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view tests/pprint.ur @ 2274:0730e217fc9c

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First draft of more specific formulas for queries.
author Ziv Scully <ziv@mit.edu>
date Thu, 05 Nov 2015 01:48:42 -0500
parents 318ba997a149
children
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fun isNone [a] (x : option a) =
    case x of
        None => True
      | Some _ => False