diff options
Diffstat (limited to 'src/test/ui/closures/2229_closure_analysis/match/patterns-capture-analysis.rs')
-rw-r--r-- | src/test/ui/closures/2229_closure_analysis/match/patterns-capture-analysis.rs | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/src/test/ui/closures/2229_closure_analysis/match/patterns-capture-analysis.rs b/src/test/ui/closures/2229_closure_analysis/match/patterns-capture-analysis.rs new file mode 100644 index 000000000..56f5ac44d --- /dev/null +++ b/src/test/ui/closures/2229_closure_analysis/match/patterns-capture-analysis.rs @@ -0,0 +1,137 @@ +// edition:2021 + +#![feature(rustc_attrs)] + +// Should capture the discriminant since a variant of a multivariant enum is +// mentioned in the match arm; the discriminant is captured by the closure regardless +// of if it creates a binding +fn test_1_should_capture() { + let variant = Some(2229); + let c = #[rustc_capture_analysis] + //~^ ERROR: attributes on expressions are experimental + //~| NOTE: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> + + || { + //~^ First Pass analysis includes: + //~| Min Capture analysis includes: + match variant { + //~^ NOTE: Capturing variant[] -> ImmBorrow + //~| NOTE: Min Capture variant[] -> ImmBorrow + Some(_) => {} + _ => {} + } + }; + c(); +} + +// Should not capture the discriminant since only a wildcard is mentioned in the +// match arm +fn test_2_should_not_capture() { + let variant = Some(2229); + let c = #[rustc_capture_analysis] + //~^ ERROR: attributes on expressions are experimental + //~| NOTE: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> + || { + //~^ First Pass analysis includes: + match variant { + _ => {} + } + }; + c(); +} + +// Testing single variant patterns +enum SingleVariant { + Points(u32) +} + +// Should not capture the discriminant since the single variant mentioned +// in the match arm does not trigger a binding +fn test_3_should_not_capture_single_variant() { + let variant = SingleVariant::Points(1); + let c = #[rustc_capture_analysis] + //~^ ERROR: attributes on expressions are experimental + //~| NOTE: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> + || { + //~^ First Pass analysis includes: + match variant { + SingleVariant::Points(_) => {} + } + }; + c(); +} + +// Should not capture the discriminant since the single variant mentioned +// in the match arm does not trigger a binding +fn test_6_should_capture_single_variant() { + let variant = SingleVariant::Points(1); + let c = #[rustc_capture_analysis] + //~^ ERROR: attributes on expressions are experimental + //~| NOTE: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> + || { + //~^ First Pass analysis includes: + //~| Min Capture analysis includes: + match variant { + //~^ NOTE: Capturing variant[] -> ImmBorrow + //~| NOTE: Capturing variant[(0, 0)] -> ImmBorrow + //~| NOTE: Min Capture variant[] -> ImmBorrow + SingleVariant::Points(a) => { + println!("{:?}", a); + } + } + }; + c(); +} + +// Should not capture the discriminant since only wildcards are mentioned in the +// match arm +fn test_4_should_not_capture_array() { + let array: [i32; 3] = [0; 3]; + let c = #[rustc_capture_analysis] + //~^ ERROR: attributes on expressions are experimental + //~| NOTE: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> + || { + //~^ First Pass analysis includes: + match array { + [_,_,_] => {} + } + }; + c(); +} + +// Testing MultiVariant patterns +enum MVariant { + A, + B, + C, +} + +// Should capture the discriminant since a variant of the multi variant enum is +// mentioned in the match arm; the discriminant is captured by the closure +// regardless of if it creates a binding +fn test_5_should_capture_multi_variant() { + let variant = MVariant::A; + let c = #[rustc_capture_analysis] + //~^ ERROR: attributes on expressions are experimental + //~| NOTE: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> + || { + //~^ First Pass analysis includes: + //~| Min Capture analysis includes: + match variant { + //~^ NOTE: Capturing variant[] -> ImmBorrow + //~| NOTE: Min Capture variant[] -> ImmBorrow + MVariant::A => {} + _ => {} + } + }; + c(); +} + +fn main() { + test_1_should_capture(); + test_2_should_not_capture(); + test_3_should_not_capture_single_variant(); + test_6_should_capture_single_variant(); + test_4_should_not_capture_array(); + test_5_should_capture_multi_variant(); +} |