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