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|
// 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
}
|
