peek_stack        210 eval.c             src = peek_stack(inter, 0);
peek_stack        437 eval.c             left_val = peek_stack(inter, 1);
peek_stack        438 eval.c             right_val = peek_stack(inter, 0);
peek_stack        707 eval.c             left = peek_stack(inter, 0);
peek_stack        718 eval.c         	    add = peek_stack(inter, 0);