Hello,
?delayedAssign presents substitute() as a way to look at the expression
in the promise. However,
msg <- "old"
delayedAssign("x", msg)
msg <- "new!"
x #- new!
substitute(x) #- x (was 'msg' ?)
Here, we just got 'x'... shouldn't we got 'msg'?
Same result when the promise is not evaluated yet:
delayedAssign("x", msg)
substitute(x)
In a function, that works:
foo <- function (x = msg) substitute(x)
foo()
Did I misunderstood something? It seems to me that substitute() does not
behaves as documented for promises created using delayedAssign().
Best,
Philippe
--
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) ) ) ) )
( ( ( ( ( Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( ( Numerical Ecology of Aquatic Systems
) ) ) ) ) Mons University, Belgium
( ( ( ( (
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