Package com.google.javascript.rhino

Enum Outcome

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Comparable<Outcome>
    public enum Outcome
extends java.lang.Enum<Outcome>
    An enum for representing truthiness and nullishness of outcomes. The values are TRUE, FALSE, FALSE_NOT_NULL, and NULLISH. FALSE represents all falsy values so it contains both FALSE_NOT_NULL and NULLISH. It specifically differentiates between falsy and explicitly nullish values. e.g. 0 is falsy but not nullish.

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description
      FALSE
      Represents falsy values.
      FALSE_NOT_NULL  
      NULLISH  
      TRUE
      Represents truthy values.

    • Method Summary

      All Methods Static Methods Instance Methods Abstract Methods Concrete Methods 
      Modifier and Type Method Description
      static Outcome forBoolean​(boolean val)
      Gets the Outcome for the given boolean.
      abstract Tri isNullish()
      Determines whether an Outcome enum value is nullish.
      abstract boolean isTruthy()
      Determines whether an Outcome enum value is truthy.
      abstract Outcome not()
      Gets the not of this.
      static Outcome valueOf​(java.lang.String name)
      Returns the enum constant of this type with the specified name.
      static Outcome[] values()
      Returns an array containing the constants of this enum type, in the order they are declared.

      • Methods inherited from class java.lang.Enum

        clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

      • Methods inherited from class java.lang.Object

        getClass, notify, notifyAll, wait, wait, wait

    • Enum Constant Detail

      • TRUE

        public static final Outcome TRUE
        Represents truthy values. For example: {}, true, 1, etc.

      • FALSE

        public static final Outcome FALSE
        Represents falsy values. For examples: '', 0, false, null, etc.

      • FALSE_NOT_NULL

        public static final Outcome FALSE_NOT_NULL

      • NULLISH

        public static final Outcome NULLISH

    • Method Detail

      • values

        public static Outcome[] values()
        Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows: 
        for (Outcome c : Outcome.values())
    System.out.println(c);
        Returns:
        an array containing the constants of this enum type, in the order they are declared

      • valueOf

        public static Outcome valueOf​(java.lang.String name)
        Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
        Parameters:
        name - the name of the enum constant to be returned.
        Returns:
        the enum constant with the specified name
        Throws:
        java.lang.IllegalArgumentException - if this enum type has no constant with the specified name
        java.lang.NullPointerException - if the argument is null

      • isTruthy

        public abstract boolean isTruthy()
        Determines whether an Outcome enum value is truthy.

      • isNullish

        public abstract Tri isNullish()
        Determines whether an Outcome enum value is nullish. Using Tri instead of a boolean because 0 is Outcome.FALSE but not nullish so sometimes it is unclear.

      • not

        public abstract Outcome not()
        Gets the not of this.

      • forBoolean

        public static Outcome forBoolean​(boolean val)
        Gets the Outcome for the given boolean.