Sonarr/NzbDrone.Common/EnsureThat/Ensure.cs

using System;
using System.Linq.Expressions;

namespace NzbDrone.Common.EnsureThat
{
    public static class Ensure
    {
        public static Param<T> That<T>(T value, string name = Param.DefaultName)
        {
            return new Param<T>(name, value);
        }

        public static Param<T> That<T>(Expression<Func<T>> expression)
        {
            var memberExpression = expression.GetRightMostMember();

            return new Param<T>(
                memberExpression.ToPath(),
                expression.Compile().Invoke());
        }

        public static TypeParam ThatTypeFor<T>(T value, string name = Param.DefaultName)
        {
            return new TypeParam(name, value.GetType());
        }
    }
}