add return types to builtins

1 files changed, 3 insertions, 3 deletions

diff --git a/neb/std/repl.py b/neb/std/repl.py
index 39aba3b..43b514e 100644
--- a/neb/std/repl.py
+++ b/neb/std/repl.py
@@ -9,16 +9,16 @@ def interpretHowTo(symbol, args, env, ns):
     print(args[0].describe())
     return List([])
 
-REPL.register("howto", Builtin("howto", interpretHowTo, [Arg("symbol", TypeEnum.ANY)]))
+REPL.register("howto", Builtin("howto", interpretHowTo, [Arg("symbol", TypeEnum.ANY)], return_type=Type(":list")))
 
 def interpretSymbols(symbol, args, env, ns):
     keys = [Symbol(k, -1) for k,v in env.environment.items()]
     return List(keys)
 
-REPL.register("symbols", Builtin("symbols", interpretSymbols, []))
+REPL.register("symbols", Builtin("symbols", interpretSymbols, [], return_type=Type(":list")))
 
 def interpretUserSymbols(symbol, args, env, ns):
     keys = [Symbol(k, -1) for k,v in env.environment.items() if isinstance(v, UserFunction) or isinstance(v, Literal)]
     return List(keys)
 
-REPL.register("user-symbols", Builtin("user-symbols", interpretUserSymbols, []))
+REPL.register("user-symbols", Builtin("user-symbols", interpretUserSymbols, [], return_type=Type(":list")))