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//@ build-pass
// A test to ensure coroutines capture values that were conditionally dropped,
// and also that values that are dropped along all paths to a yield do not get
// included in the coroutine type.
#![feature(coroutines, negative_impls, stmt_expr_attributes)]
#![allow(unused_assignments, dead_code)]
struct Ptr;
impl<'a> Drop for Ptr {
fn drop(&mut self) {}
}
struct NonSend;
impl !Send for NonSend {}
fn assert_send<T: Send>(_: T) {}
// This test case is reduced from tests/ui/drop/dynamic-drop-async.rs
fn one_armed_if(arg: bool) {
let _ = #[coroutine] || {
let arr = [Ptr];
if arg {
drop(arr);
}
yield;
};
}
fn two_armed_if(arg: bool) {
assert_send(#[coroutine] || {
let arr = [Ptr];
if arg {
drop(arr);
} else {
drop(arr);
}
yield;
})
}
fn if_let(arg: Option<i32>) {
let _ = #[coroutine] || {
let arr = [Ptr];
if let Some(_) = arg {
drop(arr);
}
yield;
};
}
fn init_in_if(arg: bool) {
assert_send(#[coroutine] || {
let mut x = NonSend;
drop(x);
if arg {
x = NonSend;
} else {
yield;
}
})
}
fn init_in_match_arm(arg: Option<i32>) {
assert_send(#[coroutine] || {
let mut x = NonSend;
drop(x);
match arg {
Some(_) => x = NonSend,
None => yield,
}
})
}
fn reinit() {
let _ = #[coroutine] || {
let mut arr = [Ptr];
drop(arr);
arr = [Ptr];
yield;
};
}
fn loop_uninit() {
let _ = #[coroutine] || {
let mut arr = [Ptr];
let mut count = 0;
drop(arr);
while count < 3 {
yield;
arr = [Ptr];
count += 1;
}
};
}
fn nested_loop() {
let _ = #[coroutine] || {
let mut arr = [Ptr];
let mut count = 0;
drop(arr);
while count < 3 {
for _ in 0..3 {
yield;
}
arr = [Ptr];
count += 1;
}
};
}
fn loop_continue(b: bool) {
let _ = #[coroutine] || {
let mut arr = [Ptr];
let mut count = 0;
drop(arr);
while count < 3 {
count += 1;
yield;
if b {
arr = [Ptr];
continue;
}
}
};
}
fn main() {
one_armed_if(true);
if_let(Some(41));
init_in_if(true);
init_in_match_arm(Some(41));
reinit();
loop_uninit();
nested_loop();
loop_continue(true);
}
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