From 9fd33f4864310c017a1013f8d18635c1e784f0ab Mon Sep 17 00:00:00 2001
From: mryouse
Date: Fri, 29 Jul 2022 19:56:22 +0000
Subject: have builtins return :nil when appropriate

---
 neb/std/fs.py | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

(limited to 'neb/std/fs.py')

diff --git a/neb/std/fs.py b/neb/std/fs.py
index b49d63c..8500140 100644
--- a/neb/std/fs.py
+++ b/neb/std/fs.py
@@ -33,9 +33,9 @@ def interpretUnlink(symbol, args, env, ns):
     if not target_path.exists():
         raise InterpretPanic(symbol, "target file does not exist", target_path)
     target_path.unlink()
-    return List([])
+    return Nil()
 
-unlink_func = Builtin("unlink", interpretUnlink, [Arg("filename", TypeEnum.STRING)], return_type=Type(":list"))
+unlink_func = Builtin("unlink", interpretUnlink, [Arg("filename", TypeEnum.STRING)], return_type=Type(":nil"))
 unlink_multi = MultiFunction("unlink")
 unlink_multi.register(unlink_func)
 FS.register("unlink", unlink_multi)
@@ -49,9 +49,9 @@ def interpretWrite(symbol, args, env, ns):
         raise InterpretPanic(symbol, f"{handle} is not writable!")
     except ValueError:
         raise InterpretPanic(symbol, f"{handle} is closed")
-    return List([])
+    return Nil()
 
-write_func = Builtin("write", interpretWrite, [Arg("string", TypeEnum.STRING), Arg("handle", TypeEnum.HANDLE)], return_type=TypeEnum.LIST)
+write_func = Builtin("write", interpretWrite, [Arg("string", TypeEnum.STRING), Arg("handle", TypeEnum.HANDLE)], return_type=Type(":nil"))
 write_multi = MultiFunction("write")
 write_multi.register(write_func)
 FS.register("write", write_multi)
@@ -109,9 +109,9 @@ def interpretClose(symbol, args, env, ns):
         # (close (print (read (open-read "fil.txt"))))
     except:
         raise InterpretPanic(symbol, "cannot close {args[0]}")
-    return List([])
+    return Nil()
 
-close_func = Builtin("close", interpretClose, [Arg("handle", TypeEnum.HANDLE)], return_type=TypeEnum.LIST)
+close_func = Builtin("close", interpretClose, [Arg("handle", TypeEnum.HANDLE)], return_type=Type(":nil"))
 close_multi = MultiFunction("close")
 close_multi.register(close_func)
 FS.register("close", close_multi)
-- 
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