R_altrep_inherits

extendr_ffi::altrep

Function R_altrep_inherits 

Source 
pub unsafe extern "C" fn R_altrep_inherits(
    x: SEXP,
    arg1: R_altrep_class_t,
) -> Rboolean
Expand description

Returns a nonzero value if x is an ALTREP value whose class pointer is class.