I use clojure.contrib.def/defvar a lot. It's really useful for adding
docstrings to non-function vars. But I've been tripped up by the same
mistake a lot now—I keep expecting the docstring to go after the
initial value, because that would be consistent with defn, defmacro,
and defmulti.
Here are the current forms of defvar:
(defvar name)
(defvar name init)
(defvar name init doc-string)
Why can't they be like this:
(defvar name)
(defvar name init)
(defvar name doc-string init)
These forms are possible from just arity overloading.
For bonus points, the form can be instead:
(defvar name doc-string? attr-map? init)
though that would be above the call of duty.
The biggest reason why they shouldn't be rearranged that I can think
of is that people might make mistakes when defining a var with a doc-
string without any initial value, which isn't much of a reason
compared to consistency with the core API. While it's okay if it's not
possible to change clojure.contrib.def/defvar, I would love for it to
happen.
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