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579 lines
18 KiB
579 lines
18 KiB
/*
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* Copyright 2015 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "api/array_view.h"
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#include <algorithm>
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#include <array>
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#include <string>
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#include <utility>
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#include <vector>
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#include "rtc_base/buffer.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/gunit.h"
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#include "test/gmock.h"
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namespace rtc {
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namespace {
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using ::testing::ElementsAre;
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using ::testing::IsEmpty;
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template <typename T>
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size_t Call(ArrayView<T> av) {
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return av.size();
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}
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template <typename T, size_t N>
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void CallFixed(ArrayView<T, N> av) {}
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} // namespace
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TEST(ArrayViewDeathTest, TestConstructFromPtrAndArray) {
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char arr[] = "Arrr!";
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const char carr[] = "Carrr!";
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EXPECT_EQ(6u, Call<const char>(arr));
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EXPECT_EQ(7u, Call<const char>(carr));
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EXPECT_EQ(6u, Call<char>(arr));
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// Call<char>(carr); // Compile error, because can't drop const.
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// Call<int>(arr); // Compile error, because incompatible types.
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ArrayView<int*> x;
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EXPECT_EQ(0u, x.size());
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EXPECT_EQ(nullptr, x.data());
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ArrayView<char> y = arr;
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EXPECT_EQ(6u, y.size());
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EXPECT_EQ(arr, y.data());
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ArrayView<char, 6> yf = arr;
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static_assert(yf.size() == 6, "");
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EXPECT_EQ(arr, yf.data());
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ArrayView<const char> z(arr + 1, 3);
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EXPECT_EQ(3u, z.size());
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EXPECT_EQ(arr + 1, z.data());
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ArrayView<const char, 3> zf(arr + 1, 3);
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static_assert(zf.size() == 3, "");
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EXPECT_EQ(arr + 1, zf.data());
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ArrayView<const char> w(arr, 2);
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EXPECT_EQ(2u, w.size());
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EXPECT_EQ(arr, w.data());
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ArrayView<const char, 2> wf(arr, 2);
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static_assert(wf.size() == 2, "");
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EXPECT_EQ(arr, wf.data());
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ArrayView<char> q(arr, 0);
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EXPECT_EQ(0u, q.size());
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EXPECT_EQ(nullptr, q.data());
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ArrayView<char, 0> qf(arr, 0);
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static_assert(qf.size() == 0, "");
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EXPECT_EQ(nullptr, qf.data());
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#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
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// DCHECK error (nullptr with nonzero size).
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EXPECT_DEATH(ArrayView<int>(static_cast<int*>(nullptr), 5), "");
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#endif
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// These are compile errors, because incompatible types.
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// ArrayView<int> m = arr;
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// ArrayView<float> n(arr + 2, 2);
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}
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TEST(ArrayViewTest, TestCopyConstructorVariableLvalue) {
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char arr[] = "Arrr!";
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ArrayView<char> x = arr;
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EXPECT_EQ(6u, x.size());
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EXPECT_EQ(arr, x.data());
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ArrayView<char> y = x; // Copy non-const -> non-const.
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EXPECT_EQ(6u, y.size());
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EXPECT_EQ(arr, y.data());
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ArrayView<const char> z = x; // Copy non-const -> const.
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EXPECT_EQ(6u, z.size());
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EXPECT_EQ(arr, z.data());
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ArrayView<const char> w = z; // Copy const -> const.
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EXPECT_EQ(6u, w.size());
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EXPECT_EQ(arr, w.data());
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// ArrayView<char> v = z; // Compile error, because can't drop const.
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}
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TEST(ArrayViewTest, TestCopyConstructorVariableRvalue) {
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char arr[] = "Arrr!";
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ArrayView<char> x = arr;
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EXPECT_EQ(6u, x.size());
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EXPECT_EQ(arr, x.data());
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ArrayView<char> y = std::move(x); // Copy non-const -> non-const.
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EXPECT_EQ(6u, y.size());
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EXPECT_EQ(arr, y.data());
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ArrayView<const char> z = std::move(x); // Copy non-const -> const.
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EXPECT_EQ(6u, z.size());
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EXPECT_EQ(arr, z.data());
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ArrayView<const char> w = std::move(z); // Copy const -> const.
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EXPECT_EQ(6u, w.size());
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EXPECT_EQ(arr, w.data());
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// ArrayView<char> v = std::move(z); // Error, because can't drop const.
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}
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TEST(ArrayViewTest, TestCopyConstructorFixedLvalue) {
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char arr[] = "Arrr!";
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ArrayView<char, 6> x = arr;
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static_assert(x.size() == 6, "");
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EXPECT_EQ(arr, x.data());
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// Copy fixed -> fixed.
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ArrayView<char, 6> y = x; // Copy non-const -> non-const.
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static_assert(y.size() == 6, "");
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EXPECT_EQ(arr, y.data());
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ArrayView<const char, 6> z = x; // Copy non-const -> const.
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static_assert(z.size() == 6, "");
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EXPECT_EQ(arr, z.data());
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ArrayView<const char, 6> w = z; // Copy const -> const.
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static_assert(w.size() == 6, "");
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EXPECT_EQ(arr, w.data());
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// ArrayView<char, 6> v = z; // Compile error, because can't drop const.
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// Copy fixed -> variable.
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ArrayView<char> yv = x; // Copy non-const -> non-const.
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EXPECT_EQ(6u, yv.size());
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EXPECT_EQ(arr, yv.data());
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ArrayView<const char> zv = x; // Copy non-const -> const.
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EXPECT_EQ(6u, zv.size());
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EXPECT_EQ(arr, zv.data());
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ArrayView<const char> wv = z; // Copy const -> const.
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EXPECT_EQ(6u, wv.size());
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EXPECT_EQ(arr, wv.data());
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// ArrayView<char> vv = z; // Compile error, because can't drop const.
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}
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TEST(ArrayViewTest, TestCopyConstructorFixedRvalue) {
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char arr[] = "Arrr!";
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ArrayView<char, 6> x = arr;
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static_assert(x.size() == 6, "");
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EXPECT_EQ(arr, x.data());
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// Copy fixed -> fixed.
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ArrayView<char, 6> y = std::move(x); // Copy non-const -> non-const.
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static_assert(y.size() == 6, "");
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EXPECT_EQ(arr, y.data());
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ArrayView<const char, 6> z = std::move(x); // Copy non-const -> const.
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static_assert(z.size() == 6, "");
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EXPECT_EQ(arr, z.data());
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ArrayView<const char, 6> w = std::move(z); // Copy const -> const.
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static_assert(w.size() == 6, "");
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EXPECT_EQ(arr, w.data());
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// ArrayView<char, 6> v = std::move(z); // Error, because can't drop const.
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// Copy fixed -> variable.
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ArrayView<char> yv = std::move(x); // Copy non-const -> non-const.
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EXPECT_EQ(6u, yv.size());
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EXPECT_EQ(arr, yv.data());
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ArrayView<const char> zv = std::move(x); // Copy non-const -> const.
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EXPECT_EQ(6u, zv.size());
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EXPECT_EQ(arr, zv.data());
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ArrayView<const char> wv = std::move(z); // Copy const -> const.
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EXPECT_EQ(6u, wv.size());
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EXPECT_EQ(arr, wv.data());
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// ArrayView<char> vv = std::move(z); // Error, because can't drop const.
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}
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TEST(ArrayViewTest, TestCopyAssignmentVariableLvalue) {
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char arr[] = "Arrr!";
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ArrayView<char> x(arr);
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EXPECT_EQ(6u, x.size());
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EXPECT_EQ(arr, x.data());
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ArrayView<char> y;
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y = x; // Copy non-const -> non-const.
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EXPECT_EQ(6u, y.size());
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EXPECT_EQ(arr, y.data());
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ArrayView<const char> z;
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z = x; // Copy non-const -> const.
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EXPECT_EQ(6u, z.size());
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EXPECT_EQ(arr, z.data());
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ArrayView<const char> w;
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w = z; // Copy const -> const.
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EXPECT_EQ(6u, w.size());
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EXPECT_EQ(arr, w.data());
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// ArrayView<char> v;
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// v = z; // Compile error, because can't drop const.
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}
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TEST(ArrayViewTest, TestCopyAssignmentVariableRvalue) {
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char arr[] = "Arrr!";
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ArrayView<char> x(arr);
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EXPECT_EQ(6u, x.size());
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EXPECT_EQ(arr, x.data());
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ArrayView<char> y;
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y = std::move(x); // Copy non-const -> non-const.
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EXPECT_EQ(6u, y.size());
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EXPECT_EQ(arr, y.data());
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ArrayView<const char> z;
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z = std::move(x); // Copy non-const -> const.
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EXPECT_EQ(6u, z.size());
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EXPECT_EQ(arr, z.data());
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ArrayView<const char> w;
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w = std::move(z); // Copy const -> const.
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EXPECT_EQ(6u, w.size());
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EXPECT_EQ(arr, w.data());
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// ArrayView<char> v;
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// v = std::move(z); // Compile error, because can't drop const.
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}
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TEST(ArrayViewTest, TestCopyAssignmentFixedLvalue) {
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char arr[] = "Arrr!";
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char init[] = "Init!";
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ArrayView<char, 6> x(arr);
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EXPECT_EQ(arr, x.data());
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// Copy fixed -> fixed.
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ArrayView<char, 6> y(init);
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y = x; // Copy non-const -> non-const.
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EXPECT_EQ(arr, y.data());
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ArrayView<const char, 6> z(init);
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z = x; // Copy non-const -> const.
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EXPECT_EQ(arr, z.data());
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ArrayView<const char, 6> w(init);
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w = z; // Copy const -> const.
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EXPECT_EQ(arr, w.data());
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// ArrayView<char, 6> v(init);
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// v = z; // Compile error, because can't drop const.
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// Copy fixed -> variable.
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ArrayView<char> yv;
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yv = x; // Copy non-const -> non-const.
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EXPECT_EQ(6u, yv.size());
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EXPECT_EQ(arr, yv.data());
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ArrayView<const char> zv;
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zv = x; // Copy non-const -> const.
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EXPECT_EQ(6u, zv.size());
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EXPECT_EQ(arr, zv.data());
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ArrayView<const char> wv;
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wv = z; // Copy const -> const.
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EXPECT_EQ(6u, wv.size());
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EXPECT_EQ(arr, wv.data());
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// ArrayView<char> v;
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// v = z; // Compile error, because can't drop const.
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}
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TEST(ArrayViewTest, TestCopyAssignmentFixedRvalue) {
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char arr[] = "Arrr!";
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char init[] = "Init!";
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ArrayView<char, 6> x(arr);
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EXPECT_EQ(arr, x.data());
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// Copy fixed -> fixed.
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ArrayView<char, 6> y(init);
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y = std::move(x); // Copy non-const -> non-const.
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EXPECT_EQ(arr, y.data());
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ArrayView<const char, 6> z(init);
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z = std::move(x); // Copy non-const -> const.
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EXPECT_EQ(arr, z.data());
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ArrayView<const char, 6> w(init);
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w = std::move(z); // Copy const -> const.
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EXPECT_EQ(arr, w.data());
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// ArrayView<char, 6> v(init);
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// v = std::move(z); // Compile error, because can't drop const.
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// Copy fixed -> variable.
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ArrayView<char> yv;
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yv = std::move(x); // Copy non-const -> non-const.
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EXPECT_EQ(6u, yv.size());
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EXPECT_EQ(arr, yv.data());
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ArrayView<const char> zv;
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zv = std::move(x); // Copy non-const -> const.
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EXPECT_EQ(6u, zv.size());
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EXPECT_EQ(arr, zv.data());
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ArrayView<const char> wv;
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wv = std::move(z); // Copy const -> const.
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EXPECT_EQ(6u, wv.size());
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EXPECT_EQ(arr, wv.data());
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// ArrayView<char> v;
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// v = std::move(z); // Compile error, because can't drop const.
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}
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TEST(ArrayViewTest, TestStdArray) {
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EXPECT_EQ(4u, Call<const int>(std::array<int, 4>{1, 2, 3, 4}));
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CallFixed<const int, 3>(std::array<int, 3>{2, 3, 4});
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constexpr size_t size = 5;
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std::array<float, size> arr{};
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// Fixed size view.
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rtc::ArrayView<float, size> arr_view_fixed(arr);
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EXPECT_EQ(arr.data(), arr_view_fixed.data());
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static_assert(size == arr_view_fixed.size(), "");
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// Variable size view.
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rtc::ArrayView<float> arr_view(arr);
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EXPECT_EQ(arr.data(), arr_view.data());
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EXPECT_EQ(size, arr_view.size());
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}
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TEST(ArrayViewTest, TestConstStdArray) {
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constexpr size_t size = 5;
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constexpr std::array<float, size> constexpr_arr{};
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rtc::ArrayView<const float, size> constexpr_arr_view(constexpr_arr);
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EXPECT_EQ(constexpr_arr.data(), constexpr_arr_view.data());
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static_assert(constexpr_arr.size() == constexpr_arr_view.size(), "");
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const std::array<float, size> const_arr{};
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rtc::ArrayView<const float, size> const_arr_view(const_arr);
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EXPECT_EQ(const_arr.data(), const_arr_view.data());
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static_assert(const_arr.size() == const_arr_view.size(), "");
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std::array<float, size> non_const_arr{};
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rtc::ArrayView<const float, size> non_const_arr_view(non_const_arr);
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EXPECT_EQ(non_const_arr.data(), non_const_arr_view.data());
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static_assert(non_const_arr.size() == non_const_arr_view.size(), "");
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}
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TEST(ArrayViewTest, TestStdVector) {
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EXPECT_EQ(3u, Call<const int>(std::vector<int>{4, 5, 6}));
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std::vector<int> v;
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v.push_back(3);
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v.push_back(11);
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EXPECT_EQ(2u, Call<const int>(v));
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EXPECT_EQ(2u, Call<int>(v));
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// Call<unsigned int>(v); // Compile error, because incompatible types.
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ArrayView<int> x = v;
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EXPECT_EQ(2u, x.size());
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EXPECT_EQ(v.data(), x.data());
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ArrayView<const int> y;
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y = v;
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EXPECT_EQ(2u, y.size());
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EXPECT_EQ(v.data(), y.data());
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// ArrayView<double> d = v; // Compile error, because incompatible types.
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const std::vector<int> cv;
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EXPECT_EQ(0u, Call<const int>(cv));
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// Call<int>(cv); // Compile error, because can't drop const.
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ArrayView<const int> z = cv;
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EXPECT_EQ(0u, z.size());
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EXPECT_EQ(nullptr, z.data());
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// ArrayView<int> w = cv; // Compile error, because can't drop const.
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}
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TEST(ArrayViewTest, TestRtcBuffer) {
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rtc::Buffer b = "so buffer";
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EXPECT_EQ(10u, Call<const uint8_t>(b));
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EXPECT_EQ(10u, Call<uint8_t>(b));
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// Call<int8_t>(b); // Compile error, because incompatible types.
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ArrayView<uint8_t> x = b;
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EXPECT_EQ(10u, x.size());
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EXPECT_EQ(b.data(), x.data());
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ArrayView<const uint8_t> y;
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y = b;
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EXPECT_EQ(10u, y.size());
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EXPECT_EQ(b.data(), y.data());
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// ArrayView<char> d = b; // Compile error, because incompatible types.
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const rtc::Buffer cb = "very const";
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EXPECT_EQ(11u, Call<const uint8_t>(cb));
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// Call<uint8_t>(cb); // Compile error, because can't drop const.
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ArrayView<const uint8_t> z = cb;
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EXPECT_EQ(11u, z.size());
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EXPECT_EQ(cb.data(), z.data());
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// ArrayView<uint8_t> w = cb; // Compile error, because can't drop const.
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}
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TEST(ArrayViewTest, TestSwapVariable) {
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const char arr[] = "Arrr!";
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const char aye[] = "Aye, Cap'n!";
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ArrayView<const char> x(arr);
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EXPECT_EQ(6u, x.size());
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EXPECT_EQ(arr, x.data());
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ArrayView<const char> y(aye);
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EXPECT_EQ(12u, y.size());
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EXPECT_EQ(aye, y.data());
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using std::swap;
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swap(x, y);
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EXPECT_EQ(12u, x.size());
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EXPECT_EQ(aye, x.data());
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EXPECT_EQ(6u, y.size());
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EXPECT_EQ(arr, y.data());
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// ArrayView<char> z;
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// swap(x, z); // Compile error, because can't drop const.
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}
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TEST(FixArrayViewTest, TestSwapFixed) {
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const char arr[] = "Arr!";
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char aye[] = "Aye!";
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ArrayView<const char, 5> x(arr);
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EXPECT_EQ(arr, x.data());
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ArrayView<const char, 5> y(aye);
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EXPECT_EQ(aye, y.data());
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using std::swap;
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swap(x, y);
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EXPECT_EQ(aye, x.data());
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EXPECT_EQ(arr, y.data());
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// ArrayView<char, 5> z(aye);
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// swap(x, z); // Compile error, because can't drop const.
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// ArrayView<const char, 4> w(aye, 4);
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// swap(x, w); // Compile error, because different sizes.
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}
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TEST(ArrayViewDeathTest, TestIndexing) {
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char arr[] = "abcdefg";
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ArrayView<char> x(arr);
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const ArrayView<char> y(arr);
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ArrayView<const char, 8> z(arr);
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EXPECT_EQ(8u, x.size());
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EXPECT_EQ(8u, y.size());
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EXPECT_EQ(8u, z.size());
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EXPECT_EQ('b', x[1]);
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EXPECT_EQ('c', y[2]);
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EXPECT_EQ('d', z[3]);
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x[3] = 'X';
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y[2] = 'Y';
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// z[1] = 'Z'; // Compile error, because z's element type is const char.
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EXPECT_EQ('b', x[1]);
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EXPECT_EQ('Y', y[2]);
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EXPECT_EQ('X', z[3]);
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#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
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EXPECT_DEATH(z[8], ""); // DCHECK error (index out of bounds).
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#endif
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}
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TEST(ArrayViewTest, TestIterationEmpty) {
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// Variable-size.
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ArrayView<std::vector<std::vector<std::vector<std::string>>>> av;
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EXPECT_EQ(av.begin(), av.end());
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EXPECT_EQ(av.cbegin(), av.cend());
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for (auto& e : av) {
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EXPECT_TRUE(false);
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EXPECT_EQ(42u, e.size()); // Dummy use of e to prevent unused var warning.
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}
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|
|
// Fixed-size.
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ArrayView<std::vector<std::vector<std::vector<std::string>>>, 0> af;
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EXPECT_EQ(af.begin(), af.end());
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EXPECT_EQ(af.cbegin(), af.cend());
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for (auto& e : af) {
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EXPECT_TRUE(false);
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EXPECT_EQ(42u, e.size()); // Dummy use of e to prevent unused var warning.
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}
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}
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TEST(ArrayViewTest, TestIterationVariable) {
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char arr[] = "Arrr!";
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ArrayView<char> av(arr);
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EXPECT_EQ('A', *av.begin());
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EXPECT_EQ('A', *av.cbegin());
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EXPECT_EQ('\0', *(av.end() - 1));
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EXPECT_EQ('\0', *(av.cend() - 1));
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char i = 0;
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for (auto& e : av) {
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EXPECT_EQ(arr + i, &e);
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e = 's' + i;
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++i;
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}
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i = 0;
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for (auto& e : ArrayView<const char>(av)) {
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EXPECT_EQ(arr + i, &e);
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// e = 'q' + i; // Compile error, because e is a const char&.
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++i;
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|
}
|
|
}
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|
|
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TEST(ArrayViewTest, TestIterationFixed) {
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|
char arr[] = "Arrr!";
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|
ArrayView<char, 6> av(arr);
|
|
EXPECT_EQ('A', *av.begin());
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|
EXPECT_EQ('A', *av.cbegin());
|
|
EXPECT_EQ('\0', *(av.end() - 1));
|
|
EXPECT_EQ('\0', *(av.cend() - 1));
|
|
char i = 0;
|
|
for (auto& e : av) {
|
|
EXPECT_EQ(arr + i, &e);
|
|
e = 's' + i;
|
|
++i;
|
|
}
|
|
i = 0;
|
|
for (auto& e : ArrayView<const char, 6>(av)) {
|
|
EXPECT_EQ(arr + i, &e);
|
|
// e = 'q' + i; // Compile error, because e is a const char&.
|
|
++i;
|
|
}
|
|
}
|
|
|
|
TEST(ArrayViewTest, TestEmpty) {
|
|
EXPECT_TRUE(ArrayView<int>().empty());
|
|
const int a[] = {1, 2, 3};
|
|
EXPECT_FALSE(ArrayView<const int>(a).empty());
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|
|
|
static_assert(ArrayView<int, 0>::empty(), "");
|
|
static_assert(!ArrayView<int, 3>::empty(), "");
|
|
}
|
|
|
|
TEST(ArrayViewTest, TestCompare) {
|
|
int a[] = {1, 2, 3};
|
|
int b[] = {1, 2, 3};
|
|
|
|
EXPECT_EQ(ArrayView<int>(a), ArrayView<int>(a));
|
|
EXPECT_EQ((ArrayView<int, 3>(a)), (ArrayView<int, 3>(a)));
|
|
EXPECT_EQ(ArrayView<int>(a), (ArrayView<int, 3>(a)));
|
|
EXPECT_EQ(ArrayView<int>(), ArrayView<int>());
|
|
EXPECT_EQ(ArrayView<int>(), ArrayView<int>(a, 0));
|
|
EXPECT_EQ(ArrayView<int>(a, 0), ArrayView<int>(b, 0));
|
|
EXPECT_EQ((ArrayView<int, 0>(a, 0)), ArrayView<int>());
|
|
|
|
EXPECT_NE(ArrayView<int>(a), ArrayView<int>(b));
|
|
EXPECT_NE((ArrayView<int, 3>(a)), (ArrayView<int, 3>(b)));
|
|
EXPECT_NE((ArrayView<int, 3>(a)), ArrayView<int>(b));
|
|
EXPECT_NE(ArrayView<int>(a), ArrayView<int>());
|
|
EXPECT_NE(ArrayView<int>(a), ArrayView<int>(a, 2));
|
|
EXPECT_NE((ArrayView<int, 3>(a)), (ArrayView<int, 2>(a, 2)));
|
|
}
|
|
|
|
TEST(ArrayViewTest, TestSubViewVariable) {
|
|
int a[] = {1, 2, 3};
|
|
ArrayView<int> av(a);
|
|
|
|
EXPECT_EQ(av.subview(0), av);
|
|
|
|
EXPECT_THAT(av.subview(1), ElementsAre(2, 3));
|
|
EXPECT_THAT(av.subview(2), ElementsAre(3));
|
|
EXPECT_THAT(av.subview(3), IsEmpty());
|
|
EXPECT_THAT(av.subview(4), IsEmpty());
|
|
|
|
EXPECT_THAT(av.subview(1, 0), IsEmpty());
|
|
EXPECT_THAT(av.subview(1, 1), ElementsAre(2));
|
|
EXPECT_THAT(av.subview(1, 2), ElementsAre(2, 3));
|
|
EXPECT_THAT(av.subview(1, 3), ElementsAre(2, 3));
|
|
}
|
|
|
|
TEST(ArrayViewTest, TestSubViewFixed) {
|
|
int a[] = {1, 2, 3};
|
|
ArrayView<int, 3> av(a);
|
|
|
|
EXPECT_EQ(av.subview(0), av);
|
|
|
|
EXPECT_THAT(av.subview(1), ElementsAre(2, 3));
|
|
EXPECT_THAT(av.subview(2), ElementsAre(3));
|
|
EXPECT_THAT(av.subview(3), IsEmpty());
|
|
EXPECT_THAT(av.subview(4), IsEmpty());
|
|
|
|
EXPECT_THAT(av.subview(1, 0), IsEmpty());
|
|
EXPECT_THAT(av.subview(1, 1), ElementsAre(2));
|
|
EXPECT_THAT(av.subview(1, 2), ElementsAre(2, 3));
|
|
EXPECT_THAT(av.subview(1, 3), ElementsAre(2, 3));
|
|
}
|
|
|
|
TEST(ArrayViewTest, TestReinterpretCastFixedSize) {
|
|
uint8_t bytes[] = {1, 2, 3};
|
|
ArrayView<uint8_t, 3> uint8_av(bytes);
|
|
ArrayView<int8_t, 3> int8_av = reinterpret_array_view<int8_t>(uint8_av);
|
|
EXPECT_EQ(int8_av.size(), uint8_av.size());
|
|
EXPECT_EQ(int8_av[0], 1);
|
|
EXPECT_EQ(int8_av[1], 2);
|
|
EXPECT_EQ(int8_av[2], 3);
|
|
}
|
|
|
|
TEST(ArrayViewTest, TestReinterpretCastVariableSize) {
|
|
std::vector<int8_t> v = {1, 2, 3};
|
|
ArrayView<int8_t> int8_av(v);
|
|
ArrayView<uint8_t> uint8_av = reinterpret_array_view<uint8_t>(int8_av);
|
|
EXPECT_EQ(int8_av.size(), uint8_av.size());
|
|
EXPECT_EQ(uint8_av[0], 1);
|
|
EXPECT_EQ(uint8_av[1], 2);
|
|
EXPECT_EQ(uint8_av[2], 3);
|
|
}
|
|
} // namespace rtc
|