Michel Fortin napisał: > As for the case of Appender... personally in the case above I'd be > tempted to use Appender.Impl directly (value semantics) and make fill > take a 'ref'. There's no point in having an extra heap allocation, > especially if you're calling test() in a loop or if there's a good > chance fill() has nothing to append to it.
Or take an output range. -- Tomek
