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java.lang.Object | +--com.inxar.syntacs.grammar.regular.REOption
Standard Option
implementation.
Constructor Summary | |
REOption(REGrammar grammar,
RegularExpression internal)
Constructs the REOption on the given
REGrammar and input
RegularExpression . |
Method Summary | |
Object |
clone()
See the general explanation of clone() given above. |
void |
follow()
Triggers the process of computing the follow sets. |
IntSet |
getFirstSet()
Returns the IntSet of Intervals which
are visible at the logical beginning of the the expression. |
RegularExpression |
getInternal()
Returns the RegularExpression which this '?'
modifies. |
IntSet |
getLastSet()
Returns the IntSet of Intervals which
are visible at the logical end of the the expression. |
boolean |
isNullable()
Returns true if this
RegularExpression either *is* Epsilon
or derives it. |
String |
toString()
|
Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
public REOption(REGrammar grammar, RegularExpression internal)
REOption
on the given
REGrammar
and input
RegularExpression
.Method Detail |
public String toString()
toString
in class Object
public boolean isNullable()
RegularExpression
true
if this
RegularExpression
either *is* Epsilon
or derives it.isNullable
in interface RegularExpression
public IntSet getFirstSet()
RegularExpression
IntSet
of Intervals
which
are visible at the logical beginning of the the expression.getFirstSet
in interface RegularExpression
public IntSet getLastSet()
RegularExpression
IntSet
of Intervals
which
are visible at the logical end of the the expression.getLastSet
in interface RegularExpression
public void follow()
RegularExpression
follow
in interface RegularExpression
public RegularExpression getInternal()
Option
RegularExpression
which this '?'
modifies.getInternal
in interface Option
public Object clone() throws CloneNotSupportedException
RegularExpression
clone()
given above.clone
in interface RegularExpression
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