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#ifndef constexpr_utils_hh_INCLUDED
#define constexpr_utils_hh_INCLUDED
#include <utility>
#include <initializer_list>
#include <stddef.h>
#include "array_view.hh"
namespace Kakoune
{
template<typename T, size_t N>
struct Array
{
constexpr size_t size() const { return N; }
constexpr const T& operator[](int i) const { return m_data[i]; }
constexpr const T* begin() const { return m_data; }
constexpr const T* end() const { return m_data+N; }
constexpr T& operator[](int i) { return m_data[i]; }
constexpr T* begin() { return m_data; }
constexpr T* end() { return m_data+N; }
constexpr operator ArrayView<T>() { return {m_data, N}; }
constexpr operator ConstArrayView<T>() const { return {m_data, N}; }
T m_data[N];
};
template<typename T, size_t N, size_t... Indices>
constexpr Array<T, N> make_array(const T (&data)[N], std::index_sequence<Indices...>)
{
static_assert(sizeof...(Indices) == N, "size mismatch");
return {{data[Indices]...}};
}
template<typename T, size_t N>
constexpr Array<T, N> make_array(const T (&data)[N])
{
return make_array(data, std::make_index_sequence<N>());
}
template<typename T, size_t capacity>
struct ConstexprVector
{
using iterator = T*;
using const_iterator = const T*;
constexpr ConstexprVector() : m_size{0} {}
constexpr ConstexprVector(std::initializer_list<T> items)
: m_size{items.size()}
{
T* ptr = m_data;
for (auto& item : items)
*ptr++ = std::move(item);
}
constexpr bool empty() const { return m_size == 0; }
constexpr size_t size() const { return m_size; }
constexpr void resize(size_t n, const T& val = {})
{
if (n >= capacity)
throw "capacity exceeded";
for (int i = m_size; i < n; ++i)
m_data[i] = val;
m_size = n;
kak_assert(this->size() == m_size); // check for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79520
}
constexpr T& operator[](size_t i) { return m_data[i]; }
constexpr const T& operator[](size_t i) const { return m_data[i]; }
constexpr iterator begin() { return m_data; }
constexpr iterator end() { return m_data + m_size; }
constexpr const_iterator begin() const { return m_data; }
constexpr const_iterator end() const { return m_data + m_size; }
size_t m_size;
T m_data[capacity] = {};
};
}
#endif // constexpr_utils_hh_INCLUDED
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