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