bugfix: Bool, not Boolean

1 files changed, 2 insertions, 2 deletions

diff --git a/interpreter.py b/interpreter.py
index 47b2363..60338f1 100644
--- a/interpreter.py
+++ b/interpreter.py
@@ -389,7 +389,7 @@ def interpretBranch(symbol, args, env):
         if len(arg.args) != 2:
             raise InterpretPanic(symbol, "each branch requires two expressions")
         cond = evaluate(arg.args[0], env)  # this is the condition
-        if not isinstance(cond, Boolean):
+        if not isinstance(cond, Bool):
             raise InterpretPanic(symbol, "branch condition must be :bool", cond)
         if cond.value:
             return evaluate(arg.args[1], env)
@@ -467,7 +467,7 @@ def interpretListLength(symbol, args, env):
     ev = evaluate(args[0], env)
     if not isinstance(ev, List):
         raise InterpretPanic(symbol, "requires a :list", ev)
-    return Literal(len(ev.args))
+    return Int(len(ev.args))
 
 GLOBALS.register("list-length", Builtin(interpretListLength, 1))