mirror of https://github.com/rust-lang/rust
36 lines
935 B
Rust
36 lines
935 B
Rust
//@ run-pass
|
|
// Regression test for broken MIR error (#61442)
|
|
// Due to the two possible evaluation orders for
|
|
// a '+=' expression (depending on whether or not the 'AddAssign' trait
|
|
// is being used), we were failing to account for all types that might
|
|
// possibly be live across a yield point.
|
|
|
|
#![feature(coroutines, stmt_expr_attributes)]
|
|
|
|
fn foo() {
|
|
let _x = #[coroutine] static || {
|
|
let mut s = String::new();
|
|
s += { yield; "" };
|
|
};
|
|
|
|
let _y = #[coroutine] static || {
|
|
let x = &mut 0;
|
|
*{ yield; x } += match String::new() { _ => 0 };
|
|
};
|
|
|
|
// Please don't ever actually write something like this
|
|
let _z = #[coroutine] static || {
|
|
let x = &mut 0;
|
|
*{
|
|
let inner = &mut 1;
|
|
*{ yield (); inner } += match String::new() { _ => 1};
|
|
yield;
|
|
x
|
|
} += match String::new() { _ => 2 };
|
|
};
|
|
}
|
|
|
|
fn main() {
|
|
foo()
|
|
}
|