mirror of
https://github.com/ONLYOFFICE/core.git
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f15d849e17
git-svn-id: svn://fileserver/activex/AVS/Sources/TeamlabOffice/trunk/ServerComponents@52999 954022d7-b5bf-4e40-9824-e11837661b57
251 lines
7.7 KiB
C++
251 lines
7.7 KiB
C++
#pragma once
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#ifndef UTILITY_NULLABLE_INCLUDE_H_
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#define UTILITY_NULLABLE_INCLUDE_H_
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#include <string>
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#include "CallTraits.h"
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#include "Exception/not_init_nullable.h"
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#include "../../../../Common/DocxFormat/Source/Base/SmartPtr.h"
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// TODO: nullable__ change to NSCommon::smart_ptr
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template<typename T> class nullable__
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{
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private:
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typedef typename NSCallTraits<T>::param_type Parameter;
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private:
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template<class T, bool big_type> class InternalNullable
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{
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private:
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typedef typename NSCallTraits<T>::param_type Parameter;
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public:
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InternalNullable() {}
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InternalNullable(Parameter value) : _value(new T(value)) {}
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inline void operator =(Parameter value) { _value.reset(new T(value));}
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inline void operator =(const nullable__<T>& value)
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{
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if (value.is_init())
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_value.reset(new T(value));
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else
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_value = NSCommon::smart_ptr<T>();
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}
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inline Parameter get() const {return *_value;}
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inline Parameter get_value_or(Parameter value) const {return is_init() ? get() : value;}
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inline T const* get_ptr() const {return _value.operator->();}
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inline T* get_ptr() {return _value.operator->();}
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inline T const* operator->() const {return _value.operator->();}
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inline T* operator->() {return _value.operator->();}
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inline const T& operator*() const {return (_value.operator*());}
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inline T& operator*() {return (_value.operator*());}
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inline const bool is_init() const {return _value.is_init();}
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inline void reset() {_value.reset();}
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private:
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NSCommon::smart_ptr<T> _value;
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};
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template<class T> class InternalNullable<T, false>
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{
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private:
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typedef typename NSCallTraits<T>::param_type Parameter;
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public:
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InternalNullable() {}
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InternalNullable(Parameter value) : _value(new T(value)) {}
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inline void operator =(Parameter value) {_value = value;}
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inline void operator =(const nullable__<T>& value)
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{
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if (value.is_init())
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_value.reset(new T(value));
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else
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_value = NSCommon::smart_ptr<T>();
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}
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inline Parameter get() const {return *_value;}
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inline Parameter get_value_or(Parameter value) const {return is_init() ? get() : value;}
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inline T const* get_ptr() const {return _value.operator->();}
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inline T* get_ptr() {return _value.operator->();}
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inline T const* operator->() const {return _value.operator->();}
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inline T* operator->() {return _value.operator->();}
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inline const T& operator*() const {return (_value.operator*());}
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inline T& operator*() {return (_value.operator*());}
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inline const bool is_init() const {return _value.is_init();}
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inline void reset() {_value.reset();}
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private:
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NSCommon::smart_ptr<T> _value;
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};
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public:
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nullable__() {}
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nullable__(Parameter value) : _value(value) {}
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template<typename U>
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const nullable__<T>& operator =(const U& value)
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{
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return ::nullable_setter(*this, value);
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}
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template<typename U>
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const nullable__<T>& nullable_setter(const U& value)
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{
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_value = static_cast<T>(value);
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return *this;
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}
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inline const nullable__<T>& nullable_setter(const nullable__<T>& value)
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{
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_value = value;
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return *this;
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}
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inline operator Parameter() const {return _value.get();}
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inline Parameter get() const
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{
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if (!is_init())
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throw not_init_nullable();
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return _value.get();
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}
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inline Parameter get_value_or(Parameter value) const
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{
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return _value.get_value_or(value);
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}
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inline const T get_value_or_default() const
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{
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return get_value_or(T());
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}
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inline T const* operator->() const
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{
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if (!is_init())
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throw not_init_nullable();
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return _value.get_ptr();
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}
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inline T* operator->()
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{
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if (!is_init())
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throw not_init_nullable();
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return _value.get_ptr();
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}
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inline T const* get_ptr() const
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{
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if (!is_init())
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throw not_init_nullable();
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return _value.get_ptr();
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}
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inline T* get_ptr()
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{
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if (!is_init())
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throw not_init_nullable();
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return _value.get_ptr();
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}
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inline T const& operator*() const
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{
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if (!is_init())
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throw not_init_nullable();
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return *_value;
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}
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inline T& operator*()
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{
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if (!is_init())
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throw not_init_nullable();
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return *_value;
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}
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inline const bool is_init() const
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{
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return _value.is_init();
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}
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inline void reset()
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{
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_value.reset();
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}
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inline void init()
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{
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if (!is_init())
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_value = T();
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}
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inline const std::string ToString() const
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{
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return ::ToString(get());
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}
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inline const bool operator ==(nullable__<T> const& rhs) const {return _value.get() == rhs._value.get();}
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inline const bool operator !=(nullable__<T> const& rhs) const {return _value.get() != rhs._value.get();}
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inline const bool operator < (nullable__<T> const& rhs) const {return _value.get() < rhs._value.get();}
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inline const bool operator > (nullable__<T> const& rhs) const {return _value.get() > rhs._value.get();}
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inline const bool operator <=(nullable__<T> const& rhs) const {return _value.get() <= rhs._value.get();}
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inline const bool operator >=(nullable__<T> const& rhs) const {return _value.get() >= rhs._value.get();}
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inline const bool operator ==(Parameter rhs) const {return _value.get() == rhs;}
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inline const bool operator !=(Parameter rhs) const {return _value.get() != rhs;}
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inline const bool operator < (Parameter rhs) const {return _value.get() < rhs;}
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inline const bool operator > (Parameter rhs) const {return _value.get() > rhs;}
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inline const bool operator <=(Parameter rhs) const {return _value.get() <= rhs;}
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inline const bool operator >=(Parameter rhs) const {return _value.get() >= rhs;}
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template<typename T> const bool operator ==(const T rhs) const {return _value.get() == rhs;}
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template<typename T> const bool operator !=(const T rhs) const {return _value.get() != rhs;}
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template<typename T> const bool operator < (const T rhs) const {return _value.get() < rhs;}
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template<typename T> const bool operator > (const T rhs) const {return _value.get() > rhs;}
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template<typename T> const bool operator <=(const T rhs) const {return _value.get() <= rhs;}
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template<typename T> const bool operator >=(const T rhs) const {return _value.get() >= rhs;}
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private:
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static const int size_of_big_object = 128;
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InternalNullable<T, sizeof(T) / (size_of_big_object + 1) >= 1> _value;
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};
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template<class T> const bool operator== (const T x, nullable__<T> const& y) {return y == x;}
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template<class T> const bool operator!= (const T x, nullable__<T> const& y) {return y != x;}
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template<class T> const bool operator< (const T x, nullable__<T> const& y) {return y >= x;}
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template<class T> const bool operator> (const T x, nullable__<T> const& y) {return y <= x;}
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template<class T> const bool operator<= (const T x, nullable__<T> const& y) {return y > x;}
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template<class T> const bool operator>= (const T x, nullable__<T> const& y) {return y < x;}
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template<typename V, class T> const bool operator ==(const V x, nullable__<T> const& y) {return y == x;}
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template<typename V, class T> const bool operator !=(const V x, nullable__<T> const& y) {return y != x;}
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template<typename V, class T> const bool operator < (const V x, nullable__<T> const& y) {return y < x;}
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template<typename V, class T> const bool operator > (const V x, nullable__<T> const& y) {return y > x;}
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template<typename V, class T> const bool operator <=(const V x, nullable__<T> const& y) {return y <= x;}
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template<typename V, class T> const bool operator >=(const V x, nullable__<T> const& y) {return y >= x;}
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template<typename T, typename U> const nullable__<T>& nullable_setter(nullable__<T>& lhs, const U& rhs)
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{
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return lhs.nullable_setter(rhs);
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}
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template<typename T> const std::string ToString(const nullable__<T>& value)
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{
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return value.ToString();
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}
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#endif // UTILITY_NULLABLE_INCLUDE_H_
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