89 lines
2.1 KiB
C++
89 lines
2.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <string>
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// const charT* data() const; // constexpr since C++20
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// charT* data(); // C++17, constexpr since C++20
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#include <string>
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#include <cassert>
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#include "test_macros.h"
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#include "min_allocator.h"
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template <class S>
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TEST_CONSTEXPR_CXX20 void
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test_const(const S& s)
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{
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typedef typename S::traits_type T;
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const typename S::value_type* str = s.data();
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if (s.size() > 0)
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{
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assert(T::compare(str, &s[0], s.size()) == 0);
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assert(T::eq(str[s.size()], typename S::value_type()));
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}
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else
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assert(T::eq(str[0], typename S::value_type()));
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}
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template <class S>
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TEST_CONSTEXPR_CXX20 void
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test_nonconst(S& s)
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{
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typedef typename S::traits_type T;
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typename S::value_type* str = s.data();
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if (s.size() > 0)
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{
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assert(T::compare(str, &s[0], s.size()) == 0);
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assert(T::eq(str[s.size()], typename S::value_type()));
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}
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else
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assert(T::eq(str[0], typename S::value_type()));
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}
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TEST_CONSTEXPR_CXX20 bool test() {
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{
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typedef std::string S;
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test_const(S(""));
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test_const(S("abcde"));
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test_const(S("abcdefghij"));
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test_const(S("abcdefghijklmnopqrst"));
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}
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#if TEST_STD_VER >= 11
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{
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typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
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test_const(S(""));
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test_const(S("abcde"));
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test_const(S("abcdefghij"));
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test_const(S("abcdefghijklmnopqrst"));
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}
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#endif
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#if TEST_STD_VER > 14
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{
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typedef std::string S;
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S s1(""); test_nonconst(s1);
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S s2("abcde"); test_nonconst(s2);
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S s3("abcdefghij"); test_nonconst(s3);
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S s4("abcdefghijklmnopqrst"); test_nonconst(s4);
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}
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#endif
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return true;
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}
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int main(int, char**)
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{
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test();
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#if TEST_STD_VER > 17
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static_assert(test());
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#endif
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return 0;
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}
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