pattern
| Library: UTF-8 (OMUTF8) Import : omutf8.xmd | 
export switch function 
      char overlong-handling value error-handling-type overlong-handling optional
    
 The function utf8.char matches UTF-8 encoded characters in its #current-input. By default, or if the overlong-handling variable is specified as not-allowed, it matches only the shortest possible encoding, and overlong values are not matched. If the argument is specified as not-allowed-with-throw, an overlong value will trigger a throw of the  utf8.overlong-sequence exception.
      
 The following program converts a UTF-8 encoded file to a long character encoding (2 bytes for every character):
        
import "omutf8.xmd" prefixed by utf8. process submit #main-input find utf8.char => char output "2f0b" % utf8.code-point of char