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Date: Thu, 03 Sep 2009 12:39:13 +0200
From: Georg Bauhaus <rm.dash-bauhaus@futureapps.de>
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Subject: Re: Ada Shootout program for K-Nucleotide (patches)
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Ole-Hjalmar Kristensen schrieb:
>>>>>> "GB" == Georg Bauhaus <rm.tsoh.plus-bug.bauhaus@maps.futureapps.de> writes:

>     GB> It looks like copying In_Buf(Start..I-1) be circumvented.
>     GB> I have added a solution to Line_IO.
> 
> How did you avoid the copying?

Only in the non-recursive case, and only "inside" the subprogram, by
renaming the slice in question and then either

- create an overlay where some string object (of a subtype
  with the needed bounds)   uses the renamed slice
  as storage.  (Perhaps use Unchecked_Conversion if Randy's
  comments on Gem #39 suggest it.)  Or,

- convert said renamed slice to a string subtype with
  proper bounds.

I'm still struggling (in spare free time) with long lines
with or without terminators, proper End_Error (to mimick
Text_IO.Get_Line's behavior), terminal I/O, and recursion.


(An interesting test case (from a still open Python
bug) is this:

$ cat | ./line_reading_program
asdf
^D

$ ./line_reading_program
asdf
^D