| //@ run-rustfix |
| #![deny(rust_2021_incompatible_closure_captures)] |
| //~^ NOTE: the lint level is defined here |
| |
| // Test the two possible cases for automated migartion using rustfix |
| // - Closure contains a block i.e. `|| { .. };` |
| // - Closure contains just an expr `|| ..;` |
| |
| #[derive(Debug)] |
| struct Foo(i32); |
| impl Drop for Foo { |
| fn drop(&mut self) { |
| println!("{:?} dropped", self.0); |
| } |
| } |
| |
| fn closure_contains_block() { |
| let t = (Foo(0), Foo(0)); |
| let c = || { |
| //~^ ERROR: drop order |
| //~| NOTE: for more information, see |
| //~| HELP: add a dummy let to cause `t` to be fully captured |
| let _t = t.0; |
| //~^ NOTE: in Rust 2018, this closure captures all of `t`, but in Rust 2021, it will only capture `t.0` |
| }; |
| |
| c(); |
| } |
| //~^ NOTE: in Rust 2018, `t` is dropped here, but in Rust 2021, only `t.0` will be dropped here as part of the closure |
| |
| fn closure_doesnt_contain_block() { |
| let t = (Foo(0), Foo(0)); |
| let c = || t.0; |
| //~^ ERROR: drop order |
| //~| NOTE: in Rust 2018, this closure captures all of `t`, but in Rust 2021, it will only capture `t.0` |
| //~| NOTE: for more information, see |
| //~| HELP: add a dummy let to cause `t` to be fully captured |
| |
| c(); |
| } |
| //~^ NOTE: in Rust 2018, `t` is dropped here, but in Rust 2021, only `t.0` will be dropped here as part of the closure |
| |
| fn main() { |
| closure_contains_block(); |
| closure_doesnt_contain_block(); |
| } |