You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
60 lines
1.3 KiB
60 lines
1.3 KiB
#pragma once |
|
|
|
#include <cstddef> |
|
#include <memory> |
|
#include <type_traits> |
|
#include <utility> |
|
|
|
#include "appfat.h" |
|
|
|
namespace devilution { |
|
|
|
/** |
|
* @brief A stack-allocated vector with a fixed capacity. |
|
* |
|
* @tparam T element type. |
|
* @tparam N capacity. |
|
*/ |
|
template <class T, size_t N> |
|
class StaticVector { |
|
public: |
|
template <typename... Args> |
|
T &emplace_back(Args &&...args) // NOLINT(readability-identifier-naming) |
|
{ |
|
assert(size_ < N); |
|
::new (&data_[size_]) T(std::forward<Args>(args)...); |
|
#if __cplusplus >= 201703L |
|
T &result = *std::launder(reinterpret_cast<T *>(&data_[size_])); |
|
#else |
|
T &result = *reinterpret_cast<T *>(&data_[size_]); |
|
#endif |
|
++size_; |
|
return result; |
|
} |
|
|
|
const T &operator[](std::size_t pos) const |
|
{ |
|
#if __cplusplus >= 201703L |
|
return *std::launder(reinterpret_cast<const T *>(&data_[pos])); |
|
#else |
|
return *reinterpret_cast<const T *>(&data_[pos]); |
|
#endif |
|
} |
|
|
|
~StaticVector() |
|
{ |
|
for (std::size_t pos = 0; pos < size_; ++pos) { |
|
#if __cplusplus >= 201703L |
|
std::destroy_at(std::launder(reinterpret_cast<T *>(&data_[pos]))); |
|
#else |
|
reinterpret_cast<T *>(&data_[pos])->~T(); |
|
#endif |
|
} |
|
} |
|
|
|
private: |
|
std::aligned_storage_t<sizeof(T), alignof(T)> data_[N]; |
|
std::size_t size_ = 0; |
|
}; |
|
|
|
} // namespace devilution
|
|
|