1 files changed, 43 insertions, 0 deletions
diff --git a/actinide/builtin.py b/actinide/builtin.py
index 06623b3..68ed698 100644
--- a/actinide/builtin.py
+++ b/actinide/builtin.py
@@ -2,8 +2,24 @@
 
 from functools import wraps
 
+dunder_names = {
+    '__add__': '+',
+    '__sub__': '-',
+    '__mul__': '*',
+    '__floordiv__': '/',
+    '__eq__': '=',
+    '__ne__': '!=',
+    '__lt__': '<',
+    '__le__': '<=',
+    '__gt__': '>',
+    '__ge__': '>',
+}
+
 # Derives the lisp name of a python function or method handle, as follows:
 #
+# * Python dunder names are translated to their corresponding operator or
+#   symbol usind the ``dunder_names`` table.
+#
 # * A trailing '_p' in the Python name is converted into a question mark in the
 #   lisp name.
 #
@@ -17,6 +33,9 @@ def lisp_name(fn):
     if name == '<lambda>':
         return None
 
+    if name in dunder_names:
+        return dunder_names[name]
+
     # Trailing _p is a predicate, translate to ?
     if name.endswith('_p'):
         name = name[:-2] + '?'
@@ -42,3 +61,27 @@ def wrap_fn(fn):
     def wrapper(*args):
         return fn(*args),
     return wrapper
+
+def make_registry():
+    bindings = []
+    voids = []
+    fns = []
+    builtins = []
+
+    def bind(name, val):
+        bindings.append((name, val))
+        return val
+
+    def void(f):
+        voids.append(f)
+        return f
+
+    def fn(f):
+        fns.append(f)
+        return f
+
+    def builtin(f):
+        builtins.append(f)
+        return f
+
+    return bindings, voids, fns, builtins, bind, void, fn, builtin