danbikel.parser
Class SymbolPair

java.lang.Object
  danbikel.util.Pair
      danbikel.parser.SymbolPair

All Implemented Interfaces:

Serializable

public class SymbolPair
extends Pair

A simple class for holding a pair of Symbol objects.

See Also:

Serialized Form

Field Summary

Fields inherited from class danbikel.util.Pair

first, second

Constructor Summary

SymbolPair()
Constructs an empty pair of symbols (both objects are null).

SymbolPair(Sexp sexp)
Constructs a SymbolPair from the first two symbols in the specified list.

SymbolPair(Symbol first, Symbol second)
Constructs a new symbol pair from the specified symbols.

Method Summary

Symbol	first() Returns the first symbol in this pair.
Symbol	second() Returns the second symbol in this pair.
String	toString() Returns an S-expression list string representation of this symbol pair.

Methods inherited from class danbikel.util.Pair

equals, hashCode

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

SymbolPair

public SymbolPair()

Constructs an empty pair of symbols (both objects are null).

SymbolPair

public SymbolPair(Sexp sexp)

Constructs a SymbolPair from the first two symbols in the specified list. If the specified S-expression is not of type SexpList, or if the specified list does not have Symbol objects as its first two elements, this method will throw an ClassCastException.

Parameters:

sexp - the list whose first two symbol elements will be made into the two elements of this symbol pair

SymbolPair

public SymbolPair(Symbol first,
                  Symbol second)

Constructs a new symbol pair from the specified symbols.

Parameters:

first - the first symbol

second - the second symbol

Method Detail

first

public final Symbol first()

Returns the first symbol in this pair.

second

public final Symbol second()

Returns the second symbol in this pair.

toString

public String toString()

Returns an S-expression list string representation of this symbol pair.

Overrides:

toString in class Pair

Returns:

an S-expression list string representation of this symbol pair.