From: Robert Bradshaw <robertwb@math.washington.edu>
Date: Thu, 17 Jan 2008 08:20:03 +0000 (-0800)
Subject: Warning on ++x and --x
X-Git-Tag: 0.9.6.14~29^2~75
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=270708c20fcc241fc8e35a8efab1bf01cd5c21ae;p=cython.git

Warning on ++x and --x
---

diff --git a/Cython/Compiler/ExprNodes.py b/Cython/Compiler/ExprNodes.py
index 0e8e0987..3ec90009 100644
--- a/Cython/Compiler/ExprNodes.py
+++ b/Cython/Compiler/ExprNodes.py
@@ -2571,6 +2571,8 @@ def unop_node(pos, operator, operand):
     # given operator.
     if isinstance(operand, IntNode) and operator == '-':
         return IntNode(pos = operand.pos, value = -int(operand.value))
+    elif isinstance(operand, UnopNode) and operand.operator == operator:
+        warning(pos, "Python has no increment/decrement operator: %s%sx = %s(%sx) = x" % ((operator,)*4), 5)
     return unop_node_classes[operator](pos, 
         operator = operator, 
         operand = operand)