Move test into test/std subdirectory.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@224658 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/strings/basic.string/string.modifiers/string_erase/erase_iter_db1.pass.cpp

@@ -0,0 +1,50 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// Call erase(const_iterator position) with end()
+
+#if _LIBCPP_DEBUG >= 1
+
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+
+#include <string>
+#include <cassert>
+#include <cstdlib>
+#include <exception>
+
+#include "min_allocator.h"
+
+int main()
+{
+    {
+    std::string l1("123");
+    std::string::const_iterator i = l1.end();
+    l1.erase(i);
+    assert(false);
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    S l1("123");
+    S::const_iterator i = l1.end();
+    l1.erase(i);
+    assert(false);
+    }
+#endif
+}
+
+#else
+
+int main()
+{
+}
+
+#endif

test/std/strings/basic.string/string.modifiers/string_erase/erase_iter_db2.pass.cpp

@@ -0,0 +1,52 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// Call erase(const_iterator position) with iterator from another container
+
+#if _LIBCPP_DEBUG >= 1
+
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+
+#include <string>
+#include <cassert>
+#include <cstdlib>
+#include <exception>
+
+#include "min_allocator.h"
+
+int main()
+{
+    {
+    std::string l1("123");
+    std::string l2("123");
+    std::string::const_iterator i = l2.begin();
+    l1.erase(i);
+    assert(false);
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    S l1("123");
+    S l2("123");
+    S::const_iterator i = l2.begin();
+    l1.erase(i);
+    assert(false);
+    }
+#endif
+}
+
+#else
+
+int main()
+{
+}
+
+#endif

test/std/strings/basic.string/string.modifiers/string_erase/erase_iter_iter_db1.pass.cpp

@@ -0,0 +1,50 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// Call erase(const_iterator first, const_iterator last); with first iterator from another container
+
+#if _LIBCPP_DEBUG >= 1
+
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+
+#include <string>
+#include <cassert>
+#include <exception>
+#include <cstdlib>
+
+#include "min_allocator.h"
+
+int main()
+{
+    {
+    std::string l1("123");
+    std::string l2("123");
+    std::string::iterator i = l1.erase(l2.cbegin(), l1.cbegin()+1);
+    assert(false);
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    S l1("123");
+    S l2("123");
+    S::iterator i = l1.erase(l2.cbegin(), l1.cbegin()+1);
+    assert(false);
+    }
+#endif
+}
+
+#else
+
+int main()
+{
+}
+
+#endif

test/std/strings/basic.string/string.modifiers/string_erase/erase_iter_iter_db2.pass.cpp

@@ -0,0 +1,50 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// Call erase(const_iterator first, const_iterator last); with second iterator from another container
+
+#if _LIBCPP_DEBUG >= 1
+
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+
+#include <string>
+#include <cassert>
+#include <exception>
+#include <cstdlib>
+
+#include "min_allocator.h"
+
+int main()
+{
+    {
+    std::string l1("123");
+    std::string l2("123");
+    std::string::iterator i = l1.erase(l1.cbegin(), l2.cbegin()+1);
+    assert(false);
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    S l1("123");
+    S l2("123");
+    S::iterator i = l1.erase(l1.cbegin(), l2.cbegin()+1);
+    assert(false);
+    }
+#endif
+}
+
+#else
+
+int main()
+{
+}
+
+#endif

test/std/strings/basic.string/string.modifiers/string_erase/erase_iter_iter_db3.pass.cpp

@@ -0,0 +1,50 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// Call erase(const_iterator first, const_iterator last); with both iterators from another container
+
+#if _LIBCPP_DEBUG >= 1
+
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+
+#include <string>
+#include <cassert>
+#include <exception>
+#include <cstdlib>
+
+#include "min_allocator.h"
+
+int main()
+{
+    {
+    std::string l1("123");
+    std::string l2("123");
+    std::string::iterator i = l1.erase(l2.cbegin(), l2.cbegin()+1);
+    assert(false);
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    S l1("123");
+    S l2("123");
+    S::iterator i = l1.erase(l2.cbegin(), l2.cbegin()+1);
+    assert(false);
+    }
+#endif
+}
+
+#else
+
+int main()
+{
+}
+
+#endif

test/std/strings/basic.string/string.modifiers/string_erase/erase_iter_iter_db4.pass.cpp

@@ -0,0 +1,48 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// Call erase(const_iterator first, const_iterator last); with a bad range
+
+#if _LIBCPP_DEBUG >= 1
+
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+
+#include <string>
+#include <cassert>
+#include <exception>
+#include <cstdlib>
+
+#include "min_allocator.h"
+
+int main()
+{
+    {
+    std::string l1("123");
+    std::string::iterator i = l1.erase(l1.cbegin()+1, l1.cbegin());
+    assert(false);
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    S l1("123");
+    S::iterator i = l1.erase(l1.cbegin()+1, l1.cbegin());
+    assert(false);
+    }
+#endif
+}
+
+#else
+
+int main()
+{
+}
+
+#endif

test/std/strings/basic.string/string.modifiers/string_erase/iter.pass.cpp

@@ -0,0 +1,64 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// iterator erase(const_iterator p);
+
+#include <string>
+#include <cassert>
+
+#include "min_allocator.h"
+
+template <class S>
+void
+test(S s, typename S::difference_type pos, S expected)
+{
+    typename S::const_iterator p = s.begin() + pos;
+    typename S::iterator i = s.erase(p);
+    assert(s.__invariants());
+    assert(s == expected);
+    assert(i - s.begin() == pos);
+}
+
+int main()
+{
+    {
+    typedef std::string S;
+    test(S("abcde"), 0, S("bcde"));
+    test(S("abcde"), 1, S("acde"));
+    test(S("abcde"), 2, S("abde"));
+    test(S("abcde"), 4, S("abcd"));
+    test(S("abcdefghij"), 0, S("bcdefghij"));
+    test(S("abcdefghij"), 1, S("acdefghij"));
+    test(S("abcdefghij"), 5, S("abcdeghij"));
+    test(S("abcdefghij"), 9, S("abcdefghi"));
+    test(S("abcdefghijklmnopqrst"), 0, S("bcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 1, S("acdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 10, S("abcdefghijlmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 19, S("abcdefghijklmnopqrs"));
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    test(S("abcde"), 0, S("bcde"));
+    test(S("abcde"), 1, S("acde"));
+    test(S("abcde"), 2, S("abde"));
+    test(S("abcde"), 4, S("abcd"));
+    test(S("abcdefghij"), 0, S("bcdefghij"));
+    test(S("abcdefghij"), 1, S("acdefghij"));
+    test(S("abcdefghij"), 5, S("abcdeghij"));
+    test(S("abcdefghij"), 9, S("abcdefghi"));
+    test(S("abcdefghijklmnopqrst"), 0, S("bcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 1, S("acdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 10, S("abcdefghijlmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 19, S("abcdefghijklmnopqrs"));
+    }
+#endif
+}

test/std/strings/basic.string/string.modifiers/string_erase/iter_iter.pass.cpp

@@ -0,0 +1,149 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// iterator erase(const_iterator first, const_iterator last);
+
+#include <string>
+#include <cassert>
+
+#include "min_allocator.h"
+
+template <class S>
+void
+test(S s, typename S::difference_type pos, typename S::difference_type n, S expected)
+{
+    typename S::const_iterator first = s.cbegin() + pos;
+    typename S::const_iterator last = s.cbegin() + pos + n;
+    typename S::iterator i = s.erase(first, last);
+    assert(s.__invariants());
+    assert(s == expected);
+    assert(i - s.begin() == pos);
+}
+
+int main()
+{
+    {
+    typedef std::string S;
+    test(S(""), 0, 0, S(""));
+    test(S("abcde"), 0, 0, S("abcde"));
+    test(S("abcde"), 0, 1, S("bcde"));
+    test(S("abcde"), 0, 2, S("cde"));
+    test(S("abcde"), 0, 4, S("e"));
+    test(S("abcde"), 0, 5, S(""));
+    test(S("abcde"), 1, 0, S("abcde"));
+    test(S("abcde"), 1, 1, S("acde"));
+    test(S("abcde"), 1, 2, S("ade"));
+    test(S("abcde"), 1, 3, S("ae"));
+    test(S("abcde"), 1, 4, S("a"));
+    test(S("abcde"), 2, 0, S("abcde"));
+    test(S("abcde"), 2, 1, S("abde"));
+    test(S("abcde"), 2, 2, S("abe"));
+    test(S("abcde"), 2, 3, S("ab"));
+    test(S("abcde"), 4, 0, S("abcde"));
+    test(S("abcde"), 4, 1, S("abcd"));
+    test(S("abcde"), 5, 0, S("abcde"));
+    test(S("abcdefghij"), 0, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 0, 1, S("bcdefghij"));
+    test(S("abcdefghij"), 0, 5, S("fghij"));
+    test(S("abcdefghij"), 0, 9, S("j"));
+    test(S("abcdefghij"), 0, 10, S(""));
+    test(S("abcdefghij"), 1, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 1, 1, S("acdefghij"));
+    test(S("abcdefghij"), 1, 4, S("afghij"));
+    test(S("abcdefghij"), 1, 8, S("aj"));
+    test(S("abcdefghij"), 1, 9, S("a"));
+    test(S("abcdefghij"), 5, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 5, 1, S("abcdeghij"));
+    test(S("abcdefghij"), 5, 2, S("abcdehij"));
+    test(S("abcdefghij"), 5, 4, S("abcdej"));
+    test(S("abcdefghij"), 5, 5, S("abcde"));
+    test(S("abcdefghij"), 9, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 9, 1, S("abcdefghi"));
+    test(S("abcdefghij"), 10, 0, S("abcdefghij"));
+    test(S("abcdefghijklmnopqrst"), 0, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 0, 1, S("bcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 0, 10, S("klmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 0, 19, S("t"));
+    test(S("abcdefghijklmnopqrst"), 0, 20, S(""));
+    test(S("abcdefghijklmnopqrst"), 1, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 1, 1, S("acdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 1, 9, S("aklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 1, 18, S("at"));
+    test(S("abcdefghijklmnopqrst"), 1, 19, S("a"));
+    test(S("abcdefghijklmnopqrst"), 10, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 10, 1, S("abcdefghijlmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 10, 5, S("abcdefghijpqrst"));
+    test(S("abcdefghijklmnopqrst"), 10, 9, S("abcdefghijt"));
+    test(S("abcdefghijklmnopqrst"), 10, 10, S("abcdefghij"));
+    test(S("abcdefghijklmnopqrst"), 19, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 19, 1, S("abcdefghijklmnopqrs"));
+    test(S("abcdefghijklmnopqrst"), 20, 0, S("abcdefghijklmnopqrst"));
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    test(S(""), 0, 0, S(""));
+    test(S("abcde"), 0, 0, S("abcde"));
+    test(S("abcde"), 0, 1, S("bcde"));
+    test(S("abcde"), 0, 2, S("cde"));
+    test(S("abcde"), 0, 4, S("e"));
+    test(S("abcde"), 0, 5, S(""));
+    test(S("abcde"), 1, 0, S("abcde"));
+    test(S("abcde"), 1, 1, S("acde"));
+    test(S("abcde"), 1, 2, S("ade"));
+    test(S("abcde"), 1, 3, S("ae"));
+    test(S("abcde"), 1, 4, S("a"));
+    test(S("abcde"), 2, 0, S("abcde"));
+    test(S("abcde"), 2, 1, S("abde"));
+    test(S("abcde"), 2, 2, S("abe"));
+    test(S("abcde"), 2, 3, S("ab"));
+    test(S("abcde"), 4, 0, S("abcde"));
+    test(S("abcde"), 4, 1, S("abcd"));
+    test(S("abcde"), 5, 0, S("abcde"));
+    test(S("abcdefghij"), 0, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 0, 1, S("bcdefghij"));
+    test(S("abcdefghij"), 0, 5, S("fghij"));
+    test(S("abcdefghij"), 0, 9, S("j"));
+    test(S("abcdefghij"), 0, 10, S(""));
+    test(S("abcdefghij"), 1, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 1, 1, S("acdefghij"));
+    test(S("abcdefghij"), 1, 4, S("afghij"));
+    test(S("abcdefghij"), 1, 8, S("aj"));
+    test(S("abcdefghij"), 1, 9, S("a"));
+    test(S("abcdefghij"), 5, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 5, 1, S("abcdeghij"));
+    test(S("abcdefghij"), 5, 2, S("abcdehij"));
+    test(S("abcdefghij"), 5, 4, S("abcdej"));
+    test(S("abcdefghij"), 5, 5, S("abcde"));
+    test(S("abcdefghij"), 9, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 9, 1, S("abcdefghi"));
+    test(S("abcdefghij"), 10, 0, S("abcdefghij"));
+    test(S("abcdefghijklmnopqrst"), 0, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 0, 1, S("bcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 0, 10, S("klmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 0, 19, S("t"));
+    test(S("abcdefghijklmnopqrst"), 0, 20, S(""));
+    test(S("abcdefghijklmnopqrst"), 1, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 1, 1, S("acdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 1, 9, S("aklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 1, 18, S("at"));
+    test(S("abcdefghijklmnopqrst"), 1, 19, S("a"));
+    test(S("abcdefghijklmnopqrst"), 10, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 10, 1, S("abcdefghijlmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 10, 5, S("abcdefghijpqrst"));
+    test(S("abcdefghijklmnopqrst"), 10, 9, S("abcdefghijt"));
+    test(S("abcdefghijklmnopqrst"), 10, 10, S("abcdefghij"));
+    test(S("abcdefghijklmnopqrst"), 19, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 19, 1, S("abcdefghijklmnopqrs"));
+    test(S("abcdefghijklmnopqrst"), 20, 0, S("abcdefghijklmnopqrst"));
+    }
+#endif
+}

test/std/strings/basic.string/string.modifiers/string_erase/pop_back.pass.cpp

@@ -0,0 +1,55 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// void pop_back();
+
+#if _LIBCPP_DEBUG >= 1
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+#endif
+
+#include <string>
+#include <cassert>
+
+#include "min_allocator.h"
+
+template <class S>
+void
+test(S s, S expected)
+{
+    s.pop_back();
+    assert(s.__invariants());
+    assert(s == expected);
+}
+
+int main()
+{
+    {
+    typedef std::string S;
+    test(S("abcde"), S("abcd"));
+    test(S("abcdefghij"), S("abcdefghi"));
+    test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrs"));
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    test(S("abcde"), S("abcd"));
+    test(S("abcdefghij"), S("abcdefghi"));
+    test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrs"));
+    }
+#endif
+#if _LIBCPP_DEBUG >= 1
+    {
+        std::string s;
+        s.pop_back();
+        assert(false);
+    }
+#endif        
+}

test/std/strings/basic.string/string.modifiers/string_erase/size_size.pass.cpp

@@ -0,0 +1,280 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// basic_string<charT,traits,Allocator>&
+//   erase(size_type pos = 0, size_type n = npos);
+
+#include <string>
+#include <stdexcept>
+#include <cassert>
+
+#include "min_allocator.h"
+
+template <class S>
+void
+test(S s, typename S::size_type pos, typename S::size_type n, S expected)
+{
+    typename S::size_type old_size = s.size();
+    S s0 = s;
+    try
+    {
+        s.erase(pos, n);
+        assert(s.__invariants());
+        assert(pos <= old_size);
+        assert(s == expected);
+    }
+    catch (std::out_of_range&)
+    {
+        assert(pos > old_size);
+        assert(s == s0);
+    }
+}
+
+template <class S>
+void
+test(S s, typename S::size_type pos, S expected)
+{
+    typename S::size_type old_size = s.size();
+    S s0 = s;
+    try
+    {
+        s.erase(pos);
+        assert(s.__invariants());
+        assert(pos <= old_size);
+        assert(s == expected);
+    }
+    catch (std::out_of_range&)
+    {
+        assert(pos > old_size);
+        assert(s == s0);
+    }
+}
+
+template <class S>
+void
+test(S s, S expected)
+{
+    s.erase();
+    assert(s.__invariants());
+    assert(s == expected);
+}
+
+int main()
+{
+    {
+    typedef std::string S;
+    test(S(""), 0, 0, S(""));
+    test(S(""), 0, 1, S(""));
+    test(S(""), 1, 0, S("can't happen"));
+    test(S("abcde"), 0, 0, S("abcde"));
+    test(S("abcde"), 0, 1, S("bcde"));
+    test(S("abcde"), 0, 2, S("cde"));
+    test(S("abcde"), 0, 4, S("e"));
+    test(S("abcde"), 0, 5, S(""));
+    test(S("abcde"), 0, 6, S(""));
+    test(S("abcde"), 1, 0, S("abcde"));
+    test(S("abcde"), 1, 1, S("acde"));
+    test(S("abcde"), 1, 2, S("ade"));
+    test(S("abcde"), 1, 3, S("ae"));
+    test(S("abcde"), 1, 4, S("a"));
+    test(S("abcde"), 1, 5, S("a"));
+    test(S("abcde"), 2, 0, S("abcde"));
+    test(S("abcde"), 2, 1, S("abde"));
+    test(S("abcde"), 2, 2, S("abe"));
+    test(S("abcde"), 2, 3, S("ab"));
+    test(S("abcde"), 2, 4, S("ab"));
+    test(S("abcde"), 4, 0, S("abcde"));
+    test(S("abcde"), 4, 1, S("abcd"));
+    test(S("abcde"), 4, 2, S("abcd"));
+    test(S("abcde"), 5, 0, S("abcde"));
+    test(S("abcde"), 5, 1, S("abcde"));
+    test(S("abcde"), 6, 0, S("can't happen"));
+    test(S("abcdefghij"), 0, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 0, 1, S("bcdefghij"));
+    test(S("abcdefghij"), 0, 5, S("fghij"));
+    test(S("abcdefghij"), 0, 9, S("j"));
+    test(S("abcdefghij"), 0, 10, S(""));
+    test(S("abcdefghij"), 0, 11, S(""));
+    test(S("abcdefghij"), 1, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 1, 1, S("acdefghij"));
+    test(S("abcdefghij"), 1, 4, S("afghij"));
+    test(S("abcdefghij"), 1, 8, S("aj"));
+    test(S("abcdefghij"), 1, 9, S("a"));
+    test(S("abcdefghij"), 1, 10, S("a"));
+    test(S("abcdefghij"), 5, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 5, 1, S("abcdeghij"));
+    test(S("abcdefghij"), 5, 2, S("abcdehij"));
+    test(S("abcdefghij"), 5, 4, S("abcdej"));
+    test(S("abcdefghij"), 5, 5, S("abcde"));
+    test(S("abcdefghij"), 5, 6, S("abcde"));
+    test(S("abcdefghij"), 9, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 9, 1, S("abcdefghi"));
+    test(S("abcdefghij"), 9, 2, S("abcdefghi"));
+    test(S("abcdefghij"), 10, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 10, 1, S("abcdefghij"));
+    test(S("abcdefghij"), 11, 0, S("can't happen"));
+    test(S("abcdefghijklmnopqrst"), 0, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 0, 1, S("bcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 0, 10, S("klmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 0, 19, S("t"));
+    test(S("abcdefghijklmnopqrst"), 0, 20, S(""));
+    test(S("abcdefghijklmnopqrst"), 0, 21, S(""));
+    test(S("abcdefghijklmnopqrst"), 1, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 1, 1, S("acdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 1, 9, S("aklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 1, 18, S("at"));
+    test(S("abcdefghijklmnopqrst"), 1, 19, S("a"));
+    test(S("abcdefghijklmnopqrst"), 1, 20, S("a"));
+    test(S("abcdefghijklmnopqrst"), 10, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 10, 1, S("abcdefghijlmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 10, 5, S("abcdefghijpqrst"));
+    test(S("abcdefghijklmnopqrst"), 10, 9, S("abcdefghijt"));
+    test(S("abcdefghijklmnopqrst"), 10, 10, S("abcdefghij"));
+    test(S("abcdefghijklmnopqrst"), 10, 11, S("abcdefghij"));
+    test(S("abcdefghijklmnopqrst"), 19, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 19, 1, S("abcdefghijklmnopqrs"));
+    test(S("abcdefghijklmnopqrst"), 19, 2, S("abcdefghijklmnopqrs"));
+    test(S("abcdefghijklmnopqrst"), 20, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 20, 1, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 21, 0, S("can't happen"));
+
+    test(S(""), 0, S(""));
+    test(S(""), 1, S("can't happen"));
+    test(S("abcde"), 0, S(""));
+    test(S("abcde"), 1, S("a"));
+    test(S("abcde"), 2, S("ab"));
+    test(S("abcde"), 4, S("abcd"));
+    test(S("abcde"), 5, S("abcde"));
+    test(S("abcde"), 6, S("can't happen"));
+    test(S("abcdefghij"), 0, S(""));
+    test(S("abcdefghij"), 1, S("a"));
+    test(S("abcdefghij"), 5, S("abcde"));
+    test(S("abcdefghij"), 9, S("abcdefghi"));
+    test(S("abcdefghij"), 10, S("abcdefghij"));
+    test(S("abcdefghij"), 11, S("can't happen"));
+    test(S("abcdefghijklmnopqrst"), 0, S(""));
+    test(S("abcdefghijklmnopqrst"), 1, S("a"));
+    test(S("abcdefghijklmnopqrst"), 10, S("abcdefghij"));
+    test(S("abcdefghijklmnopqrst"), 19, S("abcdefghijklmnopqrs"));
+    test(S("abcdefghijklmnopqrst"), 20, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 21, S("can't happen"));
+
+    test(S(""), S(""));
+    test(S("abcde"), S(""));
+    test(S("abcdefghij"), S(""));
+    test(S("abcdefghijklmnopqrst"), S(""));
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    test(S(""), 0, 0, S(""));
+    test(S(""), 0, 1, S(""));
+    test(S(""), 1, 0, S("can't happen"));
+    test(S("abcde"), 0, 0, S("abcde"));
+    test(S("abcde"), 0, 1, S("bcde"));
+    test(S("abcde"), 0, 2, S("cde"));
+    test(S("abcde"), 0, 4, S("e"));
+    test(S("abcde"), 0, 5, S(""));
+    test(S("abcde"), 0, 6, S(""));
+    test(S("abcde"), 1, 0, S("abcde"));
+    test(S("abcde"), 1, 1, S("acde"));
+    test(S("abcde"), 1, 2, S("ade"));
+    test(S("abcde"), 1, 3, S("ae"));
+    test(S("abcde"), 1, 4, S("a"));
+    test(S("abcde"), 1, 5, S("a"));
+    test(S("abcde"), 2, 0, S("abcde"));
+    test(S("abcde"), 2, 1, S("abde"));
+    test(S("abcde"), 2, 2, S("abe"));
+    test(S("abcde"), 2, 3, S("ab"));
+    test(S("abcde"), 2, 4, S("ab"));
+    test(S("abcde"), 4, 0, S("abcde"));
+    test(S("abcde"), 4, 1, S("abcd"));
+    test(S("abcde"), 4, 2, S("abcd"));
+    test(S("abcde"), 5, 0, S("abcde"));
+    test(S("abcde"), 5, 1, S("abcde"));
+    test(S("abcde"), 6, 0, S("can't happen"));
+    test(S("abcdefghij"), 0, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 0, 1, S("bcdefghij"));
+    test(S("abcdefghij"), 0, 5, S("fghij"));
+    test(S("abcdefghij"), 0, 9, S("j"));
+    test(S("abcdefghij"), 0, 10, S(""));
+    test(S("abcdefghij"), 0, 11, S(""));
+    test(S("abcdefghij"), 1, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 1, 1, S("acdefghij"));
+    test(S("abcdefghij"), 1, 4, S("afghij"));
+    test(S("abcdefghij"), 1, 8, S("aj"));
+    test(S("abcdefghij"), 1, 9, S("a"));
+    test(S("abcdefghij"), 1, 10, S("a"));
+    test(S("abcdefghij"), 5, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 5, 1, S("abcdeghij"));
+    test(S("abcdefghij"), 5, 2, S("abcdehij"));
+    test(S("abcdefghij"), 5, 4, S("abcdej"));
+    test(S("abcdefghij"), 5, 5, S("abcde"));
+    test(S("abcdefghij"), 5, 6, S("abcde"));
+    test(S("abcdefghij"), 9, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 9, 1, S("abcdefghi"));
+    test(S("abcdefghij"), 9, 2, S("abcdefghi"));
+    test(S("abcdefghij"), 10, 0, S("abcdefghij"));
+    test(S("abcdefghij"), 10, 1, S("abcdefghij"));
+    test(S("abcdefghij"), 11, 0, S("can't happen"));
+    test(S("abcdefghijklmnopqrst"), 0, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 0, 1, S("bcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 0, 10, S("klmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 0, 19, S("t"));
+    test(S("abcdefghijklmnopqrst"), 0, 20, S(""));
+    test(S("abcdefghijklmnopqrst"), 0, 21, S(""));
+    test(S("abcdefghijklmnopqrst"), 1, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 1, 1, S("acdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 1, 9, S("aklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 1, 18, S("at"));
+    test(S("abcdefghijklmnopqrst"), 1, 19, S("a"));
+    test(S("abcdefghijklmnopqrst"), 1, 20, S("a"));
+    test(S("abcdefghijklmnopqrst"), 10, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 10, 1, S("abcdefghijlmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 10, 5, S("abcdefghijpqrst"));
+    test(S("abcdefghijklmnopqrst"), 10, 9, S("abcdefghijt"));
+    test(S("abcdefghijklmnopqrst"), 10, 10, S("abcdefghij"));
+    test(S("abcdefghijklmnopqrst"), 10, 11, S("abcdefghij"));
+    test(S("abcdefghijklmnopqrst"), 19, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 19, 1, S("abcdefghijklmnopqrs"));
+    test(S("abcdefghijklmnopqrst"), 19, 2, S("abcdefghijklmnopqrs"));
+    test(S("abcdefghijklmnopqrst"), 20, 0, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 20, 1, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 21, 0, S("can't happen"));
+
+    test(S(""), 0, S(""));
+    test(S(""), 1, S("can't happen"));
+    test(S("abcde"), 0, S(""));
+    test(S("abcde"), 1, S("a"));
+    test(S("abcde"), 2, S("ab"));
+    test(S("abcde"), 4, S("abcd"));
+    test(S("abcde"), 5, S("abcde"));
+    test(S("abcde"), 6, S("can't happen"));
+    test(S("abcdefghij"), 0, S(""));
+    test(S("abcdefghij"), 1, S("a"));
+    test(S("abcdefghij"), 5, S("abcde"));
+    test(S("abcdefghij"), 9, S("abcdefghi"));
+    test(S("abcdefghij"), 10, S("abcdefghij"));
+    test(S("abcdefghij"), 11, S("can't happen"));
+    test(S("abcdefghijklmnopqrst"), 0, S(""));
+    test(S("abcdefghijklmnopqrst"), 1, S("a"));
+    test(S("abcdefghijklmnopqrst"), 10, S("abcdefghij"));
+    test(S("abcdefghijklmnopqrst"), 19, S("abcdefghijklmnopqrs"));
+    test(S("abcdefghijklmnopqrst"), 20, S("abcdefghijklmnopqrst"));
+    test(S("abcdefghijklmnopqrst"), 21, S("can't happen"));
+
+    test(S(""), S(""));
+    test(S("abcde"), S(""));
+    test(S("abcdefghij"), S(""));
+    test(S("abcdefghijklmnopqrst"), S(""));
+    }
+#endif
+}