You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
1.5 KiB
C++
63 lines
1.5 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// <string>
|
|
|
|
// const charT& front() const;
|
|
// charT& front();
|
|
|
|
#ifdef _LIBCPP_DEBUG
|
|
#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
|
|
#endif
|
|
|
|
#include <string>
|
|
#include <cassert>
|
|
|
|
#include "test_macros.h"
|
|
#include "min_allocator.h"
|
|
|
|
template <class S>
|
|
void
|
|
test(S s)
|
|
{
|
|
const S& cs = s;
|
|
ASSERT_SAME_TYPE(decltype( s.front()), typename S::reference);
|
|
ASSERT_SAME_TYPE(decltype(cs.front()), typename S::const_reference);
|
|
LIBCPP_ASSERT_NOEXCEPT( s.front());
|
|
LIBCPP_ASSERT_NOEXCEPT( cs.front());
|
|
assert(&cs.front() == &cs[0]);
|
|
assert(&s.front() == &s[0]);
|
|
s.front() = typename S::value_type('z');
|
|
assert(s.front() == typename S::value_type('z'));
|
|
}
|
|
|
|
int main(int, char**)
|
|
{
|
|
{
|
|
typedef std::string S;
|
|
test(S("1"));
|
|
test(S("1234567890123456789012345678901234567890"));
|
|
}
|
|
#if TEST_STD_VER >= 11
|
|
{
|
|
typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
|
|
test(S("1"));
|
|
test(S("1234567890123456789012345678901234567890"));
|
|
}
|
|
#endif
|
|
#ifdef _LIBCPP_DEBUG
|
|
{
|
|
std::string s;
|
|
(void) s.front();
|
|
assert(false);
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|