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<?php function mutate($value, Generator $mutator) { while ($mutator->valid()) { try { $fn = $mutator->current(); $value = $fn($value); $mutator->send($value); } catch (Exception $e) { $mutator->throw($e); } } } $mutations = [ function ($n) { return $n + 1; }, function ($n) { return $n + 2; }, function ($n) { return $n + 3; }, function ($n) { return $n + 4; }, ]; function debuggingMutator(array $mutations) { foreach ($mutations as $mutation) { $result = (yield $mutation); echo "Result: {$result}\n"; } } mutate(0, debuggingMutator($mutations));
Output for git.master, git.master_jit, rfc.property-hooks
Result: 1 Result: 3 Result: 6 Result: 10

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