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 // UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
10
11 // <string_view>
12
13 // constexpr size_type find(charT c, size_type pos = 0) const;
14
15 #include <string_view>
16 #include <cassert>
17
18 #include "test_macros.h"
19 #include "constexpr_char_traits.h"
20
21 template <class S>
test(const S & s,typename S::value_type c,typename S::size_type pos,typename S::size_type x)22 void test(const S& s, typename S::value_type c, typename S::size_type pos, typename S::size_type x) {
23 LIBCPP_ASSERT_NOEXCEPT(s.find(c, pos));
24 assert(s.find(c, pos) == x);
25 if (x != S::npos)
26 assert(pos <= x && x + 1 <= s.size());
27 }
28
29 template <class S>
test(const S & s,typename S::value_type c,typename S::size_type x)30 void test(const S& s, typename S::value_type c, typename S::size_type x) {
31 assert(s.find(c) == x);
32 if (x != S::npos)
33 assert(0 <= x && x + 1 <= s.size());
34 }
35
main(int,char **)36 int main(int, char**) {
37 {
38 typedef std::string_view S;
39 test(S(""), 'c', 0, S::npos);
40 test(S(""), 'c', 1, S::npos);
41 test(S("abcde"), 'c', 0, 2);
42 test(S("abcde"), 'c', 1, 2);
43 test(S("abcde"), 'c', 2, 2);
44 test(S("abcde"), 'c', 4, S::npos);
45 test(S("abcde"), 'c', 5, S::npos);
46 test(S("abcde"), 'c', 6, S::npos);
47 test(S("abcdeabcde"), 'c', 0, 2);
48 test(S("abcdeabcde"), 'c', 1, 2);
49 test(S("abcdeabcde"), 'c', 5, 7);
50 test(S("abcdeabcde"), 'c', 9, S::npos);
51 test(S("abcdeabcde"), 'c', 10, S::npos);
52 test(S("abcdeabcde"), 'c', 11, S::npos);
53 test(S("abcdeabcdeabcdeabcde"), 'c', 0, 2);
54 test(S("abcdeabcdeabcdeabcde"), 'c', 1, 2);
55 test(S("abcdeabcdeabcdeabcde"), 'c', 10, 12);
56 test(S("abcdeabcdeabcdeabcde"), 'c', 19, S::npos);
57 test(S("abcdeabcdeabcdeabcde"), 'c', 20, S::npos);
58 test(S("abcdeabcdeabcdeabcde"), 'c', 21, S::npos);
59
60 test(S(""), 'c', S::npos);
61 test(S("abcde"), 'c', 2);
62 test(S("abcdeabcde"), 'c', 2);
63 test(S("abcdeabcdeabcdeabcde"), 'c', 2);
64 }
65
66 #if TEST_STD_VER > 11
67 {
68 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
69 constexpr SV sv1;
70 constexpr SV sv2{"abcde", 5};
71
72 static_assert(sv1.find('c', 0) == SV::npos, "");
73 static_assert(sv1.find('c', 1) == SV::npos, "");
74 static_assert(sv2.find('c', 0) == 2, "");
75 static_assert(sv2.find('c', 1) == 2, "");
76 static_assert(sv2.find('c', 2) == 2, "");
77 static_assert(sv2.find('c', 3) == SV::npos, "");
78 static_assert(sv2.find('c', 4) == SV::npos, "");
79 }
80 #endif
81
82 return 0;
83 }
84