[libcxx] r259014 - implement ostream_joiner. Reviewed as http://reviews.llvm.org/D16605

Marshall Clow via cfe-commits cfe-commits at lists.llvm.org
Wed Jan 27 20:14:56 PST 2016


Author: marshall
Date: Wed Jan 27 22:14:56 2016
New Revision: 259014

URL: http://llvm.org/viewvc/llvm-project?rev=259014&view=rev
Log:
implement ostream_joiner. Reviewed as http://reviews.llvm.org/D16605

Added:
    libcxx/trunk/test/std/experimental/iterator/
    libcxx/trunk/test/std/experimental/iterator/nothing_to_do.pass.cpp
    libcxx/trunk/test/std/experimental/iterator/ostream.joiner/
    libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.cons/
    libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.cons/ostream_joiner.cons.pass.cpp
    libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.creation/
    libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.creation/make_ostream_joiner.pass.cpp
    libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/
    libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.assign.pass.cpp
    libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.postincrement.pass.cpp
    libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.pretincrement.pass.cpp
    libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.star.pass.cpp

Added: libcxx/trunk/test/std/experimental/iterator/nothing_to_do.pass.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/experimental/iterator/nothing_to_do.pass.cpp?rev=259014&view=auto
==============================================================================
--- libcxx/trunk/test/std/experimental/iterator/nothing_to_do.pass.cpp (added)
+++ libcxx/trunk/test/std/experimental/iterator/nothing_to_do.pass.cpp Wed Jan 27 22:14:56 2016
@@ -0,0 +1,12 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include <experimental/iterator>
+
+int main () {}

Added: libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.cons/ostream_joiner.cons.pass.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.cons/ostream_joiner.cons.pass.cpp?rev=259014&view=auto
==============================================================================
--- libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.cons/ostream_joiner.cons.pass.cpp (added)
+++ libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.cons/ostream_joiner.cons.pass.cpp Wed Jan 27 22:14:56 2016
@@ -0,0 +1,58 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11
+
+// <experimental/iterator>
+//
+// template <class _Delim, class _CharT = char, class _Traits = char_traits<_CharT>>
+//   class ostream_joiner;
+//
+//     ostream_joiner(ostream_type& __os, _Delim&& __d);
+//     ostream_joiner(ostream_type& __os, const _Delim& __d);
+
+#include <experimental/iterator>
+#include <iostream>
+#include <string>
+
+#include "test_macros.h"
+
+namespace exp = std::experimental;
+
+int main () {
+	const char eight = '8';
+	const std::string nine = "9";
+	const std::wstring ten = L"10";
+	const int eleven = 11;
+
+//	Narrow streams w/rvalues
+	{ exp::ostream_joiner<char>         oj(std::cout, '8'); } 
+	{ exp::ostream_joiner<std::string>  oj(std::cout, std::string("9")); } 
+	{ exp::ostream_joiner<std::wstring> oj(std::cout, std::wstring(L"10")); } 
+	{ exp::ostream_joiner<int>          oj(std::cout, 11); } 
+
+//	Narrow streams w/lvalues
+	{ exp::ostream_joiner<char>         oj(std::cout, eight); } 
+	{ exp::ostream_joiner<std::string>  oj(std::cout, nine); } 
+	{ exp::ostream_joiner<std::wstring> oj(std::cout, ten); } 
+	{ exp::ostream_joiner<int>          oj(std::cout, eleven); } 
+
+//	Wide streams w/rvalues
+	{ exp::ostream_joiner<char, wchar_t>         oj(std::wcout, '8'); } 
+	{ exp::ostream_joiner<std::string, wchar_t>  oj(std::wcout, std::string("9")); } 
+	{ exp::ostream_joiner<std::wstring, wchar_t> oj(std::wcout, std::wstring(L"10")); } 
+	{ exp::ostream_joiner<int, wchar_t>          oj(std::wcout, 11); } 
+
+//	Wide streams w/lvalues
+	{ exp::ostream_joiner<char, wchar_t>         oj(std::wcout, eight); } 
+	{ exp::ostream_joiner<std::string, wchar_t>  oj(std::wcout, nine); } 
+	{ exp::ostream_joiner<std::wstring, wchar_t> oj(std::wcout, ten); } 
+	{ exp::ostream_joiner<int, wchar_t>          oj(std::wcout, eleven); } 
+
+	}

Added: libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.creation/make_ostream_joiner.pass.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.creation/make_ostream_joiner.pass.cpp?rev=259014&view=auto
==============================================================================
--- libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.creation/make_ostream_joiner.pass.cpp (added)
+++ libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.creation/make_ostream_joiner.pass.cpp Wed Jan 27 22:14:56 2016
@@ -0,0 +1,53 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11
+
+// <experimental/iterator>
+//
+// template <class _Delim, class _CharT = char, class _Traits = char_traits<_CharT>>
+//   class ostream_joiner;
+//
+//   template <class _CharT, class _Traits, class _Delim>
+//   ostream_joiner<typename decay<_Delim>::type, _CharT, _Traits>
+//   make_ostream_joiner(basic_ostream<_CharT, _Traits>& __os, _Delim && __d);
+//
+
+#include <experimental/iterator>
+#include <iostream>
+#include <sstream>
+#include <cassert>
+
+#include "test_macros.h"
+#include "test_iterators.h"
+
+namespace exp = std::experimental;
+
+template <class Delim, class Iter, class CharT = char, class Traits = std::char_traits<CharT>>
+void test (Delim &&d, Iter first, Iter last, const CharT *expected ) {
+    std::basic_stringstream<CharT, Traits> sstream;
+    auto joiner = exp::make_ostream_joiner(sstream, d);
+    typedef exp::ostream_joiner<typename std::decay<Delim>::type, CharT, Traits> Joiner;
+    static_assert((std::is_same<decltype(joiner), Joiner>::value), "" );
+    while (first != last)
+        joiner = *first++;
+    assert(sstream.str() == expected);
+    }
+
+int main () {
+    const char chars[] = "0123456789";
+    const int  ints [] = { 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 };
+
+//  There are more of these tests in another file.
+//  This is just to make sure that the ostream_joiner is created correctly
+    test('X', chars, chars+10, "0X1X2X3X4X5X6X7X8X9");
+    test('x', ints,  ints+10,  "10x11x12x13x14x15x16x17x18x19");
+    test("Z", chars, chars+10, "0Z1Z2Z3Z4Z5Z6Z7Z8Z9");
+    test("z", ints,  ints+10,  "10z11z12z13z14z15z16z17z18z19");
+    }

Added: libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.assign.pass.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.assign.pass.cpp?rev=259014&view=auto
==============================================================================
--- libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.assign.pass.cpp (added)
+++ libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.assign.pass.cpp Wed Jan 27 22:14:56 2016
@@ -0,0 +1,120 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11
+
+// <experimental/iterator>
+//
+// template <class _Delim, class _CharT = char, class _Traits = char_traits<_CharT>>
+//   class ostream_joiner;
+//
+//   template<typename T>
+//   ostream_joiner & operator=(const T&)
+//
+
+#include <experimental/iterator>
+#include <iostream>
+#include <sstream>
+#include <cassert>
+
+#include "test_macros.h"
+#include "test_iterators.h"
+
+struct mutating_delimiter {
+	mutating_delimiter(char c = ' ') : c_(c) {}
+	char get () const { return c_++; }
+	mutable char c_;
+	};
+
+template<class _CharT, class _Traits>
+std::basic_ostream<_CharT, _Traits>&
+operator<<(std::basic_ostream<_CharT, _Traits>& os, const mutating_delimiter &d)
+{ return os << d.get(); }
+
+
+struct mutating_delimiter2 { // same as above, w/o the const and the mutable
+	mutating_delimiter2(char c = ' ') : c_(c) {}
+	char get () { return c_++; }
+	char c_;
+	};
+
+template<class _CharT, class _Traits>
+std::basic_ostream<_CharT, _Traits>&
+operator<<(std::basic_ostream<_CharT, _Traits>& os, mutating_delimiter2 &d)
+{ return os << d.get(); }
+
+
+namespace exp = std::experimental;
+
+template <class Delim, class Iter, class CharT = char, class Traits = std::char_traits<CharT>>
+void test (Delim &&d, Iter first, Iter last, const CharT *expected ) {
+	typedef exp::ostream_joiner<typename std::decay<Delim>::type, CharT, Traits> Joiner;
+
+	static_assert((std::is_copy_constructible<Joiner>::value == std::is_copy_constructible<typename std::decay<Delim>::type>::value), "" );
+	static_assert((std::is_move_constructible<Joiner>::value == std::is_move_constructible<typename std::decay<Delim>::type>::value), "" );
+	static_assert((std::is_copy_assignable<Joiner>   ::value == std::is_copy_assignable<typename std::decay<Delim>::type>   ::value), "" );
+	static_assert((std::is_move_assignable<Joiner>   ::value == std::is_move_assignable<typename std::decay<Delim>::type>   ::value), "" );
+
+	std::basic_stringstream<CharT, Traits> sstream;
+	Joiner joiner(sstream, d);
+	while (first != last)
+		*joiner++ = *first++;
+	assert(sstream.str() == expected);
+	}
+
+int main () {
+{
+	const char chars[] = "0123456789";
+	const int  ints [] = { 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 };
+
+	test('X', chars, chars+10, "0X1X2X3X4X5X6X7X8X9");
+	test('x',  ints,  ints+10, "10x11x12x13x14x15x16x17x18x19");
+	test('X', input_iterator<const char*>(chars),         input_iterator<const char*>(chars+10),         "0X1X2X3X4X5X6X7X8X9");
+	test('x', input_iterator<const int*>(ints),           input_iterator<const int*>(ints+10),           "10x11x12x13x14x15x16x17x18x19");
+	test('X', forward_iterator<const char*>(chars),       forward_iterator<const char*>(chars+10),       "0X1X2X3X4X5X6X7X8X9");
+	test('x', forward_iterator<const int*>(ints),         forward_iterator<const int*>(ints+10),         "10x11x12x13x14x15x16x17x18x19");
+	test('X', random_access_iterator<const char*>(chars), random_access_iterator<const char*>(chars+10), "0X1X2X3X4X5X6X7X8X9");
+	test('x', random_access_iterator<const int*>(ints),   random_access_iterator<const int*>(ints+10),   "10x11x12x13x14x15x16x17x18x19");
+
+	test("Z", chars, chars+10, "0Z1Z2Z3Z4Z5Z6Z7Z8Z9");
+	test("z", ints,  ints+10,  "10z11z12z13z14z15z16z17z18z19");
+
+	test<char, const char *, wchar_t> ('X', chars, chars+10, L"0X1X2X3X4X5X6X7X8X9");
+	test<char, const int *,  wchar_t> ('x',  ints,  ints+10, L"10x11x12x13x14x15x16x17x18x19");
+// 	test<char, const char *, char16_t>('X', chars, chars+10, u"0X1X2X3X4X5X6X7X8X9");
+// 	test<char, const int *,  char16_t>('x',  ints,  ints+10, u"10x11x12x13x14x15x16x17x18x19");
+// 	test<char, const char *, char32_t>('X', chars, chars+10, U"0X1X2X3X4X5X6X7X8X9");
+// 	test<char, const int *,  char32_t>('x',  ints,  ints+10, U"10x11x12x13x14x15x16x17x18x19");
+
+	test(mutating_delimiter(),  chars, chars+10, "0 1!2\"3#4$5%6&7'8(9");
+	test(mutating_delimiter2(), chars, chars+10, "0 1!2\"3#4$5%6&7'8(9");
+	}
+	
+	{
+	const wchar_t chars[] = L"0123456789";
+	const int  ints [] = { 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 };
+	test(L'X', chars, chars+10, L"0X1X2X3X4X5X6X7X8X9");
+	test(L'x',  ints,  ints+10, L"10x11x12x13x14x15x16x17x18x19");
+	test(L'X', input_iterator<const wchar_t*>(chars),         input_iterator<const wchar_t*>(chars+10),         L"0X1X2X3X4X5X6X7X8X9");
+	test(L'x', input_iterator<const int*>(ints),              input_iterator<const int*>(ints+10),              L"10x11x12x13x14x15x16x17x18x19");
+	test(L'X', forward_iterator<const wchar_t*>(chars),       forward_iterator<const wchar_t*>(chars+10),       L"0X1X2X3X4X5X6X7X8X9");
+	test(L'x', forward_iterator<const int*>(ints),            forward_iterator<const int*>(ints+10),            L"10x11x12x13x14x15x16x17x18x19");
+	test(L'X', random_access_iterator<const wchar_t*>(chars), random_access_iterator<const wchar_t*>(chars+10), L"0X1X2X3X4X5X6X7X8X9");
+	test(L'x', random_access_iterator<const int*>(ints),      random_access_iterator<const int*>(ints+10),      L"10x11x12x13x14x15x16x17x18x19");
+
+	test(L"Z", chars, chars+10, L"0Z1Z2Z3Z4Z5Z6Z7Z8Z9");
+	test(L"z", ints,  ints+10,  L"10z11z12z13z14z15z16z17z18z19");
+
+	test<char, const wchar_t *, wchar_t> ('X', chars, chars+10, L"0X1X2X3X4X5X6X7X8X9");
+	test<char, const int *,  wchar_t>    ('x',  ints,  ints+10, L"10x11x12x13x14x15x16x17x18x19");
+
+	test(mutating_delimiter(), chars, chars+10, L"0 1!2\"3#4$5%6&7'8(9");
+	}
+
+}

Added: libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.postincrement.pass.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.postincrement.pass.cpp?rev=259014&view=auto
==============================================================================
--- libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.postincrement.pass.cpp (added)
+++ libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.postincrement.pass.cpp Wed Jan 27 22:14:56 2016
@@ -0,0 +1,46 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11
+
+// <experimental/iterator>
+//
+// template <class _Delim, class _CharT = char, class _Traits = char_traits<_CharT>>
+//   class ostream_joiner;
+//
+//   ostream_joiner & operator++(int) noexcept
+//     returns *this;
+
+#include <experimental/iterator>
+#include <iostream>
+#include <cassert>
+
+#include "test_macros.h"
+
+namespace exp = std::experimental;
+
+template <class Delim, class CharT, class Traits>
+void test ( exp::ostream_joiner<Delim, CharT, Traits> &oj ) {
+    static_assert((noexcept(oj++)), "" );
+    exp::ostream_joiner<Delim, CharT, Traits> &ret = oj++;
+    assert( &ret == &oj );
+    }
+
+int main () {
+
+    { exp::ostream_joiner<char>         oj(std::cout, '8');                 test(oj); }
+    { exp::ostream_joiner<std::string>  oj(std::cout, std::string("9"));    test(oj); }
+    { exp::ostream_joiner<std::wstring> oj(std::cout, std::wstring(L"10")); test(oj); }
+    { exp::ostream_joiner<int>          oj(std::cout, 11);                  test(oj); }
+
+    { exp::ostream_joiner<char, wchar_t>         oj(std::wcout, '8');                 test(oj); }
+    { exp::ostream_joiner<std::string, wchar_t>  oj(std::wcout, std::string("9"));    test(oj); }
+    { exp::ostream_joiner<std::wstring, wchar_t> oj(std::wcout, std::wstring(L"10")); test(oj); }
+    { exp::ostream_joiner<int, wchar_t>          oj(std::wcout, 11);                  test(oj); }
+    }

Added: libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.pretincrement.pass.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.pretincrement.pass.cpp?rev=259014&view=auto
==============================================================================
--- libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.pretincrement.pass.cpp (added)
+++ libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.pretincrement.pass.cpp Wed Jan 27 22:14:56 2016
@@ -0,0 +1,46 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11
+
+// <experimental/iterator>
+//
+// template <class _Delim, class _CharT = char, class _Traits = char_traits<_CharT>>
+//   class ostream_joiner;
+//
+//   ostream_joiner & operator++() noexcept
+//     returns *this;
+
+#include <experimental/iterator>
+#include <iostream>
+#include <cassert>
+
+#include "test_macros.h"
+
+namespace exp = std::experimental;
+
+template <class Delim, class CharT, class Traits>
+void test ( exp::ostream_joiner<Delim, CharT, Traits> &oj ) {
+    static_assert((noexcept(++oj)), "" );
+    exp::ostream_joiner<Delim, CharT, Traits> &ret = ++oj;
+    assert( &ret == &oj );
+    }
+
+int main () {
+
+    { exp::ostream_joiner<char>         oj(std::cout, '8');                 test(oj); }
+    { exp::ostream_joiner<std::string>  oj(std::cout, std::string("9"));    test(oj); }
+    { exp::ostream_joiner<std::wstring> oj(std::cout, std::wstring(L"10")); test(oj); }
+    { exp::ostream_joiner<int>          oj(std::cout, 11);                  test(oj); }
+
+    { exp::ostream_joiner<char, wchar_t>         oj(std::wcout, '8');                 test(oj); }
+    { exp::ostream_joiner<std::string, wchar_t>  oj(std::wcout, std::string("9"));    test(oj); }
+    { exp::ostream_joiner<std::wstring, wchar_t> oj(std::wcout, std::wstring(L"10")); test(oj); }
+    { exp::ostream_joiner<int, wchar_t>          oj(std::wcout, 11);                  test(oj); }
+    }

Added: libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.star.pass.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.star.pass.cpp?rev=259014&view=auto
==============================================================================
--- libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.star.pass.cpp (added)
+++ libcxx/trunk/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.star.pass.cpp Wed Jan 27 22:14:56 2016
@@ -0,0 +1,46 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11
+
+// <experimental/iterator>
+//
+// template <class _Delim, class _CharT = char, class _Traits = char_traits<_CharT>>
+//   class ostream_joiner;
+//
+//   ostream_joiner & operator*() noexcept
+//     returns *this;
+
+#include <experimental/iterator>
+#include <iostream>
+#include <cassert>
+
+#include "test_macros.h"
+
+namespace exp = std::experimental;
+
+template <class Delim, class CharT, class Traits>
+void test ( exp::ostream_joiner<Delim, CharT, Traits> &oj ) {
+    static_assert((noexcept(*oj)), "" );
+    exp::ostream_joiner<Delim, CharT, Traits> &ret = *oj;
+    assert( &ret == &oj );
+    }
+
+int main () {
+
+    { exp::ostream_joiner<char>         oj(std::cout, '8');                 test(oj); }
+    { exp::ostream_joiner<std::string>  oj(std::cout, std::string("9"));    test(oj); }
+    { exp::ostream_joiner<std::wstring> oj(std::cout, std::wstring(L"10")); test(oj); }
+    { exp::ostream_joiner<int>          oj(std::cout, 11);                  test(oj); }
+
+    { exp::ostream_joiner<char, wchar_t>         oj(std::wcout, '8');                 test(oj); }
+    { exp::ostream_joiner<std::string, wchar_t>  oj(std::wcout, std::string("9"));    test(oj); }
+    { exp::ostream_joiner<std::wstring, wchar_t> oj(std::wcout, std::wstring(L"10")); test(oj); }
+    { exp::ostream_joiner<int, wchar_t>          oj(std::wcout, 11);                  test(oj); }
+    }




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