[R] Can the environment of a function be specified when the function is defined?

[Frederic F]

Hello, 

Is there a syntax to set the environment of a function when this function is
defined? 

The best I could come up with so far is using a wrapper function:

foo_internals<- function(x) {"Code of the function"}

foo<- function(x) {
  environment(foo_internals)<-as.environment(target_environment)
  foo_internals(x)
}

But I would like to know if there is a cleaner syntax.

There are two reasons why I would like to have a function defined with an
environment different then the local one:
The first is to develop a function that will go in a package: there might be
more things loaded in my R_GlobalEnv than what will be available to the
function when its environment will be the namespace of the package, so I
would like to restrict right away the environment of the function that I
develop in my local enviroment to what will be their environment in 'real
life'.  
The other reason would be to have a function written in a package act as if
it was from another package by giving it the environment of this other
package. 

Thanks for your suggestions and comments,

Frederic

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