Re: Ada Type Information

[Sam Carnicelli <samuel.charles.carnicelli@lmco.com>]

dennison@telepath.com wrote:
> 
> In article <36E03843.3AD74457@lmco.com>,
>   Sam Carnicelli <samuel.charles.carnicelli@lmco.com> wrote:
> 
> > a tool written in Java.  We basically need, given a record type, the
> > type starting bit
> > position, and length in bits of all fields of a record.  For instance,
> > given this record
> > definition:
> 
> If the record doesn't have a rep spec and size clause, this information is
> not defined by the language. Depending on what use you want to make of the
> information, that could be a major problem. A new version of the compiler
> would be well within its rights to add or remove padding, and to completely
> shuffle the order of the fields.

This is why I want to get the information from a product of the
compiler.  If a new
compiler were to change the layout of the record type, I would simply
have to rerun my tool to get the new information.  All of the methods I
have mentioned make use of products of the compiler.
 
> 
> If its important to you that fields be in a certian place with a certian size,
> you should use rep specs.
> 

It would be possible to force all types to be rep spec'd in order to use
them as input to the tool, but it should not be necessary.


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Sam Carnicelli
Lockheed Martin				Phone : 315-456-2881
Syracuse, NY 13221-4840			Fax   : 315-456-0107

e-mail: samuel.charles.carnicelli@lmco.com
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