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Monads in LFE
One of the things that Robert and I have started using in LFE is the "data" form for pattern matching and, well, data ;-) Here's an example using the constructors:
(defun >>=
(((tuple 'error reason) f)
(tuple 'error reason))
(((tuple 'ok value) f)
(funcall f value))
(('ok f)
(funcall f 'ok)))
Here's an example using the "data" form:
(defun >>=
((`#(error ,reason) f)
(tuple 'error reason))
((`#(ok ,value) f)
(funcall f value))
(('ok f)
(funcall f 'ok)))
However, I tend to use the data/quoted form more often that not, e.g.:
(defun >>=
((`#(error ,reason) f)
`#(error ,reason))
((`#(ok ,value) f)
(funcall f value))
(('ok f)
(funcall f 'ok)))
If you prefer to use the longer constructor form, just say the word and I won't submit any PRs to change that :-)
There's no set standard or convention around this; either way is totally fine. Well, I guess there is one convention: to use the constructor form when teaching LFE to newcomers, that way one can postpone discussions about backquotes, unquotes, etc., until later.
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