sandbox/bugs/neighbor.c

    foreach_neighbor() is not properly nested

    scalar a[];

int main()
{
  init_grid (1);
  scalar * interfaces = {a};
  foreach() {

    This works…

        foreach_neighbor() {
      for (scalar s in interfaces)
	fprintf (stderr, "a %g %g\n", x, y);
    }

    … but this doesn’t

        foreach_neighbor()
      for (scalar s in interfaces)
	fprintf (stderr, "b %g %g\n", x, y);
  }
}
    set size ratio -1
set xrange [-2:3]
set yrange [-2:3]
set key outside
plot '< grep a log' u 2:3 w p pt 5 t 'with braces', \
     '< grep b log' u 2:3 w p pt 7 t 'without braces'
    (script)