Validate | R Documentation |
Validate
The Validate
class is a Reference Class
to help programming validation for new S4 classes.
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.
msg
(character
)
the cumulative messages.
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).
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