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/********************* */
/** node_value.cpp
** Original author: mdeters
** Major contributors: none
** Minor contributors (to current version): dejan
** This file is part of the CVC4 prototype.
** Copyright (c) 2009, 2010 The Analysis of Computer Systems Group (ACSys)
** Courant Institute of Mathematical Sciences
** New York University
** See the file COPYING in the top-level source directory for licensing
** information.
**
** An expression node.
**
** Instances of this class are generally referenced through
** cvc4::Node rather than by pointer; cvc4::Node maintains the
** reference count on NodeValue instances and
**/
#include "expr/node_value.h"
#include "expr/node.h"
#include <sstream>
using namespace std;
namespace CVC4 {
namespace expr {
size_t NodeValue::next_id = 1;
NodeValue NodeValue::s_null(0);
string NodeValue::toString() const {
stringstream ss;
toStream(ss);
return ss.str();
}
void NodeValue::toStream(std::ostream& out) const {
if(d_kind == kind::VARIABLE) {
string s;
// conceptually "this" is const, and hasAttribute() doesn't change
// its argument, but it requires a non-const key arg (for now)
if(NodeManager::currentNM()->getAttribute(const_cast<NodeValue*>(this),
VarNameAttr(), s)) {
out << s;
} else {
out << "var_" << d_id;
}
} else {
out << "(" << Kind(d_kind);
for(const_nv_iterator i = nv_begin(); i != nv_end(); ++i) {
if(i != nv_end()) {
out << " ";
}
(*i)->toStream(out);
}
out << ")";
}
}
}/* CVC4::expr namespace */
}/* CVC4 namespace */
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