(* * Copyright (c) 1997-1999 Massachusetts Institute of Technology * Copyright (c) 2003, 2007-11 Matteo Frigo * Copyright (c) 2003, 2007-11 Massachusetts Institute of Technology * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * *) open Util type color = | RED | BLUE | BLACK | YELLOW type dagnode = { assigned: Variable.variable; mutable expression: Expr.expr; input_variables: Variable.variable list; mutable successors: dagnode list; mutable predecessors: dagnode list; mutable label: int; mutable color: color} type dag val makedag : (Variable.variable * Expr.expr) list -> dag val map : (dagnode -> dagnode) -> dag -> dag val for_all : dag -> (dagnode -> unit) -> unit val to_list : dag -> (dagnode list) val bfs : dag -> dagnode -> int -> unit val find_node : (dagnode -> bool) -> dag -> dagnode option