pw_polyfill: Move std::to_array to pw::containers::to_array
Avoid polyfilling C++20 library features.
Change-Id: Ibd006177cfa00972509e14037d2ece4329997dab
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/64021
Commit-Queue: Wyatt Hepler <hepler@google.com>
Reviewed-by: Keir Mierle <keir@google.com>
diff --git a/pw_containers/to_array_test.cc b/pw_containers/to_array_test.cc
new file mode 100644
index 0000000..783b078
--- /dev/null
+++ b/pw_containers/to_array_test.cc
@@ -0,0 +1,59 @@
+// Copyright 2021 The Pigweed Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License. You may obtain a copy of
+// the License at
+//
+// https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations under
+// the License.
+
+#include "pw_containers/to_array.h"
+
+#include "gtest/gtest.h"
+
+namespace pw::containers {
+namespace {
+
+TEST(Array, ToArray_StringLiteral) {
+ std::array<char, sizeof("literally!")> array = to_array("literally!");
+ EXPECT_EQ(std::strcmp(array.data(), "literally!"), 0);
+}
+
+TEST(Array, ToArray_Inline) {
+ constexpr std::array<int, 3> kArray = to_array({1, 2, 3});
+ static_assert(kArray.size() == 3);
+ EXPECT_EQ(kArray[0], 1);
+}
+
+TEST(Array, ToArray_Array) {
+ char c_array[] = "array!";
+ std::array<char, sizeof("array!")> array = to_array(c_array);
+ EXPECT_EQ(std::strcmp(array.data(), "array!"), 0);
+}
+
+struct MoveOnly {
+ MoveOnly(char ch) : value(ch) {}
+
+ MoveOnly(const MoveOnly&) = delete;
+ MoveOnly& operator=(const MoveOnly&) = delete;
+
+ MoveOnly(MoveOnly&&) = default;
+ MoveOnly& operator=(MoveOnly&&) = default;
+
+ char value;
+};
+
+TEST(Array, ToArray_MoveOnly) {
+ MoveOnly c_array[]{MoveOnly('a'), MoveOnly('b')};
+ std::array<MoveOnly, 2> array = to_array(std::move(c_array));
+ EXPECT_EQ(array[0].value, 'a');
+ EXPECT_EQ(array[1].value, 'b');
+}
+
+} // namespace
+} // namespace pw::containers