Extending protocols

[thomascothran]

version

0.8.124

problem

I would like to extend protocols to JavaScript Objects, Arrays, etc.

However, I receive an extend_protocol is not defined error each time.

First I define a protocol:

(defprotocol Identity (i [this]))

Then I try to extend it. I tried a few things:

(extend-protocol Identity object (i [s] s))
(extend-protocol Identity js/Object (i [s] s))
(extend-protocol Identity Object (i [s] s))

Similar experiments with array and string produced the same error.

repro

Repro in the squint playground

expected behavior

I'd expect something like this:

(defprotocol Identity (i [this]))
(extend-protocol Identity object (i [s] s))
(i {:hello :world})
; => {:hello :world}

[borkdude]

This is due to the absence of extend-protocol currently, but not that extend-type is available:

$ ./node_cli.js -e '(defprotocol Identity (i [this])) (extend-type object Identity (i [s] s)) (js/console.log (i 1))'
1

I'll add extend-protocol