at.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 at(size_type pos) const;
// reference at(size_type pos);
// When back-deploying to macosx10.7, the RTTI for exception classes
// incorrectly provided by libc++.dylib is mixed with the one in
// libc++abi.dylib and exceptions are not caught properly.
// XFAIL: with_system_cxx_lib=macosx10.7
#include <string>
#include <stdexcept>
#include <cassert>
#include "min_allocator.h"
#include "test_macros.h"
template <class S>
void
test(S s, typename S::size_type pos)
{
const S& cs = s;
if (pos < s.size())
{
assert(s.at(pos) == s[pos]);
assert(cs.at(pos) == cs[pos]);
}
#ifndef TEST_HAS_NO_EXCEPTIONS
else
{
try
{
TEST_IGNORE_NODISCARD s.at(pos);
assert(false);
}
catch (std::out_of_range&)
{
assert(pos >= s.size());
}
try
{
TEST_IGNORE_NODISCARD cs.at(pos);
assert(false);
}
catch (std::out_of_range&)
{
assert(pos >= s.size());
}
}
#endif
}
int main(int, char**)
{
{
typedef std::string S;
test(S(), 0);
test(S("123"), 0);
test(S("123"), 1);
test(S("123"), 2);
test(S("123"), 3);
}
#if TEST_STD_VER >= 11
{
typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
test(S(), 0);
test(S("123"), 0);
test(S("123"), 1);
test(S("123"), 2);
test(S("123"), 3);
}
#endif
return 0;
}