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From: eachus@spectre.mitre.org (Robert I. Eachus)
Subject: Re: get_line
Date: 1998/06/18
Message-ID: <EACHUS.98Jun18151436@spectre.mitre.org>#1/1
X-Deja-AN: 363951610
References: <Pine.OSF.3.95.980605111447.22858A-100000@esus.cs.montana.edu>
 <6lbg7h$nnv$1@goanna.cs.rmit.edu.au> <m3zpfqu68v.fsf@mheaney.ni.net>
Organization: The Mitre Corp., Bedford, MA.
Newsgroups: comp.lang.ada
Date: 1998-06-18T00:00:00+00:00
List-Id: <comp.lang.ada>


In article <m3zpfqu68v.fsf@mheaney.ni.net> Matthew Heaney <matthew_heaney@acm.org> writes:

 > The test to make sure all of the text on the line has been
 > consumed is

 >    Last < Input_Buffer'Last

 > which means "you have read all the text on the current line."

 > To use this predicate, you'll have to make your buffer size 1 more than
 > the advertised maximum.

   There is another (non-obvious) way to do this which doesn't require
the odd buffer size:

   Text_IO.Get_Line(Some_Buffer,Length);
   if Ada.Text_IO.Col(Ada.Text_IO.Current_Input) /= 1
   then -- Skip Line was not called.
     Ada.Text_IO.Skip_Line;
   end if;
 
   This always works, assuming that the buffer is of non-zero length,
because Skip_Line always sets the column to one.  (Incidently there is
a typographic error in the RM at A.10.5(27), at least in the versions
I have.  The indentation is incorrect. The paragraph should be
outdented to full width as it is in Ada 83 RM 14.3.4(26).)
--

					Robert I. Eachus

with Standard_Disclaimer;
use  Standard_Disclaimer;
function Message (Text: in Clever_Ideas) return Better_Ideas is...