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// -*- C++ -*-
//===------------------------------ span ---------------------------------===//
//
// 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
//
//===---------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// <span>
// template<size_t Count>
// constexpr span<element_type, Count> first() const;
//
// constexpr span<element_type, dynamic_extent> first(size_type count) const;
//
// Requires: Count <= size().
#include <span>
#include <cstddef>
#include "test_macros.h"
constexpr int carr[] = {1, 2, 3, 4};
int main(int, char**) {
std::span<const int, 4> sp(carr);
// Count too large
{
[[maybe_unused]] auto s1 = sp.first<5>(); // expected-error-re@span:* {{static_assert failed{{( due to requirement '.*')?}} "Count out of range in span::first()"}}
}
// Count numeric_limits
{
[[maybe_unused]] auto s1 = sp.first<std::size_t(-1)>(); // expected-error-re@span:* {{static_assert failed{{( due to requirement '.*')?}} "Count out of range in span::first()"}}
}
return 0;
}
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