An array without a fixed length was pattern-matched.
Example of erroneous code:
#![feature(const_generics)] fn is_123<const N: usize>(x: [u32; N]) -> bool { match x { [1, 2, 3] => true, // error: cannot pattern-match on an // array without a fixed length _ => false } }
Ensure that the pattern is consistent with the size of the matched array. Additional elements can be matched with ..
:
#![feature(slice_patterns)] let r = &[1, 2, 3, 4]; match r { &[a, b, ..] => { // ok! println!("a={}, b={}", a, b); } }