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// undefined expression class -*- c++ -*-
#ifdef __GNUC__
# pragma implementation
#endif // __GNUC__
#include "Undefined.h"
#include "Printer.h"
/** @file Undefined.C
* Undefined literal
*/
/* Copyright 1998-2001 Marko Mkel (msmakela@tcs.hut.fi).
This file is part of MARIA, a reachability analyzer and model checker
for high-level Petri nets.
MARIA 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, or (at your option)
any later version.
MARIA 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.
The GNU General Public License is often shipped with GNU software, and
is generally kept in a file called COPYING or LICENSE. If you do not
have a copy of the license, write to the Free Software Foundation,
59 Temple Place, Suite 330, Boston, MA 02111 USA. */
Undefined::Undefined (enum Fatalness fatalness) :
Expression (),
myFatalness (fatalness)
{
}
Undefined::~Undefined ()
{
}
class Value*
Undefined::do_eval (const class Valuation& valuation) const
{
switch (myFatalness) {
case fError:
valuation.flag (errUndef, *this);
return 0;
case fFatalError:
valuation.flag (errFatal, *this);
return 0;
}
assert (false);
return 0;
}
bool
Undefined::depends (const class VariableSet&,
bool) const
{
return false;
}
bool
Undefined::forVariables (bool (*)
(const class Expression&,void*),
void*) const
{
return true;
}
#ifdef EXPR_COMPILE
# include "CExpression.h"
void
Undefined::compile (class CExpression& cexpr,
unsigned indent,
const char*,
const class VariableSet*) const
{
cexpr.compileError (indent, myFatalness == fError ? errUndef : errFatal);
}
#endif // EXPR_COMPILE
void
Undefined::display (const class Printer& printer) const
{
printer.printRaw (myFatalness == fFatalError ? "fatal" : "undefined");
}
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