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// run-pass
// Set of test cases that don't need migrations
#![deny(rust_2021_incompatible_closure_captures)]
// Copy types as copied by the closure instead of being moved into the closure
// Therefore their drop order isn't tied to the closure and won't be requiring any
// migrations.
fn test1_only_copy_types() {
let t = (0i32, 0i32);
let c = || {
let _t = t.0;
};
c();
}
// Same as test1 but using a move closure
fn test2_only_copy_types_move_closure() {
let t = (0i32, 0i32);
let c = move || {
println!("{}", t.0);
};
c();
}
// Don't need to migrate if captured by ref
fn test3_only_copy_types_move_closure() {
let t = (String::new(), String::new());
let c = || {
println!("{}", t.0);
};
c();
}
// Test migration analysis in case of Insignificant Drop + Non Drop aggregates.
// Note in this test the closure captures a non Drop type and therefore the variable
// is only captured by ref.
fn test4_insignificant_drop_non_drop_aggregate() {
let t = (String::new(), 0i32);
let c = || {
let _t = t.1;
};
c();
}
struct Foo(i32);
impl Drop for Foo {
fn drop(&mut self) {
println!("{:?} dropped", self.0);
}
}
// Test migration analysis in case of Significant Drop + Non Drop aggregates.
// Note in this test the closure captures a non Drop type and therefore the variable
// is only captured by ref.
fn test5_significant_drop_non_drop_aggregate() {
let t = (Foo(0), 0i32);
let c = || {
let _t = t.1;
};
c();
}
fn main() {
test1_only_copy_types();
test2_only_copy_types_move_closure();
test3_only_copy_types_move_closure();
test4_insignificant_drop_non_drop_aggregate();
test5_significant_drop_non_drop_aggregate();
}
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