Petr Hosek
81 lines
2.7 KiB
C++
81 lines
2.7 KiB
C++
//===-- A self contained equivalent of std::array ---------------*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIBC_SRC___SUPPORT_CPP_ARRAY_H
|
|
#define LLVM_LIBC_SRC___SUPPORT_CPP_ARRAY_H
|
|
|
|
#include "src/__support/CPP/iterator.h" // reverse_iterator
|
|
#include "src/__support/macros/attributes.h"
|
|
#include "src/__support/macros/config.h"
|
|
#include <stddef.h> // For size_t.
|
|
|
|
namespace LIBC_NAMESPACE_DECL {
|
|
namespace cpp {
|
|
|
|
template <class T, size_t N> struct array {
|
|
static_assert(N != 0,
|
|
"Cannot create a LIBC_NAMESPACE::cpp::array of size 0.");
|
|
|
|
T Data[N];
|
|
using value_type = T;
|
|
using iterator = T *;
|
|
using const_iterator = const T *;
|
|
using reverse_iterator = cpp::reverse_iterator<iterator>;
|
|
using const_reverse_iterator = cpp::reverse_iterator<const_iterator>;
|
|
|
|
LIBC_INLINE constexpr T *data() { return Data; }
|
|
LIBC_INLINE constexpr const T *data() const { return Data; }
|
|
|
|
LIBC_INLINE constexpr T &front() { return Data[0]; }
|
|
LIBC_INLINE constexpr const T &front() const { return Data[0]; }
|
|
|
|
LIBC_INLINE constexpr T &back() { return Data[N - 1]; }
|
|
LIBC_INLINE constexpr const T &back() const { return Data[N - 1]; }
|
|
|
|
LIBC_INLINE constexpr T &operator[](size_t Index) { return Data[Index]; }
|
|
|
|
LIBC_INLINE constexpr const T &operator[](size_t Index) const {
|
|
return Data[Index];
|
|
}
|
|
|
|
LIBC_INLINE constexpr size_t size() const { return N; }
|
|
|
|
LIBC_INLINE constexpr bool empty() const { return N == 0; }
|
|
|
|
LIBC_INLINE constexpr iterator begin() { return Data; }
|
|
LIBC_INLINE constexpr const_iterator begin() const { return Data; }
|
|
LIBC_INLINE constexpr const_iterator cbegin() const { return begin(); }
|
|
|
|
LIBC_INLINE constexpr iterator end() { return Data + N; }
|
|
LIBC_INLINE constexpr const_iterator end() const { return Data + N; }
|
|
LIBC_INLINE constexpr const_iterator cend() const { return end(); }
|
|
|
|
LIBC_INLINE constexpr reverse_iterator rbegin() {
|
|
return reverse_iterator{end()};
|
|
}
|
|
LIBC_INLINE constexpr const_reverse_iterator rbegin() const {
|
|
return const_reverse_iterator{end()};
|
|
}
|
|
LIBC_INLINE constexpr const_reverse_iterator crbegin() const {
|
|
return rbegin();
|
|
}
|
|
|
|
LIBC_INLINE constexpr reverse_iterator rend() {
|
|
return reverse_iterator{begin()};
|
|
}
|
|
LIBC_INLINE constexpr const_reverse_iterator rend() const {
|
|
return const_reverse_iterator{begin()};
|
|
}
|
|
LIBC_INLINE constexpr const_reverse_iterator crend() const { return rend(); }
|
|
};
|
|
|
|
} // namespace cpp
|
|
} // namespace LIBC_NAMESPACE_DECL
|
|
|
|
#endif // LLVM_LIBC_SRC___SUPPORT_CPP_ARRAY_H
|