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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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// UNSUPPORTED: libcpp-no-concepts
// UNSUPPORTED: gcc-10
// UNSUPPORTED: clang-10
// UNSUPPORTED: libcpp-has-no-incomplete-ranges
// unspecified begin;
#include <ranges>
#include <type_traits>
using end_t = decltype(std::ranges::end);
// clang-format off
template <class T>
requires(!std::invocable<end_t&, T>)
void f() {}
// clang-format on
void test() {
struct incomplete;
f<incomplete(&)[]>();
// expected-error@*:* {{"`std::ranges::begin` is SFINAE-unfriendly on arrays of an incomplete type."}}
// expected-error@*:* {{"`std::ranges::end` is SFINAE-unfriendly on arrays of an incomplete type."}}
f<incomplete(&)[10]>();
// expected-error@*:* {{"`std::ranges::begin` is SFINAE-unfriendly on arrays of an incomplete type."}}
// expected-error@*:* {{"`std::ranges::end` is SFINAE-unfriendly on arrays of an incomplete type."}}
// expected-error@-3 {{no matching function for call to 'f'}}
f<incomplete(&)[2][2]>();
// expected-error@*:* {{"`std::ranges::begin` is SFINAE-unfriendly on arrays of an incomplete type."}}
// expected-error@-2 {{no matching function for call to 'f'}}
// This is okay because calling `std::ranges::end` on any rvalue is ill-formed.
f<incomplete(&&)[10]>();
}
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