// Note: see page 327.
public StandardizeApartResult standardizeApart(Sentence aSentence,
StandardizeApartIndexical standardizeApartIndexical)
{
List<Variable> toRename = variableCollector
.collectAllVariables(aSentence);
Dictionary<Variable, Term> renameSubstitution = new Dictionary<Variable, Term>();
Dictionary<Variable, Term> reverseSubstitution = new Dictionary<Variable, Term>();
foreach (Variable var in toRename)
{
Variable v = null;
do
{
v = new Variable(standardizeApartIndexical.getPrefix()
+ standardizeApartIndexical.getNextIndex());
// Ensure the new variable name is not already
// accidentally used in the sentence
} while (toRename.Contains(v));
renameSubstitution.Add(var, v);
reverseSubstitution.Add(v, var);
}
Sentence standardized = substVisitor.subst(renameSubstitution,
aSentence);
return new StandardizeApartResult(aSentence, standardized,
renameSubstitution, reverseSubstitution);
}
public Clause standardizeApart(Clause clause,
StandardizeApartIndexical standardizeApartIndexical)
{
List<Variable> toRename = variableCollector.collectAllVariables(clause);
Dictionary<Variable, Term> renameSubstitution = new Dictionary<Variable, Term>();
foreach (Variable var in toRename)
{
Variable v = null;
do
{
v = new Variable(standardizeApartIndexical.getPrefix()
+ standardizeApartIndexical.getNextIndex());
// Ensure the new variable name is not already
// accidentally used in the sentence
} while (toRename.Contains(v));
if (renameSubstitution.ContainsKey(var))
{
renameSubstitution[var] = v;
}
else
{
renameSubstitution.Add(var, v);
}
}
if (renameSubstitution.Count > 0)
{
List<Literal> literals = new List<Literal>();
foreach (Literal l in clause.getLiterals())
{
literals.Add(substVisitor.subst(renameSubstitution, l));
}
Clause renamed = new Clause(literals);
renamed.setProofStep(new ProofStepRenaming(renamed, clause
.getProofStep()));
return renamed;
}
return clause;
}
public object visitQuantifiedSentence(QuantifiedSentence sentence, object arg)
{
ISet <Variable> seenSoFar = (Set <Variable>)arg;
// Keep track of what I have to subst locally and
// what my renamed variables will be.
IMap <Variable, Term> localSubst = CollectionFactory.CreateInsertionOrderedMap <Variable, Term>();
ICollection <Variable> replVariables = CollectionFactory.CreateQueue <Variable>();
foreach (Variable v in sentence.getVariables())
{
// If local variable has be renamed already
// then I need to come up with own name
if (seenSoFar.Contains(v))
{
Variable sV = new Variable(quantifiedIndexical.getPrefix() + quantifiedIndexical.getNextIndex());
localSubst.Put(v, sV);
// Replacement variables should contain new name for variable
replVariables.Add(sV);
}
else
{
// Not already replaced, this name is good
replVariables.Add(v);
}
}
// Apply the local subst
Sentence subst = substVisitor.subst(localSubst, sentence.getQuantified());
// Ensure all my existing and replaced variable
// names are tracked
seenSoFar.AddAll(replVariables);
Sentence sQuantified = (Sentence)subst.accept(this, arg);
return(new QuantifiedSentence(sentence.getQuantifier(), replVariables, sQuantified));
}
public Chain standardizeApart(Chain chain, StandardizeApartIndexical standardizeApartIndexical)
{
ISet <Variable> toRename = variableCollector.collectAllVariables(chain);
IMap <Variable, Term> renameSubstitution = CollectionFactory.CreateInsertionOrderedMap <Variable, Term>();
foreach (Variable var in toRename)
{
Variable v = null;
do
{
v = new Variable(standardizeApartIndexical.getPrefix()
+ standardizeApartIndexical.getNextIndex());
// Ensure the new variable name is not already
// accidentally used in the sentence
} while (toRename.Contains(v));
renameSubstitution.Put(var, v);
}
if (renameSubstitution.Size() > 0)
{
ICollection <Literal> lits = CollectionFactory.CreateQueue <Literal>();
foreach (Literal l in chain.getLiterals())
{
AtomicSentence atom = (AtomicSentence)substVisitor.subst(renameSubstitution, l.getAtomicSentence());
lits.Add(l.newInstance(atom));
}
Chain renamed = new Chain(lits);
renamed.setProofStep(new ProofStepRenaming(renamed, chain.getProofStep()));
return(renamed);
}
return(chain);
}
// Note: see page 327.
public StandardizeApartResult standardizeApart(Sentence sentence, StandardizeApartIndexical standardizeApartIndexical)
{
ISet <Variable> toRename = variableCollector.collectAllVariables(sentence);
IMap <Variable, Term> renameSubstitution = CollectionFactory.CreateInsertionOrderedMap <Variable, Term>();
IMap <Variable, Term> reverseSubstitution = CollectionFactory.CreateInsertionOrderedMap <Variable, Term>();
foreach (Variable var in toRename)
{
Variable v = null;
do
{
v = new Variable(standardizeApartIndexical.getPrefix() + standardizeApartIndexical.getNextIndex());
// Ensure the new variable name is not already
// accidentally used in the sentence
} while (toRename.Contains(v));
renameSubstitution.Put(var, v);
reverseSubstitution.Put(v, var);
}
Sentence standardized = substVisitor.subst(renameSubstitution, sentence);
return(new StandardizeApartResult(sentence, standardized, renameSubstitution, reverseSubstitution));
}
public Dictionary<Variable, Term> standardizeApart(List<Literal> l1Literals,
List<Literal> l2Literals,
StandardizeApartIndexical standardizeApartIndexical)
{
List<Variable> toRename = new List<Variable>();
foreach (Literal pl in l1Literals)
{
toRename.AddRange(variableCollector.collectAllVariables(pl
.getAtomicSentence()));
}
foreach (Literal nl in l2Literals)
{
toRename.AddRange(variableCollector.collectAllVariables(nl
.getAtomicSentence()));
}
Dictionary<Variable, Term> renameSubstitution = new Dictionary<Variable, Term>();
foreach (Variable var in toRename)
{
Variable v = null;
do
{
v = new Variable(standardizeApartIndexical.getPrefix()
+ standardizeApartIndexical.getNextIndex());
// Ensure the new variable name is not already
// accidentally used in the sentence
} while (toRename.Contains(v));
if (renameSubstitution.ContainsKey(var))
{
renameSubstitution[var] = v;
}
else
{
renameSubstitution.Add(var, v);
}
}
List<Literal> posLits = new List<Literal>();
List<Literal> negLits = new List<Literal>();
foreach (Literal pl in l1Literals)
{
posLits.Add(substVisitor.subst(renameSubstitution, pl));
}
foreach (Literal nl in l2Literals)
{
negLits.Add(substVisitor.subst(renameSubstitution, nl));
}
l1Literals.Clear();
l1Literals.AddRange(posLits);
l2Literals.Clear();
l2Literals.AddRange(negLits);
return renameSubstitution;
}
public Chain standardizeApart(Chain chain,
StandardizeApartIndexical standardizeApartIndexical)
{
List<Variable> toRename = variableCollector.collectAllVariables(chain);
Dictionary<Variable, Term> renameSubstitution = new Dictionary<Variable, Term>();
foreach (Variable var in toRename)
{
Variable v = null;
do
{
v = new Variable(standardizeApartIndexical.getPrefix()
+ standardizeApartIndexical.getNextIndex());
// Ensure the new variable name is not already
// accidentally used in the sentence
} while (toRename.Contains(v));
renameSubstitution.Add(var, v);
}
if (renameSubstitution.Count > 0)
{
List<Literal> lits = new List<Literal>();
foreach (Literal l in chain.getLiterals())
{
AtomicSentence atom = (AtomicSentence)substVisitor.subst(
renameSubstitution, l.getAtomicSentence());
lits.Add(l.newInstance(atom));
}
Chain renamed = new Chain(lits);
renamed.setProofStep(new ProofStepRenaming(renamed, chain
.getProofStep()));
return renamed;
}
return chain;
}