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82 lines
2.9 KiB
Rust
82 lines
2.9 KiB
Rust
// This test ensures that or patterns do not allow missing bindings in any of the arms.
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// edition:2018
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#![allow(non_camel_case_types)]
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fn main() {}
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fn check_handling_of_paths() {
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mod bar {
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pub enum foo {
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alpha,
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beta,
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charlie
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}
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}
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use bar::foo::{alpha, charlie};
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let (alpha | beta | charlie) = alpha; //~ ERROR variable `beta` is not bound in all patterns
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match Some(alpha) {
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Some(alpha | beta) => {} //~ ERROR variable `beta` is not bound in all patterns
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}
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}
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fn check_misc_nesting() {
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enum E<T> { A(T, T), B(T) }
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use E::*;
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enum Vars3<S, T, U> { V1(S), V2(T), V3(U) }
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use Vars3::*;
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// One level:
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const X: E<u8> = B(0);
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let (A(a, _) | _) = X; //~ ERROR variable `a` is not bound in all patterns
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let (_ | B(a)) = X; //~ ERROR variable `a` is not bound in all patterns
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let (A(..) | B(a)) = X; //~ ERROR variable `a` is not bound in all patterns
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let (A(a, _) | B(_)) = X; //~ ERROR variable `a` is not bound in all patterns
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let (A(_, a) | B(_)) = X; //~ ERROR variable `a` is not bound in all patterns
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let (A(a, b) | B(a)) = X; //~ ERROR variable `b` is not bound in all patterns
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// Two levels:
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const Y: E<E<u8>> = B(B(0));
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let (A(A(..) | B(_), _) | B(a)) = Y; //~ ERROR variable `a` is not bound in all patterns
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let (A(A(..) | B(a), _) | B(A(a, _) | B(a))) = Y;
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//~^ ERROR variable `a` is not bound in all patterns
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let (A(A(a, b) | B(c), d) | B(e)) = Y;
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//~^ ERROR variable `a` is not bound in all patterns
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//~| ERROR variable `a` is not bound in all patterns
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//~| ERROR variable `b` is not bound in all patterns
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//~| ERROR variable `b` is not bound in all patterns
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//~| ERROR variable `c` is not bound in all patterns
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//~| ERROR variable `c` is not bound in all patterns
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//~| ERROR variable `d` is not bound in all patterns
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//~| ERROR variable `e` is not bound in all patterns
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// Three levels:
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let (
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V1(
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//~^ ERROR variable `b` is not bound in all patterns
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//~| ERROR variable `c` is not bound in all patterns
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A(
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Ok(a) | Err(_), //~ ERROR variable `a` is not bound in all patterns
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_
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) |
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B(Ok(a) | Err(a))
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) |
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V2(
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A(
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A(_, a) | //~ ERROR variable `b` is not bound in all patterns
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B(b), //~ ERROR variable `a` is not bound in all patterns
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_
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) |
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B(_)
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//~^ ERROR variable `a` is not bound in all patterns
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//~| ERROR variable `b` is not bound in all patterns
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) |
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V3(c),
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//~^ ERROR variable `a` is not bound in all patterns
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)
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: (Vars3<E<Result<u8, u8>>, E<E<u8>>, u8>,)
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= (V3(0),);
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}
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