1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
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
10#ifndef _LIBCPP_EXPECTED
11#define _LIBCPP_EXPECTED
12
13/*
14 Header <expected> synopsis
15
16namespace std {
17 // [expected.unexpected], class template unexpected
18 template<class E> class unexpected;
19
20 // [expected.bad], class template bad_expected_access
21 template<class E> class bad_expected_access;
22
23 // [expected.bad.void], specialization for void
24 template<> class bad_expected_access<void>;
25
26 // in-place construction of unexpected values
27 struct unexpect_t {
28 explicit unexpect_t() = default;
29 };
30 inline constexpr unexpect_t unexpect{};
31
32 // [expected.expected], class template expected
33 template<class T, class E> class expected;
34
35 // [expected.void], partial specialization of expected for void types
36 template<class T, class E> requires is_void_v<T> class expected<T, E>;
37}
38
39*/
40
41#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
42# include <__cxx03/__config>
43#else
44# include <__config>
45
46# if _LIBCPP_STD_VER >= 23
47# include <__expected/bad_expected_access.h>
48# include <__expected/expected.h>
49# include <__expected/unexpect.h>
50# include <__expected/unexpected.h>
51# endif
52
53# include <version>
54
55# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
56# pragma GCC system_header
57# endif
58#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
59
60#endif // _LIBCPP_EXPECTED
61