mirror of https://github.com/rust-lang/rust
52 lines
1.0 KiB
Rust
52 lines
1.0 KiB
Rust
//@ check-pass
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// Test `Copy` bindings in the rhs of `@` patterns.
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#![allow(dropping_copy_types)]
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#[derive(Copy, Clone)]
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struct C;
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fn mk_c() -> C { C }
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#[derive(Copy, Clone)]
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struct P<A, B>(A, B);
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enum E<A, B> { L(A), R(B) }
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fn main() {
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let a @ b @ c @ d = C;
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let a @ (b, c) = (C, mk_c());
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let a @ P(b, P(c, d)) = P(mk_c(), P(C, C));
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let a @ [b, c] = [C, C];
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let a @ [b, .., c] = [C, mk_c(), C];
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let a @ [b, mid @ .., c] = [C, mk_c(), C];
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let a @ &(b, c) = &(C, C);
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let a @ &(b, &P(c, d)) = &(mk_c(), &P(C, C));
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fn foo(a @ [b, mid @ .., c]: [C; 3]) {}
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use self::E::*;
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match L(C) {
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L(a) | R(a) => {
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let a: C = a;
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drop(a);
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drop(a);
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}
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}
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match R(&L(&mk_c())) {
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L(L(&a)) | L(R(&a)) | R(L(&a)) | R(R(&a)) => {
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let a: C = a;
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drop(a);
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drop(a);
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}
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}
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match Ok(mk_c()) {
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Ok(ref a @ b) | Err(b @ ref a) => {
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let _: &C = a;
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let _: C = b;
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}
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}
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}
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