[isabelle-dev] type class instantiation

[Florian Haftmann]

> Florian can say, if he originally meant to support different type
> variable names as shown above.  There might be some type improvement in
> the context that needs to be re-adjusted (or some now unused things to
> be removed).

The assumption has always been that type variable carry canonical names
'a 'b 'c … because the instantiation type must be fixed in the
beginning.  That it ever used to work with other names was nothing but a
mere accident.

	Florian

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