[R] loading precedence in requires()

[Ray Brownrigg]

It appears that requires(), when it appears in the .First.lib of a
package, will load the required package *after* the package requiring
it, i.e. the 'required' package appears earlier in the search list than
the package requiring it.

This will cause problems if a package (deliberately) masks any of the
functions in the required package. I.e. the expected masking does not
occur.

Apart from expecting the end-user to issue a library() call for the
required package before the requiring package, are there any
workarounds for this, or is such deliberate masking considered to be a
no-no?

Ray Brownrigg
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