private Expr GenerateZ3WhereExpr(Variable expr, FastTransducerInstance fti)
{
foreach (var c in fti.consts)
{
if (c.name == expr.token.text)
return c.value;
}
return z3p.MkProj(alphabet.tupleKeys.IndexOf(expr.token.text), alphabet.alph.AttrVar);
}
private Expr GenerateZ3Expr(Variable expr, FastTransducerInstance fti)
{
foreach (var c in fti.consts)
{
if (c.name == expr.token.text)
return c.value;
}
throw new Exception("The constant " + expr.token.text + " wasn't defined before");
}
private Expr GenerateZ3ToExpr(Variable expr, RankedAlphabetSort outputAlph, List<FastToken> children)
{
//Find the child number and return the transition
int childPosition = 1;
foreach (var child in children)
{
if (child.text == ((Variable)expr).token.text)
{
break;
}
childPosition++;
}
return alphabet.alph.ChildVar(childPosition);
}
internal static FExp MkId(FastToken token)
{
string[] parts = token.text.Split('.');
//This is the case X.Y
if (parts.Length == 2)
{
var succ = Regex.Match(parts[0], @"^[A-Z]");
if (succ.Success)
{
//X starts with a capital letter, then this is an enum
return new EnumValue(token);
}
else
{
//Otherwise we are accessing the attribute of the current node
return new AttributeVariable(token);
}
}
else
{
var res = new Variable(token);
return res;
}
}
//Generates the code for an output of a transduction when the expression is a Variable
private static bool PrintOutputTree(List<FastToken> children, Variable ex, String range, StringBuilder sb, bool isapplied)
{
if (isapplied)
{
//this case is used when a child appear in the output applied to a transduction
sb.Append(ex.token.text);
return true;
}
//the child is not applied to any transduction
int i = 0;
foreach (var c in children)
{
if (c.text == ex.token.text)
{
sb.Append(" children[" + i + "] ");
return true;
}
i++;
}
return true;
}
//Generates the code for a Variable expression
private static bool PrintExpr(List<FastToken> children, Variable ex, StringBuilder sb)
{
int i = 0;
foreach (var c in children)
{
if (c.text == ex.token.text)
{
sb.Append(" children[" + i + "] ");
return true;
}
i++;
}
sb.Append(ex.token.text);
return true;
}
//Compute all the iterators necessary to generate a particular output of a transduction when expr is Variable
private static bool ComputeIterators(Variable ex, String range, StringBuilder sb, bool isApplied)
{
if (isApplied)
iterCases[0].Insert(0, ex.token.text);
return true;
}
