is_filter: Check if an R Object is a Filter

In lgr: A Fully Featured Logging Framework

Check if an R Object is a Filter

Description

Returns TRUE for any R object that can be used as a Filter for Loggers or, Appenders:

• a function with the single argument event;

• an EventFilter R6::R6 object; or

• any object with a ⁠$filter(event)⁠ method.

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

Usage

is_filter(x)

Arguments

x	any R Object

Value

TRUE or FALSE

See Also

EventFilter, Filterable

lgr documentation built on Aug. 8, 2025, 6:10 p.m.