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|
// run-rustfix
#![deny(rust_2021_incompatible_closure_captures)]
//~^ NOTE: the lint level is defined here
#[derive(Debug)]
struct Foo(i32);
impl Drop for Foo {
fn drop(&mut self) {
println!("{:?} dropped", self.0);
}
}
struct ConstainsDropField(Foo, Foo);
// Test that lint is triggered if a path that implements Drop is not captured by move
fn test_precise_analysis_drop_paths_not_captured_by_move() {
let t = ConstainsDropField(Foo(10), Foo(20));
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`
let _t = &t.1;
};
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
struct S;
impl Drop for S {
fn drop(&mut self) {}
}
struct T(S, S);
struct U(T, T);
// Test precise analysis for the lint works with paths longer than one.
fn test_precise_analysis_long_path_missing() {
let u = U(T(S, S), T(S, S));
let c = || {
//~^ ERROR: drop order
//~| NOTE: for more information, see
//~| HELP: add a dummy let to cause `u` to be fully captured
let _x = u.0.0;
//~^ NOTE: in Rust 2018, this closure captures all of `u`, but in Rust 2021, it will only capture `u.0.0`
let _x = u.0.1;
//~^ NOTE: in Rust 2018, this closure captures all of `u`, but in Rust 2021, it will only capture `u.0.1`
let _x = u.1.0;
//~^ NOTE: in Rust 2018, this closure captures all of `u`, but in Rust 2021, it will only capture `u.1.0`
};
c();
}
//~^ 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
//~| 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
//~| 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
fn main() {
test_precise_analysis_drop_paths_not_captured_by_move();
test_precise_analysis_long_path_missing();
}
|
