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constexprify ArrayView

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This commit is contained in:
Maxime Coste 2015-03-09 13:21:43 +00:00
parent 0bbaef6e48
commit 44f81d0b8b
1 changed files with 19 additions and 19 deletions
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38
src/array_view.hh
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@ -15,49 +15,49 @@ class ArrayView
public: public:
using size_t = std::size_t; using size_t = std::size_t;
ArrayView() constexpr ArrayView()
: m_pointer(nullptr), m_size(0) {} : m_pointer(nullptr), m_size(0) {}
ArrayView(const T& oneval) constexpr ArrayView(const T& oneval)
: m_pointer(&oneval), m_size(1) {} : m_pointer(&oneval), m_size(1) {}
ArrayView(const T* pointer, size_t size) constexpr ArrayView(const T* pointer, size_t size)
: m_pointer(pointer), m_size(size) {} : m_pointer(pointer), m_size(size) {}
ArrayView(const T* begin, const T* end) constexpr ArrayView(const T* begin, const T* end)
: m_pointer(begin), m_size(end - begin) {} : m_pointer(begin), m_size(end - begin) {}
template<size_t N> template<size_t N>
ArrayView(const T(&array)[N]) : m_pointer(array), m_size(N) {} constexpr ArrayView(const T(&array)[N]) : m_pointer(array), m_size(N) {}
template<typename Iterator> template<typename Iterator>
ArrayView(const Iterator& begin, const Iterator& end) constexpr ArrayView(const Iterator& begin, const Iterator& end)
: m_pointer(&(*begin)), m_size(end - begin) {} : m_pointer(&(*begin)), m_size(end - begin) {}
template<typename Alloc> template<typename Alloc>
ArrayView(const std::vector<T, Alloc>& v) constexpr ArrayView(const std::vector<T, Alloc>& v)
: m_pointer(&v[0]), m_size(v.size()) {} : m_pointer(&v[0]), m_size(v.size()) {}
ArrayView(const std::initializer_list<T>& v) constexpr ArrayView(const std::initializer_list<T>& v)
: m_pointer(v.begin()), m_size(v.size()) {} : m_pointer(v.begin()), m_size(v.size()) {}
const T* pointer() const { return m_pointer; } constexpr const T* pointer() const { return m_pointer; }
size_t size() const { return m_size; } constexpr size_t size() const { return m_size; }
const T& operator[](size_t n) const { return *(m_pointer + n); } constexpr const T& operator[](size_t n) const { return *(m_pointer + n); }
const T* begin() const { return m_pointer; } constexpr const T* begin() const { return m_pointer; }
const T* end() const { return m_pointer+m_size; } constexpr const T* end() const { return m_pointer+m_size; }
using reverse_iterator = std::reverse_iterator<const T*>; using reverse_iterator = std::reverse_iterator<const T*>;
reverse_iterator rbegin() const { return reverse_iterator(m_pointer+m_size); } constexpr reverse_iterator rbegin() const { return reverse_iterator(m_pointer+m_size); }
reverse_iterator rend() const { return reverse_iterator(m_pointer); } constexpr reverse_iterator rend() const { return reverse_iterator(m_pointer); }
const T& front() const { return *m_pointer; } constexpr const T& front() const { return *m_pointer; }
const T& back() const { return *(m_pointer + m_size - 1); } constexpr const T& back() const { return *(m_pointer + m_size - 1); }
bool empty() const { return m_size == 0; } constexpr bool empty() const { return m_size == 0; }
ArrayView subrange(size_t first, size_t count) const constexpr ArrayView subrange(size_t first, size_t count) const
{ {
return ArrayView(m_pointer + first, count); return ArrayView(m_pointer + first, count);
} }