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module/jni/libcxx/test/std/containers/sequences/array/array.creation/to_array.fail.cpp

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+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// <array>
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+#include <array>
+
+#include "test_macros.h"
+#include "MoveOnly.h"
+
+// expected-warning@array:* 0-1 {{suggest braces around initialization of subobject}}
+
+int main(int, char**) {
+  {
+    char source[3][6] = {"hi", "world"};
+    // expected-error@array:* {{to_array does not accept multidimensional arrays}}
+    // expected-error@array:* {{to_array requires copy constructible elements}}
+    // expected-error@array:* 3 {{cannot initialize}}
+    std::to_array(source); // expected-note {{requested here}}
+  }
+
+  {
+    MoveOnly mo[] = {MoveOnly{3}};
+    // expected-error@array:* {{to_array requires copy constructible elements}}
+    // expected-error-re@array:* {{{{(call to implicitly-deleted copy constructor of 'MoveOnly')|(call to deleted constructor of 'MoveOnly')}}}}
+    std::to_array(mo); // expected-note {{requested here}}
+  }
+
+  {
+    const MoveOnly cmo[] = {MoveOnly{3}};
+    // expected-error@array:* {{to_array requires move constructible elements}}
+    // expected-error-re@array:* {{{{(call to implicitly-deleted copy constructor of 'MoveOnly')|(call to deleted constructor of 'MoveOnly')}}}}
+    std::to_array(std::move(cmo)); // expected-note {{requested here}}
+  }
+
+  return 0;
+}

module/jni/libcxx/test/std/containers/sequences/array/array.creation/to_array.pass.cpp

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+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// <array>
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+// template <typename T, size_t Size>
+// constexpr auto to_array(T (&arr)[Size])
+//    -> array<remove_cv_t<T>, Size>;
+
+// template <typename T, size_t Size>
+// constexpr auto to_array(T (&&arr)[Size])
+//    -> array<remove_cv_t<T>, Size>;
+
+#include <array>
+#include <cassert>
+
+#include "test_macros.h"
+#include "MoveOnly.h"
+
+constexpr bool tests()
+{
+  //  Test deduced type.
+  {
+    auto arr = std::to_array({1, 2, 3});
+    ASSERT_SAME_TYPE(decltype(arr), std::array<int, 3>);
+    assert(arr[0] == 1);
+    assert(arr[1] == 2);
+    assert(arr[2] == 3);
+  }
+
+  {
+    const long l1 = 42;
+    auto arr = std::to_array({1L, 4L, 9L, l1});
+    ASSERT_SAME_TYPE(decltype(arr)::value_type, long);
+    static_assert(arr.size() == 4, "");
+    assert(arr[0] == 1);
+    assert(arr[1] == 4);
+    assert(arr[2] == 9);
+    assert(arr[3] == l1);
+  }
+
+  {
+    auto arr = std::to_array("meow");
+    ASSERT_SAME_TYPE(decltype(arr), std::array<char, 5>);
+    assert(arr[0] == 'm');
+    assert(arr[1] == 'e');
+    assert(arr[2] == 'o');
+    assert(arr[3] == 'w');
+    assert(arr[4] == '\0');
+  }
+
+  {
+    double source[3] = {4.0, 5.0, 6.0};
+    auto arr = std::to_array(source);
+    ASSERT_SAME_TYPE(decltype(arr), std::array<double, 3>);
+    assert(arr[0] == 4.0);
+    assert(arr[1] == 5.0);
+    assert(arr[2] == 6.0);
+  }
+
+  {
+    double source[3] = {4.0, 5.0, 6.0};
+    auto arr = std::to_array(std::move(source));
+    ASSERT_SAME_TYPE(decltype(arr), std::array<double, 3>);
+    assert(arr[0] == 4.0);
+    assert(arr[1] == 5.0);
+    assert(arr[2] == 6.0);
+  }
+
+  {
+    MoveOnly source[] = {MoveOnly{0}, MoveOnly{1}, MoveOnly{2}};
+
+    auto arr = std::to_array(std::move(source));
+    ASSERT_SAME_TYPE(decltype(arr), std::array<MoveOnly, 3>);
+    for (int i = 0; i < 3; ++i)
+      assert(arr[i].get() == i && source[i].get() == 0);
+  }
+
+#ifndef _MSVC_STL_VERSION
+  // Test C99 compound literal.
+  {
+    auto arr = std::to_array((int[]){3, 4});
+    ASSERT_SAME_TYPE(decltype(arr), std::array<int, 2>);
+    assert(arr[0] == 3);
+    assert(arr[1] == 4);
+  }
+#endif // ! _MSVC_STL_VERSION
+
+  //  Test explicit type.
+  {
+    auto arr = std::to_array<long>({1, 2, 3});
+    ASSERT_SAME_TYPE(decltype(arr), std::array<long, 3>);
+    assert(arr[0] == 1);
+    assert(arr[1] == 2);
+    assert(arr[2] == 3);
+  }
+
+  {
+    struct A {
+      int a;
+      double b;
+    };
+
+    auto arr = std::to_array<A>({{3, .1}});
+    ASSERT_SAME_TYPE(decltype(arr), std::array<A, 1>);
+    assert(arr[0].a == 3);
+    assert(arr[0].b == .1);
+  }
+
+  return true;
+}
+
+int main(int, char**)
+{
+  tests();
+  static_assert(tests(), "");
+  return 0;
+}