R/util_assert.R

In vimc/orderlyweb: Orderly Support for 'OrderlyWeb'

assert_scalar <- function(x, name = deparse(substitute(x))) {
  if (length(x) != 1) {
    stop(sprintf("'%s' must be a scalar", name), call. = FALSE)
  }
}


assert_character <- function(x, name = deparse(substitute(x))) {
  if (!is.character(x)) {
    stop(sprintf("'%s' must be character", name), call. = FALSE)
  }
}


assert_integer <- function(x, strict = FALSE, name = deparse(substitute(x)),
                           what = "integer") {
  if (!(is.integer(x))) {
    usable_as_integer <-
      !strict && is.numeric(x) && (max(abs(round(x) - x)) < 1e-8)
    if (!usable_as_integer) {
      stop(sprintf("'%s' must be %s", name, what), call. = FALSE)
    }
  }
  invisible(x)
}


assert_logical <- function(x, name = deparse(substitute(x))) {
  if (!is.logical(x)) {
    stop(sprintf("'%s' must be logical", name), call. = FALSE)
  }
}


assert_scalar_logical <- function(x, name = deparse(substitute(x))) {
  assert_scalar(x, name)
  assert_logical(x, name)
}


assert_scalar_character <- function(x, name = deparse(substitute(x))) {
  assert_scalar(x, name)
  assert_character(x, name)
}


assert_scalar_integer <- function(x, strict = FALSE,
                                  name = deparse(substitute(x))) {
  assert_scalar(x, name)
  assert_integer(x, strict, name)
}