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// -*- C++ -*-
//===------------------------------ span ---------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===---------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// <span>
// template<size_t N>
// constexpr span(element_type (&arr)[N]) noexcept;
// template<size_t N>
// constexpr span(array<value_type, N>& arr) noexcept;
// template<size_t N>
// constexpr span(const array<value_type, N>& arr) noexcept;
//
// Remarks: These constructors shall not participate in overload resolution unless:
// — extent == dynamic_extent || N == extent is true, and
// — remove_pointer_t<decltype(data(arr))>(*)[] is convertible to ElementType(*)[].
//
#include <span>
#include <cassert>
#include <string>
#include "test_macros.h"
int arr[] = {1,2,3};
const int carr[] = {4,5,6};
volatile int varr[] = {7,8,9};
const volatile int cvarr[] = {1,3,5};
int main(int, char**)
{
// Size wrong
{
std::span<int, 2> s1(arr); // expected-error {{no matching constructor for initialization of 'std::span<int, 2>'}}
}
// Type wrong
{
std::span<float> s1(arr); // expected-error {{no matching constructor for initialization of 'std::span<float>'}}
std::span<float, 3> s2(arr); // expected-error {{no matching constructor for initialization of 'std::span<float, 3>'}}
}
// CV wrong (dynamically sized)
{
std::span< int> s1{ carr}; // expected-error {{no matching constructor for initialization of 'std::span<int>'}}
std::span< int> s2{ varr}; // expected-error {{no matching constructor for initialization of 'std::span<int>'}}
std::span< int> s3{cvarr}; // expected-error {{no matching constructor for initialization of 'std::span<int>'}}
std::span<const int> s4{ varr}; // expected-error {{no matching constructor for initialization of 'std::span<const int>'}}
std::span<const int> s5{cvarr}; // expected-error {{no matching constructor for initialization of 'std::span<const int>'}}
std::span< volatile int> s6{ carr}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int>'}}
std::span< volatile int> s7{cvarr}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int>'}}
}
// CV wrong (statically sized)
{
std::span< int,3> s1{ carr}; // expected-error {{no matching constructor for initialization of 'std::span<int, 3>'}}
std::span< int,3> s2{ varr}; // expected-error {{no matching constructor for initialization of 'std::span<int, 3>'}}
std::span< int,3> s3{cvarr}; // expected-error {{no matching constructor for initialization of 'std::span<int, 3>'}}
std::span<const int,3> s4{ varr}; // expected-error {{no matching constructor for initialization of 'std::span<const int, 3>'}}
std::span<const int,3> s5{cvarr}; // expected-error {{no matching constructor for initialization of 'std::span<const int, 3>'}}
std::span< volatile int,3> s6{ carr}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int, 3>'}}
std::span< volatile int,3> s7{cvarr}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int, 3>'}}
}
return 0;
}
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