Host languages are: C++, Java, C#
Paren | https://bitbucket.org/ktg/paren
ParenJ | https://bitbucket.org/ktg/parenj
Paren# | https://bitbucket.org/ktg/parensharp
> (set t1 (thread (for i 1 10 1 (pr "" i)))) (set t2 (thread (for j 11 20 1 (pr "" j)))) (join t1) (join t2)
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