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73 lines
3.5 KiB
73 lines
3.5 KiB
4 months ago
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// -*- C++ -*-
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//===------------------------------ span ---------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===---------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
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// <span>
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// template<size_t N>
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// constexpr span(element_type (&arr)[N]) noexcept;
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// template<size_t N>
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// constexpr span(array<value_type, N>& arr) noexcept;
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// template<size_t N>
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// constexpr span(const array<value_type, N>& arr) noexcept;
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//
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// Remarks: These constructors shall not participate in overload resolution unless:
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// — extent == dynamic_extent || N == extent is true, and
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// — remove_pointer_t<decltype(data(arr))>(*)[] is convertible to ElementType(*)[].
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//
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#include <span>
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#include <cassert>
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#include <string>
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#include "test_macros.h"
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int arr[] = {1,2,3};
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const int carr[] = {4,5,6};
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volatile int varr[] = {7,8,9};
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const volatile int cvarr[] = {1,3,5};
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int main ()
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{
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// Size wrong
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{
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std::span<int, 2> s1(arr); // expected-error {{no matching constructor for initialization of 'std::span<int, 2>'}}
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}
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// Type wrong
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{
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std::span<float> s1(arr); // expected-error {{no matching constructor for initialization of 'std::span<float>'}}
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std::span<float, 3> s2(arr); // expected-error {{no matching constructor for initialization of 'std::span<float, 3>'}}
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}
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// CV wrong (dynamically sized)
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{
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std::span< int> s1{ carr}; // expected-error {{no matching constructor for initialization of 'std::span<int>'}}
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std::span< int> s2{ varr}; // expected-error {{no matching constructor for initialization of 'std::span<int>'}}
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std::span< int> s3{cvarr}; // expected-error {{no matching constructor for initialization of 'std::span<int>'}}
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std::span<const int> s4{ varr}; // expected-error {{no matching constructor for initialization of 'std::span<const int>'}}
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std::span<const int> s5{cvarr}; // expected-error {{no matching constructor for initialization of 'std::span<const int>'}}
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std::span< volatile int> s6{ carr}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int>'}}
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std::span< volatile int> s7{cvarr}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int>'}}
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}
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// CV wrong (statically sized)
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{
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std::span< int,3> s1{ carr}; // expected-error {{no matching constructor for initialization of 'std::span<int, 3>'}}
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std::span< int,3> s2{ varr}; // expected-error {{no matching constructor for initialization of 'std::span<int, 3>'}}
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std::span< int,3> s3{cvarr}; // expected-error {{no matching constructor for initialization of 'std::span<int, 3>'}}
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std::span<const int,3> s4{ varr}; // expected-error {{no matching constructor for initialization of 'std::span<const int, 3>'}}
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std::span<const int,3> s5{cvarr}; // expected-error {{no matching constructor for initialization of 'std::span<const int, 3>'}}
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std::span< volatile int,3> s6{ carr}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int, 3>'}}
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std::span< volatile int,3> s7{cvarr}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int, 3>'}}
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}
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}
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