# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1490459015 -3600
# Node ID 071b38ef10ea06109de9bff13f328c9914406513
# Parent  05b1244072d864f67d0c54b81440b2d87e6d817b
Fixed xrange lengths when the step does not coincide with the range end.

diff -r 05b1244072d8 -r 071b38ef10ea lib/__builtins__/span.py
--- a/lib/__builtins__/span.py	Sat Mar 25 16:41:06 2017 +0100
+++ b/lib/__builtins__/span.py	Sat Mar 25 17:23:35 2017 +0100
@@ -73,7 +73,12 @@
 
         "Return the length of the range."
 
-        return (self.end - self.start) / self.step
+        n = (self.end - self.start) / self.step
+        last = self.start + (n * self.step)
+        if last == self.end:
+            return n
+        else:
+            return n + 1
 
     def __iter__(self):
 
diff -r 05b1244072d8 -r 071b38ef10ea tests/range.py
--- a/tests/range.py	Sat Mar 25 16:41:06 2017 +0100
+++ b/tests/range.py	Sat Mar 25 17:23:35 2017 +0100
@@ -59,3 +59,9 @@
 double = xrange(3, 5, 1)
 print list(double)                          # [3, 4]
 print reduce(lambda x, y: x+y, double)      # [7]
+
+# Test steps not coinciding with the end.
+
+beyond = xrange(4, 9, 2)
+print list(beyond)                          # [4, 6, 8]
+print len(beyond)                           # 3