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initial impl of P1976R2

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Jordan Maples committed 2020-05-19 16:27:46 -07:00
1 parent 1999b48a51
commit 2085c7acde
6 files changed
+1267 -1241
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tests/span_compatibility_tests.cpp
+8 -6
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@@ -846,8 +846,6 @@ static_assert(!std::is_constructible<gsl::span<int, 3>, std::array<int, 500>&>::
"!std::is_constructible<gsl::span<int, 3>, std::array<int, 500>&>");
static_assert(!std::is_constructible<gsl::span<int, 3>, const std::array<int, 3>&>::value,
"!std::is_constructible<gsl::span<int, 3>, const std::array<int, 3>&>");
static_assert(!std::is_constructible<gsl::span<int, 3>, const gsl::span<int>&>::value,
"!std::is_constructible<gsl::span<int, 3>, const gsl::span<int>&>");
static_assert(!std::is_constructible<gsl::span<int, 3>, const gsl::span<int, 500>&>::value,
"!std::is_constructible<gsl::span<int, 3>, const gsl::span<int, 500>&>");
static_assert(!std::is_constructible<gsl::span<int, 3>, const gsl::span<const int>&>::value,
@@ -866,12 +864,8 @@ static_assert(!std::is_constructible<gsl::span<const int>, std::array<double, 3>
static_assert(!std::is_constructible<gsl::span<const int>, const gsl::span<double, 3>&>::value,
"!std::is_constructible<gsl::span<const int>, const gsl::span<double, 3>&>");
static_assert(!std::is_constructible<gsl::span<const int, 3>, const gsl::span<int>&>::value,
"!std::is_constructible<gsl::span<const int, 3>, const gsl::span<int>&>");
static_assert(!std::is_constructible<gsl::span<const int, 3>, const gsl::span<int, 500>&>::value,
"!std::is_constructible<gsl::span<const int, 3>, const gsl::span<int, 500>&>");
static_assert(!std::is_constructible<gsl::span<const int, 3>, const gsl::span<const int>&>::value,
"!std::is_constructible<gsl::span<const int, 3>, const gsl::span<const int>&>");
static_assert(
!std::is_constructible<gsl::span<const int, 3>, const gsl::span<const int, 500>&>::value,
"!std::is_constructible<gsl::span<const int, 3>, const gsl::span<const int, 500>&>");
@@ -925,6 +919,14 @@ static_assert(!std::is_constructible<gsl::span<const Derived>, std::array<Base,
static_assert(!std::is_constructible<gsl::span<const Derived>, const std::array<Base, 3>&>::value,
"!std::is_constructible<gsl::span<const Derived>, const std::array<Base, 3>&>");
// Explicit construction enabled in P1976R2
static_assert(std::is_constructible<gsl::span<int, 3>, const gsl::span<int>&>::value,
"std::is_constructible<gsl::span<int, 3>, const gsl::span<int>&>");
static_assert(std::is_constructible<gsl::span<const int, 3>, const gsl::span<int>&>::value,
"std::is_constructible<gsl::span<const int, 3>, const gsl::span<int>&>");
static_assert(std::is_constructible<gsl::span<const int, 3>, const gsl::span<const int>&>::value,
"std::is_constructible<gsl::span<const int, 3>, const gsl::span<const int>&>");
// no throw copy constructor
static_assert(std::is_nothrow_copy_constructible<gsl::span<int>>::value,
"std::is_nothrow_copy_constructible<gsl::span<int>>");
tests/span_ext_tests.cpp
+1 -1
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@@ -320,7 +320,7 @@ TEST(span_ext_test, make_span_from_array_constructor)
{
int arr[] = {1, 2, 3};
span<int> s1 = {&arr[0], 2}; // shorter
span<int> s1 = span<int>(&arr[0], 2); // shorter
span<int> s2 = arr; // longer
EXPECT_TRUE(s1 != s2);
tests/span_tests.cpp
+3 -3
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@@ -157,7 +157,7 @@ TEST(span_test, from_pointer_length_constructor)
for (int i = 0; i < 4; ++i)
{
{
span<int> s = {&arr[0], narrow_cast<std::size_t>(i)};
span<int> s = span<int>(&arr[0], narrow_cast<std::size_t>(i));
EXPECT_TRUE(s.size() == narrow_cast<std::size_t>(i));
EXPECT_TRUE(s.data() == &arr[0]);
EXPECT_TRUE(s.empty() == (i == 0));
@@ -165,7 +165,7 @@ TEST(span_test, from_pointer_length_constructor)
EXPECT_TRUE(arr[j] == s[narrow_cast<std::size_t>(j)]);
}
{
span<int> s = {&arr[i], 4 - narrow_cast<std::size_t>(i)};
span<int> s = span<int>(&arr[i], 4 - narrow_cast<std::size_t>(i));
EXPECT_TRUE(s.size() == 4 - narrow_cast<std::size_t>(i));
EXPECT_TRUE(s.data() == &arr[i]);
EXPECT_TRUE(s.empty() == ((4 - i) == 0));
@@ -678,7 +678,7 @@ TEST(span_test, from_array_constructor)
s2 = s1;
EXPECT_TRUE(s2.empty());
auto get_temp_span = [&]() -> span<int> { return {&arr[1], 2}; };
auto get_temp_span = [&]() -> span<int> { return span<int>(&arr[1], 2); };
auto use_span = [&](span<const int> s) {
EXPECT_TRUE(s.size() == 2);
EXPECT_TRUE(s.data() == &arr[1]);
tests/string_span_tests.cpp
+1218 -1217
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