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### 730. Comment on [rand.req.adapt]/3 e)

Section: 26.6.3.5 [rand.req.adapt] Status: NAD Submitter: Stephan Tolksdorf Opened: 2007-09-21 Last modified: 2016-01-28

Priority: Not Prioritized

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Discussion:

If an engine adaptor is invoked with an argument of type `seed_seq`, then all base engines are specified to be seeded with this `seed_seq`. As `seed_seq`'s randomization method is qualified as constant, this procedure will ef fectively initialize all base engines with the same seed (though the resulting state might still dif fer to a certain degree if the engines are of different types). It is not clear whether this mode of operation is in general appropriate, hence -- as far as the stated requirements are of general nature and not just specific to the engine adaptors provided by the library -- it might be better to leave the behaviour unspecified, since the current definition of `seed_seq` does not allow for a generally satisfying specification.

Posssible resolution: [As above]

See N2424 for further discussion.

[ Bellevue: ]

> Close NAD for the reasons given in N2424.

Proposed resolution:

See N2424 for the proposed resolution.