InterfaceCondition-class

InterfaceError-class

InterfaceWarning-class

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 <code>"InterfaceError"</code> and
issue a warning for <code>"InterfaceWarning"</code>.

Support for interfaces from R to other languages,
built around a class for evaluators and a combination of functions, classes and
methods for communication. Will be used through a specific language interface
package. Described in the book "Extending R".

John M Chambers

A Structure for Interfaces from R

InterfaceCondition-class function

<dl class="dl-horizontal">
<dt><code>message</code></dt><dd>The character string message from the server language evaluator.</dd></dl><dt><code>value</code></dt><dd>In the case of a warning, the object to return after issuing the condition.</dd><dt><code>expr</code></dt><dd>The expression sent to the server language that produced the condition.</dd><dt><code>evaluator</code></dt><dd>The interface evaluator object receiving the condition.</dd>

InterfaceCondition-class: Classes of objects representing errors or other conditions in a server language

Description

Arguments

Slots

References