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 // Note: libc++ supports string_view before C++17, but literals were introduced in C++14
10 // UNSUPPORTED: c++03, c++11
11 // UNSUPPORTED: !stdlib=libc++ && c++14
12
13 #include <string_view>
14 #include <cassert>
15
16 #include "test_macros.h"
17
18 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
19 typedef std::u8string_view u8string_view;
20 #else
21 typedef std::string_view u8string_view;
22 #endif
23
main(int,char **)24 int main(int, char**) {
25 {
26 using namespace std::literals::string_view_literals;
27
28 ASSERT_SAME_TYPE(decltype( "Hi"sv), std::string_view);
29 ASSERT_SAME_TYPE(decltype(u8"Hi"sv), u8string_view);
30 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
31 ASSERT_SAME_TYPE(decltype( L"Hi"sv), std::wstring_view);
32 #endif
33 ASSERT_SAME_TYPE(decltype( u"Hi"sv), std::u16string_view);
34 ASSERT_SAME_TYPE(decltype( U"Hi"sv), std::u32string_view);
35
36 std::string_view foo;
37 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
38 std::wstring_view Lfoo;
39 #endif
40 u8string_view u8foo;
41 std::u16string_view ufoo;
42 std::u32string_view Ufoo;
43
44 foo = ""sv; assert( foo.size() == 0);
45 u8foo = u8""sv; assert(u8foo.size() == 0);
46 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
47 Lfoo = L""sv; assert( Lfoo.size() == 0);
48 #endif
49 ufoo = u""sv; assert( ufoo.size() == 0);
50 Ufoo = U""sv; assert( Ufoo.size() == 0);
51
52 foo = " "sv; assert( foo.size() == 1);
53 u8foo = u8" "sv; assert(u8foo.size() == 1);
54 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
55 Lfoo = L" "sv; assert( Lfoo.size() == 1);
56 #endif
57 ufoo = u" "sv; assert( ufoo.size() == 1);
58 Ufoo = U" "sv; assert( Ufoo.size() == 1);
59
60 foo = "ABC"sv; assert( foo == "ABC"); assert( foo == std::string_view ( "ABC"));
61 u8foo = u8"ABC"sv; assert(u8foo == u8"ABC"); assert(u8foo == u8string_view (u8"ABC"));
62 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
63 Lfoo = L"ABC"sv; assert( Lfoo == L"ABC"); assert( Lfoo == std::wstring_view ( L"ABC"));
64 #endif
65 ufoo = u"ABC"sv; assert( ufoo == u"ABC"); assert( ufoo == std::u16string_view( u"ABC"));
66 Ufoo = U"ABC"sv; assert( Ufoo == U"ABC"); assert( Ufoo == std::u32string_view( U"ABC"));
67
68 static_assert( "ABC"sv.size() == 3, "");
69 static_assert(u8"ABC"sv.size() == 3, "");
70 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
71 static_assert( L"ABC"sv.size() == 3, "");
72 #endif
73 static_assert( u"ABC"sv.size() == 3, "");
74 static_assert( U"ABC"sv.size() == 3, "");
75
76 ASSERT_NOEXCEPT( "ABC"sv);
77 ASSERT_NOEXCEPT(u8"ABC"sv);
78 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
79 ASSERT_NOEXCEPT( L"ABC"sv);
80 #endif
81 ASSERT_NOEXCEPT( u"ABC"sv);
82 ASSERT_NOEXCEPT( U"ABC"sv);
83 }
84 {
85 using namespace std::literals;
86 std::string_view foo = ""sv;
87 assert(foo.length() == 0);
88 }
89 {
90 using namespace std;
91 std::string_view foo = ""sv;
92 assert(foo.length() == 0);
93 }
94
95 return 0;
96 }
97