syntax is experimental
|
|
//~| WARN unstable syntax
|
|
|
|
// In or-patterns:
|
|
match x {
|
|
.. | .. => {}
|
|
}
|
|
|
|
// Ref patterns:
|
|
let &..;
|
|
let &mut ..;
|
|
|
|
// Ident patterns:
|
|
let x @ ..;
|
|
let ref x @ ..;
|
|
let ref mut x @ ..;
|
|
|
|
// Tuple:
|
|
let (..); // This is interpreted as a tuple pattern, not a parenthesis one.
|
|
let (..,); // Allowing trailing comma.
|
|
let (.., .., ..); // Duplicates also.
|
|
let (.., P, ..); // Including with things in between.
|
|
|
|
// Tuple struct (same idea as for tuple patterns):
|
|
let A(..);
|
|
let A(..,);
|
|
let A(.., .., ..);
|
|
let A(.., P, ..);
|
|
|
|
// Array/Slice (like with tuple patterns):
|
|
let [..];
|
|
let [..,];
|
|
let [.., .., ..];
|
|
let [.., P, ..];
|
|
|
|
// Random walk to guard against special casing:
|
|
match x {
|
|
.. |
|
|
[
|
|
(
|
|
box .., //~ WARN box pattern syntax is experimental
|
|
&(..),
|
|
&mut ..,
|
|
x @ ..
|
|
),
|
|
ref x @ ..,
|
|
] |
|
|
ref mut x @ ..
|
|
=> {}
|
|
}
|
|
//~| WARN unstable syntax
|
|
}
|