/// <summary>
/// Adds a new function for the given types.
/// </summary>
/// <param name="left">The type of the left operand.</param>
/// <param name="right">The type of the right operand.</param>
/// <param name="func">
/// The function that handles those operands.
/// </param>
/// <param name="replaceChildren">
/// Iff <c>true</c>, the functions that handle types more derived than
/// <c>left</c> and <c>right</c> should be removed from this operator.
/// </param>
public virtual void AddFunction(Type left, Type right, CLComparisonFunc func, bool replaceChildren = true)
{
Dictionary <Type, CLComparisonFunc> subDict;
if (!Functions.ContainsKey(left))
{
subDict = new Dictionary <Type, CLComparisonFunc>();
Functions[left] = subDict;
}
else
{
subDict = Functions[left];
}
subDict[right] = func;
// Now replace all the child types if necessary.
if (replaceChildren)
{
foreach (Type leftTest in Functions.Keys)
{
if (leftTest.IsSubclassOf(left) || leftTest == left)
{
foreach (Type rightTest in Functions[leftTest].Keys)
{
if (rightTest.IsSubclassOf(right) || (rightTest == right && leftTest != left))
{
Functions[left].Remove(right);
}
}
}
}
}
}
public override CLBinaryOperatorFunc this[Type left, Type right] {
get {
CLComparisonFunc func = Parent[left, right];
if (func != null)
{
return((l, r, vars, context) => func(l, Comparison, r, vars, context));
}
else
{
return(null);
}
}
}