is_filter

Returns <code>TRUE</code> for any R object that can be used as a Filter
for Loggers or, Appenders:<ul>
<li>a <code>function</code> with the single argument <code>event</code>;</li>
<li>an EventFilter <a href="https://r6.r-lib.org/reference/R6Class.html">R6::R6</a> object; or</li>
<li>any object with a <code>$filter(event)</code> method.</li>
</ul>Note: A Filter must return a scalar <code>TRUE</code> or <code>FALSE</code>, but this
property cannot be checked by <code>is_filter()</code>.

A flexible, feature-rich yet light-weight logging
framework based on 'R6' classes. It supports hierarchical loggers,
custom log levels, arbitrary data fields in log events, logging to
plaintext, 'JSON', (rotating) files, memory buffers. For extra
appenders that support logging to databases, email and push
notifications see the the package lgr.app.

Stefan Fleck

A Fully Featured Logging Framework

is_filter function

<dl><dt>x</dt>
<dd>any R Object</dd></dl>

Arguments

Returns <code>TRUE</code> for any R object that can be used as a Filter
for Loggers or, Appenders:<ul>
<li>a <code>function</code> with the single argument <code>event</code>;</li>
<li>an EventFilter <a href='https://r6.r-lib.org/reference/R6Class.html'>R6::R6</a> object; or</li>
<li>any object with a <code>$filter(event)</code> method.</li>
</ul>

Note: A Filter must return a scalar <code>TRUE</code> or <code>FALSE</code>, but this
property cannot be checked by <code>is_filter()</code>.

Check if an R Object is a Filter — is_filter

<dl>

<dt>x</dt>
<dd>any R Object</dd>

</dl>

is_filter: Check if an R Object is a Filter

Description

Usage

Value

Arguments

See Also