Bug 16130 – Disallow class template constraints from appearing after BaseClassList

Currently, a Constraint is allowed both before and after the BaseClassList by the grammar: http://dlang.org/spec/template.html#ClassTemplateDeclaration http://dlang.org/spec/template.html#InterfaceTemplateDeclaration There is no purpose to the redundancy, and the 'after' syntax doesn't make much sense. The grammar rules: class Identifier TemplateParameters BaseClassListopt Constraintopt AggregateBody interface Identifier TemplateParameters BaseInterfaceList Constraint AggregateBody should be removed. I don't know how they ever got there in the first place.

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