main.c

#include "prettyerr.h"
#include <stdio.h>

#ifdef __attribute__
#undef __attribute__
#endif
#ifndef __GNUC__
#define __attribute__(...) /* nothing */
#endif

#define NUSED __attribute__((unused))

#define FILENAME    "faux.gw"
#define _ERROR_CODE 42
#define ERROR_CODE  "E0042"

const char src[] = "int main() {\n  42 => const int owo;\n 12 => owo;\n}";

int main(int argc NUSED, const char *argv[] NUSED) {
  // Initialize the error printer
  perr_printer_t printer;
  perr_printer_init(&printer, stderr /* our stream is standard error */,
                    src /* source code */, true /* use utf8 */,
                    perr_runner_basic_style /* basic style*/
  );

  /* uncomment this to get rounded corners */
  // printer.rounded = true;

  // Create a faux error
  const perr_t err = PERR_Error(
      PERR_ERROR /* error */, PERR_Str(3, src + 25) /* location of error */,
      PERR_Pos(40, 2) /* occurs at src[40] through src[41] */,
      "Invalid assignement" /* main error message */,
      "`{+/}owo{0}` is immutable" /* example explanatory error message */,
      "Take a reference to `{+/}owo{0}{-}` and mutate that 😄" /* fix message */,
      _ERROR_CODE, /* error code */
      FILENAME     /* filename */
  );

  // Create a faux "secondary-style" error
  const perr_t sec = PERR_Secondary(
      PERR_WARNING /* error */, PERR_Str(2, src + 15) /* location of error */,
      PERR_Pos(21, 5) /* occurs at src[21] through src[25] */,
      "`{+/}owo{0}` declared `{+/}const{0}` here" /* main error message */,
      "See {/+}https:/gwion.github.io/errors/" ERROR_CODE
      "{0}{-} for more information on this error, "
      " or use `{+/}gwion --explain=" ERROR_CODE "{0}`",
      FILENAME /* filename */
  );

  // Display our error
  perr_print_error(&printer, &err);
  printer.runner = perr_runner_secondary_style;
  perr_print_error(&printer, &sec);

  return 0;
}