internal static IGate Replace(this IGate gate, Func <IGate, IGate> replacer)
{
IGate result;
if (gate.Type.IsLogical())
{
result = gate.Clone();
if (result is IModifyGate)
{
var logic = (IModifyGate)result;
var inputs = result.GetInputs().ToList();
for (int j = 0; j < inputs.Count; ++j)
{
var input = inputs[j];
var r = input.Replace(replacer);
if (r != input)
{
logic.ReplaceInput(j, r);
}
}
}
else
{
throw new ArgumentException("expected logic gate.");
}
}
else
{
result = gate;
}
result = replacer(result);
return(result);
}
