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 #ifndef _LIBCPP___ALGORITHM_IS_HEAP_H
10 #define _LIBCPP___ALGORITHM_IS_HEAP_H
11 
12 #include <__algorithm/comp.h>
13 #include <__algorithm/comp_ref_type.h>
14 #include <__algorithm/is_heap_until.h>
15 #include <__config>
16 #include <__iterator/iterator_traits.h>
17 
18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
19 #pragma GCC system_header
20 #endif
21 
22 _LIBCPP_BEGIN_NAMESPACE_STD
23 
24 template <class _RandomAccessIterator, class _Compare>
25 _LIBCPP_NODISCARD_EXT inline
26 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
27 bool
28 is_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp)
29 {
30     typedef typename __comp_ref_type<_Compare>::type _Comp_ref;
31     return _VSTD::__is_heap_until<_Comp_ref>(__first, __last, __comp) == __last;
32 }
33 
34 template<class _RandomAccessIterator>
35 _LIBCPP_NODISCARD_EXT inline
36 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
37 bool
38 is_heap(_RandomAccessIterator __first, _RandomAccessIterator __last)
39 {
40     return _VSTD::is_heap(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>());
41 }
42 
43 _LIBCPP_END_NAMESPACE_STD
44 
45 #endif // _LIBCPP___ALGORITHM_IS_HEAP_H
46