51 

    51 #define FIRST_(symbol1, symbol2) (((symbol1)->first_order < (symbol2)->first_order)   ? (symbol1) : (symbol2))

    52 #define  LAST_(symbol1, symbol2) (((symbol1)->last_order  > (symbol2)->last_order)    ? (symbol1) : (symbol2))

    53 #include <stdarg.h>

    54 

    55 void stage4err(const char *stage4_generator_id, symbol_c *symbol1, symbol_c *symbol2, const char *errmsg, ...) {

    56     va_list argptr;

    57     va_start(argptr, errmsg); /* second argument is last fixed pamater of stage4err() */

    58 

    59     fprintf(stderr, "%s:%d-%d..%d-%d: error %s: ",

    60             FIRST_(symbol1,symbol2)->first_file, FIRST_(symbol1,symbol2)->first_line, FIRST_(symbol1,symbol2)->first_column,

    61                                                  LAST_(symbol1,symbol2) ->last_line,  LAST_(symbol1,symbol2) ->last_column,

    62             stage4_generator_id);

    63     vfprintf(stderr, errmsg, argptr);

    64     fprintf(stderr, "\n");

    65     // error_count++;

    66     va_end(argptr);

    67 }