mirror of https://github.com/rust-lang/rust
70 lines
2.2 KiB
Rust
70 lines
2.2 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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#[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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struct ConstainsDropField(Foo, Foo);
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// Test that lint is triggered if a path that implements Drop is not captured by move
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fn test_precise_analysis_drop_paths_not_captured_by_move() {
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let t = ConstainsDropField(Foo(10), Foo(20));
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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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let _t = &t.1;
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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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struct S;
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impl Drop for S {
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fn drop(&mut self) {}
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}
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struct T(S, S);
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struct U(T, T);
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// Test precise analysis for the lint works with paths longer than one.
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fn test_precise_analysis_long_path_missing() {
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let u = U(T(S, S), T(S, S));
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let c = || {
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let _ = &u;
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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 `u` to be fully captured
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let _x = u.0.0;
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//~^ NOTE: in Rust 2018, this closure captures all of `u`, but in Rust 2021, it will only capture `u.0.0`
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let _x = u.0.1;
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//~^ NOTE: in Rust 2018, this closure captures all of `u`, but in Rust 2021, it will only capture `u.0.1`
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let _x = u.1.0;
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//~^ NOTE: in Rust 2018, this closure captures all of `u`, but in Rust 2021, it will only capture `u.1.0`
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};
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c();
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}
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//~^ NOTE: in Rust 2018, `u` is dropped here, but in Rust 2021, only `u.0.0` will be dropped here as part of the closure
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//~| NOTE: in Rust 2018, `u` is dropped here, but in Rust 2021, only `u.0.1` will be dropped here as part of the closure
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//~| NOTE: in Rust 2018, `u` is dropped here, but in Rust 2021, only `u.1.0` will be dropped here as part of the closure
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fn main() {
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test_precise_analysis_drop_paths_not_captured_by_move();
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test_precise_analysis_long_path_missing();
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}
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