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From: Florian Weimer <fw@deneb.cygnus.argh.org>
Subject: Re: Newbie question about  Character range 'A' .. 'Z'
Date: 2000/05/17
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gressett@iglobal.net writes:

> Is Gnat 3.12p being overly restrictive, or is the erratum wrong?

The ARM says (3.5 and 4.4):

|  2.      range_constraint ::= <range> range
|
|  3.      range ::=
|               range_attribute_reference
|             | simple_expression .. simple_expression

|  3.      relation ::=
|               simple_expression [relational_operator simple_expression]
|             | simple_expression [<not>] <in> range
|             | simple_expression [<not>] <in> subtype_mark

GNAT seems to be right.