ifstream.sa

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。并可产生语法分析树和对该树进行遍历

class IFSTREAM < $ISTREAM is

   include FILE open_for_read -> FILE_open_for_read;

   get : CHAR is
      return get_char;
   end;

   const eof_char : CHAR := '\377';

   open_for_read ( file_name : STR ) : SAME is
      file : SAME := FILE_open_for_read( file_name );
      if ( void(file.fp) ) then
	 return void
      end;
      return file;
   end;

end;