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Interpret 'table' signature items more flexibly, automatically adding (Ur) constraints to support a kind of subtyping over (SQL) constraint sets
author Adam Chlipala <adam@chlipala.net>
date Mon, 04 Nov 2013 15:14:23 -0500
parents 16ee7ff7f119
children
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structure M = struct end

fun f (x : $M.r) : $([A = int] ++ M.r) = x