->transfer is documented in Coro::State. And you can do what you want like this: 
my $empty = new Coro::State;
my $other;

$other = new Coro::State sub {
   print "hi\n";
   $other->transfer ($empty);
};

$empty->transfer ($other);

[download]
see also the t/00* test script which does this.

In reply to Re^2: Coro: running a specific coroutine by Anonymous Monk
in thread Coro: running a specific coroutine by moritz

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