[Rd] combine UserDefinedDatabase and regular environments

[Romain Francois]

Hello,

Is it possible to have the effect of UserDefinedDatabase outside of 
"attached" environments ? Can I disguise an environment of the 
sys.frames() as a UserDefinedDatabase ?

This seems to suggest that it might be possible :

 > f <- function(){ e <- environment(); class(e) <- 
"UserDefinedDatabase"; ff }
 > f()

  *** caught segfault ***
address (nil), cause 'unknown'

Traceback:
  1: f()

Possible actions:
1: abort (with core dump, if enabled)
2: normal R exit
3: exit R without saving workspace
4: exit R saving workspace


At the moment, it seems to be either lookup using UserDefinedDatabase or 
regular lookup. Has anyone tried to combine both ?


-- 
Romain Francois
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