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From: Matthew Heaney <matthew_heaney@acm.org>
Subject: Re: i need help w/problem
Date: 1999/02/22
Message-ID: <m3zp66ffgs.fsf@mheaney.ni.net>#1/1
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References: <7aqjie$npj@netaxs.com> <Iz6A2.2502$LN5.3278079@news2.mia>
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NNTP-Posting-Date: Mon, 22 Feb 1999 10:38:57 PDT
Newsgroups: comp.lang.ada
Date: 1999-02-22T00:00:00+00:00
List-Id: <comp.lang.ada>

"David C. Hoos, Sr." <david.c.hoos.sr@ada95.com> writes:

> It's probably better to use an instantiation of Text_IO.Float_IO.Put...

Since subtype Float was being used, a better choice may be the
predefined package Ada.Float_Text_IO, which was specifically intended to
remove the entry barrier for neophyte Ada programmers.

A very subtle point: Float_Text_IO is _not_ an instantiation of
Text_IO.Float_IO.  It takes Float parameters, and looks just like an
instantiation of Float_IO, but it is not actually an instantiation of
Float_IO.

Which mostly means if you have this:

generic
  type Float_Type is digits <>;
  with package P is new Ada.Text_IO.Float_IO (Float_Type);
package GQ is ...

then the following instantiation

package Q is new GQ (Float, Float_Text_IO);

is illegal.