/// <summary>
/// Wraps the given value in a WeakReference and returns a tree that will retrieve
/// the value from the WeakReference.
/// </summary>
public static MemberExpression WeakConstant(object value)
{
System.Diagnostics.Debug.Assert(!(value is Expression));
return(Ast.ReadProperty(
Ast.RuntimeConstant(new WeakReference(value)),
typeof(WeakReference).GetProperty("Target")
));
}