1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // UNSUPPORTED: c++03, c++11, c++14, c++17
10 // UNSUPPORTED: libcpp-has-no-incomplete-ranges
11 
12 // template<class T>
13 // concept range;
14 
15 #include <ranges>
16 
17 #include <vector>
18 
19 #include "test_range.h"
20 
21 
22 
23 static_assert(std::ranges::range<test_range<cpp20_input_iterator> >);
24 
25 struct incompatible_iterators {
26   int* begin();
27   long* end();
28 };
29 static_assert(!std::ranges::range<incompatible_iterators>);
30 
31 struct int_begin_int_end {
32   int begin();
33   int end();
34 };
35 static_assert(!std::ranges::range<int_begin_int_end>);
36 
37 struct iterator_begin_int_end {
38   int* begin();
39   int end();
40 };
41 static_assert(!std::ranges::range<iterator_begin_int_end>);
42 
43 struct int_begin_iterator_end {
44   int begin();
45   int* end();
46 };
47 static_assert(!std::ranges::range<int_begin_iterator_end>);
48 
49 // Test ADL-proofing.
50 struct Incomplete;
51 template<class T> struct Holder { T t; };
52 static_assert(!std::ranges::range<Holder<Incomplete>*>);
53