(1) (since C++11)
template< class Sseq >
explicit discard_block_engine( Sseq& seq );
(2) (since C++11)
explicit discard_block_engine( const Engine& e );
(3) (since C++11)
explicit discard_block_engine( Engine&& e );
(4) (since C++11)

Constructs new pseudo-random engine adaptor.

1) Default constructor. The underlying engine is also default-constructed.
2) Constructs the underlying engine with seed sequence seq.
3) Constructs the underlying engine with a copy of e.
4) Move-constructs the underlying engine with e. e holds unspecified, but valid state afterwards.

[edit] Parameters

seq - seed sequence to construct the underlying engine with
e - pseudo-random number engine to initialize with