[R] cyclic dependency when building a package

[Martin Morgan]

On 11/30/2014 07:15 AM, Glenn Schultz wrote:
> Hi All,
>
> I am working on a package BondLab for the analysis of fixed income securities.  Building the package results in the following:
>
> Error in loadNamespace(package, c(which.lib.loc, lib.loc)) :
> cyclic namespace dependency detected when loading ‘BondLab’, already loading ‘BondLab’
>
>
> It occurs when I set the generic for the function mortgagecashflow.  Further if a function uses mortgagecashflow, similarly its generic, when set, causes the above error.  Other generics do not throw this error so I am quite sure it is mortgagecashflow.  The package and the code can be found on github.
> https://github.com/glennmschultz/BondLab.git
>
> I have been trying to figure this out for a couple of months to no avail. If anyone has familiarity with this issue I would certainly appreciate any help with the issue.
>

Hi Glenn --

The root of the problem is that you are defining both a generic and a 
plain-old-function named MortgageCashFlow -- one or the other and you're fine.

R CMD INSTALL pkgA, where pkgA contains a single R file R/test.R

setGeneric("foo", function(x, ...) standardGeneric("foo"))
foo <- function(x, ...) {}

also generates this; maybe you meant something like

.foo <- function(x, ...) {}
setGeneric("foo", function(x, ...) standardGeneric("foo"),
            useAsDefault=".foo")

or simply reversing the order of the declarations

foo <- function(x, ...) {}
setGeneric("foo", function(x, ...) standardGeneric("foo"))


?

Martin Morgan

> Thanks,
> Glenn
>
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