================
@@ -5,39 +5,134 @@
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
+
// UNSUPPORTED: c++03, c++11, c++14, c++17
// <span>
-#include <span>
+// constexpr explicit(extent != dynamic_extent)
span(std::initializer_list<value_type> il); // Since C++26
+
+#include <any>
#include <cassert>
#include <cstddef>
+#include <initializer_list>
+#include <span>
+#include <type_traits>
+
+#include "test_convertible.h"
+#include "test_macros.h"
+
+#if TEST_STD_VER >= 26
+
+// SFINAE
+
+template <typename T>
+concept ConstElementType = std::is_const_v<typename T::element_type>;
+
+static_assert(ConstElementType<std::span<const int>>);
+static_assert(!ConstElementType<std::span<int>>);
+static_assert(ConstElementType<std::span<const int, 94>>);
+static_assert(!ConstElementType<std::span<int, 94>>);
+
+// Constructor constraings
+
+template <typename I, typename T, std::size_t... N>
+concept HasInitializerListCtr = requires(I il) { std::span<T, N...>{il}; };
+
+static_assert(HasInitializerListCtr<std::initializer_list<const int>, const
int>);
+static_assert(!HasInitializerListCtr<std::initializer_list<int>, int>);
+static_assert(HasInitializerListCtr<std::initializer_list<const int>, const
int, 94>);
+static_assert(!HasInitializerListCtr<std::initializer_list<int>, int, 94>);
+
+// Constructor conditionally explicit
+
+static_assert(!test_convertible<std::span<const int, 28>,
std::initializer_list<int>>(),
+ "This constructor must be explicit");
+static_assert(std::is_constructible_v<std::span<const int, 28>,
std::initializer_list<int>>);
+static_assert(test_convertible<std::span<const int>,
std::initializer_list<int>>(),
+ "This constructor must not be explicit");
+static_assert(std::is_constructible_v<std::span<const int>,
std::initializer_list<int>>);
+
+#endif
struct Sink {
- constexpr Sink() = default;
- constexpr Sink(Sink*) {}
+ constexpr Sink() = default;
+ constexpr Sink(Sink*) {}
};
-constexpr std::size_t count(std::span<const Sink> sp) {
- return sp.size();
-}
+constexpr std::size_t count(std::span<const Sink> sp) { return sp.size(); }
-template<int N>
-constexpr std::size_t countn(std::span<const Sink, N> sp) {
- return sp.size();
+template <std::size_t N>
+constexpr std::size_t count_n(std::span<const Sink, N> sp) {
+ return sp.size();
}
constexpr bool test() {
+#if TEST_STD_VER >= 26
+ // Dynamic extent
+ {
+ Sink a[10];
+
+ assert(count({a}) == 1);
+ assert(count({a, a + 10}) == 2);
+ assert(count({a, a + 1, a + 2}) == 3);
+ assert(count(std::initializer_list<Sink>{a[0], a[1], a[2], a[3]}) == 4);
+ }
+#else
+ {
Sink a[10];
+
assert(count({a}) == 10);
- assert(count({a, a+10}) == 10);
- assert(countn<10>({a}) == 10);
- return true;
+ assert(count({a, a + 10}) == 10);
+ assert(count_n<10>({a}) == 10);
+ }
+#endif
+
+ return true;
+}
+
+// Test P2447R4 "Annex C examples"
+
+constexpr int three(std::span<void* const> sp) { return sp.size(); }
+
+constexpr int four(std::span<const std::any> sp) { return sp.size(); }
+
+bool test_P2447R4_annex_c_examples() {
+ // 1. Overload resolution is affected
+ // --> tested in "initializer_list.verify.cpp"
+
+ // 2. The `initializer_list` ctor has high precedence
+ // --> tested in "initializer_list.verify.cpp"
+
+ // 3. Implicit two-argument construction with a highly convertible value_type
----------------
mordante wrote:
nice! thanks for referring to the other test too!
https://github.com/llvm/llvm-project/pull/78157
_______________________________________________
lldb-commits mailing list
lldb-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
