VALIDITY VCFG

ETL2 p.52:
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A Formal_generics part of a Class_declaration is valid if and only
if every Formal_generic_name G appearing in it satisfies the following
two conditions:
1. G is different from the name of any class in the surrounding
   universe.
2. G is different from any other Formal_generic_name appearing in
   the same Formal_generics part.
----------------------------------------------------------------------

ETR p.16:
----------------------------------------------------------------------
A Formal_generics part of a Class_declaration is valid if and only
if every Formal_generic_name G appearing in it satisfies the following
three conditions:
1. G is different from the name of any class in the surrounding
   universe.
2. G is different from any other Formal_generic_name appearing in
   the same Formal_generics part.
3. If a Constraint is given, it does not involve any types other than
   class names and formal generic parameters other than G itself.
----------------------------------------------------------------------


TEST DESCRIPTION:
----------------------------------------------------------------------
The constraint of the formal generic parameter of class CC is
DD [like name], but 'like name' is not only made up of class
names nor names of formal generic parameters. Validity VCFG-3
is violated.
----------------------------------------------------------------------


TEST RESULTS:
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ISE Eiffel 5.0.016:    OK
SmallEiffel -0.76:     PASSED    Does not report VCFG-3 and interprets
                                 'like name' as STRING.
Halstenbach 3.2:       OK
gelint:                OK
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TEST CLASSES:
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class AA

create

	make

feature

	make is
		local
			b: BB
		do
			!! b
			b.f
			print (b.item.generating_type)
		end

end -- class AA
----------------------------------------------------------------------
class BB

inherit

	CC [DD [STRING]]

feature

	f is
		local
			d: DD [STRING]
		do
			!! d
			item := d
		end

end -- class BB
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class CC [G -> DD [like name]]

feature

	name: STRING

	item: G

end -- class CC
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class DD [G]

feature 

	item: G

end -- class DD
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