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