75 lines · 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-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)10 11// XFAIL: FROZEN-CXX03-HEADERS-FIXME12 13// <string_view>14// ... manipulating sequences of any non-array trivial standard-layout types.15 16#include <string>17#include <type_traits>18#include "../basic.string/test_traits.h"19 20struct NotTriviallyCopyable {21 int value;22 NotTriviallyCopyable& operator=(const NotTriviallyCopyable& other) {23 value = other.value;24 return *this;25 }26};27 28struct NotTriviallyDefaultConstructible {29 NotTriviallyDefaultConstructible() : value(3) {}30 int value;31};32 33struct NotStandardLayout {34public:35 NotStandardLayout() : one(1), two(2) {}36 int sum() const { return one + two; } // silences "unused field 'two' warning"37 int one;38 39private:40 int two;41};42 43int main(int, char**) {44 {45 // array46 typedef char C[3];47 static_assert(std::is_array<C>::value, "");48 std::basic_string_view<C, test_traits<C> > sv;49 // expected-error-re@string_view:* {{static assertion failed{{.*}}Character type of basic_string_view must not be an array}}50 }51 52 {53 // not trivially copyable54 static_assert(!std::is_trivially_copyable<NotTriviallyCopyable>::value, "");55 std::basic_string_view<NotTriviallyCopyable, test_traits<NotTriviallyCopyable> > s;56 // expected-error-re@*:* {{static assertion failed{{.*}}Character type of basic_string_view must be trivially copyable}}57 }58 59 {60 // not trivially default constructible61 static_assert(!std::is_trivially_default_constructible<NotTriviallyDefaultConstructible>::value, "");62 std::basic_string_view<NotTriviallyDefaultConstructible, test_traits<NotTriviallyDefaultConstructible> > sv;63 // expected-error-re@string_view:* {{static assertion failed{{.*}}Character type of basic_string_view must be trivially default constructible}}64 }65 66 {67 // not standard layout68 static_assert(!std::is_standard_layout<NotStandardLayout>::value, "");69 std::basic_string_view<NotStandardLayout, test_traits<NotStandardLayout> > sv;70 // expected-error-re@string_view:* {{static assertion failed{{.*}}Character type of basic_string_view must be standard-layout}}71 }72 73 return 0;74}75