ここまでは割とどうにでもなるわけだが、recursive_variantの実装が面倒な予感しかしない [Wandbox]三へ( へ՞ਊ ՞)へ ハッハッ http://melpon.org/wandbox/permlink/tdkbGslbk0CH3GJs …
5:35 AM - 19 Sep 2014
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