File: old-closure-arg-call-as.rs

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rustc 1.70.0%2Bdfsg1-9
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// run-pass

#![allow(non_snake_case)]

fn asBlock<F>(f: F) -> usize where F: FnOnce() -> usize {
   return f();
}

pub fn main() {
   let x = asBlock(|| 22);
   assert_eq!(x, 22);
}