| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // <string> |
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| 10 | |
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| 11 | // template<class charT, class traits, class Allocator> |
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| 12 | // bool operator<(const basic_string<charT,traits,Allocator>& lhs, |
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| 13 | // const basic_string<charT,traits,Allocator>& rhs); // constexpr since C++20 |
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| 14 | |
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| 15 | #include <string> |
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| 16 | #include <cassert> |
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| 17 | |
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| 18 | #include "test_macros.h" |
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| 19 | #include "min_allocator.h" |
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| 20 | |
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| 21 | template <class S> |
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| 22 | TEST_CONSTEXPR_CXX20 void test(const S& lhs, const S& rhs, bool x) { |
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| 23 | assert((lhs < rhs) == x); |
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| 24 | } |
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| 25 | |
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| 26 | template <class S> |
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| 27 | TEST_CONSTEXPR_CXX20 void test_string() { |
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| 28 | test(S("" ), S("" ), false); |
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| 29 | test(S("" ), S("abcde" ), true); |
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| 30 | test(S("" ), S("abcdefghij" ), true); |
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| 31 | test(S("" ), S("abcdefghijklmnopqrst" ), true); |
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| 32 | test(S("abcde" ), S("" ), false); |
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| 33 | test(S("abcde" ), S("abcde" ), false); |
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| 34 | test(S("abcde" ), S("abcdefghij" ), true); |
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| 35 | test(S("abcde" ), S("abcdefghijklmnopqrst" ), true); |
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| 36 | test(S("abcdefghij" ), S("" ), false); |
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| 37 | test(S("abcdefghij" ), S("abcde" ), false); |
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| 38 | test(S("abcdefghij" ), S("abcdefghij" ), false); |
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| 39 | test(S("abcdefghij" ), S("abcdefghijklmnopqrst" ), true); |
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| 40 | test(S("abcdefghijklmnopqrst" ), S("" ), false); |
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| 41 | test(S("abcdefghijklmnopqrst" ), S("abcde" ), false); |
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| 42 | test(S("abcdefghijklmnopqrst" ), S("abcdefghij" ), false); |
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| 43 | test(S("abcdefghijklmnopqrst" ), S("abcdefghijklmnopqrst" ), false); |
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| 44 | } |
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| 45 | |
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| 46 | TEST_CONSTEXPR_CXX20 bool test() { |
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| 47 | test_string<std::string>(); |
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| 48 | #if TEST_STD_VER >= 11 |
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| 49 | test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char> > >(); |
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| 50 | #endif |
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| 51 | |
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| 52 | return true; |
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| 53 | } |
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| 54 | |
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| 55 | int main(int, char**) { |
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| 56 | test(); |
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| 57 | #if TEST_STD_VER > 17 |
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| 58 | static_assert(test()); |
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| 59 | #endif |
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| 60 | |
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| 61 | return 0; |
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| 62 | } |
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| 63 | |
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