Also note at the beginning of of th help file:
Utility functions to access and replace the non-exported functions
in a name space, for use in developing packages with name spaces.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This is intended only as a developer convenience, not as something to
be used in production code. It is quite deliberate the name spaces are
intended to be read-only once created. This allows the compiler to
make assumptions about functions/constants defined in a name space.
For now the compiler only uses this infomation for the base packages,
but that could change in the future.
Best,
luke
On Tue, 31 May 2011, Romain Francois wrote:
Le 31/05/11 12:01, Prof Brian Ripley a écrit :
On Tue, 31 May 2011, Prof Brian Ripley wrote:
On Tue, 31 May 2011, Romain Francois wrote:
Hello,
assignInNamespace refuses to assign an object to a name that is not
already used in the namespace.
That's intentional, and as documented:
‘assignInNamespace’ and ‘fixInNamespace’ are invoked for their
side effect of changing the object in the name space.
^^^^^^^^
I very much doubt we want to allow adding objects.
Even clearer, the Note says
They can only be used to change the values of objects in the name
space, not to create new objects.
Sure.
I'll just keep using this small workaround, unexported from the next Rcpp:
# just like assignInNamespace but first checks that the binding exists
forceAssignInNamespace <- function( x, value, env ){
is_ns <- isNamespace( env )
if( is_ns && exists( x, env ) && bindingIsLocked(x, env ) ){
unlockBinding( x, env )
}
assign( x, value, env )
if( is_ns ){
lockBinding( x, env )
}
}
I find this useful for when a package wants to assign in its own namespace.
Romain
Something like this would make it possible:
--- src/library/utils/R/objects.R (revision 56024)
+++ src/library/utils/R/objects.R (working copy)
@@ -252,8 +252,9 @@
stop("environment specified is not a package")
ns <- asNamespace(substring(nm, 9L))
} else ns <- asNamespace(ns)
- if(bindingIsLocked(x, ns)) {
- unlockBinding(x, ns)
+ new_binding <- !exists(x,ns)
+ if( new_binding || bindingIsLocked(x, ns)) {
+ if(!new_binding) unlockBinding(x, ns)
assign(x, value, envir = ns, inherits = FALSE)
w <- options("warn")
on.exit(options(w))
Romain
--
Romain Francois
Professional R Enthusiast
+33(0) 6 28 91 30 30
http://romainfrancois.blog.free.fr
http://romain-francois.com
|- http://bit.ly/hdKhCy : Rcpp article in JSS
|- http://bit.ly/elZJRJ : Montpellier Comedie Club - Avril 2011
`- http://bit.ly/fhqbRC : Rcpp workshop in Chicago on April 28th
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--
Brian D. Ripley, [email protected]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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Luke Tierney
Statistics and Actuarial Science
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa Phone: 319-335-3386
Department of Statistics and Fax: 319-335-3017
Actuarial Science
241 Schaeffer Hall email: [email protected]
Iowa City, IA 52242 WWW: http://www.stat.uiowa.edu
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