forked from OSchip/llvm-project
106 lines
5.8 KiB
C++
106 lines
5.8 KiB
C++
// -*- C++ -*-
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//===------------------------------ span ---------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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<class OtherElementType, size_t OtherExtent>
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// constexpr span(const span<OtherElementType, OtherExtent>& s) noexcept;
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//
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// Remarks: This constructor shall not participate in overload resolution unless:
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// Extent == dynamic_extent || Extent == OtherExtent is true, and
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// OtherElementType(*)[] is convertible to ElementType(*)[].
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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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void checkCV ()
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{
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// std::span< int> sp;
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std::span<const int> csp;
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std::span< volatile int> vsp;
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std::span<const volatile int> cvsp;
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// std::span< int, 0> sp0;
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std::span<const int, 0> csp0;
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std::span< volatile int, 0> vsp0;
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std::span<const volatile int, 0> cvsp0;
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// Try to remove const and/or volatile (dynamic -> dynamic)
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{
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std::span< int> s1{ csp}; // expected-error {{no matching constructor for initialization of 'std::span<int>'}}
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std::span< int> s2{ vsp}; // expected-error {{no matching constructor for initialization of 'std::span<int>'}}
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std::span< int> s3{cvsp}; // expected-error {{no matching constructor for initialization of 'std::span<int>'}}
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std::span<const int> s4{ vsp}; // expected-error {{no matching constructor for initialization of 'std::span<const int>'}}
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std::span<const int> s5{cvsp}; // expected-error {{no matching constructor for initialization of 'std::span<const int>'}}
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std::span< volatile int> s6{ csp}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int>'}}
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std::span< volatile int> s7{cvsp}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int>'}}
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}
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// Try to remove const and/or volatile (static -> static)
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{
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std::span< int, 0> s1{ csp0}; // expected-error {{no matching constructor for initialization of 'std::span<int, 0>'}}
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std::span< int, 0> s2{ vsp0}; // expected-error {{no matching constructor for initialization of 'std::span<int, 0>'}}
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std::span< int, 0> s3{cvsp0}; // expected-error {{no matching constructor for initialization of 'std::span<int, 0>'}}
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std::span<const int, 0> s4{ vsp0}; // expected-error {{no matching constructor for initialization of 'std::span<const int, 0>'}}
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std::span<const int, 0> s5{cvsp0}; // expected-error {{no matching constructor for initialization of 'std::span<const int, 0>'}}
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std::span< volatile int, 0> s6{ csp0}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int, 0>'}}
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std::span< volatile int, 0> s7{cvsp0}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int, 0>'}}
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}
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// Try to remove const and/or volatile (static -> dynamic)
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{
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std::span< int> s1{ csp0}; // expected-error {{no matching constructor for initialization of 'std::span<int>'}}
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std::span< int> s2{ vsp0}; // expected-error {{no matching constructor for initialization of 'std::span<int>'}}
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std::span< int> s3{cvsp0}; // expected-error {{no matching constructor for initialization of 'std::span<int>'}}
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std::span<const int> s4{ vsp0}; // expected-error {{no matching constructor for initialization of 'std::span<const int>'}}
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std::span<const int> s5{cvsp0}; // expected-error {{no matching constructor for initialization of 'std::span<const int>'}}
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std::span< volatile int> s6{ csp0}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int>'}}
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std::span< volatile int> s7{cvsp0}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int>'}}
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}
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// Try to remove const and/or volatile (static -> static)
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{
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std::span< int, 0> s1{ csp}; // expected-error {{no matching constructor for initialization of 'std::span<int, 0>'}}
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std::span< int, 0> s2{ vsp}; // expected-error {{no matching constructor for initialization of 'std::span<int, 0>'}}
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std::span< int, 0> s3{cvsp}; // expected-error {{no matching constructor for initialization of 'std::span<int, 0>'}}
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std::span<const int, 0> s4{ vsp}; // expected-error {{no matching constructor for initialization of 'std::span<const int, 0>'}}
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std::span<const int, 0> s5{cvsp}; // expected-error {{no matching constructor for initialization of 'std::span<const int, 0>'}}
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std::span< volatile int, 0> s6{ csp}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int, 0>'}}
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std::span< volatile int, 0> s7{cvsp}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int, 0>'}}
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}
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}
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int main(int, char**)
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{
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std::span<int> sp;
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std::span<int, 0> sp0;
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std::span<float> s1{sp}; // expected-error {{no matching constructor for initialization of 'std::span<float>'}}
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std::span<float> s2{sp0}; // expected-error {{no matching constructor for initialization of 'std::span<float>'}}
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std::span<float, 0> s3{sp}; // expected-error {{no matching constructor for initialization of 'std::span<float, 0>'}}
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std::span<float, 0> s4{sp0}; // expected-error {{no matching constructor for initialization of 'std::span<float, 0>'}}
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checkCV();
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return 0;
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}
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