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From: Victor Porton <porton@narod.ru>
Newsgroups: comp.lang.ada
Subject: Re: Need a way to convert a constant to a variable
Date: Sat, 05 Aug 2017 20:45:26 +0300
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Date: 2017-08-05T20:45:26+03:00
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Dmitry A. Kazakov wrote:

> On 2017-08-05 17:11, Victor Porton wrote:
> 
>> I do use char_array for interfacing with C.
> 
> You should probably reconsider it. It works only for C functions that do
> not expect null as a value, do not return strings allocated outside Ada,
> do not deallocate strings passed into.

I use an indefinite holder with char_array inside to represent a C string 
(whose length size_t value ('Length in Ada) I pass separately to a C 
function), which may be either a real string (corresponding to char_array) 
or NULL (corresponding to empty indefinite handler).

Note that the above is NOT related to NUL-terminated strings.

>> It is a pity that I need to reimplement Indefinite_Holders for this task.


-- 
Victor Porton - http://portonvictor.org