in standalone-types-check,check_number_whole() min and max don't accept integer.

[olivroy]

rlang:::check_number_whole(2, max = 3L)
#> Error 
#> ! `max` must be a single double value.

But my use case was that max = length(something) which is integer, and triggered this unfriendly error.

Is there something rlang can do that will not affect performance.

For what it's worth, I think it would still be valid to accept integer for check_number_decimal() too.

[olivroy]

I investigated a bit further and saw that it is part of a TODO item in the C core.

double r_arg_as_double(r_obj* x, const char* arg) {
  // TODO: Coercion of int and lgl values
  if (!_r_is_double(x, 1, -1)) {
    r_abort("`%s` must be a single double value.", arg);
  }
  return r_dbl_get(x, 0);
}

Where should the conversion happen?

In R, it would just be

if (is.integer(x)) {
 x <- as.numeric(x)
}

But I don't know how to make that happen in C...