16830501887

Committed 08 Aug 2025 12:32PM UTC coverage: 76.436% (-0.4%) from 76.797%

Build # 16830501887

Build Type

Pull #29

github

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web-flow

Commit Message

Merge d08a426b4 into 4adca69e9

Pull Request Pull Request #29: Explicitly cast inside _mask

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88.06

/include/bitlib/bit-containers/bit_array_ref.hpp

// ================================= BIT_ARRAY_REF =================================== //
// Project:     The Experimental Bit Algorithms Library
// \file        bit_array_ref.hpp
// Description: Implementation of bit_array_ref
// Creator:     Vincent Reverdy
// Contributor: Peter McLean [2025]
// License:     BSD 3-Clause License
// ========================================================================== //
#ifndef _BIT_ARRAY_REF_HPP_INCLUDED
#define _BIT_ARRAY_REF_HPP_INCLUDED

#include <algorithm>
#include <cstddef>
#include <initializer_list>
#include <memory>
#include <span>  // std::dynamic_extent
#include <stdexcept>

#include "bitlib/bit-algorithms/bit_algorithm.hpp"
#include "bitlib/bit-containers/bit_array_base.hpp"
#include "bitlib/bit-containers/bit_bitsof.hpp"
#include "bitlib/bit-containers/bit_policy.hpp"
#include "bitlib/bit-iterator/bit.hpp"
#include "bitlib/bit_concepts.hpp"

namespace bit {

template <typename T = bit_value, size_t N = std::dynamic_extent, typename W = std::uintptr_t, typename Policy = policy::typical<std::remove_cvref_t<W>>>
class array_ref;

template <size_t N = std::dynamic_extent, typename W = std::uintptr_t, typename Policy = policy::typical<std::remove_cvref_t<W>>>
using bit_array_ref = array_ref<bit_value, N, W, Policy>;

namespace detail {
template <typename word_type>
struct array_ref_iterator_types {
  using iterator = bit_iterator<word_type*>;
  using const_iterator = bit_iterator<const word_type*>;
};
}  // namespace detail
/**
 * @brief A non-owning reference to a bit array
 *
 * Similar to array_dynamic_extent but does not allocate or deallocate memory.
 * The pointer and size are const class members and cannot be re-bound.
 * Assignment operations always copy content and can't rebind the pointer/size.
 *
 * @tparam T The value type (typically bit_value)
 * @tparam W The word type used for storage
 */
template <typename T, size_t N, typename W, typename Policy>
class array_ref
    : public array_base<array_ref<T, N, W, Policy>, T, N, W, false, Policy, detail::array_ref_iterator_types<W>> {
 public:
  using base = array_base<array_ref<T, N, W, Policy>, T, N, W, false, Policy, detail::array_ref_iterator_types<W>>;
  using base::end;
  using base::size;
  using typename base::const_iterator;
  using typename base::const_pointer;
  using typename base::const_reference;
  using typename base::difference_type;
  using typename base::iterator;
  using typename base::pointer;
  using typename base::reference;
  using typename base::size_type;
  using typename base::value_type;
  using typename base::word_type;

 private:
  const bit_pointer<word_type> m_storage;

 public:
  // Constructors
  array_ref() = delete;

  /**
   * @brief Constructs a non-owning reference to a bit array
   *
   * @param storage Pointer to the storage
   * @param extent Number of bits
   */
  constexpr array_ref(word_type* storage, size_type extent)
    requires(N == std::dynamic_extent)
      : base(extent), m_storage(storage) {
  }
  constexpr array_ref(word_type* storage)
    requires(N != std::dynamic_extent)
      : base(), m_storage(storage) {
  }

  /**
   * @brief Constructs a non-owning reference to a bit array using a bit_pointer
   *
   * @param storage bit_pointer to the storage
   * @param extent Number of bits
   */
  constexpr array_ref(bit_pointer<word_type> storage, size_type extent)
    requires(N == std::dynamic_extent)
      : base(extent), m_storage(storage) {
  }
  constexpr array_ref(bit_pointer<word_type> storage)
    requires(N != std::dynamic_extent)
      : base(), m_storage(storage) {
  }

  /**
   * @brief Constructs a non-owning reference to a bit array from a bit_sized_range
   *
   * @param other bit_sized_range
   */
  constexpr array_ref(bit_range auto& other, size_type extent)
    requires(N == std::dynamic_extent)
      : base(extent), m_storage(&(*other.begin())) {
    assert(extent <= static_cast<size_type>(other.end() - other.begin()));
  }
  constexpr array_ref(bit_range auto& other)
    requires(N != std::dynamic_extent)
      : base(), m_storage(&(*other.begin())) {
    assert(N <= static_cast<size_type>(other.end() - other.begin()));
  }

  /**
   * @brief Constructs a non-owning reference to a bit array from a bit_sized_range
   *
   * @param other bit_sized_range
   */
  constexpr array_ref(const bit_range auto& other, size_type extent)
    requires((N == std::dynamic_extent) && std::is_const_v<W>)
      : base(extent), m_storage(&(*other.begin())) {
    assert(extent <= (other.end() - other.begin()));
  }
  constexpr array_ref(const bit_range auto& other)
    requires((N != std::dynamic_extent) && std::is_const_v<W>)
      : base(), m_storage(&(*other.begin())) {
    assert(N <= (other.end() - other.begin()));
  }

  /**
   * @brief Copy constructor
   */
  constexpr array_ref(const array_ref& other) = default;

  /**
   * @brief Move constructor
   */
  constexpr array_ref(array_ref&& other) = default;

  /**
   * @brief Range Assignment operator - copies content but doesn't rebind
   */
  constexpr array_ref& operator=(const bit_sized_range auto& other) {
    if (size() != other.size()) {
      throw std::invalid_argument("Cannot assign from array_ref of different size");
    }
    ::bit::copy(other.begin(), other.end(), this->begin());
    return *this;
  }

  /**
   * @brief Copy Assignment operator - copies content but doesn't rebind
   */
  constexpr array_ref& operator=(const array_ref& other) {
    if (this != &other) {
      if (size() != other.size()) {
        throw std::invalid_argument("Cannot assign from array_ref of different size");
      }
      ::bit::copy(other.begin(), other.end(), this->begin());
    }
    return *this;
  }

  /**
   * @brief Move assignment operator - copies content but doesn't rebind
   */
  constexpr array_ref& operator=(array_ref&& other) {
    if (this != &other) {
      if (size() != other.size()) {
        throw std::invalid_argument("Cannot assign from array_ref of different size");
      }
      ::bit::copy(other.begin(), other.end(), this->begin());
    }
    return *this;
  }

  /**
   * @brief No destructor needed as we don't own the memory
   */
  ~array_ref() = default;

  /*
   * Iterators
   */
  constexpr iterator begin() noexcept {
    return iterator(m_storage);
  }

  constexpr const_iterator begin() const noexcept {
    return const_iterator(m_storage);
  }

  /*
   * Operations
   */
  constexpr void swap(array_ref& other) {
    if (size() != other.size()) {
      throw std::invalid_argument("Cannot swap array_ref of different sizes");
    }
    swap_ranges(begin(), end(), other.begin());
  }
};

static_assert(bit_range<array_ref<>>, "array_ref<> does not satisfy bit_range concept!");
static_assert(bit_sized_range<array_ref<>>, "array_ref<> does not satisfy bit_sized_range concept!");
#ifdef CONTIGUOUS_RANGE
static_assert(bit_contiguous_range<array_ref<>>, "array_ref<> does not satisfy bit_contiguous_range concept!");
static_assert(bit_contiguous_sized_range<array_ref<>>, "array_ref<> does not satisfy bit_contiguous_sized_range concept!");
#endif

// ========================================================================== //
}  // namespace bit

#endif  // _BIT_ARRAY_REF_HPP_INCLUDED

1	// ================================= BIT_ARRAY_REF =================================== //
2	// Project: The Experimental Bit Algorithms Library
3	// \file bit_array_ref.hpp
4	// Description: Implementation of bit_array_ref
5	// Creator: Vincent Reverdy
6	// Contributor: Peter McLean [2025]
7	// License: BSD 3-Clause License
8	// ========================================================================== //
9	#ifndef _BIT_ARRAY_REF_HPP_INCLUDED
10	#define _BIT_ARRAY_REF_HPP_INCLUDED
11
12	#include <algorithm>
13	#include <cstddef>
14	#include <initializer_list>
15	#include <memory>
16	#include <span> // std::dynamic_extent
17	#include <stdexcept>
18
19	#include "bitlib/bit-algorithms/bit_algorithm.hpp"
20	#include "bitlib/bit-containers/bit_array_base.hpp"
21	#include "bitlib/bit-containers/bit_bitsof.hpp"
22	#include "bitlib/bit-containers/bit_policy.hpp"
23	#include "bitlib/bit-iterator/bit.hpp"
24	#include "bitlib/bit_concepts.hpp"
25
26	namespace bit {
27
28	template <typename T = bit_value, size_t N = std::dynamic_extent, typename W = std::uintptr_t, typename Policy = policy::typical<std::remove_cvref_t<W>>>
29	class array_ref;
30
31	template <size_t N = std::dynamic_extent, typename W = std::uintptr_t, typename Policy = policy::typical<std::remove_cvref_t<W>>>
32	using bit_array_ref = array_ref<bit_value, N, W, Policy>;
33
34	namespace detail {
35	template <typename word_type>
36	struct array_ref_iterator_types {
37	using iterator = bit_iterator<word_type*>;
38	using const_iterator = bit_iterator<const word_type*>;
39	};
40	} // namespace detail
41	/**
42	* @brief A non-owning reference to a bit array
43	*
44	* Similar to array_dynamic_extent but does not allocate or deallocate memory.
45	* The pointer and size are const class members and cannot be re-bound.
46	* Assignment operations always copy content and can't rebind the pointer/size.
47	*
48	* @tparam T The value type (typically bit_value)
49	* @tparam W The word type used for storage
50	*/
51	template <typename T, size_t N, typename W, typename Policy>
52	class array_ref
53	: public array_base<array_ref<T, N, W, Policy>, T, N, W, false, Policy, detail::array_ref_iterator_types<W>> {
54	public:
55	using base = array_base<array_ref<T, N, W, Policy>, T, N, W, false, Policy, detail::array_ref_iterator_types<W>>;
56	using base::end;
57	using base::size;
58	using typename base::const_iterator;
59	using typename base::const_pointer;
60	using typename base::const_reference;
61	using typename base::difference_type;
62	using typename base::iterator;
63	using typename base::pointer;
64	using typename base::reference;
65	using typename base::size_type;
66	using typename base::value_type;
67	using typename base::word_type;
68
69	private:
70	const bit_pointer<word_type> m_storage;
71
72	public:
73	// Constructors
74	array_ref() = delete;
75
76	/**
77	* @brief Constructs a non-owning reference to a bit array
78	*
79	* @param storage Pointer to the storage
80	* @param extent Number of bits
81	*/
82	constexpr array_ref(word_type* storage, size_type extent)	7✔
83	requires(N == std::dynamic_extent)
84	: base(extent), m_storage(storage) {	14✔
85	}	14✔
86	constexpr array_ref(word_type* storage)
87	requires(N != std::dynamic_extent)
88	: base(), m_storage(storage) {
89	}
90
91	/**
92	* @brief Constructs a non-owning reference to a bit array using a bit_pointer
93	*
94	* @param storage bit_pointer to the storage
95	* @param extent Number of bits
96	*/
97	constexpr array_ref(bit_pointer<word_type> storage, size_type extent)	788,308✔
98	requires(N == std::dynamic_extent)
99	: base(extent), m_storage(storage) {	1,576,616✔
100	}	1,576,616✔
101	constexpr array_ref(bit_pointer<word_type> storage)	42✔
102	requires(N != std::dynamic_extent)
103	: base(), m_storage(storage) {	84✔
104	}	84✔
105
106	/**
107	* @brief Constructs a non-owning reference to a bit array from a bit_sized_range
108	*
109	* @param other bit_sized_range
110	*/
111	constexpr array_ref(bit_range auto& other, size_type extent)	2✔
112	requires(N == std::dynamic_extent)
113	: base(extent), m_storage(&(*other.begin())) {	4✔
114	assert(extent <= static_cast<size_type>(other.end() - other.begin()));	4!
115	}	4✔
116	constexpr array_ref(bit_range auto& other)
117	requires(N != std::dynamic_extent)
118	: base(), m_storage(&(*other.begin())) {
119	assert(N <= static_cast<size_type>(other.end() - other.begin()));
120	}
121
122	/**
123	* @brief Constructs a non-owning reference to a bit array from a bit_sized_range
124	*
125	* @param other bit_sized_range
126	*/
127	constexpr array_ref(const bit_range auto& other, size_type extent)
128	requires((N == std::dynamic_extent) && std::is_const_v<W>)
129	: base(extent), m_storage(&(*other.begin())) {
130	assert(extent <= (other.end() - other.begin()));
131	}
132	constexpr array_ref(const bit_range auto& other)
133	requires((N != std::dynamic_extent) && std::is_const_v<W>)
134	: base(), m_storage(&(*other.begin())) {
135	assert(N <= (other.end() - other.begin()));
136	}
137
138	/**
139	* @brief Copy constructor
140	*/
141	constexpr array_ref(const array_ref& other) = default;
142
143	/**
144	* @brief Move constructor
145	*/
146	constexpr array_ref(array_ref&& other) = default;
147
148	/**
149	* @brief Range Assignment operator - copies content but doesn't rebind
150	*/
151	constexpr array_ref& operator=(const bit_sized_range auto& other) {	1,824✔
152	if (size() != other.size()) {	1,824!
153	throw std::invalid_argument("Cannot assign from array_ref of different size");	2✔
154	}	1✔
155	::bit::copy(other.begin(), other.end(), this->begin());	1,822✔
156	return *this;	2,733✔
157	}	912✔
158
159	/**
160	* @brief Copy Assignment operator - copies content but doesn't rebind
161	*/
162	constexpr array_ref& operator=(const array_ref& other) {	6✔
163	if (this != &other) {	6!
164	if (size() != other.size()) {	6✔
165	throw std::invalid_argument("Cannot assign from array_ref of different size");	2✔
166	}	1✔
167	::bit::copy(other.begin(), other.end(), this->begin());	4✔
168	}	2✔
169	return *this;	6✔
170	}	3✔
171
172	/**
173	* @brief Move assignment operator - copies content but doesn't rebind
174	*/
175	constexpr array_ref& operator=(array_ref&& other) {	524,288✔
176	if (this != &other) {	524,288!
177	if (size() != other.size()) {	524,288!
UNCOV 178	throw std::invalid_argument("Cannot assign from array_ref of different size");	×
179	}
180	::bit::copy(other.begin(), other.end(), this->begin());	524,288✔
181	}	262,144✔
182	return *this;	786,432✔
183	}	262,144✔
184
185	/**
186	* @brief No destructor needed as we don't own the memory
187	*/
188	~array_ref() = default;
189
190	/*
191	* Iterators
192	*/
193	constexpr iterator begin() noexcept {	2,627,976✔
194	return iterator(m_storage);	2,627,976✔
195	}	1,313,988✔
196
197	constexpr const_iterator begin() const noexcept {	38✔
198	return const_iterator(m_storage);	38✔
199	}	19✔
200
201	/*
202	* Operations
203	*/
204	constexpr void swap(array_ref& other) {	4✔
205	if (size() != other.size()) {	4✔
206	throw std::invalid_argument("Cannot swap array_ref of different sizes");	2✔
207	}	1✔
208	swap_ranges(begin(), end(), other.begin());	2✔
209	}	2✔
210	};
211
212	static_assert(bit_range<array_ref<>>, "array_ref<> does not satisfy bit_range concept!");
213	static_assert(bit_sized_range<array_ref<>>, "array_ref<> does not satisfy bit_sized_range concept!");
214	#ifdef CONTIGUOUS_RANGE
215	static_assert(bit_contiguous_range<array_ref<>>, "array_ref<> does not satisfy bit_contiguous_range concept!");
216	static_assert(bit_contiguous_sized_range<array_ref<>>, "array_ref<> does not satisfy bit_contiguous_sized_range concept!");
217	#endif
218
219	// ========================================================================== //
220	} // namespace bit
221
222	#endif // _BIT_ARRAY_REF_HPP_INCLUDED

PeterCDMcLean / BitLib / 16830501887

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