comparison lib/ur/option.ur @ 1887:2e6795cc992f

A fancier test for the new SQL constraints subtyping
author Adam Chlipala <adam@chlipala.net>
date Mon, 04 Nov 2013 16:00:48 -0500
parents 36428d853c97
children
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1886:b7cd3c7c7edd 1887:2e6795cc992f