Package nz.org.riskscape.rl.ast

Class Constant

java.lang.Object
nz.org.riskscape.rl.ast.Constant
All Implemented Interfaces:
Expression
public final class Constant extends Object

  • Field Details

    • TRUE

      public static final Constant TRUE

    • FALSE

      public static final Constant FALSE

  • Constructor Details

    • Constant

      public Constant(Token token)

  • Method Details

    • string

      public static Constant string(String text)

      Handy testing constructor to create a string constant

    • integer

      public static Constant integer(long value)

      Handy testing constructor to create a long "integer" constant

    • floating

      public static Constant floating(double value)

      Handy testing constructor to create a double "floating" constant

    • appendSource

      protected void appendSource(StringBuilder appendTo)

      Implementers extend this to append their source to the given string builder. Done via string builder to encourage a more efficient implementation than is possible with concatenating multiple toString calls that typically contruct a string builder anyway.

    • accept

      public <T, R> R accept(ExpressionVisitor<T,R> visitor, T data)

    • getBoundary

      public Optional<Pair<Token,Token>> getBoundary()
      Returns:
      a pair of tokens that represent the start and end of this expression, to be used when giving users information about where errors have occurred. If the expression has been rebuilt then the boundary may be empty or it may be from the original expression. Intended for use in problems to trace errors back to their source.

    • equals

      public boolean equals(Object o)

    • canEqual

      protected boolean canEqual(Object other)

    • hashCode

      public int hashCode()

    • getToken

      public Token getToken()

    • toString

      public final String toString()
      Overrides:
      toString in class Object
      Returns:
      the source, surrounded by the class name to make it easier to discern from a plane string among other debug output

    • toSource

      public final String toSource()
      Specified by:
      toSource in interface Expression
      Returns:
      a normalized version of the AST that can be parsed to be exactly the same AST as this