POP               116 ext/racc/cparse/cparse.c #define POP(s) rb_ary_pop(s)
POP               441 util.c         #define POP(ll,rr)  do { --top; ll = top->LL; rr = top->RR; } while (0)      /* Pop L,l,R,r */
POP                75 vm_insnhelper.h #define POP()   (DEC_SP(1))