How to break from parallel foreach?

[Russel Winder]

On Tue, 2019-02-26 at 19:58 +0000, Andrey via Digitalmars-d-learn wrote:
> Hello,
> How to break from parallel foreach?
> More general question - how to control such loop?

It is not clear to me that the concept of "breaking" from a parallel loop
makes sense.

For a sequential loop each loop body is executed one after the other, and so
the concept of "break" makes some sort of sense as an early exit.

For a parallel loop, each loop body is (at least conceptually) executed at the
same time, there is no sequential activity, thus no relevance of "break". A
parallel for is really a scatter of all the loop bodies which then execute,
and then there is a gather, and maybe even a reduction. The notion of "break"
seems to have no meaning in such a computation.

-- 
Russel.
===========================================
Dr Russel Winder      t: +44 20 7585 2200
41 Buckmaster Road    m: +44 7770 465 077
London SW11 1EN, UK   w: www.russel.org.uk

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