libcxx/test/std/strings/string.view/char.bad.fail.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <string_view>
  10 //   ... manipulating sequences of any non-array trivial standard-layout types.
  11
  12 #include <string>
  13 #include "../basic.string/test_traits.h"
  14
  15 struct NotTrivial {
  16     NotTrivial() : value(3) {}
  17     int value;
  18 };
  19
  20 struct NotStandardLayout {
  21 public:
  22     NotStandardLayout() : one(1), two(2) {}
  23     int sum() const { return one + two; } // silences "unused field 'two' warning"
  24     int one;
  25 private:
  26     int two;
  27 };
  28
  29 int main(int, char**)
  30 {
  31     {
  32 //  array
  33     typedef char C[3];
  34     static_assert(std::is_array<C>::value, "");
  35     std::basic_string_view<C, test_traits<C> > sv;
  36 //  expected-error-re@string_view:* {{static_assert failed{{.*}} "Character type of basic_string_view must not be an array"}}
  37     }
  38
  39     {
  40 //  not trivial
  41     static_assert(!std::is_trivial<NotTrivial>::value, "");
  42     std::basic_string_view<NotTrivial, test_traits<NotTrivial> > sv;
  43 //  expected-error-re@string_view:* {{static_assert failed{{.*}} "Character type of basic_string_view must be trivial"}}
  44     }
  45
  46     {
  47 //  not standard layout
  48     static_assert(!std::is_standard_layout<NotStandardLayout>::value, "");
  49     std::basic_string_view<NotStandardLayout, test_traits<NotStandardLayout> > sv;
  50 //  expected-error-re@string_view:* {{static_assert failed{{.*}} "Character type of basic_string_view must be standard-layout"}}
  51     }
  52
  53   return 0;
  54 }