Function hangeul::is_choseong

pub fn is_choseong(code: u32) -> bool

Checks if a char is a lead jamo, or choseong (중성).

use hangeul::is_choseong; //is_lead

assert_eq!(true, is_choseong('ㅉ' as u32));
assert_eq!(false, is_choseong('ㅏ' as u32));
assert_eq!(false, is_choseong('ㄵ' as u32));