checkChoice: Check if an object is an element of a given set
Description
Check if an object is an element of a given set
Usage
checkChoice(x, choices)
assertChoice(x, choices, .var.name)
testChoice(x, choices)
Arguments
x
[ANY]
Object to check.
.var.name
[character(1)]
Name for x. Defaults to a heuristic to determine
the name using deparse and substitute.
choices
[atomic]
Set of possible values.
Value
Depending on the function prefix:
If the check is successful, all functions return TRUE.
If the check is not successful, assertChoice throws an error message,
testChoice returns FALSE and checkChoice returns
a string with the error message.