java_cup

Class lalr_transition

java.lang.Object

java_cup.lalr_transition

public class lalr_transition
extends Object

This class represents a transition in an LALR viable prefix recognition machine. Transitions can be under terminals for non-terminals. They are internally linked together into singly linked lists containing all the transitions out of a single state via the _next field.

Version:

last updated: 11/25/95

Author:

Scott Hudson

See Also:

lalr_state

Field Summary

Fields

Modifier and Type	Field and Description
protected lalr_transition	_next Next transition in linked list of transitions out of a state
protected symbol	_on_symbol The symbol we make the transition on.
protected lalr_state	_to_state The state we transition to.

Constructor Summary

Constructors

Constructor and Description
lalr_transition(symbol on_sym, lalr_state to_st) Constructor with null next.
lalr_transition(symbol on_sym, lalr_state to_st, lalr_transition nxt) Full constructor.

Method Summary

Methods

Modifier and Type	Method and Description
lalr_transition	next() Next transition in linked list of transitions out of a state
symbol	on_symbol() The symbol we make the transition on.
lalr_state	to_state() The state we transition to.
String	toString() Convert to a string.

Methods inherited from class java.lang.Object

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

Field Detail

_on_symbol

protected symbol _on_symbol

The symbol we make the transition on.

_to_state

protected lalr_state _to_state

The state we transition to.

_next

protected lalr_transition _next

Next transition in linked list of transitions out of a state

Constructor Detail

lalr_transition

public lalr_transition(symbol on_sym,
               lalr_state to_st,
               lalr_transition nxt)
                throws internal_error

Full constructor.

Parameters:

on_sym - symbol we are transitioning on.

to_st - state we transition to.

nxt - next transition in linked list.

Throws:

internal_error

lalr_transition

public lalr_transition(symbol on_sym,
               lalr_state to_st)
                throws internal_error

Constructor with null next.

Parameters:

on_sym - symbol we are transitioning on.

to_st - state we transition to.

Throws:

internal_error

Method Detail

on_symbol

public symbol on_symbol()

The symbol we make the transition on.

to_state

public lalr_state to_state()

The state we transition to.

next

public lalr_transition next()

Next transition in linked list of transitions out of a state

toString

public String toString()

Convert to a string.

Overrides:

toString in class Object