find_char_size.pass.cpp (2568B)
1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <string_view> 11 12 // constexpr size_type find(charT c, size_type pos = 0) const; 13 14 #include <string_view> 15 #include <cassert> 16 17 #include "test_macros.h" 18 #include "constexpr_char_traits.hpp" 19 20 template <class S> 21 void 22 test(const S& s, typename S::value_type c, typename S::size_type pos, 23 typename S::size_type x) 24 { 25 assert(s.find(c, pos) == x); 26 if (x != S::npos) 27 assert(pos <= x && x + 1 <= s.size()); 28 } 29 30 template <class S> 31 void 32 test(const S& s, typename S::value_type c, typename S::size_type x) 33 { 34 assert(s.find(c) == x); 35 if (x != S::npos) 36 assert(0 <= x && x + 1 <= s.size()); 37 } 38 39 int main() 40 { 41 { 42 typedef std::string_view S; 43 test(S(""), 'c', 0, S::npos); 44 test(S(""), 'c', 1, S::npos); 45 test(S("abcde"), 'c', 0, 2); 46 test(S("abcde"), 'c', 1, 2); 47 test(S("abcde"), 'c', 2, 2); 48 test(S("abcde"), 'c', 4, S::npos); 49 test(S("abcde"), 'c', 5, S::npos); 50 test(S("abcde"), 'c', 6, S::npos); 51 test(S("abcdeabcde"), 'c', 0, 2); 52 test(S("abcdeabcde"), 'c', 1, 2); 53 test(S("abcdeabcde"), 'c', 5, 7); 54 test(S("abcdeabcde"), 'c', 9, S::npos); 55 test(S("abcdeabcde"), 'c', 10, S::npos); 56 test(S("abcdeabcde"), 'c', 11, S::npos); 57 test(S("abcdeabcdeabcdeabcde"), 'c', 0, 2); 58 test(S("abcdeabcdeabcdeabcde"), 'c', 1, 2); 59 test(S("abcdeabcdeabcdeabcde"), 'c', 10, 12); 60 test(S("abcdeabcdeabcdeabcde"), 'c', 19, S::npos); 61 test(S("abcdeabcdeabcdeabcde"), 'c', 20, S::npos); 62 test(S("abcdeabcdeabcdeabcde"), 'c', 21, S::npos); 63 64 test(S(""), 'c', S::npos); 65 test(S("abcde"), 'c', 2); 66 test(S("abcdeabcde"), 'c', 2); 67 test(S("abcdeabcdeabcdeabcde"), 'c', 2); 68 } 69 70 #if TEST_STD_VER > 11 71 { 72 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV; 73 constexpr SV sv1; 74 constexpr SV sv2 { "abcde", 5 }; 75 76 static_assert (sv1.find( 'c', 0 ) == SV::npos, "" ); 77 static_assert (sv1.find( 'c', 1 ) == SV::npos, "" ); 78 static_assert (sv2.find( 'c', 0 ) == 2, "" ); 79 static_assert (sv2.find( 'c', 1 ) == 2, "" ); 80 static_assert (sv2.find( 'c', 2 ) == 2, "" ); 81 static_assert (sv2.find( 'c', 3 ) == SV::npos, "" ); 82 static_assert (sv2.find( 'c', 4 ) == SV::npos, "" ); 83 } 84 #endif 85 }