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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
//
//===----------------------------------------------------------------------===//
// <array>
// reference at (size_type); // constexpr in C++17
#include <array>
#include <cassert>
#ifndef TEST_HAS_NO_EXCEPTIONS
# include <stdexcept>
#endif
#include "test_macros.h"
TEST_CONSTEXPR_CXX17 bool tests() {
{
typedef double T;
typedef std::array<T, 3> C;
C c = {1, 2, 3.5};
typename C::reference r1 = c.at(0);
assert(r1 == 1);
r1 = 5.5;
assert(c[0] == 5.5);
typename C::reference r2 = c.at(2);
assert(r2 == 3.5);
r2 = 7.5;
assert(c[2] == 7.5);
}
return true;
}
void test_exceptions() {
#ifndef TEST_HAS_NO_EXCEPTIONS
{
std::array<int, 4> array = {1, 2, 3, 4};
try {
TEST_IGNORE_NODISCARD array.at(4);
assert(false);
} catch (std::out_of_range const&) {
// pass
} catch (...) {
assert(false);
}
try {
TEST_IGNORE_NODISCARD array.at(5);
assert(false);
} catch (std::out_of_range const&) {
// pass
} catch (...) {
assert(false);
}
try {
TEST_IGNORE_NODISCARD array.at(6);
assert(false);
} catch (std::out_of_range const&) {
// pass
} catch (...) {
assert(false);
}
try {
using size_type = decltype(array)::size_type;
TEST_IGNORE_NODISCARD array.at(static_cast<size_type>(-1));
assert(false);
} catch (std::out_of_range const&) {
// pass
} catch (...) {
assert(false);
}
}
{
std::array<int, 0> array = {};
try {
TEST_IGNORE_NODISCARD array.at(0);
assert(false);
} catch (std::out_of_range const&) {
// pass
} catch (...) {
assert(false);
}
}
#endif
}
int main(int, char**) {
tests();
test_exceptions();
#if TEST_STD_VER >= 17
static_assert(tests(), "");
#endif
return 0;
}
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