[pypy-svn] r47452 - pypy/dist/pypy/rpython/lltypesystem

[arigo at codespeak.net]

Author: arigo
Date: Sun Oct 14 21:13:38 2007
New Revision: 47452

Modified:
   pypy/dist/pypy/rpython/lltypesystem/ll2ctypes.py
Log:
Better error message when we switch the two arguments to rffi.cast()


Modified: pypy/dist/pypy/rpython/lltypesystem/ll2ctypes.py
==============================================================================
--- pypy/dist/pypy/rpython/lltypesystem/ll2ctypes.py	(original)
+++ pypy/dist/pypy/rpython/lltypesystem/ll2ctypes.py	Sun Oct 14 21:13:38 2007
@@ -599,6 +599,8 @@
 
 def force_cast(RESTYPE, value):
     """Cast a value to a result type, trying to use the same rules as C."""
+    if not isinstance(RESTYPE, lltype.LowLevelType):
+        raise TypeError("rffi.cast() first arg should be a TYPE")
     TYPE1 = lltype.typeOf(value)
     cvalue = lltype2ctypes(value)
     cresulttype = get_ctypes_type(RESTYPE)