Hello all,
I ran into an extend-type issue with the ClojureScript compiler output. If
there's a better place to report such things, please point me there.
If I define a protocol method with multiple arities, implementing it using
deftype works as expected, however extend-type does not. The former
compiles to a single javascript function, which checks argument length to
handle arity. The latter produces two identically named functions, the
second of which overwrites the first; hence only one arity is available at
runtime.
Here's a simplified example. Given a protocol:
(defprotocol MyProtocol
(something [this]
[this x]))
I would expect the following two code snippets to compile with functional
equivalence.
(deftype MyType []
MyProtocol
(something [this] ... )
(something [this x] ... ))
(deftype MyType [])
(extend-type MyType
MyProtocol
(something [this] ... )
(something [this x] ... ))
The former compiles 'something' to a single function. The latter compiles
as:
myns.MyType.prototype.myns$MyProtocol$ = true;
myns.MyType.prototype.myns$MyProtocol$something = function(this$) { ... };
myns.MyType.prototype.myns$MyProtocol$something = function(this$, x) {
... };
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