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// 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 = || {
let _ = &t;
//~^ 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 = || { let _ = &t; 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();
}
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