NullGuardFilter

A filter, which forwards evaluation to the given filter, unless the input is null; in this case, the result will be nullResult.

The type the given filter accepts. This filter accepts its nullable form

TResult

The type filter returns

nullResult

The result when the input is null

filter

The filter to evaluate

Constructors

constructor(nullResult: FilterResult<TResult>, filter: Filter<T, TResult>)

open override fun evaluate(value: T?): FilterResult<out TResult>

Evaluates the filter with the given value.

open operator override fun iterator(): Iterator<Filter<T, TResult>>

open override fun toString(): String

Formats a filter chain as a tree with ASCII characters, and returns the formatted string.