// run-pass | |
fn pairs<F>(mut it: F) where F: FnMut((isize, isize)) { | |
let mut i: isize = 0; | |
let mut j: isize = 0; | |
while i < 10 { it((i, j)); i += 1; j += i; } | |
} | |
pub fn main() { | |
let mut i: isize = 10; | |
let mut j: isize = 0; | |
pairs(|p| { | |
let (_0, _1) = p; | |
println!("{}", _0); | |
println!("{}", _1); | |
assert_eq!(_0 + 10, i); | |
i += 1; | |
j = _1; | |
}); | |
assert_eq!(j, 45); | |
} |