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scratch_buffer: Add member types to ScratchBuffer

Allows for implicit conversion to std::span<T>.
This commit is contained in:
Morph 2023-06-24 19:58:45 -04:00
parent 9252ad4e10
commit b8c906f9d1

View file

@ -5,7 +5,6 @@
#include <iterator>
#include "common/concepts.h"
#include "common/make_unique_for_overwrite.h"
namespace Common {
@ -19,15 +18,22 @@ namespace Common {
template <typename T>
class ScratchBuffer {
public:
using iterator = T*;
using const_iterator = const T*;
using value_type = T;
using element_type = T;
using iterator_category = std::contiguous_iterator_tag;
using value_type = T;
using size_type = size_t;
using difference_type = std::ptrdiff_t;
using pointer = T*;
using const_pointer = const T*;
using reference = T&;
using const_reference = const T&;
using iterator = pointer;
using const_iterator = const_pointer;
using iterator_category = std::random_access_iterator_tag;
using iterator_concept = std::contiguous_iterator_tag;
ScratchBuffer() = default;
explicit ScratchBuffer(size_t initial_capacity)
explicit ScratchBuffer(size_type initial_capacity)
: last_requested_size{initial_capacity}, buffer_capacity{initial_capacity},
buffer{Common::make_unique_for_overwrite<T[]>(initial_capacity)} {}
@ -39,7 +45,7 @@ public:
/// This will only grow the buffer's capacity if size is greater than the current capacity.
/// The previously held data will remain intact.
void resize(size_t size) {
void resize(size_type size) {
if (size > buffer_capacity) {
auto new_buffer = Common::make_unique_for_overwrite<T[]>(size);
std::move(buffer.get(), buffer.get() + buffer_capacity, new_buffer.get());
@ -51,7 +57,7 @@ public:
/// This will only grow the buffer's capacity if size is greater than the current capacity.
/// The previously held data will be destroyed if a reallocation occurs.
void resize_destructive(size_t size) {
void resize_destructive(size_type size) {
if (size > buffer_capacity) {
buffer_capacity = size;
buffer = Common::make_unique_for_overwrite<T[]>(buffer_capacity);
@ -59,43 +65,43 @@ public:
last_requested_size = size;
}
[[nodiscard]] T* data() noexcept {
[[nodiscard]] pointer data() noexcept {
return buffer.get();
}
[[nodiscard]] const T* data() const noexcept {
[[nodiscard]] const_pointer data() const noexcept {
return buffer.get();
}
[[nodiscard]] T* begin() noexcept {
[[nodiscard]] iterator begin() noexcept {
return data();
}
[[nodiscard]] const T* begin() const noexcept {
[[nodiscard]] const_iterator begin() const noexcept {
return data();
}
[[nodiscard]] T* end() noexcept {
[[nodiscard]] iterator end() noexcept {
return data() + last_requested_size;
}
[[nodiscard]] const T* end() const noexcept {
[[nodiscard]] const_iterator end() const noexcept {
return data() + last_requested_size;
}
[[nodiscard]] T& operator[](size_t i) {
[[nodiscard]] reference operator[](size_type i) {
return buffer[i];
}
[[nodiscard]] const T& operator[](size_t i) const {
[[nodiscard]] const_reference operator[](size_type i) const {
return buffer[i];
}
[[nodiscard]] size_t size() const noexcept {
[[nodiscard]] size_type size() const noexcept {
return last_requested_size;
}
[[nodiscard]] size_t capacity() const noexcept {
[[nodiscard]] size_type capacity() const noexcept {
return buffer_capacity;
}
@ -106,8 +112,8 @@ public:
}
private:
size_t last_requested_size{};
size_t buffer_capacity{};
size_type last_requested_size{};
size_type buffer_capacity{};
std::unique_ptr<T[]> buffer{};
};