r - vec_c not called when vctrs object is not the first argument in c()

Question

I'm trying to build a new vector class in R with the vctrs package and can not get c() to work correctly. c(my_vector_class, character()) correctly calls vec_c, but c(character(), my_vector_class) ignores any and all vctrs coersion rules I am trying to implement.

Is it generally impossible to control coersion with c() when the new class is not the first argument, or should I keep trying to debug this?

It says in the vignette: "You’ll also get mostly correct behaviour for c(). The exception is when you use c() with a base R class". Does that mean that there's no way to control the behaviour of c(some_base_class, ,my_vctrs_class)?

Thank you

question from:https://stackoverflow.com/questions/66052949/vec-c-not-called-when-vctrs-object-is-not-the-first-argument-in-c

Answer 1

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