[libc++] Split libc++-specific tests for the frozen headers

Author: philnik777

libcxx/test/libcxx-03/Wnon_modular_include_in_module.compile.pass.cpp

@@ -0,0 +1,21 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// REQUIRES: target={{.*}}-apple-{{.*}}
+// UNSUPPORTED: c++03
+
+// This test ensures that libc++ supports being compiled with modules enabled and with
+// -Wnon-modular-include-in-module. This effectively checks that we don't include any
+// non-modular header from the library.
+//
+// Since most underlying platforms are not modularized properly, this test currently only
+// works on Apple platforms.
+
+// ADDITIONAL_COMPILE_FLAGS: -Wnon-modular-include-in-module -Wsystem-headers-in-module=std -fmodules -fcxx-modules
+
+#include <vector>

libcxx/test/libcxx-03/algorithms/alg.modifying.operations/alg.random.shuffle/random_shuffle.cxx1z.pass.cpp

@@ -0,0 +1,51 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// <algorithm>
+
+// template <class RandomAccessIterator>
+//     void
+//     random_shuffle(RandomAccessIterator first, RandomAccessIterator last);
+//
+// template <class RandomAccessIterator, class RandomNumberGenerator>
+//     void
+//     random_shuffle(RandomAccessIterator first, RandomAccessIterator last,
+//                    RandomNumberGenerator& rand);
+
+//
+//  In C++17, random_shuffle has been removed.
+//  However, for backwards compatibility, if _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE
+//  is defined before including <algorithm>, then random_shuffle will be restored.
+
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+
+#include <algorithm>
+#include <cstddef>
+#include <vector>
+
+#include "test_macros.h"
+
+struct gen
+{
+    std::ptrdiff_t operator()(std::ptrdiff_t n)
+    {
+        return n-1;
+    }
+};
+
+
+int main(int, char**)
+{
+    std::vector<int> v;
+    std::random_shuffle(v.begin(), v.end());
+    gen r;
+    std::random_shuffle(v.begin(), v.end(), r);
+
+  return 0;
+}

libcxx/test/libcxx-03/algorithms/alg.modifying.operations/alg.random.shuffle/random_shuffle.depr_in_cxx14.verify.cpp

@@ -0,0 +1,43 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// <algorithm>
+
+// template <class RandomAccessIterator>
+//     void
+//     random_shuffle(RandomAccessIterator first, RandomAccessIterator last);
+//
+// template <class RandomAccessIterator, class RandomNumberGenerator>
+//     void
+//     random_shuffle(RandomAccessIterator first, RandomAccessIterator last,
+//                    RandomNumberGenerator& rand);
+
+// UNSUPPORTED: c++03, c++11
+
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE
+
+#include <algorithm>
+#include <cstddef>
+
+#include "test_macros.h"
+
+struct gen
+{
+    std::ptrdiff_t operator()(std::ptrdiff_t n)
+    {
+        return n-1;
+    }
+};
+
+
+void f() {
+    int v[1] = {1};
+    std::random_shuffle(&v[0], &v[1]); // expected-warning {{'random_shuffle<int *>' is deprecated}}
+    gen r;
+    std::random_shuffle(&v[0], &v[1], r); // expected-warning {{'random_shuffle<int *, gen &>' is deprecated}}
+}