Thu, 11 Jun 2015 16:15:27 +0200 wenzelm made SML/NJ happy;
Thu, 11 Jun 2015 15:44:00 +0200 wenzelm support to parse obtain clause without type-checking yet;
Thu, 11 Jun 2015 11:09:05 +0200 wenzelm tuned -- eliminated unused feature;
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