Docs update.

docs/ham-fisted.hlet.html

@@ -18,7 +18,12 @@
 This uses a special symbol that will look like a function call on the
 right hand side as the dispatch mechanism.</p>
 <p>See source code of this file for example extensions.</p>
-</div></div><div class="src-link"><a href="https://github.com/cnuernber/ham-fisted/blob/master/src/ham_fisted/hlet.clj#L26">view source</a></div></div><div class="public anchor" id="var-let"><h3>let</h3><h4 class="type">macro</h4><div class="usage"><code>(let bindings &amp; body)</code></div><div class="doc"><div class="markdown"><p>Extensible let intended to allow typed destructuring of arbitrary datatypes such as primitive vectors
-or point types.  Falls back to normal let after extension process.</p>
+</div></div><div class="src-link"><a href="https://github.com/cnuernber/ham-fisted/blob/master/src/ham_fisted/hlet.clj#L26">view source</a></div></div><div class="public anchor" id="var-let"><h3>let</h3><h4 class="type">macro</h4><div class="usage"><code>(let bindings &amp; body)</code></div><div class="doc"><div class="markdown"><p>Extensible let intended to allow typed destructuring of arbitrary datatypes such as primitive arrays
+or point types.  Falls back to normal let after extension process.  Two extensions are registered by default -
+<code>dbls</code> and <code>lngs</code> which destructure into primitive doubles and primitive longs, respectively.</p>
+<pre><code class="language-clojure">user&gt; (h/let [[x y] (dbls (hamf/double-array [1 2]))]
+        (+ x y))
+3.0
+</code></pre>
 </div></div><div class="src-link"><a href="https://github.com/cnuernber/ham-fisted/blob/master/src/ham_fisted/hlet.clj#L66">view source</a></div></div><div class="public anchor" id="var-let-extension-names"><h3>let-extension-names</h3><div class="usage"><code>(let-extension-names)</code></div><div class="doc"><div class="markdown"><p>Return the current extension names.</p>
-</div></div><div class="src-link"><a href="https://github.com/cnuernber/ham-fisted/blob/master/src/ham_fisted/hlet.clj#L104">view source</a></div></div></div></body></html>
+</div></div><div class="src-link"><a href="https://github.com/cnuernber/ham-fisted/blob/master/src/ham_fisted/hlet.clj#L112">view source</a></div></div></div></body></html>

src/ham_fisted/hlet.clj

@@ -64,8 +64,16 @@ user> (hlet [[a b] (dbls [1 2])] (+ a b))
 
 
 (defmacro let
-  "Extensible let intended to allow typed destructuring of arbitrary datatypes such as primitive vectors
-  or point types.  Falls back to normal let after extension process."
+  "Extensible let intended to allow typed destructuring of arbitrary datatypes such as primitive arrays
+  or point types.  Falls back to normal let after extension process.  Two extensions are registered by default -
+  `dbls` and `lngs` which destructure into primitive doubles and primitive longs, respectively.
+
+```clojure
+user> (h/let [[x y] (dbls (hamf/double-array [1 2]))]
+        (+ x y))
+3.0
+```
+  "
   [bindings & body]
   (when-not (== 0 (rem (count bindings) 2))
     (throw (RuntimeException. "Bindings must be divisible by 2")))