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

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

Type Parameters:

T - type of terminals.

P - type of productions.

V - type of versions.

Direct Known Subclasses:

AcceptAction, BranchAction, EnterAction, ErrorAction, ExitAction, ReduceAction, ShiftAction, VersionedAction

public abstract class Action<T,P,V>
extends Object

Parser actions (shift/reduce/accept/error) super-class.

Author:

Julien Cervelle

See Also:

ShiftAction, ReduceAction, AcceptAction, ErrorAction, EnterAction, ExitAction

Constructor Summary

Action()

Method Summary

abstract <N> ActionReturn	doPerform(Parser<T,N,P,V> parser, T terminal) Performs necessary computations required by the action.
boolean	isError(V version) Indicates if the action is an error.
boolean	isShift(V version) Indicates if the action is a shift.

Methods inherited from class java.lang.Object

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

Constructor Detail

Action

public Action()

Method Detail

doPerform

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

Performs necessary computations required by the action.

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.

isError

public boolean isError(V version)

Indicates if the action is an error.

Parameters:

version - version of the action to consider, see VersionedAction.

Returns:

true if the action is an errror.

isShift

public boolean isShift(V version)

Indicates if the action is a shift.

Parameters:

version - version of the action to consider, see VersionedAction.

Returns:

true if the action is an shift.