mirror of https://github.com/rust-lang/rust
55 lines
1.8 KiB
Rust
55 lines
1.8 KiB
Rust
//@ edition:2021
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//@ aux-build:match_non_exhaustive_lib.rs
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/* The error message for non-exhaustive matches on non-local enums
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* marked as non-exhaustive should mention the fact that the enum
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* is marked as non-exhaustive (issue #85227).
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*/
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// Ignore non_exhaustive in the same crate
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#[non_exhaustive]
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enum L1 { A, B }
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enum L2 { C }
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extern crate match_non_exhaustive_lib;
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use match_non_exhaustive_lib::{E1, E2, E3, E4};
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fn foo() -> (L1, L2) {todo!()}
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fn bar() -> (E1, E2, E3, E4) {todo!()}
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fn main() {
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let (l1, l2) = foo();
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// No error for enums defined in this crate
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let _a = || { match l1 { L1::A => (), L1::B => () } };
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// (except if the match is already non-exhaustive)
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let _b = || { match l1 { L1::A => () } };
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//~^ ERROR: non-exhaustive patterns: `L1::B` not covered [E0004]
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// l2 should not be captured as it is a non-exhaustive SingleVariant
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// defined in this crate
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let _c = || { match l2 { L2::C => (), _ => () } };
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let mut mut_l2 = l2;
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_c();
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// E1 is not visibly uninhabited from here
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let (e1, e2, e3, e4) = bar();
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let _d = || { match e1 {} };
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//~^ ERROR: non-exhaustive patterns: type `E1` is non-empty [E0004]
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let _e = || { match e2 { E2::A => (), E2::B => () } };
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//~^ ERROR: non-exhaustive patterns: `_` not covered [E0004]
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let _f = || { match e2 { E2::A => (), E2::B => (), _ => () } };
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// e3 should be captured as it is a non-exhaustive SingleVariant
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// defined in another crate
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let _g = || { match e3 { E3::C => (), _ => () } };
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let mut mut_e3 = e3;
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//~^ ERROR: cannot move out of `e3` because it is borrowed
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_g();
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// e4 should not be captured as it is a SingleVariant
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let _h = || { match e4 { E4::D => (), _ => () } };
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let mut mut_e4 = e4;
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_h();
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}
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