RuneIterValue :: struct {
    rune: i32;
    bytes: [] u8;
}

advance_rune :: (s: [] u8, n: i32) -> [] u8

advance_rune :: (s: &[] u8, n: i32) -> void

append_rune :: (s: &[..] u8, r: i32) -> [] u8

decode_last_rune :: (s: [] u8) -> (i32, i32)

decode_rune :: (s: [] u8) -> (i32, i32)

encode_rune :: (buffer: [] u8, r: i32) -> [] u8

full_rune :: (buffer: [] u8) -> bool

next_rune :: (s: [] u8) -> [] u8

rune_count :: (s: [] u8) -> i32

rune_is_start :: (b: u8) -> bool

rune_length :: (r: i32) -> i32

rune_length_from_first_byte :: (b: u8) -> i32

runes :: (s: [] u8) -> Iterator(RuneIterValue)

slice :: (s: [] u8, low: i32, high: i32) -> [] u8