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#ifndef __PSpec_H
#define __PSpec_H
* Copyright (c) 2006 Stephen Williams <>
* This source code is free software; you can redistribute it
* and/or modify it in source code form 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
* 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
#ident "$Id: PSpec.h,v 1.2 2007/02/12 01:52:21 steve Exp $"
# include "LineInfo.h"
# include "StringHeap.h"
# include <vector>
class PExpr;
* The PSpecPath is the parse of a specify path, which is in its most
* general form <path> = <delays>. The <delays> are collected into the
* "delays" vector in all cases, and the variety is in the other
* members.
* All paths also have a list of source names in the src vector, and a
* list of destination names in the dst vector. These pairs are the
* actual paths.
* If the path is a simple path, then:
* condition == nil
* edge == 0
* data_source_expression == nil
* If the path is conditional, then conditional == true and condition
* is the condition expression. If the condition expression is nil,
* then this is an ifnone conditional path.
* If edge != 0, then the path is edge sensitive and the optional
* data_source_expression may be present.
class PSpecPath : public LineInfo {
PSpecPath(unsigned src_cnt, unsigned dst_cnt);
void elaborate(class Design*des, class NetScope*scope) const;
void dump(std::ostream&out, unsigned ind) const;
// Condition expression, if present.
bool conditional;
class PExpr* condition;
// Edge specification (-1==negedge, 0 = no edge, 1==posedge)
int edge;
// Ordered set of source nodes of a path
std::vector<perm_string> src;
// Ordered set of destination nodes of a path
std::vector<perm_string> dst;
// Data source expression
class PExpr* data_source_expression;
std::vector<class PExpr*>delays;
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