chrisalexander

static class OperatorModeExtensions
{
    static bool IsValidForUpdate(this OperatorMode mode)
    {
        return mode == OperatorMode.Admin || mode == OperatorMode.Sysadmin;
    }

    // All users can view homepage
    static bool CanViewHomepage(this OperatorMode mode)
    {

chrisalexander

static class OperatorModeExtensions
{
    static bool IsValid(this OperatorMode mode)
    {
        return mode == OperatorMode.Admin || mode == OperatorMode.Sysadmin;
    }
}

var validActions = actions.Where(a => a.Operator.IsValid());

chrisalexander

var validActions = actions.Where(a => a.Operator == OperatorMode.Admin || a.Operator == OperatorMode.Sysadmin);

chrisalexander

enum OperatorMode
{
    Anonymous,
    Member,
    Operator,
    Admin,
    Sysadmin
}

chrisalexander

class Action
{
    public string ActionName { get; }
    public OperatorMode Operator { get; }
}

List<Action> actions = getOperatorModes();

var validActions = actions.Where(a => a.Operator == OperatorMode.Admin);

chrisalexander

enum OperatorMode
{
    Member,
    Operator,
    Admin
}

chrisalexander

let cb = validate 4

match cb with
| Some x -> x()
| None -> -1

chrisalexander

// Arbitrary function
let doValidate x =
    x > 3

// Arbitrary execution function
let doExecute x = 0

// Validate and return function to execute
let validate x = 
    match doValidate x with

chrisalexander

class ObjectProcessor4Implementation : ObjectProcessor4
{
    public bool CanProcess(DomainObject x, out Func<Result> doProcess)
    {
        if (!this.Validate(x))
        {
            doProcess = null;
            return false;
        }
 

chrisalexander

interface ObjectProcessor4
{
    bool CanProcess(DomainObject x, out Func<Result> doProcess);
}
 
public Result DoProcessing4(ObjectProcessor4 processor, DomainObject x)
{
    Action doProcess;
    if (processor.CanProcess(x, out doProcess))
    {