libcxx/test/std/containers/views/span.objectrep/as_writable_bytes.fail.cpp

   1 // -*- C++ -*-
   2 //===------------------------------ span ---------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===---------------------------------------------------------------------===//
   9 // UNSUPPORTED: c++03, c++11, c++14, c++17
  10
  11 // <span>
  12
  13 // template <class ElementType, size_t Extent>
  14 //     span<byte,
  15 //          Extent == dynamic_extent
  16 //              ? dynamic_extent
  17 //              : sizeof(ElementType) * Extent>
  18 //     as_writable_bytes(span<ElementType, Extent> s) noexcept;
  19
  20
  21 #include <span>
  22 #include <cassert>
  23 #include <string>
  24
  25 #include "test_macros.h"
  26
  27 const int iArr2[] = { 0,  1,  2,  3,  4,  5,  6,  7,  8,  9};
  28
  29 struct A {};
  30
  31 int main(int, char**)
  32 {
  33     std::as_writable_bytes(std::span<const int>());            // expected-error {{no matching function for call to 'as_writable_bytes'}}
  34     std::as_writable_bytes(std::span<const long>());           // expected-error {{no matching function for call to 'as_writable_bytes'}}
  35     std::as_writable_bytes(std::span<const double>());         // expected-error {{no matching function for call to 'as_writable_bytes'}}
  36     std::as_writable_bytes(std::span<const A>());              // expected-error {{no matching function for call to 'as_writable_bytes'}}
  37     std::as_writable_bytes(std::span<const std::string>());    // expected-error {{no matching function for call to 'as_writable_bytes'}}
  38
  39     std::as_writable_bytes(std::span<const int, 0>());         // expected-error {{no matching function for call to 'as_writable_bytes'}}
  40     std::as_writable_bytes(std::span<const long, 0>());        // expected-error {{no matching function for call to 'as_writable_bytes'}}
  41     std::as_writable_bytes(std::span<const double, 0>());      // expected-error {{no matching function for call to 'as_writable_bytes'}}
  42     std::as_writable_bytes(std::span<const A, 0>());           // expected-error {{no matching function for call to 'as_writable_bytes'}}
  43     std::as_writable_bytes(std::span<const std::string, (size_t)0>()); // expected-error {{no matching function for call to 'as_writable_bytes'}}
  44
  45     std::as_writable_bytes(std::span<const int>   (iArr2, 1));     // expected-error {{no matching function for call to 'as_writable_bytes'}}
  46     std::as_writable_bytes(std::span<const int, 1>(iArr2 + 5, 1)); // expected-error {{no matching function for call to 'as_writable_bytes'}}
  47
  48   return 0;
  49 }