/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ /* A compile-time constant-length array with bounds-checking assertions. */ #ifndef mozilla_Array_h #define mozilla_Array_h #include "mozilla/Assertions.h" #include "mozilla/Attributes.h" #include "mozilla/Move.h" #include "mozilla/ReverseIterator.h" #include <stddef.h> namespace mozilla { template<typename T, size_t Length> class Array { T mArr[Length]; public: Array() {} template <typename... Args> MOZ_IMPLICIT Array(Args&&... aArgs) : mArr{mozilla::Forward<Args>(aArgs)...} { static_assert(sizeof...(aArgs) == Length, "The number of arguments should be equal to the template parameter Length"); } T& operator[](size_t aIndex) { MOZ_ASSERT(aIndex < Length); return mArr[aIndex]; } const T& operator[](size_t aIndex) const { MOZ_ASSERT(aIndex < Length); return mArr[aIndex]; } typedef T* iterator; typedef const T* const_iterator; typedef ReverseIterator<T*> reverse_iterator; typedef ReverseIterator<const T*> const_reverse_iterator; // Methods for range-based for loops. iterator begin() { return mArr; } const_iterator begin() const { return mArr; } const_iterator cbegin() const { return begin(); } iterator end() { return mArr + Length; } const_iterator end() const { return mArr + Length; } const_iterator cend() const { return end(); } // Methods for reverse iterating. reverse_iterator rbegin() { return reverse_iterator(end()); } const_reverse_iterator rbegin() const { return const_reverse_iterator(end()); } const_reverse_iterator crbegin() const { return rbegin(); } reverse_iterator rend() { return reverse_iterator(begin()); } const_reverse_iterator rend() const { return const_reverse_iterator(begin()); } const_reverse_iterator crend() const { return rend(); } }; template<typename T> class Array<T, 0> { public: T& operator[](size_t aIndex) { MOZ_CRASH("indexing into zero-length array"); } const T& operator[](size_t aIndex) const { MOZ_CRASH("indexing into zero-length array"); } }; } /* namespace mozilla */ #endif /* mozilla_Array_h */