Core class to create and handle issues.
ruleRules to perform checks, must be functions that accept a single argument and return a boolean.
messageThe message (warning or error).
callExpression or function (as string) that led to the issue.
raiserFunction to run when the raise method
is called. By default the error uses stop() and warning
uses warning(). The function must accept a single argument:
the error message (character vector).
new()Issue$new(obj, type = c("error", "warning"))objA character string or an object of
class error, or warning.
typeType of message.
Initialise
print()Issue$print()
Print message of error or warning.
return()Issue$return(n = 1)
nthe number of generations to go back, passed to
parent.frame().
Return Returns self from parent function.
addRule()Issue$addRule(fn)
fnFunction defining rule, must accept a single argument and return a boolean.
Add a rule
check()Issue$check(obj)
objObject to check by rules
Add a predicate
raise()Issue$raise(fn = NULL)
fnA function to use to raise the issue.
Raise error or warning
clone()The objects of this class are cloneable with this method.
Issue$clone(deep = FALSE)
deepWhether to make a deep clone.