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Merge 8b3941a33 into d917039b0

Pull Request Pull Request #20: Pipecleaning policy and casting issues

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85.31

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

// ================================= BIT_ARRAY_BASE =================================== //
// Project:     The Experimental Bit Algorithms Library
// \file        bit_array_base.hpp
// Description: Base implementation for bit_array variants
// Creator:     Vincent Reverdy
// Contributor: Peter McLean [2025]
// License:     BSD 3-Clause License
// ========================================================================== //
#ifndef _BIT_ARRAY_BASE_HPP_INCLUDED
#define _BIT_ARRAY_BASE_HPP_INCLUDED
// ========================================================================== //

// ================================ PREAMBLE ================================ //
// C++ standard library
#include <algorithm>
#include <bit>
#include <cmath>
#include <span>
#include <string>
#include <type_traits>
#include <vector>

// Project sources
#include "bitlib/bit-algorithms/bit_algorithm.hpp"
#include "bitlib/bit-containers/bit_bitsof.hpp"
#include "bitlib/bit-containers/bit_policy.hpp"
#include "bitlib/bit-iterator/bit.hpp"

namespace bit {

template <typename T, size_t N, typename W, typename Policy>
class array_ref;

template <typename T,
          std::size_t N,
          typename W,
          typename Policy>
class array;

/**
 * @brief Base class template for array implementations
 *
 * This is a CRTP (Curiously Recurring Template Pattern) base class that provides
 * common functionality for array variants.
 *
 * @tparam Derived The derived class (CRTP pattern)
 * @tparam T The value type (typically bit_value)
 * @tparam W The word type used for storage
 * @tparam N The size of the bit array, or std::dynamic_extent for dynamic size
 * @tparam Policy The policy for integral conversion (default is typical)
 * @tparam Iterators A struct that provides iterator and const_iterator types
 */
template <typename Derived, typename T, size_t N, typename W, bool resizable, typename Policy, typename Iterators>
class array_base : public detail::container_size_storage<std::size_t, resizable, N> {
 protected:
  constexpr Derived& derived() noexcept {
    return static_cast<Derived&>(*this);
  }

  constexpr const Derived& derived() const noexcept {
    return static_cast<const Derived&>(*this);
  }

 public:
  using word_type = W;
  using value_type = T;
  using size_type = std::size_t;
  using difference_type = std::ptrdiff_t;
  using reference = typename std::conditional<std::is_same_v<T, bit_value>, bit_reference<word_type&>, T&>::type;
  using const_reference = typename std::conditional<std::is_same_v<T, bit_value>, const bit_reference<const word_type&>, const T&>::type;
  using pointer = typename std::conditional<std::is_same_v<T, bit_value>, bit_pointer<word_type>, T&>::type;
  using const_pointer = const pointer;
  using iterator = Iterators::iterator;
  using const_iterator = Iterators::const_iterator;

  constexpr array_base() noexcept : detail::container_size_storage<std::size_t, resizable, N>() {}
  constexpr array_base(const size_type& size) noexcept
    requires(N == std::dynamic_extent)
      : detail::container_size_storage<std::size_t, resizable, N>(size) {}

  // Element access
  constexpr reference operator[](size_type pos) {
    return derived().begin()[pos];
  }

  constexpr const_reference operator[](size_type pos) const {
    return derived().begin()[pos];
  }

  constexpr reference at(size_type pos) {
    if (pos < derived().size()) {
      return derived().begin()[pos];
    } else {
      throw std::out_of_range("Position is out of range");
    }
  }

  constexpr const_reference at(size_type pos) const {
    if (pos < derived().size()) {
      return derived().begin()[pos];
    } else {
      throw std::out_of_range("Position is out of range");
    }
  }

  constexpr reference front() {
    return derived().begin()[0];
  }

  constexpr const_reference front() const {
    return derived().begin()[0];
  }

  constexpr reference back() {
    return derived().begin()[derived().size() - 1];
  }

  constexpr const_reference back() const {
    return derived().begin()[derived().size() - 1];
  }

  constexpr iterator end() noexcept {
    return derived().begin() + derived().size();
  }

  constexpr const_iterator end() const noexcept {
    return const_iterator(derived().begin()) + derived().size();
  }

  constexpr const_iterator cbegin() const noexcept {
    return const_iterator(derived().begin());
  }

  constexpr const_iterator cend() const noexcept {
    return const_iterator(derived().end());
  }

  // Capacity
  constexpr bool empty() const noexcept {
    return 0 == derived().size();
  }

  constexpr size_type max_size() const noexcept {
    return derived().size();
  }

  // String representation
  constexpr std::string debug_string() const {
    return debug_string(derived().begin(), derived().end());
  }

  constexpr std::string debug_string(const_iterator first, const_iterator last) const {
    std::string ret = "";
    auto position = 0;
    for (auto it = first; it != last; ++it) {
      if (position % bitsof<word_type>() == 0 && position != 0) {
        ret += " ";
      } else if (position % 8 == 0 && position != 0) {
        ret += '.';
      }
      ret += *it == bit1 ? '1' : '0';
      ++position;
    }
    return ret;
  }

  /**
   * @brief Slice operations - returns a array_ref
   */
  constexpr auto operator()(size_type offset, size_type right) const noexcept {
    return array_ref<value_type, std::dynamic_extent, const word_type, Policy>(&this->at(offset), right - offset);
  }

  /**
   * @brief Slice operations - returns a array_ref
   */
  constexpr auto operator()(size_type offset, size_type right) noexcept {
    return array_ref<value_type, std::dynamic_extent, word_type, Policy>(&this->at(offset), right - offset);
  }

  // Common operations
  constexpr void fill(value_type bit_val) noexcept {
    std::fill(derived().begin(), derived().end(), bit_val);
  }

  /**
   * @brief Explicit conversion to integral types
   */
  template <std::integral U>
  explicit constexpr operator U() const noexcept {
    assert(derived().size() <= bitsof<U>());
    U integral;

    if constexpr (N == std::dynamic_extent) {
      if (derived().size() > bitsof<U>()) {
        Policy::truncation::template to_integral<U, N>(derived(), integral);
      } else {
        ::bit::copy(derived().begin(), end(), bit_pointer<U>(&integral));
      }
      if (derived().size() < bitsof<U>()) {
        Policy::extension::template to_integral<U, N>(derived(), integral, detail::uninitialized);
      }
    } else {
      if constexpr (N > bitsof<U>()) {
        Policy::truncation::template to_integral<U, N>(derived(), integral);
      } else {
        ::bit::copy(derived().begin(), end(), bit_pointer<U>(&integral));
      }
      if constexpr (N < bitsof<U>()) {
        Policy::extension::template to_integral<U, N>(derived(), integral, detail::uninitialized);
      }
    }

    return integral;
  }

  using compatible_bitarray = array<value_type, N, word_type, Policy>;

  constexpr compatible_bitarray operator~() {
    compatible_bitarray result(derived().size());
    transform(derived().begin(), derived().end(), result.begin(), [](const word_type& bits) -> word_type { return ~bits; });
    return result;
  }

  constexpr compatible_bitarray operator|(const bit_sized_range auto& other) const {
    assert(other.size() == derived().size());
    compatible_bitarray result(derived().size());
    transform(derived().begin(), derived().end(), other.begin(), result.begin(),
              [](const word_type& a, const word_type& b) -> word_type { return a | b; });
    return result;
  }
  constexpr Derived& operator|=(bit_sized_range auto& other) {
    assert(other.size() == derived().size());
    transform(derived().begin(), derived().end(), other.begin(), derived().begin(),
              [](const word_type& a, const word_type& b) -> word_type { return a | b; });
    return derived();
  }
  constexpr compatible_bitarray operator&(const bit_sized_range auto& other) const {
    assert(other.size() == derived().size());
    compatible_bitarray result(derived().size());
    transform(derived().begin(), derived().end(), other.begin(), result.begin(),
              [](const word_type& a, const word_type& b) -> word_type { return a & b; });
    return result;
  }
  constexpr Derived& operator&=(bit_sized_range auto& other) {
    assert(other.size() == derived().size());
    transform(derived().begin(), derived().end(), other.begin(), derived().begin(),
              [](const word_type& a, const word_type& b) -> word_type { return a & b; });
    return derived();
  }
  constexpr compatible_bitarray operator^(const bit_sized_range auto& other) const {
    assert(other.size() == derived().size());
    compatible_bitarray result(derived().size());
    transform(derived().begin(), derived().end(), other.begin(), result.begin(),
              [](const word_type& a, const word_type& b) -> word_type { return a ^ b; });
    return result;
  }
  constexpr Derived& operator^=(bit_sized_range auto& other) {
    assert(other.size() == derived().size());
    transform(derived().begin(), derived().end(), other.begin(), derived().begin(),
              [](const word_type& a, const word_type& b) -> word_type { return a ^ b; });
    return derived();
  }

 protected:
  template <typename U>
  constexpr void from_integral(const U& integral) {
    if constexpr (N == std::dynamic_extent) {
      if ((derived().size() * bitsof<value_type>()) < bitsof<U>()) {
        Policy::truncation::template from_integral<U, N>(derived(), integral);
      } else {
        bit_pointer<const U> integral_ptr(&integral);
        ::bit::copy(integral_ptr, integral_ptr + bitsof<U>(), derived().begin());
      }
      if (bitsof<U>() < (derived().size() * bitsof<value_type>())) {
        Policy::extension::template from_integral<U, N>(derived(), integral, detail::uninitialized);
      }
    } else {
      if constexpr ((N * bitsof<value_type>()) < bitsof<U>()) {
        Policy::truncation::template from_integral<U, N>(derived(), integral);
      } else {
        bit_pointer<const U> integral_ptr(&integral);
        ::bit::copy(integral_ptr, integral_ptr + bitsof<U>(), derived().begin());
      }
      if constexpr (bitsof<U>() < (N * bitsof<value_type>())) {
        Policy::extension::template from_integral<U, N>(derived(), integral, detail::uninitialized);
      }
    }
  }
};

constexpr bool operator==(const bit_sized_range auto& lhs, const bit_sized_range auto& rhs) {
  if (lhs.size() != rhs.size()) {
    return false;
  }
  return ::bit::equal(lhs.begin(), lhs.end(), rhs.begin());
}

}  // namespace bit

#endif  // _BIT_ARRAY_BASE_HPP_INCLUDED

1	// ================================= BIT_ARRAY_BASE =================================== //
2	// Project: The Experimental Bit Algorithms Library
3	// \file bit_array_base.hpp
4	// Description: Base implementation for bit_array variants
5	// Creator: Vincent Reverdy
6	// Contributor: Peter McLean [2025]
7	// License: BSD 3-Clause License
8	// ========================================================================== //
9	#ifndef _BIT_ARRAY_BASE_HPP_INCLUDED
10	#define _BIT_ARRAY_BASE_HPP_INCLUDED
11	// ========================================================================== //
12
13	// ================================ PREAMBLE ================================ //
14	// C++ standard library
15	#include <algorithm>
16	#include <bit>
17	#include <cmath>
18	#include <span>
19	#include <string>
20	#include <type_traits>
21	#include <vector>
22
23	// Project sources
24	#include "bitlib/bit-algorithms/bit_algorithm.hpp"
25	#include "bitlib/bit-containers/bit_bitsof.hpp"
26	#include "bitlib/bit-containers/bit_policy.hpp"
27	#include "bitlib/bit-iterator/bit.hpp"
28
29	namespace bit {
30
31	template <typename T, size_t N, typename W, typename Policy>
32	class array_ref;
33
34	template <typename T,
35	std::size_t N,
36	typename W,
37	typename Policy>
38	class array;
39
40	/**
41	* @brief Base class template for array implementations
42	*
43	* This is a CRTP (Curiously Recurring Template Pattern) base class that provides
44	* common functionality for array variants.
45	*
46	* @tparam Derived The derived class (CRTP pattern)
47	* @tparam T The value type (typically bit_value)
48	* @tparam W The word type used for storage
49	* @tparam N The size of the bit array, or std::dynamic_extent for dynamic size
50	* @tparam Policy The policy for integral conversion (default is typical)
51	* @tparam Iterators A struct that provides iterator and const_iterator types
52	*/
53	template <typename Derived, typename T, size_t N, typename W, bool resizable, typename Policy, typename Iterators>
54	class array_base : public detail::container_size_storage<std::size_t, resizable, N> {
55	protected:
56	constexpr Derived& derived() noexcept {	4,170✔
57	return static_cast<Derived&>(*this);	4,170✔
58	}	2,085✔
59
60	constexpr const Derived& derived() const noexcept {	242✔
61	return static_cast<const Derived&>(*this);	242✔
62	}	121✔
63
64	public:
65	using word_type = W;
66	using value_type = T;
67	using size_type = std::size_t;
68	using difference_type = std::ptrdiff_t;
69	using reference = typename std::conditional<std::is_same_v<T, bit_value>, bit_reference<word_type&>, T&>::type;
70	using const_reference = typename std::conditional<std::is_same_v<T, bit_value>, const bit_reference<const word_type&>, const T&>::type;
71	using pointer = typename std::conditional<std::is_same_v<T, bit_value>, bit_pointer<word_type>, T&>::type;
72	using const_pointer = const pointer;
73	using iterator = Iterators::iterator;
74	using const_iterator = Iterators::const_iterator;
75
76	constexpr array_base() noexcept : detail::container_size_storage<std::size_t, resizable, N>() {}	313✔
77	constexpr array_base(const size_type& size) noexcept	122✔
78	requires(N == std::dynamic_extent)
79	: detail::container_size_storage<std::size_t, resizable, N>(size) {}	244✔
80
81	// Element access
82	constexpr reference operator[](size_type pos) {	3,576✔
83	return derived().begin()[pos];	5,364✔
84	}	1,788✔
85
86	constexpr const_reference operator[](size_type pos) const {
87	return derived().begin()[pos];
88	}
89
90	constexpr reference at(size_type pos) {	26✔
91	if (pos < derived().size()) {	26!
92	return derived().begin()[pos];	30✔
93	} else {	10✔
94	throw std::out_of_range("Position is out of range");	6✔
95	}	3✔
96	}	13✔
97
98	constexpr const_reference at(size_type pos) const {
99	if (pos < derived().size()) {
100	return derived().begin()[pos];
101	} else {
102	throw std::out_of_range("Position is out of range");
103	}
104	}
105
106	constexpr reference front() {	6✔
107	return derived().begin()[0];	9✔
108	}	3✔
109
110	constexpr const_reference front() const {
111	return derived().begin()[0];
112	}
113
114	constexpr reference back() {	6✔
115	return derived().begin()[derived().size() - 1];	9✔
116	}	3✔
117
118	constexpr const_reference back() const {
119	return derived().begin()[derived().size() - 1];
120	}
121
122	constexpr iterator end() noexcept {	128✔
123	return derived().begin() + derived().size();	128✔
124	}	64✔
125
126	constexpr const_iterator end() const noexcept {	94✔
127	return const_iterator(derived().begin()) + derived().size();	94✔
128	}	47✔
129
130	constexpr const_iterator cbegin() const noexcept {
131	return const_iterator(derived().begin());
132	}
133
134	constexpr const_iterator cend() const noexcept {
135	return const_iterator(derived().end());
136	}
137
138	// Capacity
139	constexpr bool empty() const noexcept {	8✔
140	return 0 == derived().size();	8✔
141	}	4✔
142
143	constexpr size_type max_size() const noexcept {	2✔
144	return derived().size();	2✔
145	}	1✔
146
147	// String representation
148	constexpr std::string debug_string() const {
149	return debug_string(derived().begin(), derived().end());
150	}
151
152	constexpr std::string debug_string(const_iterator first, const_iterator last) const {
153	std::string ret = "";
154	auto position = 0;
155	for (auto it = first; it != last; ++it) {
156	if (position % bitsof<word_type>() == 0 && position != 0) {
157	ret += " ";
158	} else if (position % 8 == 0 && position != 0) {
159	ret += '.';
160	}
161	ret += *it == bit1 ? '1' : '0';
162	++position;
163	}
164	return ret;
165	}
166
167	/**
168	* @brief Slice operations - returns a array_ref
169	*/
170	constexpr auto operator()(size_type offset, size_type right) const noexcept {
171	return array_ref<value_type, std::dynamic_extent, const word_type, Policy>(&this->at(offset), right - offset);
172	}
173
174	/**
175	* @brief Slice operations - returns a array_ref
176	*/
177	constexpr auto operator()(size_type offset, size_type right) noexcept {	16✔
178	return array_ref<value_type, std::dynamic_extent, word_type, Policy>(&this->at(offset), right - offset);	16✔
179	}	8✔
180
181	// Common operations
182	constexpr void fill(value_type bit_val) noexcept {	76✔
183	std::fill(derived().begin(), derived().end(), bit_val);	76✔
184	}	76✔
185
186	/**
187	* @brief Explicit conversion to integral types
188	*/
189	template <std::integral U>
190	explicit constexpr operator U() const noexcept {	6✔
191	assert(derived().size() <= bitsof<U>());	6!
192	U integral;	6✔
193
194	if constexpr (N == std::dynamic_extent) {	3✔
195	if (derived().size() > bitsof<U>()) {	4!
196	Policy::truncation::template to_integral<U, N>(derived(), integral);	×
197	} else {	2✔
198	::bit::copy(derived().begin(), end(), bit_pointer<U>(&integral));	4✔
199	}	2✔
200	if (derived().size() < bitsof<U>()) {	4!
NEW 201	Policy::extension::template to_integral<U, N>(derived(), integral, detail::uninitialized);	×
202	}
203	} else {	2✔
204	if constexpr (N > bitsof<U>()) {
205	Policy::truncation::template to_integral<U, N>(derived(), integral);
206	} else {	1✔
207	::bit::copy(derived().begin(), end(), bit_pointer<U>(&integral));	2✔
208	}	1✔
209	if constexpr (N < bitsof<U>()) {
210	Policy::extension::template to_integral<U, N>(derived(), integral, detail::uninitialized);
211	}
212	}	1✔
213
214	return integral;	6✔
215	}	3✔
216
217	using compatible_bitarray = array<value_type, N, word_type, Policy>;
218
219	constexpr compatible_bitarray operator~() {	4✔
220	compatible_bitarray result(derived().size());	6✔
221	transform(derived().begin(), derived().end(), result.begin(), [](const word_type& bits) -> word_type { return ~bits; });	8✔
222	return result;	6✔
223	}	2✔
224
225	constexpr compatible_bitarray operator\|(const bit_sized_range auto& other) const {	2✔
226	assert(other.size() == derived().size());	2!
227	compatible_bitarray result(derived().size());	2✔
228	transform(derived().begin(), derived().end(), other.begin(), result.begin(),	2✔
229	[](const word_type& a, const word_type& b) -> word_type { return a \| b; });	3✔
230	return result;	3✔
231	}	1✔
232	constexpr Derived& operator\|=(bit_sized_range auto& other) {	2✔
233	assert(other.size() == derived().size());	2!
234	transform(derived().begin(), derived().end(), other.begin(), derived().begin(),	2✔
235	[](const word_type& a, const word_type& b) -> word_type { return a \| b; });	3✔
236	return derived();	3✔
237	}	1✔
238	constexpr compatible_bitarray operator&(const bit_sized_range auto& other) const {	2✔
239	assert(other.size() == derived().size());	2!
240	compatible_bitarray result(derived().size());	2✔
241	transform(derived().begin(), derived().end(), other.begin(), result.begin(),	2✔
242	[](const word_type& a, const word_type& b) -> word_type { return a & b; });	3✔
243	return result;	3✔
244	}	1✔
245	constexpr Derived& operator&=(bit_sized_range auto& other) {	2✔
246	assert(other.size() == derived().size());	2!
247	transform(derived().begin(), derived().end(), other.begin(), derived().begin(),	2✔
248	[](const word_type& a, const word_type& b) -> word_type { return a & b; });	3✔
249	return derived();	3✔
250	}	1✔
251	constexpr compatible_bitarray operator^(const bit_sized_range auto& other) const {	2✔
252	assert(other.size() == derived().size());	2!
253	compatible_bitarray result(derived().size());	2✔
254	transform(derived().begin(), derived().end(), other.begin(), result.begin(),	2✔
255	[](const word_type& a, const word_type& b) -> word_type { return a ^ b; });	3✔
256	return result;	3✔
257	}	1✔
258	constexpr Derived& operator^=(bit_sized_range auto& other) {	2✔
259	assert(other.size() == derived().size());	2!
260	transform(derived().begin(), derived().end(), other.begin(), derived().begin(),	2✔
261	[](const word_type& a, const word_type& b) -> word_type { return a ^ b; });	3✔
262	return derived();	3✔
263	}	1✔
264
265	protected:
266	template <typename U>
267	constexpr void from_integral(const U& integral) {	80✔
268	if constexpr (N == std::dynamic_extent) {
269	if ((derived().size() * bitsof<value_type>()) < bitsof<U>()) {
270	Policy::truncation::template from_integral<U, N>(derived(), integral);
271	} else {
272	bit_pointer<const U> integral_ptr(&integral);
273	::bit::copy(integral_ptr, integral_ptr + bitsof<U>(), derived().begin());
274	}
275	if (bitsof<U>() < (derived().size() * bitsof<value_type>())) {
276	Policy::extension::template from_integral<U, N>(derived(), integral, detail::uninitialized);
277	}
278	} else {	40✔
279	if constexpr ((N * bitsof<value_type>()) < bitsof<U>()) {	40✔
280	Policy::truncation::template from_integral<U, N>(derived(), integral);	40✔
281	} else {	20✔
282	bit_pointer<const U> integral_ptr(&integral);	40✔
283	::bit::copy(integral_ptr, integral_ptr + bitsof<U>(), derived().begin());	40✔
284	}	20✔
285	if constexpr (bitsof<U>() < (N * bitsof<value_type>())) {
286	Policy::extension::template from_integral<U, N>(derived(), integral, detail::uninitialized);
287	}
288	}	40✔
289	}	80✔
290	};
291
292	constexpr bool operator==(const bit_sized_range auto& lhs, const bit_sized_range auto& rhs) {	56✔
293	if (lhs.size() != rhs.size()) {	56!
294	return false;	4✔
295	}	2✔
296	return ::bit::equal(lhs.begin(), lhs.end(), rhs.begin());	52✔
297	}	28✔
298
299	} // namespace bit
300
301	#endif // _BIT_ARRAY_BASE_HPP_INCLUDED

PeterCDMcLean / BitLib / 16094998079

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