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resolve: add test for missing bindings in or-patterns.
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‎src/test/ui/or-patterns/missing-bindings.rs

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// 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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#![feature(or_patterns)]
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#![allow(incomplete_features, 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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}

‎src/test/ui/or-patterns/missing-bindings.stderr

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error[E0408]: variable `beta` is not bound in all patterns
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--> $DIR/missing-bindings.rs:20:9
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|
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LL | let alpha | beta | charlie = alpha;
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| ^^^^^ ---- ^^^^^^^ pattern doesn't bind `beta`
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| | |
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| | variable not in all patterns
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| pattern doesn't bind `beta`
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error[E0408]: variable `beta` is not bound in all patterns
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--> $DIR/missing-bindings.rs:22:14
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|
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LL | Some(alpha | beta) => {}
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| ^^^^^ ---- variable not in all patterns
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| |
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| pattern doesn't bind `beta`
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error[E0408]: variable `a` is not bound in all patterns
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--> $DIR/missing-bindings.rs:34:19
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|
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LL | let A(a, _) | _ = X;
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| - ^ pattern doesn't bind `a`
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| |
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| variable not in all patterns
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error[E0408]: variable `a` is not bound in all patterns
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--> $DIR/missing-bindings.rs:35:9
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|
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LL | let _ | B(a) = X;
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| ^ - variable not in all patterns
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| |
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| pattern doesn't bind `a`
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error[E0408]: variable `a` is not bound in all patterns
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--> $DIR/missing-bindings.rs:36:9
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|
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LL | let A(..) | B(a) = X;
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| ^^^^^ - variable not in all patterns
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| |
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| pattern doesn't bind `a`
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error[E0408]: variable `a` is not bound in all patterns
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--> $DIR/missing-bindings.rs:37:19
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|
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LL | let A(a, _) | B(_) = X;
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| - ^^^^ pattern doesn't bind `a`
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| |
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| variable not in all patterns
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error[E0408]: variable `a` is not bound in all patterns
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--> $DIR/missing-bindings.rs:38:19
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|
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LL | let A(_, a) | B(_) = X;
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| - ^^^^ pattern doesn't bind `a`
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| |
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| variable not in all patterns
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error[E0408]: variable `b` is not bound in all patterns
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--> $DIR/missing-bindings.rs:39:19
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|
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LL | let A(a, b) | B(a) = X;
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| - ^^^^ pattern doesn't bind `b`
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| |
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| variable not in all patterns
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error[E0408]: variable `a` is not bound in all patterns
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--> $DIR/missing-bindings.rs:43:9
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|
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LL | let A(A(..) | B(_), _) | B(a) = Y;
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| ^^^^^^^^^^^^^^^^^^ - variable not in all patterns
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| |
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| pattern doesn't bind `a`
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error[E0408]: variable `a` is not bound in all patterns
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--> $DIR/missing-bindings.rs:44:11
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|
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LL | let A(A(..) | B(a), _) | B(A(a, _) | B(a)) = Y;
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| ^^^^^ - variable not in all patterns
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| |
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| pattern doesn't bind `a`
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error[E0408]: variable `a` is not bound in all patterns
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--> $DIR/missing-bindings.rs:46:21
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|
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LL | let A(A(a, b) | B(c), d) | B(e) = Y;
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| - ^^^^ pattern doesn't bind `a`
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| |
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| variable not in all patterns
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error[E0408]: variable `b` is not bound in all patterns
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--> $DIR/missing-bindings.rs:46:21
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|
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LL | let A(A(a, b) | B(c), d) | B(e) = Y;
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| - ^^^^ pattern doesn't bind `b`
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| |
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| variable not in all patterns
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error[E0408]: variable `c` is not bound in all patterns
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--> $DIR/missing-bindings.rs:46:11
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|
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LL | let A(A(a, b) | B(c), d) | B(e) = Y;
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| ^^^^^^^ - variable not in all patterns
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| |
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| pattern doesn't bind `c`
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error[E0408]: variable `a` is not bound in all patterns
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--> $DIR/missing-bindings.rs:46:32
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|
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LL | let A(A(a, b) | B(c), d) | B(e) = Y;
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| - ^^^^ pattern doesn't bind `a`
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| |
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| variable not in all patterns
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error[E0408]: variable `b` is not bound in all patterns
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--> $DIR/missing-bindings.rs:46:32
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|
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LL | let A(A(a, b) | B(c), d) | B(e) = Y;
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| - ^^^^ pattern doesn't bind `b`
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| |
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| variable not in all patterns
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error[E0408]: variable `c` is not bound in all patterns
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--> $DIR/missing-bindings.rs:46:32
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|
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LL | let A(A(a, b) | B(c), d) | B(e) = Y;
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| - ^^^^ pattern doesn't bind `c`
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| |
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| variable not in all patterns
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error[E0408]: variable `d` is not bound in all patterns
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--> $DIR/missing-bindings.rs:46:32
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|
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LL | let A(A(a, b) | B(c), d) | B(e) = Y;
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| - ^^^^ pattern doesn't bind `d`
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| |
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| variable not in all patterns
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error[E0408]: variable `e` is not bound in all patterns
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--> $DIR/missing-bindings.rs:46:9
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|
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LL | let A(A(a, b) | B(c), d) | B(e) = Y;
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| ^^^^^^^^^^^^^^^^^^^^ - variable not in all patterns
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| |
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| pattern doesn't bind `e`
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error[E0408]: variable `a` is not bound in all patterns
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--> $DIR/missing-bindings.rs:62:29
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|
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LL | Ok(a) | Err(_),
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| - ^^^^^^ pattern doesn't bind `a`
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| |
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| variable not in all patterns
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error[E0408]: variable `a` is not bound in all patterns
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--> $DIR/missing-bindings.rs:70:21
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|
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LL | A(_, a) |
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| - variable not in all patterns
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LL | B(b),
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| ^^^^ pattern doesn't bind `a`
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error[E0408]: variable `b` is not bound in all patterns
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--> $DIR/missing-bindings.rs:69:21
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|
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LL | A(_, a) |
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| ^^^^^^^ pattern doesn't bind `b`
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LL | B(b),
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| - variable not in all patterns
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error[E0408]: variable `a` is not bound in all patterns
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--> $DIR/missing-bindings.rs:73:17
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|
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LL | A(_, a) |
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| - variable not in all patterns
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...
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LL | B(_)
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| ^^^^ pattern doesn't bind `a`
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error[E0408]: variable `b` is not bound in all patterns
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--> $DIR/missing-bindings.rs:73:17
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|
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LL | B(b),
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| - variable not in all patterns
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...
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LL | B(_)
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| ^^^^ pattern doesn't bind `b`
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error[E0408]: variable `a` is not bound in all patterns
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--> $DIR/missing-bindings.rs:77:13
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|
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LL | B(Ok(a) | Err(a))
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| - variable not in all patterns
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...
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LL | A(_, a) |
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| - variable not in all patterns
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...
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LL | V3(c),
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| ^^^^^ pattern doesn't bind `a`
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error[E0408]: variable `b` is not bound in all patterns
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--> $DIR/missing-bindings.rs:58:13
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|
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LL | / V1(
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LL | |
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LL | |
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LL | | A(
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... |
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LL | | B(Ok(a) | Err(a))
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LL | | ) |
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| |_____________^ pattern doesn't bind `b`
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...
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LL | B(b),
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| - variable not in all patterns
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...
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LL | V3(c),
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| ^^^^^ pattern doesn't bind `b`
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error[E0408]: variable `c` is not bound in all patterns
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--> $DIR/missing-bindings.rs:58:13
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|
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LL | / V1(
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LL | |
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LL | |
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LL | | A(
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... |
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LL | | B(Ok(a) | Err(a))
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LL | | ) |
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| |_____________^ pattern doesn't bind `c`
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LL | / V2(
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LL | | A(
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LL | | A(_, a) |
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LL | | B(b),
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... |
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LL | |
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LL | | ) |
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| |_____________^ pattern doesn't bind `c`
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LL | V3(c),
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| - variable not in all patterns
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error: aborting due to 26 previous errors
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For more information about this error, try `rustc --explain E0408`.

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