/// <summary>
/// Compares two function types, by first normalizing so that they each have
/// names of variables that correspond to the locations in the function
/// </summary>
public static bool CompareFxnTypes(CatFxnType f, CatFxnType g)
{
CatFxnType f2 = CatVarRenamer.RenameVars(f.AddImplicitRhoVariables());
CatFxnType g2 = CatVarRenamer.RenameVars(g.AddImplicitRhoVariables());
return(f2.IsSubtypeOf(g2));
}
public CatFxnType LocalComposeTypes(CatFxnType left, CatFxnType right)
{
// Make sure that the variables on the left function and the variables
// on the right function are different
CatVarRenamer renamer = new CatVarRenamer();
left = renamer.Rename(left.AddImplicitRhoVariables());
renamer.ResetNames();
right = renamer.Rename(right.AddImplicitRhoVariables());
Log("==");
Log("Composing : " + left.ToString());
Log("with : " + right.ToString());
Log("Adding constraints");
Relation rLeft = FxnTypeToRelation(left);
Relation rRight = FxnTypeToRelation(right);
//TODO: remove
//rLeft.UnrollRecursiveRelations();
//rRight.UnrollRecursiveRelations();
Relation result = new Relation(rLeft.GetLeft(), rRight.GetRight());
AddTopLevelConstraints(rLeft.GetRight(), rRight.GetLeft());
AddConstraint(CreateVar("result$"), result);
Log("Constraints");
ComputeConstraintLists();
LogConstraints();
Log("Unifiers");
ComputeUnifiers();
foreach (string sVar in GetConstrainedVars())
{
Constraint u = GetUnifierFor(sVar);
Log("var: " + sVar + " = " + u);
}
Log("Composed Type");
Constraint c = GetResolvedUnifierFor("result$");
if (!(c is Relation))
throw new Exception("Resolved type is not a relation");
// TODO: remove
// Relation r = c as Relation;
// r.RollupRecursiveRelations();
CatKind k = ConstraintToCatKind(c);
CatFxnType ft = k as CatFxnType;
Log("raw type : " + ft.ToString());
Log("pretty type : " + ft.ToPrettyString());
Log("==");
CheckConstraintQueueEmpty();
// Check if the relation was valid, and thus the function type
if (!ft.IsValid())
throw new Exception("invalid function type: " + ft.ToString());
return ft;
}
/// <summary>
/// Compares two function types, by first normalizing so that they each have
/// names of variables that correspond to the locations in the function
/// </summary>
public static bool CompareFxnTypes(CatFxnType f, CatFxnType g)
{
CatFxnType f2 = CatVarRenamer.RenameVars(f.AddImplicitRhoVariables());
CatFxnType g2 = CatVarRenamer.RenameVars(g.AddImplicitRhoVariables());
return f2.IsSubtypeOf(g2);
}
public CatFxnType LocalComposeTypes(CatFxnType left, CatFxnType right)
{
// Make sure that the variables on the left function and the variables
// on the right function are different
CatVarRenamer renamer = new CatVarRenamer();
left = renamer.Rename(left.AddImplicitRhoVariables());
renamer.ResetNames();
right = renamer.Rename(right.AddImplicitRhoVariables());
Log("==");
Log("Composing : " + left.ToString());
Log("with : " + right.ToString());
Log("Adding constraints");
Relation rLeft = FxnTypeToRelation(left);
Relation rRight = FxnTypeToRelation(right);
//TODO: remove
//rLeft.UnrollRecursiveRelations();
//rRight.UnrollRecursiveRelations();
Relation result = new Relation(rLeft.GetLeft(), rRight.GetRight());
AddTopLevelConstraints(rLeft.GetRight(), rRight.GetLeft());
AddConstraint(CreateVar("result$"), result);
Log("Constraints");
ComputeConstraintLists();
LogConstraints();
Log("Unifiers");
ComputeUnifiers();
foreach (string sVar in GetConstrainedVars())
{
Constraint u = GetUnifierFor(sVar);
Log("var: " + sVar + " = " + u);
}
Log("Composed Type");
Constraint c = GetResolvedUnifierFor("result$");
if (!(c is Relation))
{
throw new Exception("Resolved type is not a relation");
}
// TODO: remove
// Relation r = c as Relation;
// r.RollupRecursiveRelations();
CatKind k = ConstraintToCatKind(c);
CatFxnType ft = k as CatFxnType;
Log("raw type : " + ft.ToString());
Log("pretty type : " + ft.ToPrettyString());
Log("==");
CheckConstraintQueueEmpty();
// Check if the relation was valid, and thus the function type
if (!ft.IsValid())
{
throw new Exception("invalid function type: " + ft.ToString());
}
return(ft);
}
