no_viable_alt_for_char_exception.sa

来自「Java写的词法/语法分析器。可生成JAVA语言或者是C++的词法和语法分析器。」· SA 代码 · 共 43 行

(* 

  ANTLR Translator Generator
  Project led by Terence Parr at http://www.jGuru.com
  Software rights: http://www.antlr.org/RIGHTS.html
 
  $Id: //depot/code/org.antlr/release/antlr-2.7.0/lib/sather/Antlr/no_viable_alt_for_char_exception.sa#1 $

*)

class ANTLR_NO_VIABLE_ALT_FOR_CHAR_EXCEPTION < $ANTLR_RECOGNITION_EXCEPTION is

   include ANTLR_RECOGNITION_EXCEPTION str -> super_str;

   attr found_char : CHAR;

   create ( c : CHAR, scanner : $ANTLR_FILE_CURSOR ) : SAME is
      res : SAME := #SAME("NoViableAlt");
      res.found_char := c;
      res.line := scanner.line;
      res.file_name := scanner.file_name;
      return res;
   end;

   create ( c : CHAR, file_name : STR , line : INT ) : SAME is
      res : SAME := #SAME("NoViableAlt");
      res.found_char := c;
      res.line := line;
      res.file_name := file_name;
      return res;
   end;

   -- Returns a clean error message (no line number/column information)
   message : STR is
      return "unexpected char: " + found_char;
   end;
   
   str : STR is
      return file_line_str + message;
   end;

end;