index.pass.cpp
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//===----------------------------------------------------------------------===//
//
// 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_reference operator[](size_type pos) const;
// reference operator[](size_type pos);
#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"
int main(int, char**)
{
{
typedef std::string S;
S s("0123456789");
const S& cs = s;
ASSERT_SAME_TYPE(decltype( s[0]), typename S::reference);
ASSERT_SAME_TYPE(decltype(cs[0]), typename S::const_reference);
LIBCPP_ASSERT_NOEXCEPT( s[0]);
LIBCPP_ASSERT_NOEXCEPT( cs[0]);
for (S::size_type i = 0; i < cs.size(); ++i)
{
assert(s[i] == static_cast<char>('0' + i));
assert(cs[i] == s[i]);
}
assert(cs[cs.size()] == '\0');
const S s2 = S();
assert(s2[0] == '\0');
}
#if TEST_STD_VER >= 11
{
typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
S s("0123456789");
const S& cs = s;
ASSERT_SAME_TYPE(decltype( s[0]), typename S::reference);
ASSERT_SAME_TYPE(decltype(cs[0]), typename S::const_reference);
LIBCPP_ASSERT_NOEXCEPT( s[0]);
LIBCPP_ASSERT_NOEXCEPT( cs[0]);
for (S::size_type i = 0; i < cs.size(); ++i)
{
assert(s[i] == static_cast<char>('0' + i));
assert(cs[i] == s[i]);
}
assert(cs[cs.size()] == '\0');
const S s2 = S();
assert(s2[0] == '\0');
}
#endif
#ifdef _LIBCPP_DEBUG
{
std::string s;
char c = s[0];
assert(c == '\0');
c = s[1];
assert(false);
}
#endif
return 0;
}