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  2. RPG400-L
  3. March 2012

Re: passing parameters longer than expected

Le 27 mars 2012 23:44, Barbara Morris <bmorris@xxxxxxxxxx> a écrit :

For a prototyped parameter passed by reference (no CONST or VALUE),
Err.. doesn't CONST mean passed by reference?


the
compiler doesn't complain about a fixed length passed parameter being
longer than the fixed length prototyped parameter. It only cares about
the passed parameter being shorter.

As Scott pointed out earlier, the problem being that the called
procedure could access some bad data.


When we added support for prototyped parameters, we were mainly
concerned with data corruption, which isn't possible with too-long
parameters. After 15+ years of reflection, I think we were perhaps a bit
short-sighted not to also worry about data loss, and maybe should have
required *VARSIZE for any reference-parameter mismatch.

I'm happy with that statement!

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