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// skip-filecheck
//@ compile-flags: -O -C debuginfo=0 -Zmir-opt-level=2
// Track the status of MIR optimizations simplifying `Ok(res?)` for both the old and new desugarings
// of that syntax.
use std::ops::ControlFlow;
// EMIT_MIR try_identity.new.PreCodegen.after.mir
fn new<T, E>(x: Result<T, E>) -> Result<T, E> {
Ok(
match {
match x {
Ok(v) => ControlFlow::Continue(v),
Err(e) => ControlFlow::Break(e),
}
} {
ControlFlow::Continue(v) => v,
ControlFlow::Break(e) => return Err(e),
},
)
}
// EMIT_MIR try_identity.old.PreCodegen.after.mir
fn old<T, E>(x: Result<T, E>) -> Result<T, E> {
Ok(match x {
Ok(v) => v,
Err(e) => return Err(e),
})
}
fn main() {
let _ = new::<(), ()>(Ok(()));
let _ = old::<(), ()>(Ok(()));
}
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