Two 'Output questions

Hello everybody,

a) Is there any guarantee that 'Output is implemented like...?

   1. Write bounds/Tag
   2. Call to 'Write

I see that the containers provided with gnat gap 2005 have 'write redefined but not 'output. While I don't see reasons to use 'output on definite types (?), I'm guessing gnat does so because of a). I don't see any explanation in the RM, so if I'm right it may be still gnat-dependent. I suppose it's handy too to not have to redefine both 'Output and 'Write when the latter is enough.

b) Is there any way to call the default 'Output attribute once you have redefined it? The reason for this is that I have a variant record in which just one of the variations needs special treatment... I have ideas for workarounds but I'm now just curious.

Thanks!
.

Relevant Pages

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