Ada arrays - a problem with aggregate notation.

Ada arrays - a problem with aggregate notation.

[jagorak]

Hi,

The  GDB  manual  (Ninth  Edition,  for  gdb  version 6.6.50.20070317)
section 12.4.6.2 says:

== quote ==
There is limited support for [Ada] array and record aggregates. They are
permitted only on the right sides of assignments, as in these examples:
       set An_Array := (1, 2, 3, 4, 5, 6)
(...)
== end quote ==

The problem is, whenever I try to assign values to elements of an
array using the aggregate notation (e.g. (1, 2, 3, 4, 5, 6) as in example
above), I'm getting an error message like this one:
       A syntax error in expression, near ` 2, 3, 4, 5, 6)'.

Setting values of individual elements does work
       set An_Array(1) := 1
       set An_Array(2) := 55
       etc.

but using aggregate would be far more convenient...

I have no idea what I might be doing wrong here / what limitation
prevents me from using an aggregate notation.

Any ideas please?

Many thanks,
Jan

Re: Ada arrays - a problem with aggregate notation.

[Joel Brobecker]

> == quote ==
> There is limited support for [Ada] array and record aggregates. They are
> permitted only on the right sides of assignments, as in these examples:
>        set An_Array := (1, 2, 3, 4, 5, 6)
> (...)
> == end quote ==

Hmmm, I think the documentation might be inaccurate. We implemented
support for array aggregates only recently (about a year ago), and
it required a relatively large change. Unfortunately, we're not
contributing our changes in terms of the Ada mode as fast as we'd like,
so it hasn't made it to the FSF yet. We will get to it eventually.

In the meantime, if you'd like to debug Ada, you might want to have
a look at building our version of GDB: It has the latest Ada support
in it: https://libre.adacore.com/GDB/.

-- 
Joel

Re: Ada arrays - a problem with aggregate notation.

[Eli Zaretskii]

> Date: Sat, 24 Mar 2007 22:05:44 -0400
> From: Joel Brobecker <brobecker@adacore.com>
> Cc: gdb@sourceware.org, Paul Hilfinger <hilfinger@adacore.com>
> 
> > == quote ==
> > There is limited support for [Ada] array and record aggregates. They are
> > permitted only on the right sides of assignments, as in these examples:
> >        set An_Array := (1, 2, 3, 4, 5, 6)
> > (...)
> > == end quote ==
> 
> Hmmm, I think the documentation might be inaccurate.

What would be the accurate way of describing the current support?

Re: Ada arrays - a problem with aggregate notation.

[Joel Brobecker]

> > > There is limited support for [Ada] array and record aggregates. They are
> > > permitted only on the right sides of assignments, as in these examples:
> > >        set An_Array := (1, 2, 3, 4, 5, 6)
> > > (...)
> > > == end quote ==
> > 
> > Hmmm, I think the documentation might be inaccurate.
> 
> What would be the accurate way of describing the current support?

Actually, I take that back, I tried on a simple example, and the
assignment went smoothly. I'm pretty busy these days, but if Jan
could send more details, I'll do my best to look at this (sources,
build command, platform, GDB version, and a copy/paste of the GDB
session).

-- 
Joel

Re[2]: Ada arrays - a problem with aggregate notation.

[jagorak]

JB> Actually, I take that back, I tried on a simple example, and the
JB> assignment went smoothly. I'm pretty busy these days, but if Jan
JB> could send more details, I'll do my best to look at this (sources,
JB> build command, platform, GDB version, and a copy/paste of the GDB
JB> session).

Ah...  a  hundred apologies! - my mistake. Yes - the assignments using
aggregates  work  fine.  After your post Joel I realized that I was
using   version  6.3 of the GDB (which I was not aware of at the time,
even though I quoted exact version of the manual in my original post...).

I've just tried with version 6.5 and everything works fine and I'm
sure it will be the case with 6.6.


Many thanks,
Jan