From: Tim Vieira <tim.f.vieira@gmail.com>
Date: Thu, 18 Jul 2013 17:01:19 +0000 (-0400)
Subject: better error msgs.
X-Git-Url: https://hydra-www.ietfng.org/gitweb/?a=commitdiff_plain;h=df4922a940d179c3de3f7cab4afababeaf5f1baf;p=dyna2

better error msgs.
---

diff --git a/src/Dyna/Backend/Python/stdlib.py b/src/Dyna/Backend/Python/stdlib.py
index c6cdd30..b448afb 100644
--- a/src/Dyna/Backend/Python/stdlib.py
+++ b/src/Dyna/Backend/Python/stdlib.py
@@ -8,17 +8,20 @@ from glob import glob
 
 def or_(x, y):
     if not (isbool(x) and isbool(y)):
-        raise TypeError('')
+        raise TypeError('`|` expected Boolean arguments, got `%s` and `%s`' \
+                            % (type(x).__name__, type(y).__name__))
     return todyna(x or y)
 
 def and_(x, y):
     if not (isbool(x) and isbool(y)):
-        raise TypeError('')
+        raise TypeError('`&` expected Boolean arguments, got `%s` and `%s`' \
+                            % (type(x).__name__, type(y).__name__))
     return todyna(x and y)
 
 def not_(x):
     if not isbool(x):
-        raise TypeError(repr(x))
+        raise TypeError('`!` expected Boolean arguments, got `%s`' \
+                            % type(x).__name__)
     if x:
         return false
     else: