//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// bitset<N>& operator<<=(size_t pos); // constexpr since C++23
#include <bitset>
#include <cassert>
#include <cstddef>
#include <vector>
#include "../bitset_test_cases.h"
#include "test_macros.h"
template <std::size_t N>
TEST_CONSTEXPR_CXX23 bool test_left_shift() {
std::vector<std::bitset<N> > const cases = get_test_cases<N>();
for (std::size_t c = 0; c != cases.size(); ++c) {
for (std::size_t s = 0; s <= N+1; ++s) {
std::bitset<N> v1 = cases[c];
std::bitset<N> v2 = v1;
v1 <<= s;
for (std::size_t i = 0; i < v1.size(); ++i)
if (i < s)
assert(v1[i] == 0);
else
assert(v1[i] == v2[i-s]);
}
}
return true;
}
int main(int, char**) {
test_left_shift<0>();
test_left_shift<1>();
test_left_shift<31>();
test_left_shift<32>();
test_left_shift<33>();
test_left_shift<63>();
test_left_shift<64>();
test_left_shift<65>();
test_left_shift<1000>(); // not in constexpr because of constexpr evaluation step limits
#if TEST_STD_VER > 20
static_assert(test_left_shift<0>());
static_assert(test_left_shift<1>());
static_assert(test_left_shift<31>());
static_assert(test_left_shift<32>());
static_assert(test_left_shift<33>());
static_assert(test_left_shift<63>());
static_assert(test_left_shift<64>());
static_assert(test_left_shift<65>());
#endif
return 0;
}