/// <summary>
/// Returns the reference of this object.
/// </summary>
/// <returns></returns>
public virtual AbstractTerm Reference()
{
if (IsAssigned())
{
return(_containee.Reference());
}
return(this);
}
public void Bind()
{
AbstractTerm term = new AbstractTerm();
AbstractTerm term2 = new AbstractTerm();
term.Bind(term2);
Assert.AreSame(term2, term.Reference());
}
public void Assign()
{
AbstractTerm term = new AbstractTerm();
ConstantTerm con = new ConstantTerm("ali");
term.Assign(con);
Assert.AreSame(term.Dereference(), con);
Assert.AreSame(term.Dereference(), con.Dereference());
Assert.AreEqual(term.Data(), con.Data());
Assert.AreSame(term.Reference(), con.Reference());
Assert.IsFalse(term.IsList);
Assert.IsFalse(term.IsObject);
Assert.IsFalse(term.IsReference);
Assert.IsFalse(term.IsStructure);
Assert.IsTrue(term.IsConstant);
}
public void Unify_ref_str()
{
AbstractTerm term = new AbstractTerm();
StructureTerm con = new StructureTerm();
Assert.IsTrue(term.Unify(con));
Assert.AreSame(term.Reference(), con.Reference());
Assert.IsTrue(term.IsStructure);
Assert.IsFalse(term.IsReference);
}
public void Unify_ref_lis()
{
AbstractTerm term = new AbstractTerm();
ListTerm con = new ListTerm();
Assert.IsTrue(term.Unify(con));
Assert.AreSame(term.Reference(), con.Reference());
Assert.IsTrue(term.IsList);
Assert.IsFalse(term.IsReference);
}
public void Unify_ref_con()
{
AbstractTerm term = new AbstractTerm();
ConstantTerm con = new ConstantTerm();
Assert.IsTrue(term.Unify(con));
Assert.AreEqual(term.Data(), con.Data());
Assert.AreSame(term.Reference(), con.Reference());
Assert.IsTrue(term.IsConstant);
Assert.IsFalse(term.IsReference);
}
public void Unbind()
{
AbstractTerm term = new AbstractTerm();
ConstantTerm con = new ConstantTerm("ali");
term.Assign(con);
term.Unbind();
Assert.AreNotSame(term.Reference(), con.Reference());
}