From 34fc2466268ab2ba37d020335d08e7550fe8eecd Mon Sep 17 00:00:00 2001
From: Michele Simionato <michele.simionato@gmail.com>
Date: Mon, 20 Jul 2015 12:27:10 +0200
Subject: Added check on the dispatch arguments

---
 src/decorator.py | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src')

diff --git a/src/decorator.py b/src/decorator.py
index 28ec16a..e6d456d 100644
--- a/src/decorator.py
+++ b/src/decorator.py
@@ -286,6 +286,10 @@ def dispatch_on(*dispatch_args):
     dispatch_str = '(%s,)' % ', '.join(dispatch_args)
 
     def generic(func):
+        # first check the dispatch arguments
+        argset = set(inspect.getargspec(func).args)
+        if not set(dispatch_args) <= argset:
+            raise NameError('Unknown dispatch arguments %s' % dispatch_str)
 
         typemap = {(object,) * len(dispatch_args): func}
 
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