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ircd::vector_view: Add constexpr constructions.

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This commit is contained in:
Jason Volk 2022-07-12 15:43:53 -07:00
parent ec55b9b30f
commit d87eba3485
1 changed files with 11 additions and 3 deletions
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14
include/ircd/vector_view.h
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@ -35,9 +35,9 @@ struct ircd::vector_view
pointer _stop { nullptr };
public:
pointer data() const noexcept { return _data; }
size_t size() const noexcept { return std::distance(_data, _stop); }
bool empty() const noexcept { return !size(); }
constexpr pointer data() const noexcept { return _data; }
constexpr size_t size() const noexcept { return std::distance(_data, _stop); }
constexpr bool empty() const noexcept { return !size(); }
const_iterator begin() const noexcept { return data(); }
const_iterator end() const noexcept { return _stop; }
@ -75,22 +75,26 @@ struct ircd::vector_view
return at(0);
}
constexpr
vector_view(const pointer __restrict__ start, const pointer __restrict__ stop)
noexcept
:_data{start}
,_stop{stop}
{}
constexpr
vector_view(const pointer __restrict__ start, const size_t size)
noexcept
:vector_view(start, start + size)
{}
constexpr
vector_view(const vector_view<value_type> &start, const size_t &size)
noexcept
:vector_view(start.data(), std::min(start.size(), size))
{}
constexpr
vector_view(const std::initializer_list<value_type> &list)
noexcept
:vector_view(std::begin(list), std::end(list))
@ -111,6 +115,7 @@ struct ircd::vector_view
{}
template<size_t SIZE>
constexpr
vector_view(value_type (&__restrict__ buffer)[SIZE])
noexcept
:vector_view(buffer, SIZE)
@ -118,18 +123,21 @@ struct ircd::vector_view
template<class U,
size_t SIZE>
constexpr
vector_view(const std::array<U, SIZE> &array)
noexcept
:vector_view(const_cast<pointer>(array.data()), array.size())
{}
template<size_t SIZE>
constexpr
vector_view(std::array<value_type, SIZE> &array)
noexcept
:vector_view(array.data(), array.size())
{}
// Required for reasonable implicit const conversion of value_type.
constexpr
vector_view(const vector_view<typename std::remove_const<value_type>::type> &v)
noexcept
:vector_view(v.data(), v.size())