Function LENGTH_unchecked 

pub unsafe extern "C-unwind" fn LENGTH_unchecked(x: SEXP) -> c_int

Get the length of a SEXP as int (for short vectors < 2^31).

For long vectors, use Rf_xlength() instead. Returns 0 for R_NilValue. Unchecked FFI binding for LENGTH. Generated from source location line 611, column 12. Generated from source file miniextendr-api/src/sys.rs.