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## de.grogra.xl.lang
Interface ObjectToBoolean<K>

All Known Subinterfaces:
  NodeFilter<T>

All Known Implementing Classes:
  DTDSourceFile, ExplorerMenuBuilder, MTGSourceFile, SourceFile

    public interface ObjectToBoolean<K>

Instances of `ObjectToBoolean` represent functions which take `K`s as input and return values of type `boolean`. Such instances are created by lambda expressions of the XL programming language, e.g., `ObjectToBoolean f = K x => boolean` some expression containing x`;`.

Author:
  Ole Kniemeyer

Method Summary
`boolean` | `evaluateBoolean(K x)` Computes the value of this function at `x`.

Method Detail

### evaluateBoolean

    boolean evaluateBoolean(K x)

  Computes the value of this function at `x`.

  Parameters:
    `x` - where the function is to be evaluated
  Returns:
    function value at `x`

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