/// <summary>
/// Provides the callable that is called by this expression
/// </summary>
/// <param name="namable"></param>
/// <returns></returns>
public override ICallable getCalled(InterpretationContext context)
{
ICallable retVal = null;
Functions.Function function = InitialValue.Ref as Functions.Function;
if (function == null)
{
function = InitialValue.getCalled(context) as Functions.Function;
}
if (function != null)
{
if (function.FormalParameters.Count == 1)
{
int token = context.LocalScope.PushContext();
context.LocalScope.setGraphParameter((Parameter)function.FormalParameters[0]);
Functions.Graph graph = createGraph(context, (Parameter)function.FormalParameters[0]);
context.LocalScope.PopContext(token);
if (graph != null)
{
retVal = graph.Function;
}
}
else if (function.FormalParameters.Count == 2)
{
int token = context.LocalScope.PushContext();
context.LocalScope.setSurfaceParameters((Parameter)function.FormalParameters[0], (Parameter)function.FormalParameters[1]);
Functions.Surface surface = createSurface(context, (Parameter)function.FormalParameters[0], (Parameter)function.FormalParameters[1]);
context.LocalScope.PopContext(token);
if (surface != null)
{
retVal = surface.Function;
}
}
else
{
AddError("Cannot evaluate REDUCE expression to a function");
}
}
else
{
AddError("Cannot evaluate REDUCE expression to a function");
}
return(retVal);
}
