dot-stabilize_cls_scalar: Stabilize a scalar object of a specific class
In stbl: Stabilize Function Arguments

.stabilize_cls_scalar

R Documentation

Stabilize a scalar object of a specific class

Description

A helper used by the ⁠stabilize_*_scalar()⁠ functions to provide a standard set of checks.

Usage

.stabilize_cls_scalar(
  x,
  to_cls_scalar_fn,
  ...,
  to_cls_scalar_args = list(),
  check_cls_value_fn = NULL,
  check_cls_value_fn_args = list(),
  allow_null = TRUE,
  allow_zero_length = TRUE,
  allow_na = TRUE,
  x_arg = caller_arg(x),
  call = caller_env(),
  x_class = object_type(x)
)

Arguments

`x`	The argument to stabilize.
`to_cls_scalar_fn`	`⁠(function)⁠` The `⁠to_*_scalar()⁠` function to use for coercion.
`...`	Arguments passed to methods.
`to_cls_scalar_args`	`(list)` A list of additional arguments to pass to `to_cls_scalar_fn()`.
`check_cls_value_fn`	`⁠(function)⁠` A function to check the values of `x` after coercion.
`check_cls_value_fn_args`	`(list)` A list of additional arguments to pass to `check_cls_value_fn()`.
`allow_null`	`⁠(length-1 logical)⁠` Is NULL an acceptable value?
`allow_zero_length`	`⁠(length-1 logical)⁠` Are zero-length vectors acceptable?
`allow_na`	`⁠(length-1 logical)⁠` Are NA values ok?
`x_arg`	`⁠(length-1 character)⁠` An argument name for x. The automatic value will work in most cases, or pass it through from higher-level functions to make error messages clearer in unexported functions.
`call`	`(environment)` The execution environment to mention as the source of error messages.
`x_class`	`⁠(length-1 character)⁠` The class name of `x` to use in error messages. Use this if you remove a special class from `x` before checking its coercion, but want the error message to match the original class.