fr.umlv.tatoo.runtime.parser
Class ReduceAction<T,P,V>

java.lang.Object
  fr.umlv.tatoo.runtime.parser.Action<T,P,V>
      fr.umlv.tatoo.runtime.parser.ReduceAction<T,P,V>

Type Parameters:

T - type of terminals.

P - type of productions.

V - type of versions.

public class ReduceAction<T,P,V>
extends Action<T,P,V>

Reduce action class.

Author:

Julien Cervelle

Constructor Summary

ReduceAction(P production, int rightSize, int[] gotos)
Constructs a reduce action.

Method Summary

<N> ActionReturn	doPerform(Parser<T,N,P,V> parser, T terminal) Performs necessary computations required by the action.
P	getProduction() Returns the production on which the reduce is performed.
int	getRightSize() Returns the size of the right hand size of the production associated with this reduce action.
String	toString()

Methods inherited from class fr.umlv.tatoo.runtime.parser.Action

isError, isShift

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ReduceAction

public ReduceAction(P production,
                    int rightSize,
                    int[] gotos)

Constructs a reduce action.

Parameters:

production - production associated with this reduce action.

rightSize - size of the production right hand side.

gotos - goto array used for goto actions after reduction.

Method Detail

getProduction

public P getProduction()

Returns the production on which the reduce is performed.

Returns:

the production.

getRightSize

public int getRightSize()

Returns the size of the right hand size of the production associated with this reduce action.

Returns:

the right hand side size.

doPerform

public <N> ActionReturn doPerform(Parser<T,N,P,V> parser,
                                  T terminal)

Description copied from class: Action

Performs necessary computations required by the action.

Specified by:

doPerform in class Action<T,P,V>

Type Parameters:

N - type of non-terminals.

Parameters:

parser - the parser object.

terminal - terminal on which the shift is performed.

Returns:

NEXT if action consumed terminal, and KEEP else.

toString

public String toString()

Overrides:

toString in class Object