Packages

abstract class Evaluator[R] extends AnyRef

An Evaluator is a string parser and evaluator.

This class is flexible, allowing a user to define their own syntax. An example use might be to parse maths expressions, such as (1 + 2) ^ 3.

R

What the string should be evaluated to

Source
Evaluator.scala
See also

ComplexEvaluator

Linear Supertypes
AnyRef, Any
Known Subclasses
ComplexEvaluator, AbstractEvaluator
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. Evaluator
  2. AnyRef
  3. Any
  1. Hide All
  2. Show All
Visibility
  1. Public
  2. All

Instance Constructors

  1. new Evaluator()

Abstract Value Members

  1. abstract def tokenize(expression: String): Array[Token[R]]

    Converts an expression into an array of Tokens.

    Converts an expression into an array of Tokens.

    Each token has an assigned meaning. See the Token for more detail on how to create a token instance with a certain meaning.

    expression

    The input string to parse

    returns

    An array of tokens containing the information needed to evaluate it

    Attributes
    protected
    Exceptions thrown

    net.totietje.evaluator.EvaluationException If there is an invalid token

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  8. final def evaluate(expression: String): R

    Parses a string.

    Parses a string.

    First of all, this tokenizes the string using the abstract tokenize method, which must be overridden by the user. This transforms the string into an array of Tokens which represent the string in terms of its parts.

    Then, this evaluates the provided array of tokens as the user defines, producing a result of type R. For more information on how this happens, see Token.

    expression

    The input string to parse

    returns

    The result of parsing the input

    Exceptions thrown

    net.totietje.evaluator.EvaluationException If there is a syntax error in the expression

  9. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  10. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
  11. def hashCode(): Int
    Definition Classes
    AnyRef → Any
  12. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  13. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  14. final def notify(): Unit
    Definition Classes
    AnyRef
  15. final def notifyAll(): Unit
    Definition Classes
    AnyRef
  16. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  17. def toString(): String
    Definition Classes
    AnyRef → Any
  18. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  19. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  20. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from AnyRef

Inherited from Any

Ungrouped