Remake the number module directory

types/src/number/mod.rs

@@ -0,0 +1,24 @@
+/* number.rs
+ * Eryn Wells <eryn@erynwells.me>
+ */
+
+/// # Numbers
+///
+/// Scheme numbers are complex, literally.
+
+type Int = i64;
+type Flt = f64;
+
+trait Number {
+    fn is_number(&self) -> bool { true }
+    fn is_complex(&self) -> bool { false }
+    fn is_real(&self) -> bool { false }
+    fn is_rational(&self) -> bool { false }
+    fn is_integer(&self) -> bool { false }
+}
+
+struct Integer(Int);
+struct Rational(Int, Int);
+struct Real(Flt);
+struct Complex<'a>(&'a Number, &'a Number);
+