summaryrefslogtreecommitdiffstats
path: root/mfbt/tests/gtest
diff options
context:
space:
mode:
Diffstat (limited to 'mfbt/tests/gtest')
-rw-r--r--mfbt/tests/gtest/TestSpan.cpp2079
-rw-r--r--mfbt/tests/gtest/moz.build15
2 files changed, 2094 insertions, 0 deletions
diff --git a/mfbt/tests/gtest/TestSpan.cpp b/mfbt/tests/gtest/TestSpan.cpp
new file mode 100644
index 000000000..f3aa000a4
--- /dev/null
+++ b/mfbt/tests/gtest/TestSpan.cpp
@@ -0,0 +1,2079 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
+//
+// This code is licensed under the MIT License (MIT).
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+// Adapted from https://github.com/Microsoft/GSL/blob/3819df6e378ffccf0e29465afe99c3b324c2aa70/tests/Span_tests.cpp
+
+#include "gtest/gtest.h"
+
+#include "mozilla/Span.h"
+
+#include "nsString.h"
+#include "nsTArray.h"
+#include "mozilla/Range.h"
+#include "mozilla/TypeTraits.h"
+
+#define SPAN_TEST(name) TEST(SpanTest, name)
+#define CHECK_THROW(a, b)
+
+using namespace std;
+using namespace mozilla;
+
+static_assert(IsConvertible<Range<int>, Span<const int>>::value,
+ "Range should convert into const");
+static_assert(IsConvertible<Range<const int>, Span<const int>>::value,
+ "const Range should convert into const");
+static_assert(!IsConvertible<Range<const int>, Span<int>>::value,
+ "Range should not drop const in conversion");
+static_assert(IsConvertible<Span<int>, Range<const int>>::value,
+ "Span should convert into const");
+static_assert(IsConvertible<Span<const int>, Range<const int>>::value,
+ "const Span should convert into const");
+static_assert(!IsConvertible<Span<const int>, Range<int>>::value,
+ "Span should not drop const in conversion");
+static_assert(IsConvertible<Span<const int>, Span<const int>>::value,
+ "const Span should convert into const");
+static_assert(IsConvertible<Span<int>, Span<const int>>::value,
+ "Span should convert into const");
+static_assert(!IsConvertible<Span<const int>, Span<int>>::value,
+ "Span should not drop const in conversion");
+static_assert(IsConvertible<const nsTArray<int>, Span<const int>>::value,
+ "const nsTArray should convert into const");
+static_assert(IsConvertible<nsTArray<int>, Span<const int>>::value,
+ "nsTArray should convert into const");
+static_assert(!IsConvertible<const nsTArray<int>, Span<int>>::value,
+ "nsTArray should not drop const in conversion");
+static_assert(IsConvertible<nsTArray<const int>, Span<const int>>::value,
+ "nsTArray should convert into const");
+static_assert(!IsConvertible<nsTArray<const int>, Span<int>>::value,
+ "nsTArray should not drop const in conversion");
+
+namespace {
+struct BaseClass
+{
+};
+struct DerivedClass : BaseClass
+{
+};
+}
+
+void
+AssertSpanOfThreeInts(Span<const int> s)
+{
+ ASSERT_EQ(s.size(), 3U);
+ ASSERT_EQ(s[0], 1);
+ ASSERT_EQ(s[1], 2);
+ ASSERT_EQ(s[2], 3);
+}
+
+void
+AssertSpanOfThreeChars(Span<const char> s)
+{
+ ASSERT_EQ(s.size(), 3U);
+ ASSERT_EQ(s[0], 'a');
+ ASSERT_EQ(s[1], 'b');
+ ASSERT_EQ(s[2], 'c');
+}
+
+void
+AssertSpanOfThreeChar16s(Span<const char16_t> s)
+{
+ ASSERT_EQ(s.size(), 3U);
+ ASSERT_EQ(s[0], 'a');
+ ASSERT_EQ(s[1], 'b');
+ ASSERT_EQ(s[2], 'c');
+}
+
+void
+AssertSpanOfThreeCharsViaString(const nsACString& aStr)
+{
+ AssertSpanOfThreeChars(aStr);
+}
+
+void
+AssertSpanOfThreeChar16sViaString(const nsAString& aStr)
+{
+ AssertSpanOfThreeChar16s(aStr);
+}
+
+SPAN_TEST(default_constructor)
+{
+ {
+ Span<int> s;
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), nullptr);
+
+ Span<const int> cs;
+ ASSERT_EQ(cs.Length(), 0U);
+ ASSERT_EQ(cs.data(), nullptr);
+ }
+
+ {
+ Span<int, 0> s;
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), nullptr);
+
+ Span<const int, 0> cs;
+ ASSERT_EQ(cs.Length(), 0U);
+ ASSERT_EQ(cs.data(), nullptr);
+ }
+
+ {
+#ifdef CONFIRM_COMPILATION_ERRORS
+ Span<int, 1> s;
+ ASSERT_EQ(s.Length(), 1U);
+ ASSERT_EQ(s.data(), nullptr); // explains why it can't compile
+#endif
+ }
+
+ {
+ Span<int> s{};
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), nullptr);
+
+ Span<const int> cs{};
+ ASSERT_EQ(cs.Length(), 0U);
+ ASSERT_EQ(cs.data(), nullptr);
+ }
+}
+
+SPAN_TEST(size_optimization)
+{
+ {
+ Span<int> s;
+ ASSERT_EQ(sizeof(s), sizeof(int*) + sizeof(size_t));
+ }
+
+ {
+ Span<int, 0> s;
+ ASSERT_EQ(sizeof(s), sizeof(int*));
+ }
+}
+
+SPAN_TEST(from_nullptr_constructor)
+{
+ {
+ Span<int> s = nullptr;
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), nullptr);
+
+ Span<const int> cs = nullptr;
+ ASSERT_EQ(cs.Length(), 0U);
+ ASSERT_EQ(cs.data(), nullptr);
+ }
+
+ {
+ Span<int, 0> s = nullptr;
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), nullptr);
+
+ Span<const int, 0> cs = nullptr;
+ ASSERT_EQ(cs.Length(), 0U);
+ ASSERT_EQ(cs.data(), nullptr);
+ }
+
+ {
+#ifdef CONFIRM_COMPILATION_ERRORS
+ Span<int, 1> s = nullptr;
+ ASSERT_EQ(s.Length(), 1U);
+ ASSERT_EQ(s.data(), nullptr); // explains why it can't compile
+#endif
+ }
+
+ {
+ Span<int> s{ nullptr };
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), nullptr);
+
+ Span<const int> cs{ nullptr };
+ ASSERT_EQ(cs.Length(), 0U);
+ ASSERT_EQ(cs.data(), nullptr);
+ }
+
+ {
+ Span<int*> s{ nullptr };
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), nullptr);
+
+ Span<const int*> cs{ nullptr };
+ ASSERT_EQ(cs.Length(), 0U);
+ ASSERT_EQ(cs.data(), nullptr);
+ }
+}
+
+SPAN_TEST(from_nullptr_length_constructor)
+{
+ {
+ Span<int> s{ nullptr, static_cast<Span<int>::index_type>(0) };
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), nullptr);
+
+ Span<const int> cs{ nullptr, static_cast<Span<int>::index_type>(0) };
+ ASSERT_EQ(cs.Length(), 0U);
+ ASSERT_EQ(cs.data(), nullptr);
+ }
+
+ {
+ Span<int, 0> s{ nullptr, static_cast<Span<int>::index_type>(0) };
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), nullptr);
+
+ Span<const int, 0> cs{ nullptr, static_cast<Span<int>::index_type>(0) };
+ ASSERT_EQ(cs.Length(), 0U);
+ ASSERT_EQ(cs.data(), nullptr);
+ }
+
+#if 0
+ {
+ auto workaround_macro = []() { Span<int, 1> s{ nullptr, static_cast<Span<int>::index_type>(0) }; };
+ CHECK_THROW(workaround_macro(), fail_fast);
+ }
+
+ {
+ auto workaround_macro = []() { Span<int> s{nullptr, 1}; };
+ CHECK_THROW(workaround_macro(), fail_fast);
+
+ auto const_workaround_macro = []() { Span<const int> cs{nullptr, 1}; };
+ CHECK_THROW(const_workaround_macro(), fail_fast);
+ }
+
+ {
+ auto workaround_macro = []() { Span<int, 0> s{nullptr, 1}; };
+ CHECK_THROW(workaround_macro(), fail_fast);
+
+ auto const_workaround_macro = []() { Span<const int, 0> s{nullptr, 1}; };
+ CHECK_THROW(const_workaround_macro(), fail_fast);
+ }
+#endif
+ {
+ Span<int*> s{ nullptr, static_cast<Span<int>::index_type>(0) };
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), nullptr);
+
+ Span<const int*> cs{ nullptr, static_cast<Span<int>::index_type>(0) };
+ ASSERT_EQ(cs.Length(), 0U);
+ ASSERT_EQ(cs.data(), nullptr);
+ }
+}
+
+SPAN_TEST(from_pointer_length_constructor)
+{
+ int arr[4] = { 1, 2, 3, 4 };
+
+ {
+ Span<int> s{ &arr[0], 2 };
+ ASSERT_EQ(s.Length(), 2U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ ASSERT_EQ(s[0], 1);
+ ASSERT_EQ(s[1], 2);
+ }
+
+ {
+ Span<int, 2> s{ &arr[0], 2 };
+ ASSERT_EQ(s.Length(), 2U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ ASSERT_EQ(s[0], 1);
+ ASSERT_EQ(s[1], 2);
+ }
+
+ {
+ int* p = nullptr;
+ Span<int> s{ p, static_cast<Span<int>::index_type>(0) };
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), nullptr);
+ }
+
+#if 0
+ {
+ int* p = nullptr;
+ auto workaround_macro = [=]() { Span<int> s{p, 2}; };
+ CHECK_THROW(workaround_macro(), fail_fast);
+ }
+#endif
+
+ {
+ auto s = MakeSpan(&arr[0], 2);
+ ASSERT_EQ(s.Length(), 2U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ ASSERT_EQ(s[0], 1);
+ ASSERT_EQ(s[1], 2);
+ }
+
+ {
+ int* p = nullptr;
+ auto s = MakeSpan(p, static_cast<Span<int>::index_type>(0));
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), nullptr);
+ }
+
+#if 0
+ {
+ int* p = nullptr;
+ auto workaround_macro = [=]() { MakeSpan(p, 2); };
+ CHECK_THROW(workaround_macro(), fail_fast);
+ }
+#endif
+}
+
+SPAN_TEST(from_pointer_pointer_constructor)
+{
+ int arr[4] = { 1, 2, 3, 4 };
+
+ {
+ Span<int> s{ &arr[0], &arr[2] };
+ ASSERT_EQ(s.Length(), 2U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ ASSERT_EQ(s[0], 1);
+ ASSERT_EQ(s[1], 2);
+ }
+
+ {
+ Span<int, 2> s{ &arr[0], &arr[2] };
+ ASSERT_EQ(s.Length(), 2U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ ASSERT_EQ(s[0], 1);
+ ASSERT_EQ(s[1], 2);
+ }
+
+ {
+ Span<int> s{ &arr[0], &arr[0] };
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+
+ {
+ Span<int, 0> s{ &arr[0], &arr[0] };
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+
+ // this will fail the std::distance() precondition, which asserts on MSVC debug builds
+ //{
+ // auto workaround_macro = [&]() { Span<int> s{&arr[1], &arr[0]}; };
+ // CHECK_THROW(workaround_macro(), fail_fast);
+ //}
+
+ // this will fail the std::distance() precondition, which asserts on MSVC debug builds
+ //{
+ // int* p = nullptr;
+ // auto workaround_macro = [&]() { Span<int> s{&arr[0], p}; };
+ // CHECK_THROW(workaround_macro(), fail_fast);
+ //}
+
+ {
+ int* p = nullptr;
+ Span<int> s{ p, p };
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), nullptr);
+ }
+
+ {
+ int* p = nullptr;
+ Span<int, 0> s{ p, p };
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), nullptr);
+ }
+
+ // this will fail the std::distance() precondition, which asserts on MSVC debug builds
+ //{
+ // int* p = nullptr;
+ // auto workaround_macro = [&]() { Span<int> s{&arr[0], p}; };
+ // CHECK_THROW(workaround_macro(), fail_fast);
+ //}
+
+ {
+ auto s = MakeSpan(&arr[0], &arr[2]);
+ ASSERT_EQ(s.Length(), 2U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ ASSERT_EQ(s[0], 1);
+ ASSERT_EQ(s[1], 2);
+ }
+
+ {
+ auto s = MakeSpan(&arr[0], &arr[0]);
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+
+ {
+ int* p = nullptr;
+ auto s = MakeSpan(p, p);
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), nullptr);
+ }
+}
+
+SPAN_TEST(from_array_constructor)
+{
+ int arr[5] = { 1, 2, 3, 4, 5 };
+
+ {
+ Span<int> s{ arr };
+ ASSERT_EQ(s.Length(), 5U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+
+ {
+ Span<int, 5> s{ arr };
+ ASSERT_EQ(s.Length(), 5U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+
+ int arr2d[2][3] = { { 1, 2, 3 }, { 4, 5, 6 } };
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+ {
+ Span<int, 6> s{ arr };
+ }
+
+ {
+ Span<int, 0> s{ arr };
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+
+ {
+ Span<int> s{ arr2d };
+ ASSERT_EQ(s.Length(), 6U);
+ ASSERT_EQ(s.data(), &arr2d[0][0]);
+ ASSERT_EQ(s[0], 1);
+ ASSERT_EQ(s[5], 6);
+ }
+
+ {
+ Span<int, 0> s{ arr2d };
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), &arr2d[0][0]);
+ }
+
+ {
+ Span<int, 6> s{ arr2d };
+ }
+#endif
+ {
+ Span<int[3]> s{ &(arr2d[0]), 1 };
+ ASSERT_EQ(s.Length(), 1U);
+ ASSERT_EQ(s.data(), &arr2d[0]);
+ }
+
+ int arr3d[2][3][2] = { { { 1, 2 }, { 3, 4 }, { 5, 6 } },
+ { { 7, 8 }, { 9, 10 }, { 11, 12 } } };
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+ {
+ Span<int> s{ arr3d };
+ ASSERT_EQ(s.Length(), 12U);
+ ASSERT_EQ(s.data(), &arr3d[0][0][0]);
+ ASSERT_EQ(s[0], 1);
+ ASSERT_EQ(s[11], 12);
+ }
+
+ {
+ Span<int, 0> s{ arr3d };
+ ASSERT_EQ(s.Length(), 0U);
+ ASSERT_EQ(s.data(), &arr3d[0][0][0]);
+ }
+
+ {
+ Span<int, 11> s{ arr3d };
+ }
+
+ {
+ Span<int, 12> s{ arr3d };
+ ASSERT_EQ(s.Length(), 12U);
+ ASSERT_EQ(s.data(), &arr3d[0][0][0]);
+ ASSERT_EQ(s[0], 1);
+ ASSERT_EQ(s[5], 6);
+ }
+#endif
+ {
+ Span<int[3][2]> s{ &arr3d[0], 1 };
+ ASSERT_EQ(s.Length(), 1U);
+ ASSERT_EQ(s.data(), &arr3d[0]);
+ }
+
+ {
+ auto s = MakeSpan(arr);
+ ASSERT_EQ(s.Length(), 5U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+
+ {
+ auto s = MakeSpan(&(arr2d[0]), 1);
+ ASSERT_EQ(s.Length(), 1U);
+ ASSERT_EQ(s.data(), &arr2d[0]);
+ }
+
+ {
+ auto s = MakeSpan(&arr3d[0], 1);
+ ASSERT_EQ(s.Length(), 1U);
+ ASSERT_EQ(s.data(), &arr3d[0]);
+ }
+}
+
+SPAN_TEST(from_dynamic_array_constructor)
+{
+ double(*arr)[3][4] = new double[100][3][4];
+
+ {
+ Span<double> s(&arr[0][0][0], 10);
+ ASSERT_EQ(s.Length(), 10U);
+ ASSERT_EQ(s.data(), &arr[0][0][0]);
+ }
+
+ {
+ auto s = MakeSpan(&arr[0][0][0], 10);
+ ASSERT_EQ(s.Length(), 10U);
+ ASSERT_EQ(s.data(), &arr[0][0][0]);
+ }
+
+ delete[] arr;
+}
+
+SPAN_TEST(from_std_array_constructor)
+{
+ std::array<int, 4> arr = { { 1, 2, 3, 4 } };
+
+ {
+ Span<int> s{ arr };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.size()));
+ ASSERT_EQ(s.data(), arr.data());
+
+ Span<const int> cs{ arr };
+ ASSERT_EQ(cs.size(), narrow_cast<size_t>(arr.size()));
+ ASSERT_EQ(cs.data(), arr.data());
+ }
+
+ {
+ Span<int, 4> s{ arr };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.size()));
+ ASSERT_EQ(s.data(), arr.data());
+
+ Span<const int, 4> cs{ arr };
+ ASSERT_EQ(cs.size(), narrow_cast<size_t>(arr.size()));
+ ASSERT_EQ(cs.data(), arr.data());
+ }
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+ {
+ Span<int, 2> s{ arr };
+ ASSERT_EQ(s.size(), 2U);
+ ASSERT_EQ(s.data(), arr.data());
+
+ Span<const int, 2> cs{ arr };
+ ASSERT_EQ(cs.size(), 2U);
+ ASSERT_EQ(cs.data(), arr.data());
+ }
+
+ {
+ Span<int, 0> s{ arr };
+ ASSERT_EQ(s.size(), 0U);
+ ASSERT_EQ(s.data(), arr.data());
+
+ Span<const int, 0> cs{ arr };
+ ASSERT_EQ(cs.size(), 0U);
+ ASSERT_EQ(cs.data(), arr.data());
+ }
+
+ {
+ Span<int, 5> s{ arr };
+ }
+
+ {
+ auto get_an_array = []() -> std::array<int, 4> { return { 1, 2, 3, 4 }; };
+ auto take_a_Span = [](Span<int> s) { static_cast<void>(s); };
+ // try to take a temporary std::array
+ take_a_Span(get_an_array());
+ }
+#endif
+
+ {
+ auto get_an_array = []() -> std::array<int, 4> {
+ return { { 1, 2, 3, 4 } };
+ };
+ auto take_a_Span = [](Span<const int> s) { static_cast<void>(s); };
+ // try to take a temporary std::array
+ take_a_Span(get_an_array());
+ }
+
+ {
+ auto s = MakeSpan(arr);
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.size()));
+ ASSERT_EQ(s.data(), arr.data());
+ }
+}
+
+SPAN_TEST(from_const_std_array_constructor)
+{
+ const std::array<int, 4> arr = { { 1, 2, 3, 4 } };
+
+ {
+ Span<const int> s{ arr };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.size()));
+ ASSERT_EQ(s.data(), arr.data());
+ }
+
+ {
+ Span<const int, 4> s{ arr };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.size()));
+ ASSERT_EQ(s.data(), arr.data());
+ }
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+ {
+ Span<const int, 2> s{ arr };
+ ASSERT_EQ(s.size(), 2U);
+ ASSERT_EQ(s.data(), arr.data());
+ }
+
+ {
+ Span<const int, 0> s{ arr };
+ ASSERT_EQ(s.size(), 0U);
+ ASSERT_EQ(s.data(), arr.data());
+ }
+
+ {
+ Span<const int, 5> s{ arr };
+ }
+#endif
+
+ {
+ auto get_an_array = []() -> const std::array<int, 4> {
+ return { { 1, 2, 3, 4 } };
+ };
+ auto take_a_Span = [](Span<const int> s) { static_cast<void>(s); };
+ // try to take a temporary std::array
+ take_a_Span(get_an_array());
+ }
+
+ {
+ auto s = MakeSpan(arr);
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.size()));
+ ASSERT_EQ(s.data(), arr.data());
+ }
+}
+
+SPAN_TEST(from_std_array_const_constructor)
+{
+ std::array<const int, 4> arr = { { 1, 2, 3, 4 } };
+
+ {
+ Span<const int> s{ arr };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.size()));
+ ASSERT_EQ(s.data(), arr.data());
+ }
+
+ {
+ Span<const int, 4> s{ arr };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.size()));
+ ASSERT_EQ(s.data(), arr.data());
+ }
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+ {
+ Span<const int, 2> s{ arr };
+ ASSERT_EQ(s.size(), 2U);
+ ASSERT_EQ(s.data(), arr.data());
+ }
+
+ {
+ Span<const int, 0> s{ arr };
+ ASSERT_EQ(s.size(), 0U);
+ ASSERT_EQ(s.data(), arr.data());
+ }
+
+ {
+ Span<const int, 5> s{ arr };
+ }
+
+ {
+ Span<int, 4> s{ arr };
+ }
+#endif
+
+ {
+ auto s = MakeSpan(arr);
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.size()));
+ ASSERT_EQ(s.data(), arr.data());
+ }
+}
+
+SPAN_TEST(from_mozilla_array_constructor)
+{
+ mozilla::Array<int, 4> arr(1, 2, 3, 4);
+
+ {
+ Span<int> s{ arr };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.cend() - arr.cbegin()));
+ ASSERT_EQ(s.data(), &arr[0]);
+
+ Span<const int> cs{ arr };
+ ASSERT_EQ(cs.size(), narrow_cast<size_t>(arr.cend() - arr.cbegin()));
+ ASSERT_EQ(cs.data(), &arr[0]);
+ }
+
+ {
+ Span<int, 4> s{ arr };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.cend() - arr.cbegin()));
+ ASSERT_EQ(s.data(), &arr[0]);
+
+ Span<const int, 4> cs{ arr };
+ ASSERT_EQ(cs.size(), narrow_cast<size_t>(arr.cend() - arr.cbegin()));
+ ASSERT_EQ(cs.data(), &arr[0]);
+ }
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+ {
+ Span<int, 2> s{ arr };
+ ASSERT_EQ(s.size(), 2U);
+ ASSERT_EQ(s.data(), &arr[0]);
+
+ Span<const int, 2> cs{ arr };
+ ASSERT_EQ(cs.size(), 2U);
+ ASSERT_EQ(cs.data(), &arr[0]);
+ }
+
+ {
+ Span<int, 0> s{ arr };
+ ASSERT_EQ(s.size(), 0U);
+ ASSERT_EQ(s.data(), &arr[0]);
+
+ Span<const int, 0> cs{ arr };
+ ASSERT_EQ(cs.size(), 0U);
+ ASSERT_EQ(cs.data(), &arr[0]);
+ }
+
+ {
+ Span<int, 5> s{ arr };
+ }
+
+ {
+ auto get_an_array = []() -> mozilla::Array<int, 4> {
+ return { 1, 2, 3, 4 };
+ };
+ auto take_a_Span = [](Span<int> s) { static_cast<void>(s); };
+ // try to take a temporary mozilla::Array
+ take_a_Span(get_an_array());
+ }
+#endif
+
+ {
+ auto get_an_array = []() -> mozilla::Array<int, 4> {
+ return { 1, 2, 3, 4 };
+ };
+ auto take_a_Span = [](Span<const int> s) { static_cast<void>(s); };
+ // try to take a temporary mozilla::Array
+ take_a_Span(get_an_array());
+ }
+
+ {
+ auto s = MakeSpan(arr);
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.cend() - arr.cbegin()));
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+}
+
+SPAN_TEST(from_const_mozilla_array_constructor)
+{
+ const mozilla::Array<int, 4> arr(1, 2, 3, 4);
+
+ {
+ Span<const int> s{ arr };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.cend() - arr.cbegin()));
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+
+ {
+ Span<const int, 4> s{ arr };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.cend() - arr.cbegin()));
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+ {
+ Span<const int, 2> s{ arr };
+ ASSERT_EQ(s.size(), 2U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+
+ {
+ Span<const int, 0> s{ arr };
+ ASSERT_EQ(s.size(), 0U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+
+ {
+ Span<const int, 5> s{ arr };
+ }
+#endif
+
+#if 0
+ {
+ auto get_an_array = []() -> const mozilla::Array<int, 4> {
+ return { 1, 2, 3, 4 };
+ };
+ auto take_a_Span = [](Span<const int> s) { static_cast<void>(s); };
+ // try to take a temporary mozilla::Array
+ take_a_Span(get_an_array());
+ }
+#endif
+
+ {
+ auto s = MakeSpan(arr);
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.cend() - arr.cbegin()));
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+}
+
+SPAN_TEST(from_mozilla_array_const_constructor)
+{
+ mozilla::Array<const int, 4> arr(1, 2, 3, 4);
+
+ {
+ Span<const int> s{ arr };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.cend() - arr.cbegin()));
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+
+ {
+ Span<const int, 4> s{ arr };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.cend() - arr.cbegin()));
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+ {
+ Span<const int, 2> s{ arr };
+ ASSERT_EQ(s.size(), 2U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+
+ {
+ Span<const int, 0> s{ arr };
+ ASSERT_EQ(s.size(), 0U);
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+
+ {
+ Span<const int, 5> s{ arr };
+ }
+
+ {
+ Span<int, 4> s{ arr };
+ }
+#endif
+
+ {
+ auto s = MakeSpan(arr);
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(arr.cend() - arr.cbegin()));
+ ASSERT_EQ(s.data(), &arr[0]);
+ }
+}
+
+SPAN_TEST(from_container_constructor)
+{
+ std::vector<int> v = { 1, 2, 3 };
+ const std::vector<int> cv = v;
+
+ {
+ AssertSpanOfThreeInts(v);
+
+ Span<int> s{ v };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(v.size()));
+ ASSERT_EQ(s.data(), v.data());
+
+ Span<const int> cs{ v };
+ ASSERT_EQ(cs.size(), narrow_cast<size_t>(v.size()));
+ ASSERT_EQ(cs.data(), v.data());
+ }
+
+ std::string str = "hello";
+ const std::string cstr = "hello";
+
+ {
+#ifdef CONFIRM_COMPILATION_ERRORS
+ Span<char> s{ str };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(str.size()));
+ ASSERT_EQ(s.data(), str.data());
+#endif
+ Span<const char> cs{ str };
+ ASSERT_EQ(cs.size(), narrow_cast<size_t>(str.size()));
+ ASSERT_EQ(cs.data(), str.data());
+ }
+
+ {
+#ifdef CONFIRM_COMPILATION_ERRORS
+ Span<char> s{ cstr };
+#endif
+ Span<const char> cs{ cstr };
+ ASSERT_EQ(cs.size(), narrow_cast<size_t>(cstr.size()));
+ ASSERT_EQ(cs.data(), cstr.data());
+ }
+
+ {
+#ifdef CONFIRM_COMPILATION_ERRORS
+ auto get_temp_vector = []() -> std::vector<int> { return {}; };
+ auto use_Span = [](Span<int> s) { static_cast<void>(s); };
+ use_Span(get_temp_vector());
+#endif
+ }
+
+ {
+ auto get_temp_vector = []() -> std::vector<int> { return {}; };
+ auto use_Span = [](Span<const int> s) { static_cast<void>(s); };
+ use_Span(get_temp_vector());
+ }
+
+ {
+#ifdef CONFIRM_COMPILATION_ERRORS
+ auto get_temp_string = []() -> std::string { return {}; };
+ auto use_Span = [](Span<char> s) { static_cast<void>(s); };
+ use_Span(get_temp_string());
+#endif
+ }
+
+ {
+ auto get_temp_string = []() -> std::string { return {}; };
+ auto use_Span = [](Span<const char> s) { static_cast<void>(s); };
+ use_Span(get_temp_string());
+ }
+
+ {
+#ifdef CONFIRM_COMPILATION_ERRORS
+ auto get_temp_vector = []() -> const std::vector<int> { return {}; };
+ auto use_Span = [](Span<const char> s) { static_cast<void>(s); };
+ use_Span(get_temp_vector());
+#endif
+ }
+
+ {
+ auto get_temp_string = []() -> const std::string { return {}; };
+ auto use_Span = [](Span<const char> s) { static_cast<void>(s); };
+ use_Span(get_temp_string());
+ }
+
+ {
+#ifdef CONFIRM_COMPILATION_ERRORS
+ std::map<int, int> m;
+ Span<int> s{ m };
+#endif
+ }
+
+ {
+ auto s = MakeSpan(v);
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(v.size()));
+ ASSERT_EQ(s.data(), v.data());
+
+ auto cs = MakeSpan(cv);
+ ASSERT_EQ(cs.size(), narrow_cast<size_t>(cv.size()));
+ ASSERT_EQ(cs.data(), cv.data());
+ }
+}
+
+SPAN_TEST(from_xpcom_collections)
+{
+ {
+ nsTArray<int> v;
+ v.AppendElement(1);
+ v.AppendElement(2);
+ v.AppendElement(3);
+
+ AssertSpanOfThreeInts(v);
+
+ Span<int> s{ v };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(v.Length()));
+ ASSERT_EQ(s.data(), v.Elements());
+ ASSERT_EQ(s[2], 3);
+
+ Span<const int> cs{ v };
+ ASSERT_EQ(cs.size(), narrow_cast<size_t>(v.Length()));
+ ASSERT_EQ(cs.data(), v.Elements());
+ ASSERT_EQ(cs[2], 3);
+ }
+ {
+ nsTArray<int> v;
+ v.AppendElement(1);
+ v.AppendElement(2);
+ v.AppendElement(3);
+
+ AssertSpanOfThreeInts(v);
+
+ auto s = MakeSpan(v);
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(v.Length()));
+ ASSERT_EQ(s.data(), v.Elements());
+ ASSERT_EQ(s[2], 3);
+ }
+ {
+ AutoTArray<int, 5> v;
+ v.AppendElement(1);
+ v.AppendElement(2);
+ v.AppendElement(3);
+
+ AssertSpanOfThreeInts(v);
+
+ Span<int> s{ v };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(v.Length()));
+ ASSERT_EQ(s.data(), v.Elements());
+ ASSERT_EQ(s[2], 3);
+
+ Span<const int> cs{ v };
+ ASSERT_EQ(cs.size(), narrow_cast<size_t>(v.Length()));
+ ASSERT_EQ(cs.data(), v.Elements());
+ ASSERT_EQ(cs[2], 3);
+ }
+ {
+ AutoTArray<int, 5> v;
+ v.AppendElement(1);
+ v.AppendElement(2);
+ v.AppendElement(3);
+
+ AssertSpanOfThreeInts(v);
+
+ auto s = MakeSpan(v);
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(v.Length()));
+ ASSERT_EQ(s.data(), v.Elements());
+ ASSERT_EQ(s[2], 3);
+ }
+ {
+ FallibleTArray<int> v;
+ *(v.AppendElement(fallible)) = 1;
+ *(v.AppendElement(fallible)) = 2;
+ *(v.AppendElement(fallible)) = 3;
+
+ AssertSpanOfThreeInts(v);
+
+ Span<int> s{ v };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(v.Length()));
+ ASSERT_EQ(s.data(), v.Elements());
+ ASSERT_EQ(s[2], 3);
+
+ Span<const int> cs{ v };
+ ASSERT_EQ(cs.size(), narrow_cast<size_t>(v.Length()));
+ ASSERT_EQ(cs.data(), v.Elements());
+ ASSERT_EQ(cs[2], 3);
+ }
+ {
+ FallibleTArray<int> v;
+ *(v.AppendElement(fallible)) = 1;
+ *(v.AppendElement(fallible)) = 2;
+ *(v.AppendElement(fallible)) = 3;
+
+ AssertSpanOfThreeInts(v);
+
+ auto s = MakeSpan(v);
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(v.Length()));
+ ASSERT_EQ(s.data(), v.Elements());
+ ASSERT_EQ(s[2], 3);
+ }
+ {
+ nsAutoString str;
+ str.AssignLiteral("abc");
+
+ AssertSpanOfThreeChar16s(str);
+ AssertSpanOfThreeChar16sViaString(str);
+
+ Span<char16_t> s{ str };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(str.Length()));
+ ASSERT_EQ(s.data(), str.BeginWriting());
+ ASSERT_EQ(s[2], 'c');
+
+ Span<const char16_t> cs{ str };
+ ASSERT_EQ(cs.size(), narrow_cast<size_t>(str.Length()));
+ ASSERT_EQ(cs.data(), str.BeginReading());
+ ASSERT_EQ(cs[2], 'c');
+ }
+ {
+ nsAutoString str;
+ str.AssignLiteral("abc");
+
+ AssertSpanOfThreeChar16s(str);
+ AssertSpanOfThreeChar16sViaString(str);
+
+ auto s = MakeSpan(str);
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(str.Length()));
+ ASSERT_EQ(s.data(), str.BeginWriting());
+ ASSERT_EQ(s[2], 'c');
+ }
+ {
+ nsAutoCString str;
+ str.AssignLiteral("abc");
+
+ AssertSpanOfThreeChars(str);
+ AssertSpanOfThreeCharsViaString(str);
+
+ Span<uint8_t> s{ str };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(str.Length()));
+ ASSERT_EQ(s.data(), reinterpret_cast<uint8_t*>(str.BeginWriting()));
+ ASSERT_EQ(s[2], 'c');
+
+ Span<const uint8_t> cs{ str };
+ ASSERT_EQ(cs.size(), narrow_cast<size_t>(str.Length()));
+ ASSERT_EQ(cs.data(), reinterpret_cast<const uint8_t*>(str.BeginReading()));
+ ASSERT_EQ(cs[2], 'c');
+ }
+ {
+ nsAutoCString str;
+ str.AssignLiteral("abc");
+
+ AssertSpanOfThreeChars(str);
+ AssertSpanOfThreeCharsViaString(str);
+
+ auto s = MakeSpan(str);
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(str.Length()));
+ ASSERT_EQ(s.data(), str.BeginWriting());
+ ASSERT_EQ(s[2], 'c');
+ }
+ {
+ nsTArray<int> v;
+ v.AppendElement(1);
+ v.AppendElement(2);
+ v.AppendElement(3);
+
+ Range<int> r(v.Elements(), v.Length());
+
+ AssertSpanOfThreeInts(r);
+
+ Span<int> s{ r };
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(v.Length()));
+ ASSERT_EQ(s.data(), v.Elements());
+ ASSERT_EQ(s[2], 3);
+
+ Span<const int> cs{ r };
+ ASSERT_EQ(cs.size(), narrow_cast<size_t>(v.Length()));
+ ASSERT_EQ(cs.data(), v.Elements());
+ ASSERT_EQ(cs[2], 3);
+ }
+ {
+ nsTArray<int> v;
+ v.AppendElement(1);
+ v.AppendElement(2);
+ v.AppendElement(3);
+
+ Range<int> r(v.Elements(), v.Length());
+
+ AssertSpanOfThreeInts(r);
+
+ auto s = MakeSpan(r);
+ ASSERT_EQ(s.size(), narrow_cast<size_t>(v.Length()));
+ ASSERT_EQ(s.data(), v.Elements());
+ ASSERT_EQ(s[2], 3);
+ }
+}
+
+SPAN_TEST(from_cstring)
+{
+ {
+ const char* str = "abc";
+
+ auto cs = MakeCStringSpan(str);
+ ASSERT_EQ(cs.size(), 3U);
+ ASSERT_EQ(cs.data(), str);
+ ASSERT_EQ(cs[2], 'c');
+ }
+}
+
+SPAN_TEST(from_convertible_Span_constructor){
+ {
+ Span<DerivedClass> avd;
+ Span<const DerivedClass> avcd = avd;
+ static_cast<void>(avcd);
+ }
+
+ {
+#ifdef CONFIRM_COMPILATION_ERRORS
+ Span<DerivedClass> avd;
+ Span<BaseClass> avb = avd;
+ static_cast<void>(avb);
+#endif
+ }
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+ {
+ Span<int> s;
+ Span<unsigned int> s2 = s;
+ static_cast<void>(s2);
+ }
+
+ {
+ Span<int> s;
+ Span<const unsigned int> s2 = s;
+ static_cast<void>(s2);
+ }
+
+ {
+ Span<int> s;
+ Span<short> s2 = s;
+ static_cast<void>(s2);
+ }
+#endif
+}
+
+SPAN_TEST(copy_move_and_assignment)
+{
+ Span<int> s1;
+ ASSERT_TRUE(s1.empty());
+
+ int arr[] = { 3, 4, 5 };
+
+ Span<const int> s2 = arr;
+ ASSERT_EQ(s2.Length(), 3U);
+ ASSERT_EQ(s2.data(), &arr[0]);
+
+ s2 = s1;
+ ASSERT_TRUE(s2.empty());
+
+ auto get_temp_Span = [&]() -> Span<int> { return { &arr[1], 2 }; };
+ auto use_Span = [&](Span<const int> s) {
+ ASSERT_EQ(s.Length(), 2U);
+ ASSERT_EQ(s.data(), &arr[1]);
+ };
+ use_Span(get_temp_Span());
+
+ s1 = get_temp_Span();
+ ASSERT_EQ(s1.Length(), 2U);
+ ASSERT_EQ(s1.data(), &arr[1]);
+}
+
+SPAN_TEST(first)
+{
+ int arr[5] = { 1, 2, 3, 4, 5 };
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ(av.First<2>().Length(), 2U);
+ ASSERT_EQ(av.First(2).Length(), 2U);
+ }
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ(av.First<0>().Length(), 0U);
+ ASSERT_EQ(av.First(0).Length(), 0U);
+ }
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ(av.First<5>().Length(), 5U);
+ ASSERT_EQ(av.First(5).Length(), 5U);
+ }
+
+#if 0
+ {
+ Span<int, 5> av = arr;
+#ifdef CONFIRM_COMPILATION_ERRORS
+ ASSERT_EQ(av.First<6>().Length() , 6U);
+ ASSERT_EQ(av.First<-1>().Length() , -1);
+#endif
+ CHECK_THROW(av.First(6).Length(), fail_fast);
+ }
+#endif
+
+ {
+ Span<int> av;
+ ASSERT_EQ(av.First<0>().Length(), 0U);
+ ASSERT_EQ(av.First(0).Length(), 0U);
+ }
+}
+
+SPAN_TEST(last)
+{
+ int arr[5] = { 1, 2, 3, 4, 5 };
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ(av.Last<2>().Length(), 2U);
+ ASSERT_EQ(av.Last(2).Length(), 2U);
+ }
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ(av.Last<0>().Length(), 0U);
+ ASSERT_EQ(av.Last(0).Length(), 0U);
+ }
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ(av.Last<5>().Length(), 5U);
+ ASSERT_EQ(av.Last(5).Length(), 5U);
+ }
+
+#if 0
+ {
+ Span<int, 5> av = arr;
+#ifdef CONFIRM_COMPILATION_ERRORS
+ ASSERT_EQ(av.Last<6>().Length() , 6U);
+#endif
+ CHECK_THROW(av.Last(6).Length(), fail_fast);
+ }
+#endif
+
+ {
+ Span<int> av;
+ ASSERT_EQ(av.Last<0>().Length(), 0U);
+ ASSERT_EQ(av.Last(0).Length(), 0U);
+ }
+}
+
+SPAN_TEST(from_to)
+{
+ int arr[5] = { 1, 2, 3, 4, 5 };
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ(av.From(3).Length(), 2U);
+ ASSERT_EQ(av.From(2)[1], 4);
+ }
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ(av.From(5).Length(), 0U);
+ }
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ(av.From(0).Length(), 5U);
+ }
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ(av.To(3).Length(), 3U);
+ ASSERT_EQ(av.To(3)[1], 2);
+ }
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ(av.To(0).Length(), 0U);
+ }
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ(av.To(5).Length(), 5U);
+ }
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ(av.FromTo(1, 4).Length(), 3U);
+ ASSERT_EQ(av.FromTo(1, 4)[1], 3);
+ }
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ(av.FromTo(2, 2).Length(), 0U);
+ }
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ(av.FromTo(0, 5).Length(), 5U);
+ }
+}
+
+SPAN_TEST(Subspan)
+{
+ int arr[5] = { 1, 2, 3, 4, 5 };
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ((av.Subspan<2, 2>().Length()), 2U);
+ ASSERT_EQ(av.Subspan(2, 2).Length(), 2U);
+ ASSERT_EQ(av.Subspan(2, 3).Length(), 3U);
+ }
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ((av.Subspan<0, 0>().Length()), 0U);
+ ASSERT_EQ(av.Subspan(0, 0).Length(), 0U);
+ }
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ((av.Subspan<0, 5>().Length()), 5U);
+ ASSERT_EQ(av.Subspan(0, 5).Length(), 5U);
+ CHECK_THROW(av.Subspan(0, 6).Length(), fail_fast);
+ CHECK_THROW(av.Subspan(1, 5).Length(), fail_fast);
+ }
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ((av.Subspan<4, 0>().Length()), 0U);
+ ASSERT_EQ(av.Subspan(4, 0).Length(), 0U);
+ ASSERT_EQ(av.Subspan(5, 0).Length(), 0U);
+ CHECK_THROW(av.Subspan(6, 0).Length(), fail_fast);
+ }
+
+ {
+ Span<int> av;
+ ASSERT_EQ((av.Subspan<0, 0>().Length()), 0U);
+ ASSERT_EQ(av.Subspan(0, 0).Length(), 0U);
+ CHECK_THROW((av.Subspan<1, 0>().Length()), fail_fast);
+ }
+
+ {
+ Span<int> av;
+ ASSERT_EQ(av.Subspan(0).Length(), 0U);
+ CHECK_THROW(av.Subspan(1).Length(), fail_fast);
+ }
+
+ {
+ Span<int> av = arr;
+ ASSERT_EQ(av.Subspan(0).Length(), 5U);
+ ASSERT_EQ(av.Subspan(1).Length(), 4U);
+ ASSERT_EQ(av.Subspan(4).Length(), 1U);
+ ASSERT_EQ(av.Subspan(5).Length(), 0U);
+ CHECK_THROW(av.Subspan(6).Length(), fail_fast);
+ auto av2 = av.Subspan(1);
+ for (int i = 0; i < 4; ++i)
+ ASSERT_EQ(av2[i], i + 2);
+ }
+
+ {
+ Span<int, 5> av = arr;
+ ASSERT_EQ(av.Subspan(0).Length(), 5U);
+ ASSERT_EQ(av.Subspan(1).Length(), 4U);
+ ASSERT_EQ(av.Subspan(4).Length(), 1U);
+ ASSERT_EQ(av.Subspan(5).Length(), 0U);
+ CHECK_THROW(av.Subspan(6).Length(), fail_fast);
+ auto av2 = av.Subspan(1);
+ for (int i = 0; i < 4; ++i)
+ ASSERT_EQ(av2[i], i + 2);
+ }
+}
+
+SPAN_TEST(at_call)
+{
+ int arr[4] = { 1, 2, 3, 4 };
+
+ {
+ Span<int> s = arr;
+ ASSERT_EQ(s.at(0), 1);
+ CHECK_THROW(s.at(5), fail_fast);
+ }
+
+ {
+ int arr2d[2] = { 1, 6 };
+ Span<int, 2> s = arr2d;
+ ASSERT_EQ(s.at(0), 1);
+ ASSERT_EQ(s.at(1), 6);
+ CHECK_THROW(s.at(2), fail_fast);
+ }
+}
+
+SPAN_TEST(operator_function_call)
+{
+ int arr[4] = { 1, 2, 3, 4 };
+
+ {
+ Span<int> s = arr;
+ ASSERT_EQ(s(0), 1);
+ CHECK_THROW(s(5), fail_fast);
+ }
+
+ {
+ int arr2d[2] = { 1, 6 };
+ Span<int, 2> s = arr2d;
+ ASSERT_EQ(s(0), 1);
+ ASSERT_EQ(s(1), 6);
+ CHECK_THROW(s(2), fail_fast);
+ }
+}
+
+SPAN_TEST(iterator_default_init)
+{
+ Span<int>::iterator it1;
+ Span<int>::iterator it2;
+ ASSERT_EQ(it1, it2);
+}
+
+SPAN_TEST(const_iterator_default_init)
+{
+ Span<int>::const_iterator it1;
+ Span<int>::const_iterator it2;
+ ASSERT_EQ(it1, it2);
+}
+
+SPAN_TEST(iterator_conversions)
+{
+ Span<int>::iterator badIt;
+ Span<int>::const_iterator badConstIt;
+ ASSERT_EQ(badIt, badConstIt);
+
+ int a[] = { 1, 2, 3, 4 };
+ Span<int> s = a;
+
+ auto it = s.begin();
+ auto cit = s.cbegin();
+
+ ASSERT_EQ(it, cit);
+ ASSERT_EQ(cit, it);
+
+ Span<int>::const_iterator cit2 = it;
+ ASSERT_EQ(cit2, cit);
+
+ Span<int>::const_iterator cit3 = it + 4;
+ ASSERT_EQ(cit3, s.cend());
+}
+
+SPAN_TEST(iterator_comparisons)
+{
+ int a[] = { 1, 2, 3, 4 };
+ {
+ Span<int> s = a;
+ Span<int>::iterator it = s.begin();
+ auto it2 = it + 1;
+ Span<int>::const_iterator cit = s.cbegin();
+
+ ASSERT_EQ(it, cit);
+ ASSERT_EQ(cit, it);
+ ASSERT_EQ(it, it);
+ ASSERT_EQ(cit, cit);
+ ASSERT_EQ(cit, s.begin());
+ ASSERT_EQ(s.begin(), cit);
+ ASSERT_EQ(s.cbegin(), cit);
+ ASSERT_EQ(it, s.begin());
+ ASSERT_EQ(s.begin(), it);
+
+ ASSERT_NE(it, it2);
+ ASSERT_NE(it2, it);
+ ASSERT_NE(it, s.end());
+ ASSERT_NE(it2, s.end());
+ ASSERT_NE(s.end(), it);
+ ASSERT_NE(it2, cit);
+ ASSERT_NE(cit, it2);
+
+ ASSERT_LT(it, it2);
+ ASSERT_LE(it, it2);
+ ASSERT_LE(it2, s.end());
+ ASSERT_LT(it, s.end());
+ ASSERT_LE(it, cit);
+ ASSERT_LE(cit, it);
+ ASSERT_LT(cit, it2);
+ ASSERT_LE(cit, it2);
+ ASSERT_LT(cit, s.end());
+ ASSERT_LE(cit, s.end());
+
+ ASSERT_GT(it2, it);
+ ASSERT_GE(it2, it);
+ ASSERT_GT(s.end(), it2);
+ ASSERT_GE(s.end(), it2);
+ ASSERT_GT(it2, cit);
+ ASSERT_GE(it2, cit);
+ }
+}
+
+SPAN_TEST(begin_end)
+{
+ {
+ int a[] = { 1, 2, 3, 4 };
+ Span<int> s = a;
+
+ Span<int>::iterator it = s.begin();
+ Span<int>::iterator it2 = std::begin(s);
+ ASSERT_EQ(it, it2);
+
+ it = s.end();
+ it2 = std::end(s);
+ ASSERT_EQ(it, it2);
+ }
+
+ {
+ int a[] = { 1, 2, 3, 4 };
+ Span<int> s = a;
+
+ auto it = s.begin();
+ auto first = it;
+ ASSERT_EQ(it, first);
+ ASSERT_EQ(*it, 1);
+
+ auto beyond = s.end();
+ ASSERT_NE(it, beyond);
+ CHECK_THROW(*beyond, fail_fast);
+
+ ASSERT_EQ(beyond - first, 4U);
+ ASSERT_EQ(first - first, 0U);
+ ASSERT_EQ(beyond - beyond, 0U);
+
+ ++it;
+ ASSERT_EQ(it - first, 1U);
+ ASSERT_EQ(*it, 2);
+ *it = 22;
+ ASSERT_EQ(*it, 22);
+ ASSERT_EQ(beyond - it, 3U);
+
+ it = first;
+ ASSERT_EQ(it, first);
+ while (it != s.end()) {
+ *it = 5;
+ ++it;
+ }
+
+ ASSERT_EQ(it, beyond);
+ ASSERT_EQ(it - beyond, 0U);
+
+ for (auto& n : s) {
+ ASSERT_EQ(n, 5);
+ }
+ }
+}
+
+SPAN_TEST(cbegin_cend)
+{
+#if 0
+ {
+ int a[] = { 1, 2, 3, 4 };
+ Span<int> s = a;
+
+ Span<int>::const_iterator cit = s.cbegin();
+ Span<int>::const_iterator cit2 = std::cbegin(s);
+ ASSERT_EQ(cit , cit2);
+
+ cit = s.cend();
+ cit2 = std::cend(s);
+ ASSERT_EQ(cit , cit2);
+ }
+#endif
+ {
+ int a[] = { 1, 2, 3, 4 };
+ Span<int> s = a;
+
+ auto it = s.cbegin();
+ auto first = it;
+ ASSERT_EQ(it, first);
+ ASSERT_EQ(*it, 1);
+
+ auto beyond = s.cend();
+ ASSERT_NE(it, beyond);
+ CHECK_THROW(*beyond, fail_fast);
+
+ ASSERT_EQ(beyond - first, 4U);
+ ASSERT_EQ(first - first, 0U);
+ ASSERT_EQ(beyond - beyond, 0U);
+
+ ++it;
+ ASSERT_EQ(it - first, 1U);
+ ASSERT_EQ(*it, 2);
+ ASSERT_EQ(beyond - it, 3U);
+
+ int last = 0;
+ it = first;
+ ASSERT_EQ(it, first);
+ while (it != s.cend()) {
+ ASSERT_EQ(*it, last + 1);
+
+ last = *it;
+ ++it;
+ }
+
+ ASSERT_EQ(it, beyond);
+ ASSERT_EQ(it - beyond, 0U);
+ }
+}
+
+SPAN_TEST(rbegin_rend)
+{
+ {
+ int a[] = { 1, 2, 3, 4 };
+ Span<int> s = a;
+
+ auto it = s.rbegin();
+ auto first = it;
+ ASSERT_EQ(it, first);
+ ASSERT_EQ(*it, 4);
+
+ auto beyond = s.rend();
+ ASSERT_NE(it, beyond);
+ CHECK_THROW(*beyond, fail_fast);
+
+ ASSERT_EQ(beyond - first, 4U);
+ ASSERT_EQ(first - first, 0U);
+ ASSERT_EQ(beyond - beyond, 0U);
+
+ ++it;
+ ASSERT_EQ(it - first, 1U);
+ ASSERT_EQ(*it, 3);
+ *it = 22;
+ ASSERT_EQ(*it, 22);
+ ASSERT_EQ(beyond - it, 3U);
+
+ it = first;
+ ASSERT_EQ(it, first);
+ while (it != s.rend()) {
+ *it = 5;
+ ++it;
+ }
+
+ ASSERT_EQ(it, beyond);
+ ASSERT_EQ(it - beyond, 0U);
+
+ for (auto& n : s) {
+ ASSERT_EQ(n, 5);
+ }
+ }
+}
+
+SPAN_TEST(crbegin_crend)
+{
+ {
+ int a[] = { 1, 2, 3, 4 };
+ Span<int> s = a;
+
+ auto it = s.crbegin();
+ auto first = it;
+ ASSERT_EQ(it, first);
+ ASSERT_EQ(*it, 4);
+
+ auto beyond = s.crend();
+ ASSERT_NE(it, beyond);
+ CHECK_THROW(*beyond, fail_fast);
+
+ ASSERT_EQ(beyond - first, 4U);
+ ASSERT_EQ(first - first, 0U);
+ ASSERT_EQ(beyond - beyond, 0U);
+
+ ++it;
+ ASSERT_EQ(it - first, 1U);
+ ASSERT_EQ(*it, 3);
+ ASSERT_EQ(beyond - it, 3U);
+
+ it = first;
+ ASSERT_EQ(it, first);
+ int last = 5;
+ while (it != s.crend()) {
+ ASSERT_EQ(*it, last - 1);
+ last = *it;
+
+ ++it;
+ }
+
+ ASSERT_EQ(it, beyond);
+ ASSERT_EQ(it - beyond, 0U);
+ }
+}
+
+SPAN_TEST(comparison_operators)
+{
+ {
+ Span<int> s1 = nullptr;
+ Span<int> s2 = nullptr;
+ ASSERT_EQ(s1, s2);
+ ASSERT_FALSE(s1 != s2);
+ ASSERT_FALSE(s1 < s2);
+ ASSERT_LE(s1, s2);
+ ASSERT_FALSE(s1 > s2);
+ ASSERT_GE(s1, s2);
+ ASSERT_EQ(s2, s1);
+ ASSERT_FALSE(s2 != s1);
+ ASSERT_FALSE(s2 < s1);
+ ASSERT_LE(s2, s1);
+ ASSERT_FALSE(s2 > s1);
+ ASSERT_GE(s2, s1);
+ }
+
+ {
+ int arr[] = { 2, 1 };
+ Span<int> s1 = arr;
+ Span<int> s2 = arr;
+
+ ASSERT_EQ(s1, s2);
+ ASSERT_FALSE(s1 != s2);
+ ASSERT_FALSE(s1 < s2);
+ ASSERT_LE(s1, s2);
+ ASSERT_FALSE(s1 > s2);
+ ASSERT_GE(s1, s2);
+ ASSERT_EQ(s2, s1);
+ ASSERT_FALSE(s2 != s1);
+ ASSERT_FALSE(s2 < s1);
+ ASSERT_LE(s2, s1);
+ ASSERT_FALSE(s2 > s1);
+ ASSERT_GE(s2, s1);
+ }
+
+ {
+ int arr[] = { 2, 1 }; // bigger
+
+ Span<int> s1 = nullptr;
+ Span<int> s2 = arr;
+
+ ASSERT_NE(s1, s2);
+ ASSERT_NE(s2, s1);
+ ASSERT_NE(s1, s2);
+ ASSERT_NE(s2, s1);
+ ASSERT_LT(s1, s2);
+ ASSERT_FALSE(s2 < s1);
+ ASSERT_LE(s1, s2);
+ ASSERT_FALSE(s2 <= s1);
+ ASSERT_GT(s2, s1);
+ ASSERT_FALSE(s1 > s2);
+ ASSERT_GE(s2, s1);
+ ASSERT_FALSE(s1 >= s2);
+ }
+
+ {
+ int arr1[] = { 1, 2 };
+ int arr2[] = { 1, 2 };
+ Span<int> s1 = arr1;
+ Span<int> s2 = arr2;
+
+ ASSERT_EQ(s1, s2);
+ ASSERT_FALSE(s1 != s2);
+ ASSERT_FALSE(s1 < s2);
+ ASSERT_LE(s1, s2);
+ ASSERT_FALSE(s1 > s2);
+ ASSERT_GE(s1, s2);
+ ASSERT_EQ(s2, s1);
+ ASSERT_FALSE(s2 != s1);
+ ASSERT_FALSE(s2 < s1);
+ ASSERT_LE(s2, s1);
+ ASSERT_FALSE(s2 > s1);
+ ASSERT_GE(s2, s1);
+ }
+
+ {
+ int arr[] = { 1, 2, 3 };
+
+ AssertSpanOfThreeInts(arr);
+
+ Span<int> s1 = { &arr[0], 2 }; // shorter
+ Span<int> s2 = arr; // longer
+
+ ASSERT_NE(s1, s2);
+ ASSERT_NE(s2, s1);
+ ASSERT_NE(s1, s2);
+ ASSERT_NE(s2, s1);
+ ASSERT_LT(s1, s2);
+ ASSERT_FALSE(s2 < s1);
+ ASSERT_LE(s1, s2);
+ ASSERT_FALSE(s2 <= s1);
+ ASSERT_GT(s2, s1);
+ ASSERT_FALSE(s1 > s2);
+ ASSERT_GE(s2, s1);
+ ASSERT_FALSE(s1 >= s2);
+ }
+
+ {
+ int arr1[] = { 1, 2 }; // smaller
+ int arr2[] = { 2, 1 }; // bigger
+
+ Span<int> s1 = arr1;
+ Span<int> s2 = arr2;
+
+ ASSERT_NE(s1, s2);
+ ASSERT_NE(s2, s1);
+ ASSERT_NE(s1, s2);
+ ASSERT_NE(s2, s1);
+ ASSERT_LT(s1, s2);
+ ASSERT_FALSE(s2 < s1);
+ ASSERT_LE(s1, s2);
+ ASSERT_FALSE(s2 <= s1);
+ ASSERT_GT(s2, s1);
+ ASSERT_FALSE(s1 > s2);
+ ASSERT_GE(s2, s1);
+ ASSERT_FALSE(s1 >= s2);
+ }
+}
+
+SPAN_TEST(as_bytes)
+{
+ int a[] = { 1, 2, 3, 4 };
+
+ {
+ Span<const int> s = a;
+ ASSERT_EQ(s.Length(), 4U);
+ Span<const uint8_t> bs = AsBytes(s);
+ ASSERT_EQ(static_cast<const void*>(bs.data()),
+ static_cast<const void*>(s.data()));
+ ASSERT_EQ(bs.Length(), s.LengthBytes());
+ }
+
+ {
+ Span<int> s;
+ auto bs = AsBytes(s);
+ ASSERT_EQ(bs.Length(), s.Length());
+ ASSERT_EQ(bs.Length(), 0U);
+ ASSERT_EQ(bs.size_bytes(), 0U);
+ ASSERT_EQ(static_cast<const void*>(bs.data()),
+ static_cast<const void*>(s.data()));
+ ASSERT_EQ(bs.data(), nullptr);
+ }
+
+ {
+ Span<int> s = a;
+ auto bs = AsBytes(s);
+ ASSERT_EQ(static_cast<const void*>(bs.data()),
+ static_cast<const void*>(s.data()));
+ ASSERT_EQ(bs.Length(), s.LengthBytes());
+ }
+}
+
+SPAN_TEST(as_writable_bytes)
+{
+ int a[] = { 1, 2, 3, 4 };
+
+ {
+#ifdef CONFIRM_COMPILATION_ERRORS
+ // you should not be able to get writeable bytes for const objects
+ Span<const int> s = a;
+ ASSERT_EQ(s.Length(), 4U);
+ Span<const byte> bs = AsWritableBytes(s);
+ ASSERT_EQ(static_cast<void*>(bs.data()), static_cast<void*>(s.data()));
+ ASSERT_EQ(bs.Length(), s.LengthBytes());
+#endif
+ }
+
+ {
+ Span<int> s;
+ auto bs = AsWritableBytes(s);
+ ASSERT_EQ(bs.Length(), s.Length());
+ ASSERT_EQ(bs.Length(), 0U);
+ ASSERT_EQ(bs.size_bytes(), 0U);
+ ASSERT_EQ(static_cast<void*>(bs.data()), static_cast<void*>(s.data()));
+ ASSERT_EQ(bs.data(), nullptr);
+ }
+
+ {
+ Span<int> s = a;
+ auto bs = AsWritableBytes(s);
+ ASSERT_EQ(static_cast<void*>(bs.data()), static_cast<void*>(s.data()));
+ ASSERT_EQ(bs.Length(), s.LengthBytes());
+ }
+}
+
+SPAN_TEST(fixed_size_conversions)
+{
+ int arr[] = { 1, 2, 3, 4 };
+
+ // converting to an Span from an equal size array is ok
+ Span<int, 4> s4 = arr;
+ ASSERT_EQ(s4.Length(), 4U);
+
+ // converting to dynamic_range is always ok
+ {
+ Span<int> s = s4;
+ ASSERT_EQ(s.Length(), s4.Length());
+ static_cast<void>(s);
+ }
+
+// initialization or assignment to static Span that REDUCES size is NOT ok
+#ifdef CONFIRM_COMPILATION_ERRORS
+ {
+ Span<int, 2> s = arr;
+ }
+ {
+ Span<int, 2> s2 = s4;
+ static_cast<void>(s2);
+ }
+#endif
+
+#if 0
+ // even when done dynamically
+ {
+ Span<int> s = arr;
+ auto f = [&]() {
+ Span<int, 2> s2 = s;
+ static_cast<void>(s2);
+ };
+ CHECK_THROW(f(), fail_fast);
+ }
+#endif
+
+ // but doing so explicitly is ok
+
+ // you can convert statically
+ {
+ Span<int, 2> s2 = { arr, 2 };
+ static_cast<void>(s2);
+ }
+ {
+ Span<int, 1> s1 = s4.First<1>();
+ static_cast<void>(s1);
+ }
+
+ // ...or dynamically
+ {
+ // NB: implicit conversion to Span<int,1> from Span<int>
+ Span<int, 1> s1 = s4.First(1);
+ static_cast<void>(s1);
+ }
+
+#if 0
+ // initialization or assignment to static Span that requires size INCREASE is not ok.
+ int arr2[2] = {1, 2};
+#endif
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+ {
+ Span<int, 4> s3 = arr2;
+ }
+ {
+ Span<int, 2> s2 = arr2;
+ Span<int, 4> s4a = s2;
+ }
+#endif
+
+#if 0
+ {
+ auto f = [&]() {
+ Span<int, 4> _s4 = {arr2, 2};
+ static_cast<void>(_s4);
+ };
+ CHECK_THROW(f(), fail_fast);
+ }
+
+ // this should fail - we are trying to assign a small dynamic Span to a fixed_size larger one
+ Span<int> av = arr2;
+ auto f = [&]() {
+ Span<int, 4> _s4 = av;
+ static_cast<void>(_s4);
+ };
+ CHECK_THROW(f(), fail_fast);
+#endif
+}
+
+#if 0
+ SPAN_TEST(interop_with_std_regex)
+ {
+ char lat[] = { '1', '2', '3', '4', '5', '6', 'E', 'F', 'G' };
+ Span<char> s = lat;
+ auto f_it = s.begin() + 7;
+
+ std::match_results<Span<char>::iterator> match;
+
+ std::regex_match(s.begin(), s.end(), match, std::regex(".*"));
+ ASSERT_EQ(match.ready());
+ ASSERT_TRUE(!match.empty());
+ ASSERT_TRUE(match[0].matched);
+ ASSERT_TRUE(match[0].first , s.begin());
+ ASSERT_EQ(match[0].second , s.end());
+
+ std::regex_search(s.begin(), s.end(), match, std::regex("F"));
+ ASSERT_TRUE(match.ready());
+ ASSERT_TRUE(!match.empty());
+ ASSERT_TRUE(match[0].matched);
+ ASSERT_EQ(match[0].first , f_it);
+ ASSERT_EQ(match[0].second , (f_it + 1));
+ }
+
+SPAN_TEST(interop_with_gsl_at)
+{
+ int arr[5] = { 1, 2, 3, 4, 5 };
+ Span<int> s{ arr };
+ ASSERT_EQ(at(s, 0) , 1 );
+ASSERT_EQ(at(s, 1) , 2U);
+}
+#endif
+
+SPAN_TEST(default_constructible)
+{
+ ASSERT_TRUE((std::is_default_constructible<Span<int>>::value));
+ ASSERT_TRUE((std::is_default_constructible<Span<int, 0>>::value));
+ ASSERT_TRUE((!std::is_default_constructible<Span<int, 42>>::value));
+}
diff --git a/mfbt/tests/gtest/moz.build b/mfbt/tests/gtest/moz.build
new file mode 100644
index 000000000..bd559d60b
--- /dev/null
+++ b/mfbt/tests/gtest/moz.build
@@ -0,0 +1,15 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+UNIFIED_SOURCES += [
+ 'TestSpan.cpp',
+]
+
+#LOCAL_INCLUDES += [
+# '../../base',
+#]
+
+FINAL_LIBRARY = 'xul-gtest'
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-01 20:55:52 +0000