fr.umlv.tatoo.runtime.tools
Class LookaheadMapFactory

java.lang.Object
  fr.umlv.tatoo.runtime.tools.LookaheadMapFactory

public class LookaheadMapFactory
extends Object

Helper methods to create a LookaheadMap. This class provide two implementations :

1. a generic one hashLookaheadMap(ParserTable) that use a classical hash table.
2. a enum specific one enumLookaheadMap(ParserTable) that only works if terminals are specified using an enum. By default, the Tatoo java backend generates terminals as an enum.

Author:

Remi Forax

Constructor Summary

LookaheadMapFactory()

Method Summary

static <V extends Enum<V>,T extends Enum<T>> LookaheadMap<T,V>	enumLookaheadMap(ParserTable<T,?,?,V> table) Returns a map that contains, for a specific version, the mapping between a terminal and its lookahead set.
static <V,T> LookaheadMap<T,V>	hashLookaheadMap(ParserTable<T,?,?,V> table) Returns a map that contains, for a specific version, the mapping between a terminal and its lookahead set.

Methods inherited from class java.lang.Object

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

Constructor Detail

LookaheadMapFactory

public LookaheadMapFactory()

Method Detail

enumLookaheadMap

public static <V extends Enum<V>,T extends Enum<T>> LookaheadMap<T,V> enumLookaheadMap(ParserTable<T,?,?,V> table)

Returns a map that contains, for a specific version, the mapping between a terminal and its lookahead set. The terminal must be represented by an enum values.

Type Parameters:

T - type of terminal enumeration.

V - type of version.

Parameters:

table - the table produced by Tatoo.

Returns:

a lookahead map

See Also:

hashLookaheadMap(ParserTable)

hashLookaheadMap

public static <V,T> LookaheadMap<T,V> hashLookaheadMap(ParserTable<T,?,?,V> table)

Returns a map that contains, for a specific version, the mapping between a terminal and its lookahead set.

Type Parameters:

T - type of terminal enumeration.

V - type of version.

Parameters:

table - the table produced by Tatoo. .

Returns:

a lookahead map