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

From cppreference.com
< cpp‎ | numeric‎ | random‎ | shuffle order engine

[edit template]

template< class CharT, class Traits, class Engine, size_t k > std::basic_ostream<CharT,Traits>& operator<<( std::basic_ostream<CharT,Traits>& ost, const std::shuffle_order_engine<Engine,k>& e ); | (1) | (since C++11)
template< class CharT, class Traits, class Engine, size_t k > std::basic_istream<CharT,Traits>& operator>>( std::basic_istream<CharT,Traits>& ist, std::shuffle_order_engine<Engine,k>& e ); | (2) | (since C++11)

1) Serializes the internal state of the pseudo-random number engine adaptor as a sequence of decimal numbers separated by one or more spaces, and inserts it to the stream `ost`. The fill character and the formatting flags of the stream are ignored and unaffected.
2) Restores the internal state of the pseudo-random number engine adaptor `e` from the serialized representation, which was created by an earlier call to `operator<<` using a stream with the same imbued locale and the same `CharT` and `Traits`. If the input cannot be deserialized, `e` is left unchanged and `failbit` is raised on `ist`

If a textual representation is written using os << x and that representation is restored into the same or a different object `y` of the same type using is >> y, then x==y.

| This section is incomplete Reason: standard also defines what the textual representation consists of

### [edit] Parameters

ost | - | output stream to insert the data to
ist | - | input stream to extract the data from
e | - | engine adaptor to serialize or restore

### [edit] Return value

1) `ost`
2) `ist`

### [edit] Complexity

| This section is incomplete

### [edit] Exceptions

1) (none)
2) May throw std::ios::failure when setting `failbit`
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