sources/list.h

/*
	Copyright 2014 Teemu Piippo
	All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions
	are met:

	1. Redistributions of source code must retain the above copyright
	   notice, this list of conditions and the following disclaimer.
	2. Redistributions in binary form must reproduce the above copyright
	   notice, this list of conditions and the following disclaimer in the
	   documentation and/or other materials provided with the distribution.
	3. Neither the name of the copyright holder nor the names of its
	   contributors may be used to endorse or promote products derived from
	   this software without specific prior written permission.

	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
	TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
	PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
	OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
	LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
	NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#pragma once
#include "basics.h"
#include <algorithm>
#include <deque>
#include <initializer_list>
#include <functional>
#include <cassert>
#include "range.h"

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
class Container
{
public:
	using Iterator = typename C::iterator;
	using ConstIterator = typename C::const_iterator;
	using ReverseIterator = typename C::reverse_iterator;
	using ConstReverseIterator = typename C::const_reverse_iterator;
	using Self = Container<T, C>;

	Container();
	Container (int numvalues);
	Container (const C& a);
	Container (std::initializer_list<T>&& a);

	auto append (const T& value) -> T&;
	auto begin() -> Iterator;
	auto begin() const -> ConstIterator;
	auto clear() -> void;
	auto contains (const T& a) const -> bool;
	auto crbegin() const -> ConstReverseIterator;
	auto crend() const -> ConstReverseIterator;
	auto container() const -> const C&;
	auto end() -> Iterator;
	auto end() const -> ConstIterator;
	auto find (const T& needle) -> Iterator;
	auto find (const T& needle) const -> ConstIterator;
	auto find (Function<bool (T const&)> func) -> Iterator;
	auto find (Function<bool (T const&)> func) const -> ConstIterator;
	auto first() const -> const T&;
	auto insert (int pos, const T& value) -> void;
	auto is_empty() const -> bool;
	auto last() const -> const T&;
	auto merge (const Self& other) -> void;
	auto pop (T& val) -> bool;
	auto prepend (const T& value) -> T&;
	auto rbegin() -> ReverseIterator;
	auto remove_at (int pos) -> void;
	auto remove_duplicates() -> void;
	auto remove_one (const T& it) -> void;
	auto rend() -> ReverseIterator;
	auto resize (int size) -> void;
	auto reverse() const -> Self;
	auto size() const -> int;
	auto sort() -> void;
	auto splice (int a, int b) const -> Self;
	auto splice (const Range<int>& a) const -> Self;

	auto operator<< (const T& value) -> Self&;
	auto operator<< (const Self& vals) -> Self&;
	auto operator[] (int n) -> T&;
	auto operator[] (int n) const -> const T&;
	auto operator[] (Range<int> const& n) const -> Self;
	auto operator+ (const Self& other) const -> Self;

protected:
	C m_container;
};

template<typename T, typename C>
Container<T, C>& operator>> (const T& value, Container<T, C>& haystack);

template<typename T>
using List = Container<T, std::deque<T>>;

template<typename T>
class Vector : public Container<T, std::vector<T>>
{
public:
	using Super = Container<T, std::vector<T>>;

	template<typename... Args>
	Vector (Args ...args) :
		Super (args...) {}

	auto data() -> T*
	{
		return Super::m_container.data();
	}

	auto data() const -> const T*
	{
		return Super::m_container.data();
	}

	operator const T*() const
	{
		return data();
	}
};

//
// -------------------------------------------------------------------------------------------------
//
// IMPLEMENTATIONS
//

template<typename T, typename C>
Container<T, C>::Container() {}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
Container<T, C>::Container (const C& other) :
	m_container (other) {}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
Container<T, C>::Container (std::initializer_list<T> && a) :
	m_container (a) {}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
Container<T, C>::Container (int numvalues) :
	m_container (numvalues) {}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::begin() -> Iterator
{
	return m_container.begin();
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::begin() const -> ConstIterator
{
	return m_container.cbegin();
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::end() -> Iterator
{
	return m_container.end();
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::end() const -> ConstIterator
{
	return m_container.cend();
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::rbegin() -> ReverseIterator
{
	return m_container.rbegin();
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::crbegin() const -> ConstReverseIterator
{
	return m_container.crbegin();
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::rend() -> ReverseIterator
{
	return m_container.rend();
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::crend() const -> ConstReverseIterator
{
	return m_container.crend();
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::remove_at (int pos) -> void
{
	assert (pos < size());
	m_container.erase (m_container.begin() + pos);
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::prepend (const T& value) -> T&
{
	m_container.push_front (value);
	return m_container[0];
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::append (const T& value) -> T&
{
	m_container.push_back (value);
	return m_container[m_container.size() - 1];
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::merge (const Self& other) -> void
{
	int oldsize = size();
	resize (size() + other.size());
	std::copy (other.begin(), other.end(), begin() + oldsize);
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::pop (T& val) -> bool
{
	if (is_empty())
		return false;

	val = m_container[size() - 1];
	m_container.erase (m_container.end() - 1);
	return true;
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::operator<< (const T& value) -> Self&
{
	append (value);
	return *this;
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::operator<< (const Self& vals) -> Self&
{
	merge (vals);
	return *this;
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::reverse() const -> Self
{
	Self rev;
	std::copy (rbegin(), rend(), rev.begin());
	return rev;
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::clear() -> void
{
	m_container.clear();
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::insert (int pos, const T& value) -> void
{
	m_container.insert (m_container.begin() + pos, value);
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::remove_duplicates() -> void
{
	sort();
	resize (std::distance (begin(), std::unique (begin(), end())));
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::size() const -> int
{
	return m_container.size();
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::operator[] (int n) -> T&
{
	assert (n < size());
	return m_container[n];
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::operator[] (int n) const -> const T&
{
	assert (n < size());
	return m_container[n];
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::operator[] (const Range<int>& n) const -> Self
{
	return splice (n);
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::resize (int size) -> void
{
	m_container.resize (size);
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::sort() -> void
{
	std::sort (begin(), end());
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::find (const T& needle) -> Iterator
{
	auto it = std::find (m_container.begin(), m_container.end(), needle);

	if (it == m_container.end())
		return end();

	return it;
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::find (const T& needle) const -> ConstIterator
{
	auto it = std::find (m_container.cbegin(), m_container.cend(), needle);

	if (it == m_container.cend())
		return end();

	return it;
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::find (Function<bool (T const&)> func) -> Iterator
{
	for (Iterator it = begin(); it != end(); ++it)
	{
		if (func (*it))
			return it;
	}

	return end();
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::find (Function<bool (T const&)> func) const -> ConstIterator
{
	for (ConstIterator it = begin(); it != end(); ++it)
	{
		if (func (*it))
			return it;
	}

	return end();
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::remove_one (const T& a) -> void
{
	auto it = std::find (m_container.begin(), m_container.end(), a);

	if (it != m_container.end())
		m_container.erase (it);
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::is_empty() const -> bool
{
	return size() == 0;
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::splice (int a, int b) const -> Self
{
	if (a < 0 or b >= size() or b < a)
		return Self();

	Self result;

	for (int i = a; i <= b; ++i)
		result << operator[] (i);

	return result;
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::splice (const Range<int>& a) const -> Self
{
	return splice (a.min(), a.max());
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::container() const -> const C&
{
	return m_container;
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::first() const -> const T&
{
	return *m_container.cbegin();
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::last() const -> const T&
{
	return *(m_container.cend() - 1);
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::contains (const T& a) const -> bool
{
	return std::find (m_container.cbegin(), m_container.cend(), a) != m_container.end();
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto Container<T, C>::operator+ (const Self& other) const -> Self
{
	Self out (*this);
	out.merge (other);
	return out;
}

//
// -------------------------------------------------------------------------------------------------
//

template<typename T, typename C>
auto operator>> (const T& value, Container<T, C>& haystack) -> Container<T, C>&
{
	haystack.prepend (value);
	return haystack;
}