Ada version cheat sheet (2012 vs. 2005 vs. '95 ...) ?

Ada version cheat sheet (2012 vs. 2005 vs. '95 ...) ?

[julian.fondren]

Howdy,

For my personal development environments, Ada 2012 is totally fine, and
I know that some features I especially like require it ('with' pre/post
conditions, for some/all expressions), but it's come up that it might
benefit a project to be compileable by older compilers. For example,
CentOS 6 only offers an Ada 2005 package.

Is there a cheat sheet of the form, "in place of this Ada 2012
construct, you can use this Ada 2005 equivalent (or workaround)"?

Ada 2012:

   function getrusage (Who : Integer; Report : access RUsage) return Integer
      with Import => True, Convention => C, External_Name => "getrusage";

Ada 2005:

   function getrusage (Who : Integer; Report : access RUsage) return Integer;
   pragma Import (C, getrusage, "getrusage");

Or is my best bet to use an older compiler (or flag like -gnat05, where
available), and then look in older versions of the ARM for what fails?

Thanks.

Re: Ada version cheat sheet (2012 vs. 2005 vs. '95 ...) ?

[Jere]

On Monday, December 10, 2018 at 5:58:41 PM UTC-5, julian....@gmail.com wrote:
> Howdy,
> 
> For my personal development environments, Ada 2012 is totally fine, and
> I know that some features I especially like require it ('with' pre/post
> conditions, for some/all expressions), but it's come up that it might
> benefit a project to be compileable by older compilers. For example,
> CentOS 6 only offers an Ada 2005 package.
> 
> Is there a cheat sheet of the form, "in place of this Ada 2012
> construct, you can use this Ada 2005 equivalent (or workaround)"?
> 
> Ada 2012:
> 
>    function getrusage (Who : Integer; Report : access RUsage) return Integer
>       with Import => True, Convention => C, External_Name => "getrusage";
> 
> Ada 2005:
> 
>    function getrusage (Who : Integer; Report : access RUsage) return Integer;
>    pragma Import (C, getrusage, "getrusage");
> 
> Or is my best bet to use an older compiler (or flag like -gnat05, where
> available), and then look in older versions of the ARM for what fails?
> 
> Thanks.

Here is the one that comes to mind.  Haven't combed through it to verify 
everything:
https://www.ada2012.org/comparison.html

Re: Ada version cheat sheet (2012 vs. 2005 vs. '95 ...) ?

[Randy Brukardt]

...
> Is there a cheat sheet of the form, "in place of this Ada 2012
> construct, you can use this Ada 2005 equivalent (or workaround)"?

Closest thing I know of is this comparison chart:

http://www.adaic.org/advantages/ada-comp-chart/

but it's probably too coarse for your use.

                           Randy.

Re: Ada version cheat sheet (2012 vs. 2005 vs. '95 ...) ?

[mgr]

El 10/12/18 a las 23:58, julian.fondren@gmail.com escribió:

> Is there a cheat sheet of the form, "in place of this Ada 2012
> construct, you can use this Ada 2005 equivalent (or workaround)"?
> 

Not exactly what you asked for, but these might provide some help:

https://en.wikibooks.org/wiki/Ada_Programming/Ada_83
https://en.wikibooks.org/wiki/Ada_Programming/Ada_95
https://en.wikibooks.org/wiki/Ada_Programming/Ada_2005
https://en.wikibooks.org/wiki/Ada_Programming/Ada_2012