module builtin pub fn (b byte) is_space() bool { mut result := false #result.val = /^\s*$/.test(String.fromCharCode(b)) return result } pub fn (c byte) is_letter() bool { result := false #result.val = (c.val >= `a`.charCodeAt() && c.val <= `z`.charCodeAt()) || (c.val >= `A`.charCodeAt() && c.val <= `Z`.charCodeAt()) return result } pub fn (c byte) str() string { res := '' #res.str = c.val.toString() return res }