leo/tests/pass/parse/mutability/swap.leo
2021-03-03 09:59:24 -08:00

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// Swap two elements of an array.
function swap(mut a: [u32; 2], const i: u32, const j: u32) -> [u32; 2] {
let t = a[i];
a[i] = a[j];
a[j] = t;
return a
}
function main() {
let mut arr: [u32; 2] = [0, 1];
let expected: [u32; 2] = [1, 0];
// Do swap.
let actual = swap(arr, 0, 1);
// Check result.
for i in 0..2 {
console.assert(expected[i] == actual[i]);
}
}