Delegate

Providers.Func(Func<Key, Value>) adapts a delegate into a provider.

IProvider<double, double> squareProvider = Providers.Func((double x) => x * x);
WriteLine(squareProvider[10]); // -> "100"

Providers.Func(TryCreate<Key, Value>) adapts TryCreate<Key, Value> delegate into a provider.

/// <summary>Try create pattern.</summary>
public delegate bool TryCreate<Key, Value>(Key key, out Value value);

IProvider<double, double> squareProvider = Providers.Func<double, double>(TrySquare);
WriteLine(squareProvider[10]); // -> "100"

public static bool TrySquare(double x, out double result) { result = x * x; return true; }

.ValueFunc(Func<Value, Value>) decorates a provider to apply a delegate on the value.

IProvider<double, double> provider = Providers.Func((double x) => x * x);
provider = provider.ValueFunc(x => x * 2.0);
WriteLine(provider[10]); // -> "200"

Full Example

Full example

using Avalanche.Utilities.Provider;
using static System.Console;

class provider_delegate
{
    public static void Run()
    {
        {
            // <01>
            IProvider<double, double> squareProvider = Providers.Func((double x) => x * x);
            WriteLine(squareProvider[10]); // -> "100"
            // </01>
        }
        {
            // <02>
            IProvider<double, double> squareProvider = Providers.Func<double, double>(TrySquare);
            WriteLine(squareProvider[10]); // -> "100"
            // </02>
        }
        {
            // <03>
            IProvider<double, double> provider = Providers.Func((double x) => x * x);
            provider = provider.ValueFunc(x => x * 2.0);
            WriteLine(provider[10]); // -> "200"
            // </03>
        }
    }


    // <02B>
    public static bool TrySquare(double x, out double result) { result = x * x; return true; }
    // </02B>

}