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/*
* Copyright (C) 2005-2018 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#pragma once
/**
* This file contains a few templates to define various length
* Tuples.
*/
namespace XBMCAddon
{
struct tuple_null_type { };
class TupleBase
{
protected:
int numValuesSet;
explicit inline TupleBase(int pnumValuesSet) : numValuesSet(pnumValuesSet) {}
inline void nvs(int newSize) { if(numValuesSet < newSize) numValuesSet = newSize; }
public:
inline int GetNumValuesSet() const { return numValuesSet; }
};
// stub type template to be partial specialized
template<typename T1 = tuple_null_type, typename T2 = tuple_null_type,
typename T3 = tuple_null_type, typename T4 = tuple_null_type,
typename Extraneous = tuple_null_type> class Tuple {};
// Tuple that holds a single value
template<typename T1> class Tuple<T1, tuple_null_type, tuple_null_type, tuple_null_type, tuple_null_type> : public TupleBase
{
private:
T1 v1;
public:
explicit inline Tuple(T1 p1) : TupleBase(1), v1(p1) {}
inline Tuple() : TupleBase(0) {}
inline Tuple(const Tuple<T1>& o) : TupleBase(o), v1(o.v1) {}
Tuple<T1>& operator=(const Tuple<T1>& other) = default;
inline T1& first() { TupleBase::nvs(1); return v1; }
inline const T1& first() const { return v1; }
};
// Tuple that holds two values
template<typename T1, typename T2> class Tuple<T1, T2, tuple_null_type, tuple_null_type, tuple_null_type> : public Tuple<T1>
{
protected:
T2 v2;
public:
inline Tuple(T1 p1, T2 p2) : Tuple<T1>(p1), v2(p2) { TupleBase::nvs(2); }
explicit inline Tuple(T1 p1) : Tuple<T1>(p1) {}
inline Tuple() = default;
Tuple<T1, T2>& operator=(const Tuple<T1, T2>& other) = default;
inline Tuple(const Tuple<T1,T2>& o) : Tuple<T1>(o), v2(o.v2) {}
inline T2& second() { TupleBase::nvs(2); return v2; }
inline const T2& second() const { return v2; }
};
// Tuple that holds three values
template<typename T1, typename T2, typename T3> class Tuple<T1, T2, T3, tuple_null_type, tuple_null_type> : public Tuple<T1,T2>
{
private:
T3 v3;
public:
inline Tuple(T1 p1, T2 p2, T3 p3) : Tuple<T1,T2>(p1,p2), v3(p3) { TupleBase::nvs(3); }
inline Tuple(T1 p1, T2 p2) : Tuple<T1,T2>(p1,p2) {}
explicit inline Tuple(T1 p1) : Tuple<T1,T2>(p1) {}
inline Tuple() = default;
inline Tuple(const Tuple<T1,T2,T3>& o) : Tuple<T1,T2>(o), v3(o.v3) {}
inline T3& third() { TupleBase::nvs(3); return v3; }
inline const T3& third() const { return v3; }
};
// Tuple that holds four values
template<typename T1, typename T2, typename T3, typename T4> class Tuple<T1, T2, T3, T4, tuple_null_type> : public Tuple<T1,T2,T3>
{
private:
T4 v4;
public:
inline Tuple(T1 p1, T2 p2, T3 p3, T4 p4) : Tuple<T1,T2,T3>(p1,p2,p3), v4(p4) { TupleBase::nvs(4); }
inline Tuple(T1 p1, T2 p2, T3 p3) : Tuple<T1,T2,T3>(p1,p2,p3) {}
inline Tuple(T1 p1, T2 p2) : Tuple<T1,T2,T3>(p1,p2) {}
explicit inline Tuple(T1 p1) : Tuple<T1,T2,T3>(p1) {}
inline Tuple() = default;
inline Tuple(const Tuple<T1,T2,T3,T4>& o) : Tuple<T1,T2,T3>(o), v4(o.v4) {}
inline T4& fourth() { TupleBase::nvs(4); return v4; }
inline const T4& fourth() const { return v4; }
};
}
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