MonsterDefense/lib/eastl/include/EASTL/vector.h

/*
Copyright (C) 2009-2010 Electronic Arts, Inc.  All rights reserved.

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modification, are permitted provided that the following conditions
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    notice, this list of conditions and the following disclaimer.
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    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.
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    its contributors may be used to endorse or promote products derived
    from this software without specific prior written permission.

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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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*/

///////////////////////////////////////////////////////////////////////////////
// EASTL/vector.h
//
// Copyright (c) 2005, Electronic Arts. All rights reserved.
// Written and maintained by Paul Pedriana.
///////////////////////////////////////////////////////////////////////////////

///////////////////////////////////////////////////////////////////////////////
// This file implements a vector (array-like container), much like the C++ 
// std::vector class.
// The primary distinctions between this vector and std::vector are:
//    - vector has a couple extension functions that increase performance.
//    - vector can contain objects with alignment requirements. std::vector 
//      cannot do so without a bit of tedious non-portable effort.
//    - vector supports debug memory naming natively.
//    - vector is easier to read, debug, and visualize.
//    - vector is savvy to an environment that doesn't have exception handling,
//      as is sometimes the case with console or embedded environments.
//    - vector has less deeply nested function calls and allows the user to 
//      enable forced inlining in debug builds in order to reduce bloat.
//    - vector<bool> is a vector of boolean values and not a bit vector.
//    - vector guarantees that memory is contiguous and that vector::iterator
//      is nothing more than a pointer to T.
//    - vector has an explicit data() method for obtaining a pointer to storage 
//      which is safe to call even if the block is empty. This avoids the 
//      common &v[0], &v.front(), and &*v.begin() constructs that trigger false 
//      asserts in STL debugging modes.
//    - vector::size_type is defined as eastl_size_t instead of size_t in order to 
//      save memory and run faster on 64 bit systems.
//    - vector data is guaranteed to be contiguous.
//    - vector has a set_capacity() function which frees excess capacity. 
//      The only way to do this with std::vector is via the cryptic non-obvious 
//      trick of using: vector<SomeClass>(x).swap(x);
///////////////////////////////////////////////////////////////////////////////


#ifndef EASTL_VECTOR_H
#define EASTL_VECTOR_H


#include <EASTL/internal/config.h>
#include <EASTL/allocator.h>
#include <EASTL/type_traits.h>
#include <EASTL/iterator.h>
#include <EASTL/algorithm.h>
#include <EASTL/memory.h>

#ifdef _MSC_VER
#  pragma warning(push, 0)
#  include <new>
#  include <stddef.h>
#  pragma warning(pop)
#else
#  include <new>
#  include <stddef.h>
#endif

#if EASTL_EXCEPTIONS_ENABLED
#  ifdef _MSC_VER
#    pragma warning(push, 0)
#  endif
#  include <stdexcept> // std::out_of_range, std::length_error.
#  ifdef _MSC_VER
#    pragma warning(pop)
#  endif
#endif

#ifdef _MSC_VER
#  pragma warning(push)
#  pragma warning(disable: 4530)  // C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc
#  pragma warning(disable: 4345)  // Behavior change: an object of POD type constructed with an initializer of the form () will be default-initialized
#  pragma warning(disable: 4244)  // Argument: conversion from 'int' to 'const eastl::vector<T>::value_type', possible loss of data
#  pragma warning(disable: 4127)  // Conditional expression is constant
#  pragma warning(disable: 4480)  // nonstandard extension used: specifying underlying type for enum
#endif


namespace eastl
{

    /// EASTL_VECTOR_DEFAULT_NAME
    ///
    /// Defines a default container name in the absence of a user-provided name.
    ///
#ifndef EASTL_VECTOR_DEFAULT_NAME
#  define EASTL_VECTOR_DEFAULT_NAME EASTL_DEFAULT_NAME_PREFIX " vector" // Unless the user overrides something, this is "EASTL vector".
#endif


    /// EASTL_VECTOR_DEFAULT_ALLOCATOR
    ///
#ifndef EASTL_VECTOR_DEFAULT_ALLOCATOR
#  define EASTL_VECTOR_DEFAULT_ALLOCATOR allocator_type(EASTL_VECTOR_DEFAULT_NAME)
#endif



    /// VectorBase
    ///
    /// The reason we have a VectorBase class is that it makes exception handling
    /// simpler to implement because memory allocation is implemented entirely 
    /// in this class. If a user creates a vector which needs to allocate
    /// memory in the constructor, VectorBase handles it. If an exception is thrown
    /// by the allocator then the exception throw jumps back to the user code and 
    /// no try/catch code need be written in the vector or VectorBase constructor. 
    /// If an exception is thrown in the vector (not VectorBase) constructor, the 
    /// destructor for VectorBase will be called automatically (and free the allocated
    /// memory) before the execution jumps back to the user code.
    /// However, if the vector class were to handle both allocation and initialization
    /// then it would have no choice but to implement an explicit try/catch statement
    /// for all pathways that allocate memory. This increases code size and decreases
    /// performance and makes the code a little harder read and maintain.
    ///
    /// The C++ standard (15.2 paragraph 2) states: 
    ///    "An object that is partially constructed or partially destroyed will
    ///     have destructors executed for all its fully constructed subobjects,
    ///     that is, for subobjects for which the constructor has been completed
    ///     execution and the destructor has not yet begun execution."
    ///
    /// The C++ standard (15.3 paragraph 11) states: 
    ///    "The fully constructed base classes and members of an object shall 
    ///     be destroyed before entering the handler of a function-try-block
    ///     of a constructor or destructor for that block."
    ///
    template <typename T, typename Allocator>
    struct VectorBase
    {
        typedef Allocator    allocator_type;
        typedef eastl_size_t size_type;             // See config.h for the definition of eastl_size_t, which defaults to uint32_t.
        typedef ptrdiff_t    difference_type;

#if defined(_MSC_VER) && (_MSC_VER >= 1400) // _MSC_VER of 1400 means VC8 (VS2005), 1500 means VC9 (VS2008)
            enum : size_type {                      // Use Microsoft enum language extension, allowing for smaller debug symbols than using a static const. Users have been affected by this.
                npos     = (size_type)-1,
                kMaxSize = (size_type)-2
            };
#else
            static const size_type npos     = (size_type)-1;      /// 'npos' means non-valid position or simply non-position.
            static const size_type kMaxSize = (size_type)-2;      /// -1 is reserved for 'npos'. It also happens to be slightly beneficial that kMaxSize is a value less than -1, as it helps us deal with potential integer wraparound issues.
#endif

        enum
        {
            kAlignment       = EASTL_ALIGN_OF(T),
            kAlignmentOffset = 0
        };

    protected:
        T*              mpBegin;
        T*              mpEnd;
        T*              mpCapacity;
        allocator_type  mAllocator;  // To do: Use base class optimization to make this go away.

    public:
        VectorBase();
        VectorBase(const allocator_type& allocator);
        VectorBase(size_type n, const allocator_type& allocator);

       ~VectorBase();

        allocator_type& get_allocator();
        void            set_allocator(const allocator_type& allocator);

    protected:
        T*        DoAllocate(size_type n);
        void      DoFree(T* p, size_type n);
        size_type GetNewCapacity(size_type currentCapacity);

    }; // VectorBase




    /// vector
    ///
    /// Implements a dynamic array.
    ///
    template <typename T, typename Allocator = EASTLAllocatorType>
    class vector : public VectorBase<T, Allocator>
    {
        typedef VectorBase<T, Allocator>                      base_type;
        typedef vector<T, Allocator>                          this_type;

    public:
        typedef T                                             value_type;
        typedef T*                                            pointer;
        typedef const T*                                      const_pointer;
        typedef T&                                            reference;
        typedef const T&                                      const_reference;  // Maintainer note: We want to leave iterator defined as T* -- at least in release builds -- as this gives some algorithms an advantage that optimizers cannot get around.
        typedef T*                                            iterator;         // Note: iterator is simply T* right now, but this will likely change in the future, at least for debug builds. 
        typedef const T*                                      const_iterator;   //       Do not write code that relies on iterator being T*. The reason it will 
        typedef eastl::reverse_iterator<iterator>             reverse_iterator; //       change in the future is that a debugging iterator system will be created.
        typedef eastl::reverse_iterator<const_iterator>       const_reverse_iterator;    
        typedef typename base_type::size_type                 size_type;
        typedef typename base_type::difference_type           difference_type;
        typedef typename base_type::allocator_type            allocator_type;

        using base_type::mpBegin;
        using base_type::mpEnd;
        using base_type::mpCapacity;
        using base_type::mAllocator;
        using base_type::npos;
        using base_type::GetNewCapacity;
        using base_type::DoAllocate;
        using base_type::DoFree;

    public:
        vector();
        explicit vector(const allocator_type& allocator);
        explicit vector(size_type n, const allocator_type& allocator = EASTL_VECTOR_DEFAULT_ALLOCATOR);
        vector(size_type n, const value_type& value, const allocator_type& allocator = EASTL_VECTOR_DEFAULT_ALLOCATOR);
        vector(const this_type& x);

#ifdef EA_COMPILER_HAS_MOVE_SEMANTICS
        vector(this_type&& x);
        this_type& operator =(this_type&& x);
        iterator insert(iterator position, value_type&& value);
        void push_back(value_type&& x);
#  ifdef EA_COMPILER_HAS_VARIADIC_TEMPLATES
        /*
        template<class ... Args>
        iterator emplace(const_iterator pos, Args&& ... args);
        template<class ... Args>
        iterator emplace_back(const_iterator pos, Args&& ... args);
        */
#  endif
#endif

        template <typename InputIterator>
        vector(InputIterator first, InputIterator last); // allocator arg removed because VC7.1 fails on the default arg. To do: Make a second version of this function without a default arg.

       ~vector();

        this_type& operator=(const this_type& x);
        void swap(this_type& x);

        void assign(size_type n, const value_type& value);

        template <typename InputIterator>
        void assign(InputIterator first, InputIterator last);

        iterator       begin();
        const_iterator begin() const;
        
        iterator       end();
        const_iterator end() const;

        reverse_iterator       rbegin();
        const_reverse_iterator rbegin() const;

        reverse_iterator       rend();
        const_reverse_iterator rend() const;

        bool      empty() const;
        size_type size() const;
        size_type capacity() const;

        void resize(size_type n, const value_type& value);
        void resize(size_type n);
        void reserve(size_type n);
        void set_capacity(size_type n = base_type::npos);   // Revises the capacity to the user-specified value. Resizes the container to match the capacity if the requested capacity n is less than the current size. If n == npos then the capacity is reallocated (if necessary) such that capacity == size.

        pointer       data();
        const_pointer data() const;

        reference       operator[](size_type n);
        const_reference operator[](size_type n) const;

        reference       at(size_type n);
        const_reference at(size_type n) const;

        reference       front();
        const_reference front() const;

        reference       back();
        const_reference back() const;

        void      push_back(const value_type& value);
        reference push_back();
        void*     push_back_uninitialized();

        void      pop_back();

        iterator insert(iterator position, const value_type& value);
        void     insert(iterator position, size_type n, const value_type& value);

        template <typename InputIterator>
        void insert(iterator position, InputIterator first, InputIterator last);

        iterator erase(iterator position);
        iterator erase(iterator first, iterator last);

        reverse_iterator erase(reverse_iterator position);
        reverse_iterator erase(reverse_iterator first, reverse_iterator last);

        void     clear();
        void     reset();   /// This is a unilateral reset to an initially empty state. No destructors are called, no deallocation occurs.

        bool validate() const;
        int  validate_iterator(const_iterator i) const;

    protected:
        // These functions do the real work of maintaining the vector. You will notice
        // that many of them have the same name but are specialized on iterator_tag
        // (iterator categories). This is because in these cases there is an optimized
        // implementation that can be had for some cases relative to others. Functions
        // which aren't referenced are neither compiled nor linked into the application.

        template <typename ForwardIterator>
        pointer DoRealloc(size_type n, ForwardIterator first, ForwardIterator last);

        template <typename Integer>
        void DoInit(Integer n, Integer value, true_type);

        template <typename InputIterator>
        void DoInit(InputIterator first, InputIterator last, false_type);

        template <typename InputIterator>
        void DoInitFromIterator(InputIterator first, InputIterator last, EASTL_ITC_NS::input_iterator_tag);

        template <typename ForwardIterator>
        void DoInitFromIterator(ForwardIterator first, ForwardIterator last, EASTL_ITC_NS::forward_iterator_tag);

        void DoDestroyValues(pointer first, pointer last);

        template <typename Integer>
        void DoAssign(Integer n, Integer value, true_type);

        template <typename InputIterator>
        void DoAssign(InputIterator first, InputIterator last, false_type);

        void DoAssignValues(size_type n, const value_type& value);

        template <typename InputIterator>
        void DoAssignFromIterator(InputIterator first, InputIterator last, EASTL_ITC_NS::input_iterator_tag);

        template <typename RandomAccessIterator>
        void DoAssignFromIterator(RandomAccessIterator first, RandomAccessIterator last, EASTL_ITC_NS::random_access_iterator_tag);

        template <typename Integer>
        void DoInsert(iterator position, Integer n, Integer value, true_type);

        template <typename InputIterator>
        void DoInsert(iterator position, InputIterator first, InputIterator last, false_type);

        template <typename InputIterator>
        void DoInsertFromIterator(iterator position, InputIterator first, InputIterator last, EASTL_ITC_NS::input_iterator_tag);

        template <typename BidirectionalIterator>
        void DoInsertFromIterator(iterator position, BidirectionalIterator first, BidirectionalIterator last, EASTL_ITC_NS::bidirectional_iterator_tag);

        void DoInsertValues(iterator position, size_type n, const value_type& value);

        void DoInsertValue(iterator position, const value_type& value);

    }; // class vector






    ///////////////////////////////////////////////////////////////////////
    // VectorBase
    ///////////////////////////////////////////////////////////////////////

    template <typename T, typename Allocator>
    inline VectorBase<T, Allocator>::VectorBase()
        : mpBegin(NULL), 
          mpEnd(NULL),
          mpCapacity(NULL),
          mAllocator(EASTL_VECTOR_DEFAULT_NAME)
    {
    }

    template <typename T, typename Allocator>
    inline VectorBase<T, Allocator>::VectorBase(const allocator_type& allocator)
        : mpBegin(NULL), 
          mpEnd(NULL),
          mpCapacity(NULL),
          mAllocator(allocator)
    {
    }


    template <typename T, typename Allocator>
    inline VectorBase<T, Allocator>::VectorBase(size_type n, const allocator_type& allocator)
        : mAllocator(allocator)
    {
        mpBegin    = DoAllocate(n);
        mpEnd      = mpBegin;
        mpCapacity = mpBegin + n;
    }


    template <typename T, typename Allocator>
    inline VectorBase<T, Allocator>::~VectorBase()
    {
        if(mpBegin)
            EASTLFree(mAllocator, mpBegin, (mpCapacity - mpBegin) * sizeof(T));
    }


    template <typename T, typename Allocator>
    inline typename VectorBase<T, Allocator>::allocator_type&
    VectorBase<T, Allocator>::get_allocator()
    {
        return mAllocator;
    }


    template <typename T, typename Allocator>
    inline void VectorBase<T, Allocator>::set_allocator(const allocator_type& allocator)
    {
        mAllocator = allocator;
    }


    template <typename T, typename Allocator>
    inline T* VectorBase<T, Allocator>::DoAllocate(size_type n)
    {
#if EASTL_ASSERT_ENABLED
            if(EASTL_UNLIKELY(n >= 0x80000000))
                EASTL_FAIL_MSG("vector::DoAllocate -- improbably large request.");
#endif

        // If n is zero, then we allocate no memory and just return NULL. 
        // This is fine, as our default ctor initializes with NULL pointers. 
        return n ? (T*)allocate_memory(mAllocator, n * sizeof(T), kAlignment, kAlignmentOffset) : NULL;
    }


    template <typename T, typename Allocator>
    inline void VectorBase<T, Allocator>::DoFree(T* p, size_type n)
    {
        if(p)
            EASTLFree(mAllocator, p, n * sizeof(T)); 
    }


    template <typename T, typename Allocator>
    inline typename VectorBase<T, Allocator>::size_type
    VectorBase<T, Allocator>::GetNewCapacity(size_type currentCapacity)
    {
        // This needs to return a value of at least currentCapacity and at least 1.
        return (currentCapacity > 0) ? (2 * currentCapacity) : 1;
    }




    ///////////////////////////////////////////////////////////////////////
    // vector
    ///////////////////////////////////////////////////////////////////////

    template <typename T, typename Allocator>
    inline vector<T, Allocator>::vector()
        : base_type()
    {
        // Empty
    }


    template <typename T, typename Allocator>
    inline vector<T, Allocator>::vector(const allocator_type& allocator)
        : base_type(allocator)
    {
        // Empty
    }


    template <typename T, typename Allocator>
    inline vector<T, Allocator>::vector(size_type n, const allocator_type& allocator)
        : base_type(n, allocator)
    {
        eastl::uninitialized_fill_n_ptr(mpBegin, n, value_type());
        mpEnd = mpBegin + n;        
    }


    template <typename T, typename Allocator>
    inline vector<T, Allocator>::vector(size_type n, const value_type& value, const allocator_type& allocator)
        : base_type(n, allocator)
    {
        eastl::uninitialized_fill_n_ptr(mpBegin, n, value);
        mpEnd = mpBegin + n;
    }


    template <typename T, typename Allocator>
    inline vector<T, Allocator>::vector(const this_type& x)
        : base_type(x.size(), x.mAllocator)
    {
        mpEnd = eastl::uninitialized_copy_ptr(x.mpBegin, x.mpEnd, mpBegin);
    }


    template <typename T, typename Allocator>
    template <typename InputIterator>
    inline vector<T, Allocator>::vector(InputIterator first, InputIterator last)
        : base_type(EASTL_VECTOR_DEFAULT_ALLOCATOR)
    {
        DoInit(first, last, is_integral<InputIterator>());
    }

#ifdef EA_COMPILER_HAS_MOVE_SEMANTICS
    template <typename T, typename Allocator>
    inline vector<T, Allocator>::vector(vector<T, Allocator>&& x)
           : base_type()
    {
      if(&x == this) { return; }

      swap(x);
    }

    template <typename T, typename Allocator>
    inline vector<T, Allocator>& vector<T, Allocator>::operator =(vector<T, Allocator>&& x)
    {
      if(&x != this) {
        this->~VectorBase();

        mpBegin = NULL; 
        mpEnd = NULL;
        mpCapacity = NULL;
        mAllocator = EASTL_VECTOR_DEFAULT_NAME;

        swap(x);
      }
      return *this;
    }

    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::iterator vector<T, Allocator>::insert(
        typename vector<T, Allocator>::iterator const pos, T&& x)
    {
      iterator const ret = insert(pos, value_type());
      *ret = x;
      return ret;
    }

    template <typename T, typename Allocator>
    inline void vector<T, Allocator>::push_back(T&& x) {
      push_back() = x;
    }
#  ifdef EA_COMPILER_HAS_VARIADIC_TEMPLATES
    /*
    template <typename T, typename Allocator>
    template<class ... Args>
    typename vector<T, Allocator>::iterator vector<T, Allocator>::emplace(const_iterator pos, Args&& ... args);

    template <typename T, typename Allocator>
    template<class ... Args>
    typename vector<T, Allocator>::iterator vector<T, Allocator>::emplace_back(const_iterator pos, Args&& ... args);
    */
#  endif
#endif

    template <typename T, typename Allocator>
    inline vector<T, Allocator>::~vector()
    {
        // Call destructor for the values. Parent class will free the memory.
        DoDestroyValues(mpBegin, mpEnd);
    }


    template <typename T, typename Allocator>
    typename vector<T, Allocator>::this_type&
    vector<T, Allocator>::operator=(const this_type& x)
    {
        if(&x != this)
        {
#if EASTL_ALLOCATOR_COPY_ENABLED
                mAllocator = x.mAllocator;
#endif

            const size_type n = x.size();

            if(n > size_type(mpCapacity - mpBegin)) // If n > capacity ...
            {
                pointer const pNewData = DoRealloc(n, x.mpBegin, x.mpEnd);
                DoDestroyValues(mpBegin, mpEnd);
                DoFree(mpBegin, (size_type)(mpCapacity - mpBegin));
                mpBegin    = pNewData;
                mpCapacity = mpBegin + n;
            }
            else if(n > size_type(mpEnd - mpBegin)) // If size < n <= capacity ...
            {
                eastl::copy(x.mpBegin, x.mpBegin + (mpEnd - mpBegin), mpBegin);
                eastl::uninitialized_copy_ptr(x.mpBegin + (mpEnd - mpBegin), x.mpEnd, mpEnd);
            }
            else // else n <= size
            {
                iterator const position = eastl::copy(x.mpBegin, x.mpEnd, mpBegin);
                DoDestroyValues(position, mpEnd);
            }
            mpEnd = mpBegin + n;
        }
        return *this;
    }


    template <typename T, typename Allocator>
    inline void vector<T, Allocator>::assign(size_type n, const value_type& value)
    {
        DoAssignValues(n, value);
    }


    template <typename T, typename Allocator>
    template <typename InputIterator>                              
    inline void vector<T, Allocator>::assign(InputIterator first, InputIterator last)
    {
        // It turns out that the C++ std::vector<int, int> specifies a two argument
        // version of assign that takes (int size, int value). These are not iterators, 
        // so we need to do a template compiler trick to do the right thing.
        DoAssign(first, last, is_integral<InputIterator>());
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::iterator
    vector<T, Allocator>::begin()
    {
        return mpBegin;
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::const_iterator
    vector<T, Allocator>::begin() const
    {
        return mpBegin;
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::iterator
    vector<T, Allocator>::end()
    {
        return mpEnd;
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::const_iterator
    vector<T, Allocator>::end() const
    {
        return mpEnd;
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::reverse_iterator
    vector<T, Allocator>::rbegin()
    {
        return reverse_iterator(mpEnd);
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::const_reverse_iterator
    vector<T, Allocator>::rbegin() const
    {
        return const_reverse_iterator(mpEnd);
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::reverse_iterator
    vector<T, Allocator>::rend()
    {
        return reverse_iterator(mpBegin);
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::const_reverse_iterator
    vector<T, Allocator>::rend() const
    {
        return const_reverse_iterator(mpBegin);
    }


    template <typename T, typename Allocator>
    bool vector<T, Allocator>::empty() const
    {
        return (mpBegin == mpEnd);
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::size_type
    vector<T, Allocator>::size() const
    {
        return (size_type)(mpEnd - mpBegin);
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::size_type
    vector<T, Allocator>::capacity() const
    {
        return (size_type)(mpCapacity - mpBegin);
    }


    template <typename T, typename Allocator>
    inline void vector<T, Allocator>::resize(size_type n, const value_type& value)
    {
        if(n > (size_type)(mpEnd - mpBegin))  // We expect that more often than not, resizes will be upsizes.
            insert(mpEnd, n - ((size_type)(mpEnd - mpBegin)), value);
        else
            erase(mpBegin + n, mpEnd);
    }


    template <typename T, typename Allocator>
    inline void vector<T, Allocator>::resize(size_type n)
    {
        // Alternative implementation:
        // resize(n, value_type());

        if(n > (size_type)(mpEnd - mpBegin))  // We expect that more often than not, resizes will be upsizes.
            insert(mpEnd, n - ((size_type)(mpEnd - mpBegin)), value_type());
        else
            erase(mpBegin + n, mpEnd);
    }


    template <typename T, typename Allocator>
    void vector<T, Allocator>::reserve(size_type n)
    {
        // If the user wants to reduce the reserved memory, there is the set_capacity function.
        if(n > size_type(mpCapacity - mpBegin)) // If n > capacity ...
        {
            // To consider: fold this reserve implementation with the set_capacity 
            // implementation below. But we need to be careful to not call resize
            // in the implementation, as that would require the user to have a 
            // default constructor, which we are trying to avoid.
            pointer const pNewData = DoRealloc(n, mpBegin, mpEnd);
            DoDestroyValues(mpBegin, mpEnd);
            DoFree(mpBegin, (size_type)(mpCapacity - mpBegin));

            const ptrdiff_t nPrevSize = mpEnd - mpBegin;
            mpBegin    = pNewData;
            mpEnd      = pNewData + nPrevSize;
            mpCapacity = mpBegin + n;
        }
    }


    template <typename T, typename Allocator>
    void vector<T, Allocator>::set_capacity(size_type n)
    {
        if((n == npos) || (n <= (size_type)(mpEnd - mpBegin))) // If new capacity <= size...
        {
            if(n < (size_type)(mpEnd - mpBegin))
                resize(n);

            this_type temp(*this);  // This is the simplest way to accomplish this, 
            swap(temp);             // and it is as efficient as any other.
        }
        else // Else new capacity > size.
        {
            pointer const pNewData = DoRealloc(n, mpBegin, mpEnd);
            DoDestroyValues(mpBegin, mpEnd);
            DoFree(mpBegin, (size_type)(mpCapacity - mpBegin));

            const ptrdiff_t nPrevSize = mpEnd - mpBegin;
            mpBegin    = pNewData;
            mpEnd      = pNewData + nPrevSize;
            mpCapacity = mpBegin + n;
        }
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::pointer
    vector<T, Allocator>::data()
    {
        return mpBegin;
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::const_pointer
    vector<T, Allocator>::data() const
    {
        return mpBegin;
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::reference
    vector<T, Allocator>::operator[](size_type n)
    {
#if EASTL_EMPTY_REFERENCE_ASSERT_ENABLED    // We allow the user to use a reference to v[0] of an empty container.
            if(EASTL_UNLIKELY((n != 0) && (n >= (static_cast<size_type>(mpEnd - mpBegin)))))
                EASTL_FAIL_MSG("vector::operator[] -- out of range");
#elif EASTL_ASSERT_ENABLED
            if(EASTL_UNLIKELY(n >= (static_cast<size_type>(mpEnd - mpBegin))))
                EASTL_FAIL_MSG("vector::operator[] -- out of range");
#endif

        return *(mpBegin + n);
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::const_reference
    vector<T, Allocator>::operator[](size_type n) const
    {
#if EASTL_EMPTY_REFERENCE_ASSERT_ENABLED    // We allow the user to use a reference to v[0] of an empty container.
            if(EASTL_UNLIKELY((n != 0) && (n >= (static_cast<size_type>(mpEnd - mpBegin)))))
                EASTL_FAIL_MSG("vector::operator[] -- out of range");
#elif EASTL_ASSERT_ENABLED
            if(EASTL_UNLIKELY(n >= (static_cast<size_type>(mpEnd - mpBegin))))
                EASTL_FAIL_MSG("vector::operator[] -- out of range");
#endif

        return *(mpBegin + n);
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::reference
    vector<T, Allocator>::at(size_type n)
    {
#if EASTL_EXCEPTIONS_ENABLED
            if(EASTL_UNLIKELY(n >= (static_cast<size_type>(mpEnd - mpBegin))))
                throw std::out_of_range("vector::at -- out of range");
#elif EASTL_ASSERT_ENABLED
            if(EASTL_UNLIKELY(n >= (static_cast<size_type>(mpEnd - mpBegin))))
                EASTL_FAIL_MSG("vector::at -- out of range");
#endif

        return *(mpBegin + n);
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::const_reference
    vector<T, Allocator>::at(size_type n) const
    {
#if EASTL_EXCEPTIONS_ENABLED
            if(EASTL_UNLIKELY(n >= (static_cast<size_type>(mpEnd - mpBegin))))
                throw std::out_of_range("vector::at -- out of range");
#elif EASTL_ASSERT_ENABLED
            if(EASTL_UNLIKELY(n >= (static_cast<size_type>(mpEnd - mpBegin))))
                EASTL_FAIL_MSG("vector::at -- out of range");
#endif

        return *(mpBegin + n);
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::reference
    vector<T, Allocator>::front()
    {
#if EASTL_EMPTY_REFERENCE_ASSERT_ENABLED
            // We allow the user to reference an empty container.
#elif EASTL_ASSERT_ENABLED
            if(EASTL_UNLIKELY(mpEnd <= mpBegin)) // We don't allow the user to reference an empty container.
                EASTL_FAIL_MSG("vector::front -- empty vector");
#endif

        return *mpBegin;
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::const_reference
    vector<T, Allocator>::front() const
    {
#if EASTL_EMPTY_REFERENCE_ASSERT_ENABLED
            // We allow the user to reference an empty container.
#elif EASTL_ASSERT_ENABLED
            if(EASTL_UNLIKELY(mpEnd <= mpBegin)) // We don't allow the user to reference an empty container.
                EASTL_FAIL_MSG("vector::front -- empty vector");
#endif

        return *mpBegin;
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::reference
    vector<T, Allocator>::back()
    {
#if EASTL_EMPTY_REFERENCE_ASSERT_ENABLED
            // We allow the user to reference an empty container.
#elif EASTL_ASSERT_ENABLED
            if(EASTL_UNLIKELY(mpEnd <= mpBegin)) // We don't allow the user to reference an empty container.
                EASTL_FAIL_MSG("vector::back -- empty vector");
#endif

        return *(mpEnd - 1);
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::const_reference
    vector<T, Allocator>::back() const
    {
#if EASTL_EMPTY_REFERENCE_ASSERT_ENABLED
            // We allow the user to reference an empty container.
#elif EASTL_ASSERT_ENABLED
            if(EASTL_UNLIKELY(mpEnd <= mpBegin)) // We don't allow the user to reference an empty container.
                EASTL_FAIL_MSG("vector::back -- empty vector");
#endif

        return *(mpEnd - 1);
    }


    template <typename T, typename Allocator>
    inline void vector<T, Allocator>::push_back(const value_type& value)
    {
        if(mpEnd < mpCapacity)
            ::new(mpEnd++) value_type(value);
        else
            DoInsertValue(mpEnd, value);
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::reference
    vector<T, Allocator>::push_back()
    {
        if(mpEnd < mpCapacity)
            ::new(mpEnd++) value_type();
        else // Note that in this case we create a temporary, which is less desirable.
            DoInsertValue(mpEnd, value_type());

        return *(mpEnd - 1); // Same as return back();
    }


    template <typename T, typename Allocator>
    inline void* vector<T, Allocator>::push_back_uninitialized()
    {
        if(mpEnd == mpCapacity)
        {
            const size_type newSize = (size_type)(mpEnd - mpBegin) + 1;
            reserve(newSize);
        }
 
        return mpEnd++;
    }


    template <typename T, typename Allocator>
    inline void vector<T, Allocator>::pop_back()
    {
#if EASTL_ASSERT_ENABLED
            if(EASTL_UNLIKELY(mpEnd <= mpBegin))
                EASTL_FAIL_MSG("vector::pop_back -- empty vector");
#endif

        --mpEnd;
        mpEnd->~value_type();
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::iterator
    vector<T, Allocator>::insert(iterator position, const value_type& value)
    {
#if EASTL_ASSERT_ENABLED
            if(EASTL_UNLIKELY((position < mpBegin) || (position > mpEnd)))
                EASTL_FAIL_MSG("vector::insert -- invalid position");
#endif

        const ptrdiff_t n = position - mpBegin; // Save this because we might reallocate.

        if((mpEnd == mpCapacity) || (position != mpEnd))
            DoInsertValue(position, value);
        else
            ::new(mpEnd++) value_type(value);

        return mpBegin + n;
    }


    template <typename T, typename Allocator>
    inline void vector<T, Allocator>::insert(iterator position, size_type n, const value_type& value)
    {
        DoInsertValues(position, n, value);
    }


    template <typename T, typename Allocator>
    template <typename InputIterator>
    inline void vector<T, Allocator>::insert(iterator position, InputIterator first, InputIterator last)
    {
        DoInsert(position, first, last, is_integral<InputIterator>());
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::iterator
    vector<T, Allocator>::erase(iterator position)
    {
#if EASTL_ASSERT_ENABLED
            if(EASTL_UNLIKELY((position < mpBegin) || (position >= mpEnd)))
                EASTL_FAIL_MSG("vector::erase -- invalid position");
#endif

        if((position + 1) < mpEnd)
            eastl::copy(position + 1, mpEnd, position);
        --mpEnd;
        mpEnd->~value_type();
        return position;
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::iterator
    vector<T, Allocator>::erase(iterator first, iterator last)
    {
#if EASTL_ASSERT_ENABLED
            if(EASTL_UNLIKELY((first < mpBegin) || (first > mpEnd) || (last < mpBegin) || (last > mpEnd) || (last < first)))
                EASTL_FAIL_MSG("vector::erase -- invalid position");
#endif
 
        //#if 0 
            // Reference implementation, known to be correct:
            iterator const position = eastl::copy(last, mpEnd, first);
            DoDestroyValues(position, mpEnd);
            mpEnd -= (last - first);
        //#else 
        //    To do: Test this.
        //    // Implementation that has an optimization for memcpy which eastl::copy cannot do (the best it can do is memmove).
        //    iterator position;
        //    T* const pEnd = mpEnd - (last - first);
        //
        //    if((pEnd <= last) && eastl::has_trivial_assign<value_type>::value) // If doing a non-overlapping copy and the data is memcpy-able
        //    {
        //        const size_t size = (size_t)((uintptr_t)mpEnd-(uintptr_t)last);
        //        position = (T*)((uintptr_t)memcpy(first, last, size) + size);
        //    }
        //    else
        //        position = eastl::copy(last, mpEnd, first);
        //
        //    DoDestroyValues(position, mpEnd);
        //    mpEnd = pEnd;
        //#endif
 
        return first;
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::reverse_iterator
    vector<T, Allocator>::erase(reverse_iterator position)
    {
        return reverse_iterator(erase((++position).base()));
    }


    template <typename T, typename Allocator>
    inline typename vector<T, Allocator>::reverse_iterator
    vector<T, Allocator>::erase(reverse_iterator first, reverse_iterator last)
    {
        // Version which erases in order from first to last.
        // difference_type i(first.base() - last.base());
        // while(i--)
        //     first = erase(first);
        // return first;

        // Version which erases in order from last to first, but is slightly more efficient:
        return reverse_iterator(erase((++last).base(), (++first).base()));
    }


    template <typename T, typename Allocator>
    inline void vector<T, Allocator>::clear()
    {
        DoDestroyValues(mpBegin, mpEnd);
        mpEnd = mpBegin;
    }


    template <typename T, typename Allocator>
    inline void vector<T, Allocator>::reset()
    {
        // The reset function is a special extension function which unilaterally 
        // resets the container to an empty state without freeing the memory of 
        // the contained objects. This is useful for very quickly tearing down a 
        // container built into scratch memory.
        mpBegin = mpEnd = mpCapacity = NULL;
    }


    template <typename T, typename Allocator>
    inline void vector<T, Allocator>::swap(this_type& x)
    {
        if(mAllocator == x.mAllocator) // If allocators are equivalent...
        {
            // We leave mAllocator as-is.
            eastl::swap(mpBegin,     x.mpBegin);
            eastl::swap(mpEnd,       x.mpEnd);
            eastl::swap(mpCapacity,  x.mpCapacity);
        }
        else // else swap the contents.
        {
            const this_type temp(*this); // Can't call eastl::swap because that would
            *this = x;                   // itself call this member swap function.
            x     = temp;
        }
    }


    template <typename T, typename Allocator>
    template <typename ForwardIterator>
    inline typename vector<T, Allocator>::pointer
    vector<T, Allocator>::DoRealloc(size_type n, ForwardIterator first, ForwardIterator last)
    {
        T* const p = DoAllocate(n);
        eastl::uninitialized_copy_ptr(first, last, p);
        return p;
    }


    template <typename T, typename Allocator>
    template <typename Integer>
    inline void vector<T, Allocator>::DoInit(Integer n, Integer value, true_type)
    {
        mpBegin    = DoAllocate((size_type)n);
        mpCapacity = mpBegin + n;
        mpEnd      = mpCapacity;
        eastl::uninitialized_fill_n_ptr<value_type, Integer>(mpBegin, n, value);
    }


    template <typename T, typename Allocator>
    template <typename InputIterator>
    inline void vector<T, Allocator>::DoInit(InputIterator first, InputIterator last, false_type)
    {
        typedef typename eastl::iterator_traits<InputIterator>:: iterator_category IC;
        DoInitFromIterator(first, last, IC());
    }


    template <typename T, typename Allocator>
    template <typename InputIterator>
    inline void vector<T, Allocator>::DoInitFromIterator(InputIterator first, InputIterator last, EASTL_ITC_NS::input_iterator_tag)
    {
        for(; first < last; ++first)  // InputIterators by definition actually only allow you to iterate through them once.
            push_back(*first);        // Thus the standard *requires* that we do this (inefficient) implementation.
    }                                 // Luckily, InputIterators are in practice almost never used, so this code will likely never get executed.


    template <typename T, typename Allocator>
    template <typename ForwardIterator>
    inline void vector<T, Allocator>::DoInitFromIterator(ForwardIterator first, ForwardIterator last, EASTL_ITC_NS::forward_iterator_tag)
    {
        const size_type n = (size_type)eastl::distance(first, last);
        mpBegin    = DoAllocate(n);
        mpCapacity = mpBegin + n;
        mpEnd      = mpCapacity;
        eastl::uninitialized_copy_ptr(first, last, mpBegin);
    }


    template <typename T, typename Allocator>
    inline void vector<T, Allocator>::DoDestroyValues(pointer first, pointer last)
    {
        for(; first < last; ++first) // In theory, this could be an external function that works on an iterator.
            first->~value_type();
    }


    template <typename T, typename Allocator>
    template <typename Integer>
    inline void vector<T, Allocator>::DoAssign(Integer n, Integer value, true_type)
    {
        DoAssignValues(static_cast<size_type>(n), static_cast<value_type>(value));
    }


    template <typename T, typename Allocator>
    template <typename InputIterator>
    inline void vector<T, Allocator>::DoAssign(InputIterator first, InputIterator last, false_type)
    {
        typedef typename eastl::iterator_traits<InputIterator>::iterator_category IC;
        DoAssignFromIterator(first, last, IC());
    }


    template <typename T, typename Allocator>
    void vector<T, Allocator>::DoAssignValues(size_type n, const value_type& value)
    {
        if(n > size_type(mpCapacity - mpBegin)) // If n > capacity ...
        {
            this_type temp(n, value, mAllocator); // We have little choice but to reallocate with new memory.
            swap(temp);
        }
        else if(n > size_type(mpEnd - mpBegin)) // If n > size ...
        {
            eastl::fill(mpBegin, mpEnd, value);
            eastl::uninitialized_fill_n_ptr(mpEnd, n - size_type(mpEnd - mpBegin), value);
            mpEnd += n - size_type(mpEnd - mpBegin);
        }
        else // else 0 <= n <= size
        {
            eastl::fill_n(mpBegin, n, value);
            erase(mpBegin + n, mpEnd);
        }
    }


    template <typename T, typename Allocator>
    template <typename InputIterator>
    void vector<T, Allocator>::DoAssignFromIterator(InputIterator first, InputIterator last, EASTL_ITC_NS::input_iterator_tag)
    {
        iterator position(mpBegin);

        while((position != mpEnd) && (first != last))
        {
            *position = *first;
            ++first;
            ++position;
        }
        if(first == last)
            erase(position, mpEnd);
        else
            insert(mpEnd, first, last);
    }


    template <typename T, typename Allocator>
    template <typename RandomAccessIterator>
    void vector<T, Allocator>::DoAssignFromIterator(RandomAccessIterator first, RandomAccessIterator last, EASTL_ITC_NS::random_access_iterator_tag)
    {
        const size_type n = (size_type)eastl::distance(first, last);

        if(n > size_type(mpCapacity - mpBegin)) // If n > capacity ...
        {
            pointer const pNewData = DoRealloc(n, first, last);
            DoDestroyValues(mpBegin, mpEnd);
            DoFree(mpBegin, (size_type)(mpCapacity - mpBegin));

            mpBegin    = pNewData;
            mpEnd      = mpBegin + n;
            mpCapacity = mpEnd;
        }
        else if(n <= size_type(mpEnd - mpBegin)) // If n <= size ...
        {
            pointer const pNewEnd = eastl::copy(first, last, mpBegin); // Since we are copying to mpBegin, we don't have to worry about needing copy_backward or a memmove-like copy (as opposed to memcpy-like copy).
            DoDestroyValues(pNewEnd, mpEnd);
            mpEnd = pNewEnd;
        }
        else // else size < n <= capacity
        {
            RandomAccessIterator position = first + (mpEnd - mpBegin);
            eastl::copy(first, position, mpBegin); // Since we are copying to mpBegin, we don't have to worry about needing copy_backward or a memmove-like copy (as opposed to memcpy-like copy).
            mpEnd = eastl::uninitialized_copy_ptr(position, last, mpEnd);
        }
    }


    template <typename T, typename Allocator>
    template <typename Integer>
    inline void vector<T, Allocator>::DoInsert(iterator position, Integer n, Integer value, true_type)
    {
        DoInsertValues(position, static_cast<size_type>(n), static_cast<value_type>(value));
    }


    template <typename T, typename Allocator>
    template <typename InputIterator>
    inline void vector<T, Allocator>::DoInsert(iterator position, InputIterator first, InputIterator last, false_type)
    {
        typedef typename eastl::iterator_traits<InputIterator>::iterator_category IC;
        DoInsertFromIterator(position, first, last, IC());
    }


    template <typename T, typename Allocator>
    template <typename InputIterator>
    inline void vector<T, Allocator>::DoInsertFromIterator(iterator position, InputIterator first, InputIterator last, EASTL_ITC_NS::input_iterator_tag)
    {
        for(; first != last; ++first, ++position)
            position = insert(position, *first);
    }


    template <typename T, typename Allocator>
    template <typename BidirectionalIterator>
    void vector<T, Allocator>::DoInsertFromIterator(iterator position, BidirectionalIterator first, BidirectionalIterator last, EASTL_ITC_NS::bidirectional_iterator_tag)
    {
#if EASTL_ASSERT_ENABLED
            if(EASTL_UNLIKELY((position < mpBegin) || (position > mpEnd)))
                EASTL_FAIL_MSG("vector::insert -- invalid position");
#endif

        if(first != last)
        {
            const size_type n = (size_type)eastl::distance(first, last);

            if(n <= size_type(mpCapacity - mpEnd)) // If n fits within the existing capacity...
            {
                const size_type nExtra = static_cast<size_type>(mpEnd - position);
                const pointer   pEnd   = mpEnd;

                if(n < nExtra)
                {
                    eastl::uninitialized_copy_ptr(mpEnd - n, mpEnd, mpEnd);
                    mpEnd += n;
                    eastl::copy_backward(position, pEnd - n, pEnd); // We need copy_backward because of potential overlap issues.
                    eastl::copy(first, last, position);
                }
                else
                {
                    BidirectionalIterator fiTemp = first;
                    eastl::advance(fiTemp, nExtra);
                    eastl::uninitialized_copy_ptr(fiTemp, last, mpEnd);
                    mpEnd += n - nExtra;
                    eastl::uninitialized_copy_ptr(position, pEnd, mpEnd);
                    mpEnd += nExtra;
                    eastl::copy_backward(first, fiTemp, position + nExtra);
                }
            }
            else // else we need to expand our capacity.
            {
                const size_type nPrevSize = size_type(mpEnd - mpBegin);
                const size_type nGrowSize = GetNewCapacity(nPrevSize);
                const size_type nNewSize  = nGrowSize > (nPrevSize + n) ? nGrowSize : (nPrevSize + n);
                pointer const   pNewData  = DoAllocate(nNewSize);

#if EASTL_EXCEPTIONS_ENABLED
                    pointer pNewEnd = pNewData;
                    try
                    {
                        pNewEnd = eastl::uninitialized_copy_ptr(mpBegin, position, pNewData);
                        pNewEnd = eastl::uninitialized_copy_ptr(first, last, pNewEnd);
                        pNewEnd = eastl::uninitialized_copy_ptr(position, mpEnd, pNewEnd);
                    }
                    catch(...)
                    {
                        DoDestroyValues(pNewData, pNewEnd);
                        DoFree(pNewData, nNewSize);
                        throw;
                    }
#else
                    pointer pNewEnd = eastl::uninitialized_copy_ptr(mpBegin, position, pNewData);
                    pNewEnd         = eastl::uninitialized_copy_ptr(first, last, pNewEnd);
                    pNewEnd         = eastl::uninitialized_copy_ptr(position, mpEnd, pNewEnd);
#endif

                DoDestroyValues(mpBegin, mpEnd);
                DoFree(mpBegin, (size_type)(mpCapacity - mpBegin));

                mpBegin    = pNewData;
                mpEnd      = pNewEnd;
                mpCapacity = pNewData + nNewSize;
            }
        }
    }


    template <typename T, typename Allocator>
    void vector<T, Allocator>::DoInsertValues(iterator position, size_type n, const value_type& value)
    {
#if EASTL_ASSERT_ENABLED
            if(EASTL_UNLIKELY((position < mpBegin) || (position > mpEnd)))
                EASTL_FAIL_MSG("vector::insert -- invalid position");
#endif

        if(n <= size_type(mpCapacity - mpEnd)) // If n is <= capacity...
        {
            if(n > 0) // To do: See if there is a way we can eliminate this 'if' statement.
            {
                // To consider: Make this algorithm work more like DoInsertValue whereby a pointer to value is used.
                const value_type temp  = value;
                const size_type nExtra = static_cast<size_type>(mpEnd - position);
                const pointer pEnd     = mpEnd;

                if(n < nExtra)
                {
                    eastl::uninitialized_copy_ptr(mpEnd - n, mpEnd, mpEnd);
                    mpEnd += n;
                    eastl::copy_backward(position, pEnd - n, pEnd); // We need copy_backward because of potential overlap issues.
                    eastl::fill(position, position + n, temp);
                }
                else
                {
                    eastl::uninitialized_fill_n_ptr(mpEnd, n - nExtra, temp);
                    mpEnd += n - nExtra;
                    eastl::uninitialized_copy_ptr(position, pEnd, mpEnd);
                    mpEnd += nExtra;
                    eastl::fill(position, pEnd, temp);
                }
            }
        }
        else // else n > capacity
        {
            const size_type nPrevSize = size_type(mpEnd - mpBegin);
            const size_type nGrowSize = GetNewCapacity(nPrevSize);
            const size_type nNewSize  = nGrowSize > (nPrevSize + n) ? nGrowSize : (nPrevSize + n);
            pointer const pNewData    = DoAllocate(nNewSize);

#if EASTL_EXCEPTIONS_ENABLED
                pointer pNewEnd = pNewData;
                try
                {
                    pNewEnd = eastl::uninitialized_copy_ptr(mpBegin, position, pNewData);
                    eastl::uninitialized_fill_n_ptr(pNewEnd, n, value);
                    pNewEnd = eastl::uninitialized_copy_ptr(position, mpEnd, pNewEnd + n);
                }
                catch(...)
                {
                    DoDestroyValues(pNewData, pNewEnd);
                    DoFree(pNewData, nNewSize);
                    throw;
                }
#else
                pointer pNewEnd = eastl::uninitialized_copy_ptr(mpBegin, position, pNewData);
                eastl::uninitialized_fill_n_ptr(pNewEnd, n, value);
                pNewEnd = eastl::uninitialized_copy_ptr(position, mpEnd, pNewEnd + n);
#endif

            DoDestroyValues(mpBegin, mpEnd);
            DoFree(mpBegin, (size_type)(mpCapacity - mpBegin));

            mpBegin    = pNewData;
            mpEnd      = pNewEnd;
            mpCapacity = pNewData + nNewSize;
        }
    }


    template <typename T, typename Allocator>
    void vector<T, Allocator>::DoInsertValue(iterator position, const value_type& value)
    {
#if EASTL_ASSERT_ENABLED
            if(EASTL_UNLIKELY((position < mpBegin) || (position > mpEnd)))
                EASTL_FAIL_MSG("vector::insert -- invalid position");
#endif

        if(mpEnd != mpCapacity) // If size < capacity ...
        {
            // EASTL_ASSERT(position < mpEnd); // We don't call this function unless position is less than end, and the code directly below relies on this.
            // We need to take into account the possibility that value may come from within the vector itself.
            const T* pValue = &value;
            if((pValue >= position) && (pValue < mpEnd)) // If value comes from within the range to be moved...
                ++pValue;
            ::new(mpEnd) value_type(*(mpEnd - 1));
            eastl::copy_backward(position, mpEnd - 1, mpEnd); // We need copy_backward because of potential overlap issues.
            *position = *pValue;
            ++mpEnd;
        }
        else // else (size == capacity)
        {
            const size_type nPrevSize = size_type(mpEnd - mpBegin);
            const size_type nNewSize  = GetNewCapacity(nPrevSize);
            pointer const   pNewData  = DoAllocate(nNewSize);

#if EASTL_EXCEPTIONS_ENABLED
                pointer pNewEnd = pNewData;
                try
                {
                    pNewEnd = eastl::uninitialized_copy_ptr(mpBegin, position, pNewData);
                    ::new(pNewEnd) value_type(value);
                    pNewEnd = eastl::uninitialized_copy_ptr(position, mpEnd, ++pNewEnd);
                }
                catch(...)
                {
                    DoDestroyValues(pNewData, pNewEnd);
                    DoFree(pNewData, nNewSize);
                    throw;
                }
#else
                pointer pNewEnd = eastl::uninitialized_copy_ptr(mpBegin, position, pNewData);
                ::new(pNewEnd) value_type(value);
                pNewEnd = eastl::uninitialized_copy_ptr(position, mpEnd, ++pNewEnd);
#endif

            DoDestroyValues(mpBegin, mpEnd);
            DoFree(mpBegin, (size_type)(mpCapacity - mpBegin));

            mpBegin    = pNewData;
            mpEnd      = pNewEnd;
            mpCapacity = pNewData + nNewSize;
        }
    }


    template <typename T, typename Allocator>
    inline bool vector<T, Allocator>::validate() const
    {
        if(mpEnd < mpBegin)
            return false;
        if(mpCapacity < mpEnd)
            return false;
        return true;
    }


    template <typename T, typename Allocator>
    inline int vector<T, Allocator>::validate_iterator(const_iterator i) const
    {
        if(i >= mpBegin)
        {
            if(i < mpEnd)
                return (isf_valid | isf_current | isf_can_dereference);

            if(i <= mpEnd)
                return (isf_valid | isf_current);
        }

        return isf_none;
    }



    ///////////////////////////////////////////////////////////////////////
    // global operators
    ///////////////////////////////////////////////////////////////////////

    template <typename T, typename Allocator>
    inline bool operator==(const vector<T, Allocator>& a, const vector<T, Allocator>& b)
    {
        return ((a.size() == b.size()) && equal(a.begin(), a.end(), b.begin()));
    }


    template <typename T, typename Allocator>
    inline bool operator!=(const vector<T, Allocator>& a, const vector<T, Allocator>& b)
    {
        return ((a.size() != b.size()) || !equal(a.begin(), a.end(), b.begin()));
    }


    template <typename T, typename Allocator>
    inline bool operator<(const vector<T, Allocator>& a, const vector<T, Allocator>& b)
    {
        return lexicographical_compare(a.begin(), a.end(), b.begin(), b.end());
    }


    template <typename T, typename Allocator>
    inline bool operator>(const vector<T, Allocator>& a, const vector<T, Allocator>& b)
    {
        return b < a;
    }


    template <typename T, typename Allocator>
    inline bool operator<=(const vector<T, Allocator>& a, const vector<T, Allocator>& b)
    {
        return !(b < a);
    }


    template <typename T, typename Allocator>
    inline bool operator>=(const vector<T, Allocator>& a, const vector<T, Allocator>& b)
    {
        return !(a < b);
    }


    template <typename T, typename Allocator>
    inline void swap(vector<T, Allocator>& a, vector<T, Allocator>& b)
    {
        a.swap(b);
    }


} // namespace eastl


#ifdef _MSC_VER
#  pragma warning(pop)
#endif


#endif // Header include guard