assert_varval_list: Is an Argument a Variable-Value List?
In epijim/admiral: ADaM in R Asset Library

Description Usage Arguments Author(s) Examples

Checks if the argument is a list of quosures where the expressions are variable-value pairs. The value can be a symbol, a string, a numeric, or NA. More general expression are not allowed.

assert_varval_list(
  arg,
  required_elements = NULL,
  accept_expr = FALSE,
  accept_var = FALSE,
  optional = FALSE
)

`arg`	A function argument to be checked
`required_elements`	A `character` vector of names that must be present in `arg`
`accept_expr`	Should expressions on the right hand side be accepted?
`accept_var`	Should unnamed variable names (e.g. `vars(USUBJID)`) on the right hand side be accepted?
`optional`	Is the checked parameter optional? If set to `FALSE` and `arg` is `NULL` then an error is thrown.

Stefan Bundfuss, Thomas Neitmann

example_fun <- function(vars) {
  assert_varval_list(vars)
}
example_fun(vars(DTHDOM = "AE", DTHSEQ = AESEQ))

try(example_fun(vars("AE", DTSEQ = AESEQ)))