/// <summary>
/// Memoizer with one parameter (kept as weak reference), used to perform a lazy-cached evaluation. (see http://en.wikipedia.org/wiki/Memoization)
/// </summary>
/// <typeparam name="TParam">The return type to memoize</typeparam>
/// <param name="func">the function to evaluate</param>
/// <returns>A memoized value</returns>
public static Func <TParam, TResult> AsWeakLockedMemoized <TParam, TResult>(this Func <TParam, TResult> func)
where TParam : class
{
var values = new WeakAttachedDictionary <TParam, string>();
return(v => values.GetValue(v, "value", () => func(v)));
}
