// In this case, the code should compile and should // succeed at runtime extern mod std; use vec::{head, is_not_empty, last, same_length, zip}; fn enum_chars(start: u8, end: u8) -> ~[char] { assert start < end; let mut i = start; let mut r = ~[]; while i <= end { vec::push(r, i as char); i += 1u as u8; } return r; } fn enum_uints(start: uint, end: uint) -> ~[uint] { assert start < end; let mut i = start; let mut r = ~[]; while i <= end { vec::push(r, i); i += 1u; } return r; } fn main() { let a = 'a' as u8, j = 'j' as u8, k = 1u, l = 10u; let chars = enum_chars(a, j); let ints = enum_uints(k, l); let ps = zip(chars, ints); assert (head(ps) == ('a', 1u)); assert (last(ps) == (j as char, 10u)); }