/// <summary>
/// Constructor
/// </summary>
/// <param name="efsSystem"></param>
public Override(EfsSystem efsSystem)
: base(efsSystem, "Override")
{
DefaultFunction = (Parameter)acceptor.getFactory().createParameter();
DefaultFunction.Name = "Default";
DefaultFunction.Type = EFSSystem.AnyType;
DefaultFunction.setFather(this);
FormalParameters.Add(DefaultFunction);
OverrideFunction = (Parameter)acceptor.getFactory().createParameter();
OverrideFunction.Name = "Override";
OverrideFunction.Type = EFSSystem.AnyType;
OverrideFunction.setFather(this);
FormalParameters.Add(OverrideFunction);
Returns = (Function)acceptor.getFactory().createFunction();
Returns.Name = "Override";
Returns.ReturnType = EFSSystem.DoubleType;
Returns.setFather(this);
Parameter distanceParam = (Parameter)acceptor.getFactory().createParameter();
distanceParam.Name = "Distance";
distanceParam.Type = EFSSystem.DoubleType;
distanceParam.setFather(Returns);
Returns.appendParameters(distanceParam);
Parameter speedParameter = (Parameter)acceptor.getFactory().createParameter();
speedParameter.Name = "Speed";
speedParameter.Type = EFSSystem.DoubleType;
speedParameter.setFather(Returns);
Returns.appendParameters(speedParameter);
}
/// <summary>
/// Provides the surface of this function if it has been statically defined
/// </summary>
/// <param name="context">the context used to create the surface</param>
/// <param name="explain"></param>
/// <returns></returns>
public override Surface CreateSurface(InterpretationContext context, ExplanationPart explain)
{
Surface retVal = null;
Surface defaultSurface = createSurfaceForValue(context, context.FindOnStack(DefaultFunction).Value, explain);
if (defaultSurface != null)
{
Surface overrideSurface = createSurfaceForValue(context, context.FindOnStack(OverrideFunction).Value,
explain);
if (overrideSurface != null)
{
retVal = defaultSurface.Override(overrideSurface);
}
else
{
OverrideFunction.AddError("Cannot create graph for OVERRIDE argument");
}
}
else
{
DefaultFunction.AddError("Cannot create graph for DEFAULT argument");
}
return(retVal);
}
