Error code E0528
An array or slice pattern required more elements than were present in the matched array.
Example of erroneous code:
#![allow(unused)] fn main() { let r = &[1, 2]; match r { &[a, b, c, rest @ ..] => { // error: pattern requires at least 3 // elements but array has 2 println!("a={}, b={}, c={} rest={:?}", a, b, c, rest); } } }
Ensure that the matched array has at least as many elements as the pattern
requires. You can match an arbitrary number of remaining elements with ..
:
#![allow(unused)] fn main() { let r = &[1, 2, 3, 4, 5]; match r { &[a, b, c, rest @ ..] => { // ok! // prints `a=1, b=2, c=3 rest=[4, 5]` println!("a={}, b={}, c={} rest={:?}", a, b, c, rest); } } }