Lines Matching refs:stack

87         $stack = array ();
92                 if (count($stack) < 2) throw new Exception("RPN stack underflow"); //FIXME: Position
95                 $b = array_pop($stack);
96                 $a = array_pop($stack);
98                 array_push($stack, $r);
102                 if (count($stack) < 2) throw new Exception("RPN stack underflow"); //FIXME: Position
105                 $b = array_pop($stack);
106                 $a = array_pop($stack);
108                 array_push($stack, $r);
112                 if (count($stack) < 2) throw new Exception("RPN stack underflow"); //FIXME: Position
115                 $b = array_pop($stack);
116                 $a = array_pop($stack);
118                 array_push($stack, $r);
122                 if (count($stack) < 2) throw new Exception("RPN stack underflow"); //FIXME: Position
125                 $b = array_pop($stack);
126                 $a = array_pop($stack);
129                 array_push($stack, $r);
133                 if (count($stack) < 2) throw new Exception("RPN stack underflow"); //FIXME: Position
136                 $b = array_pop($stack);
137                 $a = array_pop($stack);
140                 array_push($stack, $r);
148                     array_push($stack, $this->constants[$v]);
150                     array_push($stack, $v);
155         if (count($stack) > 1) throw new Exception("Unused parameters on RPN stack.");
157         return array_pop($stack);