On Saturday, 12 May 2012 at 09:08:30 UTC, John Chapman wrote:
Functions you want to memoize have to be visible to std.functional.memoize, so it only works with public functions.
This is an artifact of the way access protection for alias parameters is currently implemented – when accessing (»resolving«) an alias parameter, protection attributes are checked in the same way as if you just wrote the symbol name, i.e. in the scope of the module where e.g. memoize is defined.
In my opinion, this is a … uhm … _questionable_ design decision, even more so than the fact that private module members are not at all private to that module (as they are still taken into account for overload resolution). Several other issues, e.g. being unable to std.concurrency.spawn() private functions, are also caused by this.
David
