From 22b6a9c1cd36af0db84954f104ff8448aa925f4d Mon Sep 17 00:00:00 2001
From: Jonathan Wakely <jwakely@redhat.com>
Date: Tue, 14 May 2019 13:47:39 +0100
Subject: [PATCH] Reduce header dependencies in <iterator>

	* include/std/iterator: Include <iosfwd> instead of <istream> and
	<ostream>.

From-SVN: r271169
---
 libstdc++-v3/ChangeLog            | 3 +++
 libstdc++-v3/include/std/iterator | 3 +--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 808af37a374f..5d173a5bbde8 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,5 +1,8 @@
 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
 
+	* include/std/iterator: Include <iosfwd> instead of <istream> and
+	<ostream>.
+
 	* include/bits/stl_tree.h (_Rb_tree::erase(const Key*, const Key*)):
 	Remove unused, non-standard function.
 
diff --git a/libstdc++-v3/include/std/iterator b/libstdc++-v3/include/std/iterator
index 9d9e19c4c6bb..28e7c65a9e57 100644
--- a/libstdc++-v3/include/std/iterator
+++ b/libstdc++-v3/include/std/iterator
@@ -61,8 +61,7 @@
 #include <bits/stl_iterator_base_types.h>
 #include <bits/stl_iterator_base_funcs.h>
 #include <bits/stl_iterator.h>
-#include <ostream>
-#include <istream>
+#include <iosfwd>
 #include <bits/stream_iterator.h>
 #include <bits/streambuf_iterator.h>
 #include <bits/range_access.h>
-- 
2.47.2