1 files changed, 81 insertions, 0 deletions
diff --git a/libcxx/include/__iterator/ostreambuf_iterator.h b/libcxx/include/__iterator/ostreambuf_iterator.h
new file mode 100644
index 000000000000..90309dacd429
--- /dev/null
+++ b/libcxx/include/__iterator/ostreambuf_iterator.h
@@ -0,0 +1,81 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP___ITERATOR_OSTREAMBUF_ITERATOR_H
+#define _LIBCPP___ITERATOR_OSTREAMBUF_ITERATOR_H
+
+#include <__config>
+#include <__iterator/iterator.h>
+#include <__iterator/iterator_traits.h>
+#include <iosfwd> // for forward declaration of basic_streambuf
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#pragma GCC system_header
+#endif
+
+_LIBCPP_PUSH_MACROS
+#include <__undef_macros>
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+_LIBCPP_SUPPRESS_DEPRECATED_PUSH
+template <class _CharT, class _Traits>
+class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator
+#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES)
+    : public iterator<output_iterator_tag, void, void, void, void>
+#endif
+{
+_LIBCPP_SUPPRESS_DEPRECATED_POP
+public:
+    typedef output_iterator_tag                 iterator_category;
+    typedef void                                value_type;
+#if _LIBCPP_STD_VER > 17
+    typedef ptrdiff_t                           difference_type;
+#else
+    typedef void                                difference_type;
+#endif
+    typedef void                                pointer;
+    typedef void                                reference;
+    typedef _CharT                              char_type;
+    typedef _Traits                             traits_type;
+    typedef basic_streambuf<_CharT, _Traits>    streambuf_type;
+    typedef basic_ostream<_CharT, _Traits>      ostream_type;
+
+private:
+    streambuf_type* __sbuf_;
+public:
+    _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT
+        : __sbuf_(__s.rdbuf()) {}
+    _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT
+        : __sbuf_(__s) {}
+    _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c)
+        {
+            if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof()))
+                __sbuf_ = nullptr;
+            return *this;
+        }
+    _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*()     {return *this;}
+    _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++()    {return *this;}
+    _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;}
+    _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == nullptr;}
+
+    template <class _Ch, class _Tr>
+    friend
+    _LIBCPP_HIDDEN
+    ostreambuf_iterator<_Ch, _Tr>
+    __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s,
+                     const _Ch* __ob, const _Ch* __op, const _Ch* __oe,
+                     ios_base& __iob, _Ch __fl);
+};
+
+_LIBCPP_END_NAMESPACE_STD
+
+_LIBCPP_POP_MACROS
+
+#endif // _LIBCPP___ITERATOR_OSTREAMBUF_ITERATOR_H