operator<<,>> (std::shuffle_order_engine)

From cppreference.net

template < class CharT, class Traits > friend std:: basic_ostream < CharT,Traits > & operator << ( std:: basic_ostream < CharT,Traits > & ost, shuffle_order_engine <> & e ) ;	(1)	(自 C++11 起)
template < class CharT, class Traits > friend std:: basic_istream < CharT,Traits > & operator >> ( std:: basic_istream < CharT,Traits > & ist, shuffle_order_engine & e ) ;	(2)	(自 C++11 起)

1) 将伪随机数引擎适配器的内部状态序列化为以空格分隔的十进制数字序列，并将其插入到流 ost 中。流的填充字符和格式化标志将被忽略且不受影响。

2) 从序列化表示中恢复伪随机数引擎适配器 e 的内部状态，该序列化表示由先前对


        operator<<

的调用创建，且使用了具有相同本地化环境和相同


        CharT

与


        Traits

的流。若输入无法反序列化，则保持 e 不变，并在 ist 上设置


        failbit

。

这些函数模板对普通的非限定查找或限定查找不可见，仅当 std::shuffle_order_engine<Engine, k> 作为参数的关联类时，才能通过实参依赖查找找到它们。

如果使用 os << x 写入文本表示，并使用 is >> y 将该表示恢复到相同类型的同一对象或不同对象 y 中，则 x == y 。

本节内容尚不完整
原因：标准还定义了文本表示的具体构成

Compiler support
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Language
Standard library
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Feature test macros (C++20)
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Metaprogramming library (C++11)
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Member functions
shuffle_order_engine::shuffle_order_engine
shuffle_order_engine::seed
shuffle_order_engine::base
Generation
shuffle_order_engine::operator()
shuffle_order_engine::discard
Characteristics
shuffle_order_engine::min
shuffle_order_engine::max
Non-member functions
operator== operator!= (C++11) (C++11) (until C++20)
operator<< operator>> (C++11) (C++11)

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