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Implement std::string_view as described in http://wg21.link/P0254R1. Reviewed as https://reviews.llvm.org/D21459

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@276238 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Marshall Clow
2016-07-21 05:31:24 +00:00
parent f50841f3ac
commit 1e00d6db31
100 changed files with 19172 additions and 731 deletions
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71
test/std/strings/string.view/string.view.comparison/opgt.string_view.pointer.pass.cpp Normal file
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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <string>
// constexpr template<class charT, class traits, class Allocator>
// bool operator>(const charT* lhs, basic_string_wiew<charT,traits> rhs);
// constexpr template<class charT, class traits, class Allocator>
// bool operator>(basic_string_wiew<charT,traits> lhs, const charT* rhs);
#include <string_view>
#include <cassert>
#include "constexpr_char_traits.hpp"
template <class S>
void
test(const typename S::value_type* lhs, const S& rhs, bool x, bool y)
{
assert((lhs > rhs) == x);
assert((rhs > lhs) == y);
}
int main()
{
{
typedef std::string_view S;
test("", S(""), false, false);
test("", S("abcde"), false, true);
test("", S("abcdefghij"), false, true);
test("", S("abcdefghijklmnopqrst"), false, true);
test("abcde", S(""), true, false);
test("abcde", S("abcde"), false, false);
test("abcde", S("abcdefghij"), false, true);
test("abcde", S("abcdefghijklmnopqrst"), false, true);
test("abcdefghij", S(""), true, false);
test("abcdefghij", S("abcde"), true, false);
test("abcdefghij", S("abcdefghij"), false, false);
test("abcdefghij", S("abcdefghijklmnopqrst"), false, true);
test("abcdefghijklmnopqrst", S(""), true, false);
test("abcdefghijklmnopqrst", S("abcde"), true, false);
test("abcdefghijklmnopqrst", S("abcdefghij"), true, false);
test("abcdefghijklmnopqrst", S("abcdefghijklmnopqrst"), false, false);
}
#if _LIBCPP_STD_VER > 11
{
typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
constexpr SV sv1;
constexpr SV sv2 { "abcde", 5 };
static_assert (!(sv1 > ""), "" );
static_assert (!("" > sv1), "" );
static_assert (!(sv1 > "abcde"), "" );
static_assert ( "abcde" > sv1, "" );
static_assert ( sv2 > "", "" );
static_assert (!("" > sv2), "" );
static_assert (!(sv2 > "abcde"), "" );
static_assert (!("abcde" > sv2), "" );
static_assert (!(sv2 > "abcde0"), "" );
static_assert ( "abcde0" > sv2, "" );
}
#endif
}