# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1560009332 -7200
# Node ID 018b653418f2435efb75fca2b284e079723fd881
# Parent  97fb61c1a87145b30edcee471b3037bca13afd76
Added an optional iterator attribute to StopIteration.

diff -r 97fb61c1a871 -r 018b653418f2 lib/__builtins__/exception/base.py
--- a/lib/__builtins__/exception/base.py	Sat Jun 08 17:54:53 2019 +0200
+++ b/lib/__builtins__/exception/base.py	Sat Jun 08 17:55:32 2019 +0200
@@ -71,7 +71,11 @@
 
     "An exception signalling the end of iteration."
 
-    pass
+    def __init__(self, .iterator=None):
+
+        "Initialise the exception with the given 'iterator'."
+
+        pass
 
 class ValueError(Exception):
 
diff -r 97fb61c1a871 -r 018b653418f2 lib/__builtins__/iteration/iterator.py
--- a/lib/__builtins__/iteration/iterator.py	Sat Jun 08 17:54:53 2019 +0200
+++ b/lib/__builtins__/iteration/iterator.py	Sat Jun 08 17:55:32 2019 +0200
@@ -3,7 +3,7 @@
 """
 Iterator objects.
 
-Copyright (C) 2015, 2016 Paul Boddie <paul@boddie.org.uk>
+Copyright (C) 2015, 2016, 2019 Paul Boddie <paul@boddie.org.uk>
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -39,6 +39,6 @@
             self.i += 1
             return value
         except IndexError:
-            raise StopIteration()
+            raise StopIteration, self
 
 # vim: tabstop=4 expandtab shiftwidth=4
diff -r 97fb61c1a871 -r 018b653418f2 lib/__builtins__/set.py
--- a/lib/__builtins__/set.py	Sat Jun 08 17:54:53 2019 +0200
+++ b/lib/__builtins__/set.py	Sat Jun 08 17:55:32 2019 +0200
@@ -3,7 +3,7 @@
 """
 Set objects.
 
-Copyright (C) 2015, 2016, 2017 Paul Boddie <paul@boddie.org.uk>
+Copyright (C) 2015, 2016, 2017, 2019 Paul Boddie <paul@boddie.org.uk>
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -323,7 +323,7 @@
             try:
                 bucket = self.mapping.buckets[self.index]
             except IndexError:
-                raise StopIteration
+                raise StopIteration, self
 
             # Access the current item. If no such item exists, get another
             # bucket.
diff -r 97fb61c1a871 -r 018b653418f2 lib/__builtins__/span.py
--- a/lib/__builtins__/span.py	Sat Jun 08 17:54:53 2019 +0200
+++ b/lib/__builtins__/span.py	Sat Jun 08 17:55:32 2019 +0200
@@ -3,7 +3,7 @@
 """
 Span-related objects.
 
-Copyright (C) 2015, 2016, 2017, 2018 Paul Boddie <paul@boddie.org.uk>
+Copyright (C) 2015, 2016, 2017, 2018, 2019 Paul Boddie <paul@boddie.org.uk>
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -101,7 +101,7 @@
         "Return the next item or raise a StopIteration exception."
 
         if not self.count:
-            raise StopIteration
+            raise StopIteration, self
 
         current = self.current
         self.current = self.current.__add__(self.step)