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property.h
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1943 lines (1733 loc) · 53.9 KB
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#ifndef _PROPERTY_H_
#define _PROPERTY_H_
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <limits>
#include <type_traits>
#include <utility>
#define _SW_DEFINE_OPERATION_HELPER(NAME, OP) \
template <typename T, typename U, typename = void> \
struct NAME : std::false_type { \
}; \
template <typename T, typename U> \
struct NAME<T, U, decltype(void(std::declval<T>() OP std::declval<U>()))> : std::true_type { \
using type = decltype(std::declval<T>() OP std::declval<U>()); \
}
#define _SW_DEFINE_UNARY_OPERATION_HELPER(NAME, OP) \
template <typename T, typename = void> \
struct NAME : std::false_type { \
}; \
template <typename T> \
struct NAME<T, decltype(void(OP std::declval<T>()))> : std::true_type { \
using type = decltype(OP std::declval<T>()); \
}
/*================================================================================*/
/**
* 向前声明
*/
template <typename T, typename TDerived>
class PropertyBase;
template <typename T>
class Property;
template <typename T>
class ReadOnlyProperty;
template <typename T>
class WriteOnlyProperty;
/*================================================================================*/
// SFINAE templates
_SW_DEFINE_OPERATION_HELPER(_AddOperationHelper, +);
_SW_DEFINE_OPERATION_HELPER(_SubOperationHelper, -);
_SW_DEFINE_OPERATION_HELPER(_MulOperationHelper, *);
_SW_DEFINE_OPERATION_HELPER(_DivOperationHelper, /);
_SW_DEFINE_OPERATION_HELPER(_ModOperationHelper, %);
_SW_DEFINE_OPERATION_HELPER(_EqOperationHelper, ==);
_SW_DEFINE_OPERATION_HELPER(_NeOperationHelper, !=);
_SW_DEFINE_OPERATION_HELPER(_LtOperationHelper, <);
_SW_DEFINE_OPERATION_HELPER(_LeOperationHelper, <=);
_SW_DEFINE_OPERATION_HELPER(_GtOperationHelper, >);
_SW_DEFINE_OPERATION_HELPER(_GeOperationHelper, >=);
_SW_DEFINE_OPERATION_HELPER(_BitAndOperationHelper, &);
_SW_DEFINE_OPERATION_HELPER(_BitOrOperationHelper, |);
_SW_DEFINE_OPERATION_HELPER(_BitXorOperationHelper, ^);
_SW_DEFINE_OPERATION_HELPER(_ShlOperationHelper, <<);
_SW_DEFINE_OPERATION_HELPER(_ShrOperationHelper, >>);
_SW_DEFINE_OPERATION_HELPER(_LogicAndOperationHelper, &&);
_SW_DEFINE_OPERATION_HELPER(_LogicOrOperationHelper, ||);
_SW_DEFINE_UNARY_OPERATION_HELPER(_LogicNotOperationHelper, !);
_SW_DEFINE_UNARY_OPERATION_HELPER(_BitNotOperationHelper, ~);
_SW_DEFINE_UNARY_OPERATION_HELPER(_DerefOperationHelper, *);
_SW_DEFINE_UNARY_OPERATION_HELPER(_AddrOperationHelper, &);
_SW_DEFINE_UNARY_OPERATION_HELPER(_UnaryPlusOperationHelper, +);
_SW_DEFINE_UNARY_OPERATION_HELPER(_UnaryMinusOperationHelper, -);
// _SW_DEFINE_UNARY_OPERATION_HELPER(_PreIncOperationHelper, ++);
// _SW_DEFINE_UNARY_OPERATION_HELPER(_PreDecOperationHelper, --);
/**
* @brief _IsProperty的实现
*/
template <typename T>
struct _IsPropertyImpl {
private:
template <typename U, typename V>
static std::true_type test(const PropertyBase<U, V> *);
static std::false_type test(...);
public:
using type = decltype(test(std::declval<T *>()));
};
/**
* @brief 判断类型是否为属性的辅助模板
*/
template <typename T>
struct _IsProperty : _IsPropertyImpl<typename std::decay<T>::type>::type {
};
/**
* @brief 判断类型是否有GetterImpl成员的辅助模板
*/
template <typename, typename = void>
struct _HasGetterImpl : std::false_type {
};
/**
* @brief _HasGetterImpl模板特化
*/
template <typename T>
struct _HasGetterImpl<
T, decltype(void(&T::GetterImpl))> : std::true_type {
};
/**
* @brief 判断类型是否有SetterImpl成员的辅助模板
*/
template <typename, typename = void>
struct _HasSetterImpl : std::false_type {
};
/**
* @brief _HasSetterImpl模板特化
*/
template <typename T>
struct _HasSetterImpl<
T, decltype(void(&T::SetterImpl))> : std::true_type {
};
/**
* @brief 判断类型是否为可读属性的辅助模板
*/
template <typename T>
struct _IsReadableProperty
: std::integral_constant<bool, _IsProperty<T>::value && _HasGetterImpl<T>::value> {
};
/**
* @brief 判断类型是否为可写属性的辅助模板
*/
template <typename T>
struct _IsWritableProperty
: std::integral_constant<bool, _IsProperty<T>::value && _HasSetterImpl<T>::value> {
};
/**
* @brief 判断类型是否可以使用[]操作符的辅助模板
*/
template <typename T, typename U, typename = void>
struct _BracketOperationHelper : std::false_type {
};
/**
* @brief _BracketOperationHelper模板特化
*/
template <typename T, typename U>
struct _BracketOperationHelper<
T, U, decltype(void(std::declval<T>()[std::declval<U>()]))> : std::true_type {
using type = decltype(std::declval<T>()[std::declval<U>()]);
};
/**
* @brief 判断类型是否可以显式转换的辅助模板
*/
template <typename TFrom, typename TTo, typename = void>
struct _IsExplicitlyConvertable : std::false_type {
};
/**
* @brief _IsExplicitlyConvertable模板特化
*/
template <typename TFrom, typename TTo>
struct _IsExplicitlyConvertable<
TFrom, TTo, decltype(void(static_cast<TTo>(std::declval<TFrom>())))> : std::true_type {
};
/**
* @brief 判断类型是否有operator->的辅助模板
*/
template <typename T, typename = void>
struct _HasArrowOperator : std::false_type {
};
/**
* @brief _HasArrowOperator模板特化
*/
template <typename T>
struct _HasArrowOperator<
T, decltype(void(std::declval<T>().operator->()))> : std::true_type {
using type = decltype(std::declval<T>().operator->());
};
/**
* @brief 属性setter参数类型辅助模板
*/
template <typename T>
struct _PropertySetterParamTypeHelper {
using type = typename std::conditional<
std::is_scalar<T>::value, T, const T &>::type;
};
/**
* @brief 属性setter参数类型
*/
template <typename T>
using _PropertySetterParamType =
typename _PropertySetterParamTypeHelper<typename std::decay<T>::type>::type;
/*================================================================================*/
/**
* @brief 字段访问器,用于实现使用operator->取属性字段
*/
template <typename T>
struct FieldsAccessor {
/**
* @brief 字段访问器所维护的值
*/
T value;
/**
* @brief 构造字段访问器
*/
template <typename... Args>
FieldsAccessor(Args &&...args)
: value(std::forward<Args>(args)...)
{
}
/**
* @brief 指针类型,直接返回值
*/
template <typename U = T>
typename std::enable_if<std::is_pointer<U>::value, U>::type operator->()
{
return this->value;
}
/**
* @brief 非指针类型,且无operator->,返回值的地址
*/
template <typename U = T>
typename std::enable_if<!std::is_pointer<U>::value && !_HasArrowOperator<U>::value, U *>::type operator->()
{
return &this->value;
}
/**
* @brief 非指针类型,且有operator->,转发operator->
*/
template <typename U = T>
typename std::enable_if<!std::is_pointer<U>::value && _HasArrowOperator<U>::value, typename _HasArrowOperator<U>::type>::type operator->()
{
return this->value.operator->();
}
};
/**
* @brief 成员属性初始化器
*/
template <typename TOwner, typename TValue>
class MemberPropertyInitializer
{
friend class Property<TValue>;
friend class ReadOnlyProperty<TValue>;
friend class WriteOnlyProperty<TValue>;
private:
/**
* @brief 属性所有者
*/
TOwner *_owner;
/**
* @brief getter函数指针
*/
TValue (*_getter)(TOwner *);
/**
* @brief setter函数指针
*/
void (*_setter)(TOwner *, _PropertySetterParamType<TValue>);
public:
/**
* @brief 构造成员属性初始化器
*/
MemberPropertyInitializer(TOwner *owner)
: _owner(owner), _getter(nullptr), _setter(nullptr)
{
}
/**
* @brief 设置getter
*/
MemberPropertyInitializer &Getter(TValue (*getter)(TOwner *))
{
this->_getter = getter;
return *this;
}
/**
* @brief 设置setter
*/
MemberPropertyInitializer &Setter(void (*setter)(TOwner *, _PropertySetterParamType<TValue>))
{
this->_setter = setter;
return *this;
}
/**
* @brief 设置成员函数getter
*/
template <TValue (TOwner::*getter)()>
MemberPropertyInitializer &Getter()
{
return this->Getter(
[](TOwner *owner) -> TValue {
return (owner->*getter)();
});
}
/**
* @brief 设置成员函数getter
*/
template <TValue (TOwner::*getter)() const>
MemberPropertyInitializer &Getter()
{
return this->Getter(
[](TOwner *owner) -> TValue {
return (owner->*getter)();
});
}
/**
* @brief 设置成员函数setter
*/
template <void (TOwner::*setter)(_PropertySetterParamType<TValue>)>
MemberPropertyInitializer &Setter()
{
return this->Setter(
[](TOwner *owner, _PropertySetterParamType<TValue> value) {
(owner->*setter)(value);
});
}
/**
* @brief 设置成员函数setter
*/
template <void (TOwner::*setter)(_PropertySetterParamType<TValue>) const>
MemberPropertyInitializer &Setter()
{
return this->Setter(
[](TOwner *owner, _PropertySetterParamType<TValue> value) {
(owner->*setter)(value);
});
}
/**
* @brief 设置简单字段getter
*/
template <TValue TOwner::*field>
MemberPropertyInitializer &Getter()
{
return this->Getter(
[](TOwner *owner) -> TValue {
return owner->*field;
});
}
/**
* @brief 设置简单字段setter
*/
template <TValue TOwner::*field>
MemberPropertyInitializer &Setter()
{
return this->Setter(
[](TOwner *owner, _PropertySetterParamType<TValue> value) {
owner->*field = value;
});
}
};
/**
* @brief 静态属性初始化器
*/
template <typename TValue>
class StaticPropertyInitializer
{
friend class Property<TValue>;
friend class ReadOnlyProperty<TValue>;
friend class WriteOnlyProperty<TValue>;
private:
/**
* @brief getter函数指针
*/
TValue (*_getter)();
/**
* @brief setter函数指针
*/
void (*_setter)(_PropertySetterParamType<TValue>);
public:
/**
* @brief 构造静态属性初始化器
*/
StaticPropertyInitializer()
: _getter(nullptr), _setter(nullptr)
{
}
/**
* @brief 设置getter
*/
StaticPropertyInitializer &Getter(TValue (*getter)())
{
this->_getter = getter;
return *this;
}
/**
* @brief 设置setter
*/
StaticPropertyInitializer &Setter(void (*setter)(_PropertySetterParamType<TValue>))
{
this->_setter = setter;
return *this;
}
};
/*================================================================================*/
/**
* @brief 属性基类模板
*/
template <typename T, typename TDerived>
class PropertyBase
{
public:
// 属性值类型别名
using TValue = T;
// setter参数类型别名
using TSetterParam = _PropertySetterParamType<T>;
// /**
// * @brief 获取属性值,由子类实现
// */
// T GetterImpl() const;
// /**
// * @brief 设置属性值,由子类实现
// */
// void SetterImpl(TSetterParam value) const;
/**
* @brief 访问属性字段,可由子类重写
*/
FieldsAccessor<T> AccessFields() const
{
return FieldsAccessor<T>(this->Get());
}
/**
* @brief 获取属性值
*/
T Get() const
{
return static_cast<const TDerived *>(this)->GetterImpl();
}
/**
* @brief 设置属性值
*/
void Set(TSetterParam value) const
{
static_cast<const TDerived *>(this)->SetterImpl(value);
}
/**
* @brief 取属性字段
*/
auto operator->() const
{
return static_cast<const TDerived *>(this)->AccessFields();
}
/**
* @brief 隐式转换
*/
operator T() const
{
return this->Get();
}
/**
* @brief 隐式转换
*/
template <
typename U = T,
typename = typename std::enable_if<!std::is_arithmetic<T>::value && std::is_convertible<T, U>::value, U>::type>
operator U() const
{
return static_cast<U>(this->Get());
}
/**
* @brief 显式转换
*/
template <
typename U = T,
typename = typename std::enable_if<!std::is_arithmetic<T>::value && !std::is_convertible<T, U>::value, U>::type,
typename = typename std::enable_if<!std::is_arithmetic<T>::value && _IsExplicitlyConvertable<T, U>::value, U>::type>
explicit operator U() const
{
return static_cast<U>(this->Get());
}
/**
* @brief 设置属性值
*/
TDerived &operator=(TSetterParam value)
{
this->Set(value);
return *static_cast<TDerived *>(this);
}
/**
* @brief 设置属性值
*/
const TDerived &operator=(TSetterParam value) const
{
this->Set(value);
return *static_cast<const TDerived *>(this);
}
/**
* @brief 设置属性值
*/
TDerived &operator=(const PropertyBase &prop)
{
this->Set(prop.Get());
return *static_cast<TDerived *>(this);
}
/**
* @brief 设置属性值
*/
const TDerived &operator=(const PropertyBase &prop) const
{
this->Set(prop.Get());
return *static_cast<const TDerived *>(this);
}
/**
* @brief 加赋值运算
*/
template <typename U>
auto operator+=(U &&value)
-> typename std::enable_if<_AddOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() + std::forward<U>(value));
return *static_cast<TDerived *>(this);
}
/**
* @brief 加赋值运算
*/
template <typename U>
auto operator+=(U &&value) const
-> typename std::enable_if<_AddOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() + std::forward<U>(value));
return *static_cast<const TDerived *>(this);
}
/**
* @brief 加赋值运算
*/
template <typename D, typename U>
auto operator+=(const PropertyBase<U, D> &prop)
-> typename std::enable_if<_AddOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() + prop.Get());
return *static_cast<TDerived *>(this);
}
/**
* @brief 加赋值运算
*/
template <typename D, typename U>
auto operator+=(const PropertyBase<U, D> &prop) const
-> typename std::enable_if<_AddOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() + prop.Get());
return *static_cast<const TDerived *>(this);
}
/**
* @brief 减赋值运算
*/
template <typename U>
auto operator-=(U &&value)
-> typename std::enable_if<_SubOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() - std::forward<U>(value));
return *static_cast<TDerived *>(this);
}
/**
* @brief 减赋值运算
*/
template <typename U>
auto operator-=(U &&value) const
-> typename std::enable_if<_SubOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() - std::forward<U>(value));
return *static_cast<const TDerived *>(this);
}
/**
* @brief 减赋值运算
*/
template <typename D, typename U>
auto operator-=(const PropertyBase<U, D> &prop)
-> typename std::enable_if<_SubOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() - prop.Get());
return *static_cast<TDerived *>(this);
}
/**
* @brief 减赋值运算
*/
template <typename D, typename U>
auto operator-=(const PropertyBase<U, D> &prop) const
-> typename std::enable_if<_SubOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() - prop.Get());
return *static_cast<const TDerived *>(this);
}
/**
* @brief 乘赋值运算
*/
template <typename U>
auto operator*=(U &&value)
-> typename std::enable_if<_MulOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() * std::forward<U>(value));
return *static_cast<TDerived *>(this);
}
/**
* @brief 乘赋值运算
*/
template <typename U>
auto operator*=(U &&value) const
-> typename std::enable_if<_MulOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() * std::forward<U>(value));
return *static_cast<const TDerived *>(this);
}
/**
* @brief 乘赋值运算
*/
template <typename D, typename U>
auto operator*=(const PropertyBase<U, D> &prop)
-> typename std::enable_if<_MulOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() * prop.Get());
return *static_cast<TDerived *>(this);
}
/**
* @brief 乘赋值运算
*/
template <typename D, typename U>
auto operator*=(const PropertyBase<U, D> &prop) const
-> typename std::enable_if<_MulOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() * prop.Get());
return *static_cast<const TDerived *>(this);
}
/**
* @brief 除赋值运算
*/
template <typename U>
auto operator/=(U &&value)
-> typename std::enable_if<_DivOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() / std::forward<U>(value));
return *static_cast<TDerived *>(this);
}
/**
* @brief 除赋值运算
*/
template <typename U>
auto operator/=(U &&value) const
-> typename std::enable_if<_DivOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() / std::forward<U>(value));
return *static_cast<const TDerived *>(this);
}
/**
* @brief 除赋值运算
*/
template <typename D, typename U>
auto operator/=(const PropertyBase<U, D> &prop)
-> typename std::enable_if<_DivOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() / prop.Get());
return *static_cast<TDerived *>(this);
}
/**
* @brief 除赋值运算
*/
template <typename D, typename U>
auto operator/=(const PropertyBase<U, D> &prop) const
-> typename std::enable_if<_DivOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() / prop.Get());
return *static_cast<const TDerived *>(this);
}
/**
* @brief 前置自增运算
*/
template <typename U = T>
auto operator++()
-> typename std::enable_if<_AddOperationHelper<U, int>::value, TDerived &>::type
{
this->Set(this->Get() + 1);
return *static_cast<TDerived *>(this);
}
/**
* @brief 前置自增运算
*/
template <typename U = T>
auto operator++() const
-> typename std::enable_if<_AddOperationHelper<U, int>::value, const TDerived &>::type
{
this->Set(this->Get() + 1);
return *static_cast<const TDerived *>(this);
}
/**
* @brief 前置自减运算
*/
template <typename U = T>
auto operator--()
-> typename std::enable_if<_SubOperationHelper<U, int>::value, TDerived &>::type
{
this->Set(this->Get() - 1);
return *static_cast<TDerived *>(this);
}
/**
* @brief 前置自减运算
*/
template <typename U = T>
auto operator--() const
-> typename std::enable_if<_SubOperationHelper<U, int>::value, const TDerived &>::type
{
this->Set(this->Get() - 1);
return *static_cast<const TDerived *>(this);
}
/**
* @brief 后置自增运算
*/
template <typename U = T>
auto operator++(int) const
-> typename std::enable_if<_AddOperationHelper<U, int>::value, T>::type
{
T oldval = this->Get();
this->Set(oldval + 1);
return oldval;
}
/**
* @brief 后置自减运算
*/
template <typename U = T>
auto operator--(int) const
-> typename std::enable_if<_SubOperationHelper<U, int>::value, T>::type
{
T oldval = this->Get();
this->Set(oldval - 1);
return oldval;
}
/**
* @brief 按位与赋值运算
*/
template <typename U>
auto operator&=(U &&value)
-> typename std::enable_if<_BitAndOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() & std::forward<U>(value));
return *static_cast<TDerived *>(this);
}
/**
* @brief 按位与赋值运算
*/
template <typename U>
auto operator&=(U &&value) const
-> typename std::enable_if<_BitAndOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() & std::forward<U>(value));
return *static_cast<const TDerived *>(this);
}
/**
* @brief 按位与赋值运算
*/
template <typename D, typename U>
auto operator&=(const PropertyBase<U, D> &prop)
-> typename std::enable_if<_BitAndOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() & prop.Get());
return *static_cast<TDerived *>(this);
}
/**
* @brief 按位与赋值运算
*/
template <typename D, typename U>
auto operator&=(const PropertyBase<U, D> &prop) const
-> typename std::enable_if<_BitAndOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() & prop.Get());
return *static_cast<const TDerived *>(this);
}
/**
* @brief 按位或赋值运算
*/
template <typename U>
auto operator|=(U &&value)
-> typename std::enable_if<_BitOrOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() | std::forward<U>(value));
return *static_cast<TDerived *>(this);
}
/**
* @brief 按位或赋值运算
*/
template <typename U>
auto operator|=(U &&value) const
-> typename std::enable_if<_BitOrOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() | std::forward<U>(value));
return *static_cast<const TDerived *>(this);
}
/**
* @brief 按位或赋值运算
*/
template <typename D, typename U>
auto operator|=(const PropertyBase<U, D> &prop)
-> typename std::enable_if<_BitOrOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() | prop.Get());
return *static_cast<TDerived *>(this);
}
/**
* @brief 按位或赋值运算
*/
template <typename D, typename U>
auto operator|=(const PropertyBase<U, D> &prop) const
-> typename std::enable_if<_BitOrOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() | prop.Get());
return *static_cast<const TDerived *>(this);
}
/**
* @brief 按位异或赋值运算
*/
template <typename U>
auto operator^=(U &&value)
-> typename std::enable_if<_BitXorOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() ^ std::forward<U>(value));
return *static_cast<TDerived *>(this);
}
/**
* @brief 按位异或赋值运算
*/
template <typename U>
auto operator^=(U &&value) const
-> typename std::enable_if<_BitXorOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() ^ std::forward<U>(value));
return *static_cast<const TDerived *>(this);
}
/**
* @brief 按位异或赋值运算
*/
template <typename D, typename U>
auto operator^=(const PropertyBase<U, D> &prop)
-> typename std::enable_if<_BitXorOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() ^ prop.Get());
return *static_cast<TDerived *>(this);
}
/**
* @brief 按位异或赋值运算
*/
template <typename D, typename U>
auto operator^=(const PropertyBase<U, D> &prop) const
-> typename std::enable_if<_BitXorOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() ^ prop.Get());
return *static_cast<const TDerived *>(this);
}
/**
* @brief 左移赋值运算
*/
template <typename U>
auto operator<<=(U &&value)
-> typename std::enable_if<_ShlOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() << std::forward<U>(value));
return *static_cast<TDerived *>(this);
}
/**
* @brief 左移赋值运算
*/
template <typename U>
auto operator<<=(U &&value) const
-> typename std::enable_if<_ShlOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() << std::forward<U>(value));
return *static_cast<const TDerived *>(this);
}
/**
* @brief 左移赋值运算
*/
template <typename D, typename U>
auto operator<<=(const PropertyBase<U, D> &prop)
-> typename std::enable_if<_ShlOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() << prop.Get());
return *static_cast<TDerived *>(this);
}
/**
* @brief 左移赋值运算
*/
template <typename D, typename U>
auto operator<<=(const PropertyBase<U, D> &prop) const
-> typename std::enable_if<_ShlOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() << prop.Get());
return *static_cast<const TDerived *>(this);
}
/**
* @brief 右移赋值运算
*/
template <typename U>
auto operator>>=(U &&value)
-> typename std::enable_if<_ShrOperationHelper<T, U>::value, TDerived &>::type
{
this->Set(this->Get() >> std::forward<U>(value));
return *static_cast<TDerived *>(this);
}
/**
* @brief 右移赋值运算
*/
template <typename U>
auto operator>>=(U &&value) const
-> typename std::enable_if<_ShrOperationHelper<T, U>::value, const TDerived &>::type
{
this->Set(this->Get() >> std::forward<U>(value));
return *static_cast<const TDerived *>(this);
}
/**
* @brief 右移赋值运算
*/
template <typename D, typename U>