InterfaceCondition-class {XR}

Classes of objects representing errors or other conditions in a server language

Description

Errors and warnings generated in evaluating an expression in the server language will be returned to R as objects from one of these classes. The interface evaluator will normally throw an error for "InterfaceError" and issue a warning for "InterfaceWarning".

Slots

message

The character string message from the server language evaluator.

value

In the case of a warning, the object to return after issuing the condition.

expr

The expression sent to the server language that produced the condition.

evaluator

The interface evaluator object receiving the condition.

References

Chambers, John M. (2016) Extending R, Chapman & Hall/CRC. ( Chapter 13, discussing this package, is included in the package: ../doc/Chapter_XR.pdf.)