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From: =?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?=
 =?utf-8?Q?=29?=
 <yannick_duchene@yahoo.fr>
Newsgroups: comp.lang.ada
Subject: Tiny error in GNAT: wrong message about unknown discrimant
Date: Wed, 25 May 2011 19:08:29 +0200
Organization: Ada @ Home
Message-ID: <op.vv1q8fbmule2fv@douda-yannick>
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Date: 2011-05-25T19:08:29+02:00
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Hello,

Create a type with an unknown discriminant in the public part of a packa=
ge  =

(and optionally a concrete discriminant in the full definition). Declare=
  =

an instance of that type in a procedure outside of that package, and do =
so  =

without any initialization, and instead, erroneously add a discriminant.=
  =

GNAT will complain =E2=80=9Cinvalid constraint: type has no discriminant=
=E2=80=9D. This is  =

inconsistent, as the type has a discriminated view; it should instead sa=
y  =

=E2=80=9Cinvalid constraint: type discriminant is unknown=E2=80=9D.

Not sure it is worth a bug report, but at least, this is probably  =

confusing enough for beginners.

-- =

Si les chats miaulent et font autant de vocalises bizarres, c=E2=80=99es=
t pas pour  =

les chiens.
=E2=80=9C c++; /* this makes c bigger but returns the old value */ =E2=80=
=9D [Anonymous]