Function t_str_set_elt 

pub unsafe extern "C-unwind" fn t_str_set_elt<T: AltString>(
    x: SEXP,
    i: R_xlen_t,
    v: SEXP,
)

Trampoline for string Set_elt method.

Safety

x must be a valid ALTREP STRSXP and v a valid CHARSXP.