Packages

c

net.totietje.evaluator

AbstractTokenizer

abstract class AbstractTokenizer[R] extends Tokenizer[R]

Source
AbstractTokenizer.scala
Linear Supertypes
Tokenizer[R], AnyRef, Any
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  2. Tokenizer
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Instance Constructors

  1. new AbstractTokenizer()

Abstract Value Members

  1. abstract def parseAfterValueChar(char: Char): Option[Token[R]]

    Determines if the character represents a token that comes after a value or close parenthesis.

    Determines if the character represents a token that comes after a value or close parenthesis.

    Operators belong here, as they come after values (for example, in 2 + 3 the + comes after the 2). Close parentheses also belong here, as do argument separators.

    In order to determine if a special character belongs here, ask yourself 'Would it make sense after a constant?'. If the answer is yes, it belongs here.

    char

    A character in the expression being parsed

    returns

    None if the input is not a special character, or the character does not belong after a value. Some(Token) otherwise, where the token represents the character's purpose.

    Attributes
    protected
  2. abstract def parseOtherChar(char: Char): Option[Token[R]]

    Determines if the character represents a token that 1) comes after an operator, 2) comes after a function, 3) follows an open parenthesis, or 4) is at the start of an expression.

    Determines if the character represents a token that 1) comes after an operator, 2) comes after a function, 3) follows an open parenthesis, or 4) is at the start of an expression. start of an expression.

    Unary operators must be defined here, as they come after operators. The unary operator token must be a Function token. A character can be both a binary operator (one that works on two operands) and a unary operator (one that works on one operand), however, they must have distinct tokens.

    Open parentheses also belong here, as they come after operators (for example, 2 * (3 + 4)) or functions (sin(2)). However, close parentheses do not, instead, they belong in the parseAfterValueChar method.

    In order to determine if a special character belongs here, ask yourself 'Would it make sense at the start of an expression?' If the answer is yes, it belongs here.

    char

    A character in the expression being parsed

    returns

    None if the input is not a special character, or does not belong in the specified positions.

    Attributes
    protected
  3. abstract def parseWord(word: String): Token[R]

    Parses a possible word.

    Parses a possible word.

    word

    The word to parse

    returns

    The token representation of the word

    Attributes
    protected
    Exceptions thrown

    net.totietje.evaluator.EvaluationException If the input string is not a valid word

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
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  3. final def ==(arg0: Any): Boolean
    Definition Classes
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  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[java.lang]
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    @throws( ... )
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
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  7. def equals(arg0: Any): Boolean
    Definition Classes
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  8. def finalize(): Unit
    Attributes
    protected[java.lang]
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    @throws( classOf[java.lang.Throwable] )
  9. final def getClass(): Class[_]
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  10. def hashCode(): Int
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  11. final def isInstanceOf[T0]: Boolean
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  12. final def ne(arg0: AnyRef): Boolean
    Definition Classes
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  13. final def notify(): Unit
    Definition Classes
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  14. final def notifyAll(): Unit
    Definition Classes
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  15. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
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  16. def toString(): String
    Definition Classes
    AnyRef → Any
  17. final def tokenize(expression: String): Seq[Token[R]]

    Transforms an expression into a list of tokens.

    Transforms an expression into a list of tokens.

    expression

    The input string to parse

    returns

    An array of tokens containing the information needed to evaluate it

    Definition Classes
    AbstractTokenizer → Tokenizer
    Exceptions thrown

    net.totietje.evaluator.EvaluationException If the input string contains an invalid token

  18. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  19. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
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    @throws( ... )
  20. final def wait(arg0: Long): Unit
    Definition Classes
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    @throws( ... )

Inherited from Tokenizer[R]

Inherited from AnyRef

Inherited from Any

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