Jon Pretty

.@rgladwell A good answer would be to use Rapture's modes: http://rapture.io/mod/core 

@propensive @rgladwell Have you seen experience reports from people using modes (in either Rapture or Parboiled)? The idea makes me nervous…

@travisbrown @rgladwell I haven't had much feedback, except that I've been using them for a couple of years without trouble...

.@propensive Add a type parameter and I'd be all for it—"…and this import changes your return types" just sounds like a joke about Scala. :)

@travisbrown By the way, there is an "explicit" mode which requires an additional call to {.option, .get, .future, .either} to get a value.

@travisbrown It's unfortunate that the type-param equivalent would need a [*, *]->* type to accommodate the exception type (when it's used).