forked from OSchip/llvm-project
65 lines
3.4 KiB
C++
65 lines
3.4 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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// constexpr span(pointer first, pointer last);
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// Requires: [first, last) shall be a valid range.
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// If extent is not equal to dynamic_extent, then last - first shall be equal to extent.
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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(int, char**)
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{
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// We can't check that the size doesn't match - because that's a runtime property
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// std::span<int, 2> s1(arr, arr + 3);
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// Type wrong
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{
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std::span<float> s1(arr, arr + 3); // expected-error {{no matching constructor for initialization of 'std::span<float>'}}
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std::span<float, 3> s2(arr, arr + 3); // 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, carr + 3}; // expected-error {{no matching constructor for initialization of 'std::span<int>'}}
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std::span< int> s2{ varr, varr + 3}; // expected-error {{no matching constructor for initialization of 'std::span<int>'}}
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std::span< int> s3{cvarr, cvarr + 3}; // expected-error {{no matching constructor for initialization of 'std::span<int>'}}
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std::span<const int> s4{ varr, varr + 3}; // expected-error {{no matching constructor for initialization of 'std::span<const int>'}}
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std::span<const int> s5{cvarr, cvarr + 3}; // expected-error {{no matching constructor for initialization of 'std::span<const int>'}}
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std::span< volatile int> s6{ carr, carr + 3}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int>'}}
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std::span< volatile int> s7{cvarr, cvarr + 3}; // 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, carr + 3}; // expected-error {{no matching constructor for initialization of 'std::span<int, 3>'}}
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std::span< int,3> s2{ varr, varr + 3}; // expected-error {{no matching constructor for initialization of 'std::span<int, 3>'}}
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std::span< int,3> s3{cvarr, cvarr + 3}; // expected-error {{no matching constructor for initialization of 'std::span<int, 3>'}}
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std::span<const int,3> s4{ varr, varr + 3}; // expected-error {{no matching constructor for initialization of 'std::span<const int, 3>'}}
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std::span<const int,3> s5{cvarr, cvarr + 3}; // expected-error {{no matching constructor for initialization of 'std::span<const int, 3>'}}
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std::span< volatile int,3> s6{ carr, carr + 3}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int, 3>'}}
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std::span< volatile int,3> s7{cvarr, cvarr + 3}; // expected-error {{no matching constructor for initialization of 'std::span<volatile int, 3>'}}
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}
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return 0;
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}
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