88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
#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
|