Initial commit

module/jni/libcxx/test/std/strings/basic.string/string.access/at.pass.cpp

@@ -0,0 +1,88 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// const_reference at(size_type pos) const; // constexpr since C++20
+//       reference at(size_type pos); // constexpr since C++20
+
+#include <string>
+#include <stdexcept>
+#include <cassert>
+
+#include "min_allocator.h"
+
+#include "test_macros.h"
+
+template <class S>
+TEST_CONSTEXPR_CXX20 void
+test(S s, typename S::size_type pos)
+{
+    const S& cs = s;
+    if (pos < s.size())
+    {
+        assert(s.at(pos) == s[pos]);
+        assert(cs.at(pos) == cs[pos]);
+    }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+    else if (!TEST_IS_CONSTANT_EVALUATED)
+    {
+        try
+        {
+            TEST_IGNORE_NODISCARD s.at(pos);
+            assert(false);
+        }
+        catch (std::out_of_range&)
+        {
+            assert(pos >= s.size());
+        }
+        try
+        {
+            TEST_IGNORE_NODISCARD cs.at(pos);
+            assert(false);
+        }
+        catch (std::out_of_range&)
+        {
+            assert(pos >= s.size());
+        }
+    }
+#endif
+}
+
+TEST_CONSTEXPR_CXX20 bool test() {
+  {
+    typedef std::string S;
+    test(S(), 0);
+    test(S("123"), 0);
+    test(S("123"), 1);
+    test(S("123"), 2);
+    test(S("123"), 3);
+  }
+#if TEST_STD_VER >= 11
+  {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    test(S(), 0);
+    test(S("123"), 0);
+    test(S("123"), 1);
+    test(S("123"), 2);
+    test(S("123"), 3);
+  }
+#endif
+
+    return true;
+}
+
+int main(int, char**)
+{
+  test();
+#if TEST_STD_VER > 17
+  static_assert(test());
+#endif
+
+  return 0;
+}