[zenazn]

If Go supported method overloading, you could actually write the types of those functions out. The first one is either a string or a regexp.Regexp, and the second one is one of four variations on an http.Handler, giving a total of 8 varieties of each function.

I decided that the sin of exposing an interface{} as a parameter was less egregious than the sin of multiplying Goji's API surface area by a factor of 8, but you'll be happy to know that passing a value of the wrong type causes the invocation of Get (Post, etc.) to fatally exit immediately. If you're defining all your routes in a single goroutine before calling goji.Serve() (which is probably the most common way to define routes), your application will crash before it even binds to the socket.

So, not quite as good as a guarantee enforced at compile time, but it'll have to do.

[abbot2]

Don't get me wrong, I perfectly understand what interface{} is and why someone is tempted to use it. It just kills the type checking and converts your golang code to a compiled python, without all those nice static analysis things. Yes, API would be larger, but it would be compile time type-checked and you wouldn't depend on things like "well, it will most probably crash very early enough".

[sagichmal]

I totally agree with the parent: far better to have 8 methods doing the same thing with different names and statically-typed parameters, than 1 method taking interface{}s. Strong +1 to a change in API.