164b297099
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@210659 91177308-0d34-0410-b5e6-96231b3b80d8
84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <string_view>
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// constexpr size_type rfind(charT c, size_type pos = npos) const;
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#include <experimental/string_view>
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#include <cassert>
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#include "constexpr_char_traits.hpp"
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template <class S>
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void
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test(const S& s, typename S::value_type c, typename S::size_type pos,
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typename S::size_type x)
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{
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assert(s.rfind(c, pos) == x);
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if (x != S::npos)
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assert(x <= pos && x + 1 <= s.size());
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}
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template <class S>
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void
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test(const S& s, typename S::value_type c, typename S::size_type x)
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{
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assert(s.rfind(c) == x);
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if (x != S::npos)
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assert(x + 1 <= s.size());
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}
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int main()
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{
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{
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typedef std::experimental::string_view S;
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test(S(""), 'b', 0, S::npos);
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test(S(""), 'b', 1, S::npos);
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test(S("abcde"), 'b', 0, S::npos);
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test(S("abcde"), 'b', 1, 1);
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test(S("abcde"), 'b', 2, 1);
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test(S("abcde"), 'b', 4, 1);
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test(S("abcde"), 'b', 5, 1);
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test(S("abcde"), 'b', 6, 1);
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test(S("abcdeabcde"), 'b', 0, S::npos);
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test(S("abcdeabcde"), 'b', 1, 1);
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test(S("abcdeabcde"), 'b', 5, 1);
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test(S("abcdeabcde"), 'b', 9, 6);
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test(S("abcdeabcde"), 'b', 10, 6);
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test(S("abcdeabcde"), 'b', 11, 6);
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test(S("abcdeabcdeabcdeabcde"), 'b', 0, S::npos);
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test(S("abcdeabcdeabcdeabcde"), 'b', 1, 1);
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test(S("abcdeabcdeabcdeabcde"), 'b', 10, 6);
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test(S("abcdeabcdeabcdeabcde"), 'b', 19, 16);
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test(S("abcdeabcdeabcdeabcde"), 'b', 20, 16);
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test(S("abcdeabcdeabcdeabcde"), 'b', 21, 16);
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test(S(""), 'b', S::npos);
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test(S("abcde"), 'b', 1);
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test(S("abcdeabcde"), 'b', 6);
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test(S("abcdeabcdeabcdeabcde"), 'b', 16);
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}
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#if _LIBCPP_STD_VER > 11
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{
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typedef std::experimental::basic_string_view<char, constexpr_char_traits<char>> SV;
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constexpr SV sv1;
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constexpr SV sv2 { "abcde", 5 };
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static_assert (sv1.rfind( 'b', 0 ) == SV::npos, "" );
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static_assert (sv1.rfind( 'b', 1 ) == SV::npos, "" );
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static_assert (sv2.rfind( 'b', 0 ) == SV::npos, "" );
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static_assert (sv2.rfind( 'b', 1 ) == 1, "" );
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static_assert (sv2.rfind( 'b', 2 ) == 1, "" );
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static_assert (sv2.rfind( 'b', 3 ) == 1, "" );
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static_assert (sv2.rfind( 'b', 4 ) == 1, "" );
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}
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#endif
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}
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