Revision dc000f2a5f006d137f66716b086025d618bf8306 authored by John M Chambers on 14 July 2008, 00:00:00 UTC, committed by Gabor Csardi on 14 July 2008, 00:00:00 UTC
1 parent 635622b
searchList.R
e1 = new.env()
assign("f", function(x)"f1", envir = e1)
e3 = new.env()
assign("g", function(x)f(x), envir = e3)
attach(e1)
attach(e3)
## Our intention is that g() calls f() in e1
g(1) #OK
## But now a new version of f() appears
e2 = new.env()
assign("f", function(x)"f2", envir = e2)
attach(e2)
search()
g(1)
## Because of search list position, the wrong function was called
## Furthermore, even having f() in the same environment as g() doesn't help:
assign("f", function(x)"f3", envir = e3)
objects(3)
detach(3)
attach(e3, pos=3)
g(1)
## And the same danger exists if the call to f() is from within the environment
assign("h", function(x)g(x), envir = e3)
detach(3)
attach(e3, pos=3)
h(1)
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