cannam@167: (*
cannam@167:  * Copyright (c) 1997-1999 Massachusetts Institute of Technology
cannam@167:  * Copyright (c) 2003, 2007-14 Matteo Frigo
cannam@167:  * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
cannam@167:  *
cannam@167:  * This program is free software; you can redistribute it and/or modify
cannam@167:  * it under the terms of the GNU General Public License as published by
cannam@167:  * the Free Software Foundation; either version 2 of the License, or
cannam@167:  * (at your option) any later version.
cannam@167:  *
cannam@167:  * This program is distributed in the hope that it will be useful,
cannam@167:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
cannam@167:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
cannam@167:  * GNU General Public License for more details.
cannam@167:  *
cannam@167:  * You should have received a copy of the GNU General Public License
cannam@167:  * along with this program; if not, write to the Free Software
cannam@167:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
cannam@167:  *
cannam@167:  *)
cannam@167: 
cannam@167: open Util
cannam@167: 
cannam@167: type color = | RED | BLUE | BLACK | YELLOW
cannam@167: 
cannam@167: type dagnode = 
cannam@167:     { assigned: Variable.variable;
cannam@167:       mutable expression: Expr.expr;
cannam@167:       input_variables: Variable.variable list;
cannam@167:       mutable successors: dagnode list;
cannam@167:       mutable predecessors: dagnode list;
cannam@167:       mutable label: int;
cannam@167:       mutable color: color}
cannam@167: 
cannam@167: type dag
cannam@167: 
cannam@167: val makedag : (Variable.variable * Expr.expr) list -> dag
cannam@167: 
cannam@167: val map : (dagnode -> dagnode) -> dag -> dag
cannam@167: val for_all : dag -> (dagnode -> unit) -> unit
cannam@167: val to_list : dag -> (dagnode list)
cannam@167: val bfs : dag -> dagnode -> int -> unit
cannam@167: val find_node : (dagnode -> bool) -> dag -> dagnode option