70 lines
1.8 KiB
Rust
70 lines
1.8 KiB
Rust
//@ aux-build:enums.rs
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extern crate enums;
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use enums::{EmptyNonExhaustiveEnum, NonExhaustiveEnum};
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fn empty(x: EmptyNonExhaustiveEnum) {
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match x {} //~ ERROR type `EmptyNonExhaustiveEnum` is non-empty
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match x {
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_ => {}, // ok
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}
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}
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fn main() {
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let enum_unit = NonExhaustiveEnum::Unit;
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match enum_unit {
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//~^ ERROR non-exhaustive patterns: `_` not covered [E0004]
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NonExhaustiveEnum::Unit => "first",
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NonExhaustiveEnum::Tuple(_) => "second",
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NonExhaustiveEnum::Struct { .. } => "third"
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};
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match enum_unit {};
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//~^ ERROR non-exhaustive patterns: `_` not covered [E0004]
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// Everything below this is expected to compile successfully.
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let enum_unit = NonExhaustiveEnum::Unit;
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match enum_unit {
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NonExhaustiveEnum::Unit => 1,
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NonExhaustiveEnum::Tuple(_) => 2,
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// This particular arm tests that an enum marked as non-exhaustive
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// will not error if its variants are matched exhaustively.
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NonExhaustiveEnum::Struct { field } => field,
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_ => 0 // no error with wildcard
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};
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match enum_unit {
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_ => "no error with only wildcard"
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};
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// #53549: Check that variant constructors can still be called normally.
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match NonExhaustiveEnum::Unit {
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NonExhaustiveEnum::Unit => {},
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_ => {}
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};
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match NonExhaustiveEnum::Tuple(2) {
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NonExhaustiveEnum::Tuple(2) => {},
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_ => {}
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};
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match (NonExhaustiveEnum::Unit {}) {
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NonExhaustiveEnum::Unit {} => {},
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_ => {}
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};
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match (NonExhaustiveEnum::Tuple { 0: 2 }) {
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NonExhaustiveEnum::Tuple { 0: 2 } => {},
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_ => {}
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};
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match (NonExhaustiveEnum::Struct { field: 2 }) {
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NonExhaustiveEnum::Struct { field: 2 } => {},
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_ => {}
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};
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}
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