# HG changeset patch
# User jruigrok
# Date 1270977049 0
# Node ID 580528227e55c7f7449643ef5134785f4bc02bb3
# Parent  9020d6780181817e04f6f0bf78fa245ebe8b5fa7
Merged revisions 458 via svnmerge from
http://svn.edgewall.org/repos/babel/trunk

........
  r458 | aronacher | 2008-10-31 17:13:59 +0100 (vr, 31 okt 2008) | 3 lines

  Removed `ValueError` raising for string formatting message checkers if the string does not contain any string formattings.  The new behavior is undefined.  This fixes at least one of the problems of the #150 ticket.
........

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -18,6 +18,8 @@
  * Add a __ne__() method to the Local class.
  * Explicitly sort instead of using sorted() and don't assume ordering
    (Python 2.3 and Jython compatibility).
+ * Removed ValueError raising for string formatting message checkers if the
+   string does not contain any string formattings (ticket #150).
 
 
 Version 0.9.5
diff --git a/babel/messages/checkers.py b/babel/messages/checkers.py
--- a/babel/messages/checkers.py
+++ b/babel/messages/checkers.py
@@ -69,7 +69,8 @@
     arguments are not interchangeable as `alternative` may contain less
     placeholders if `format` uses named placeholders.
 
-    If `format` does not use string formatting a `ValueError` is raised.
+    The behavior of this function is undefined if the string does not use
+    string formattings.
 
     If the string formatting of `alternative` is compatible to `format` the
     function returns `None`, otherwise a `TranslationError` is raised.
@@ -125,13 +126,6 @@
 
     a, b = map(_parse, (format, alternative))
 
-    # if a does not use string formattings, we are dealing with invalid
-    # input data.  This function only works if the first string provided
-    # does contain string format chars
-    if not a:
-        raise ValueError('original string provided does not use string '
-                         'formatting.')
-
     # now check if both strings are positional or named
     a_positional, b_positional = map(_check_positional, (a, b))
     if a_positional and not b_positional and not b: