Merge pull request #63 from nushell/lisp_mode

Add a lisp mode

fun/lisp_mode.nu

@@ -0,0 +1,35 @@
+# Note: this requires the latest 0.32.1 or later
+#
+# usage:
+# > source lisp_mode.nu
+# > (echo (+ 1 (* 3 2)))
+
+def + [x, y] { $x + $y }
+
+def - [x, y] { $x - $y }
+
+def * [x, y] { $x * $y }
+
+def / [x, y] { $x / $y }
+
+def in [x, y] { $x in $y }
+
+def not-in [x, y] { $x not-in $y}
+
+def < [x, y] { $x < $y }
+
+def <= [x, y] { $x <= $y }
+
+def > [x, y] { $x > $y }
+
+def >= [x, y] { $x >= $y }
+
+def == [x, y] { $x == $y }
+
+def != [x, y] { $x != $y }
+
+def =~ [x, y] { $x =~ $y }
+
+def !~ [x, y] { $x !~ $y }
+
+def array [...rest] { echo $rest }