/*
* opencog/atoms/parallel/DontExecLink.h
*
* Copyright (C) 2015 Linas Vepstas
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License v3 as
* published by the Free Software Foundation and including the exceptions
* at http://opencog.org/wiki/Licenses
*
* 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 Affero General Public License
* along with this program; if not, write to:
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _OPENCOG_DONT_EXEC_LINK_H
#define _OPENCOG_DONT_EXEC_LINK_H
#include <opencog/atoms/base/Link.h>
namespace opencog
{
/** \addtogroup grp_atomspace
* @{
*/
/// The DontExecLink returns whatever Atom it wraps (without executing
/// that Atom). It act as a firewall, preventing execution beyond that
/// point.
///
class DontExecLink : public Link
{
public:
DontExecLink(const HandleSeq&&, Type=DONT_EXEC_LINK);
DontExecLink(const DontExecLink&) = delete;
DontExecLink& operator=(const DontExecLink&) = delete;
virtual bool is_executable() const { return true; }
virtual ValuePtr execute(AtomSpace*, bool) { return _outgoing[0]; }
static Handle factory(const Handle&);
};
LINK_PTR_DECL(DontExecLink)
#define createDontExecLink CREATE_DECL(DontExecLink)
/** @}*/
}
#endif // _OPENCOG_DONT_EXEC_LINK_H