Validate

The Validate class is a Reference Class to help programming validation for new S4 classes.

Details

Starting from an empty msg vector, with each check that is returning FALSE the vector gets a new element - the string explaining the failure of the validation.

Fields

msg

(character)
the cumulative messages.

Methods

check(test, string = "")

Check whether the test is TRUE; if so, return NULL. Otherwise, add the string message into the cumulative messages vector msg.

result()

Return either cumulative messages vector msg (which contains the error messages from all the checks), or NULL, if msg is empty (i.e. all the checks were successful).