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Fixes #1703 properly this time. addendum to #1718

This commit is contained in:
parrt 2017-03-02 14:13:27 -08:00
parent 8dee8c774b
commit 6572b08095
2 changed files with 6 additions and 30 deletions
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10
runtime/Java/src/org/antlr/v4/runtime/misc/IntSet.java
View File

@ -128,16 +128,6 @@ public interface IntSet {
@Override
boolean equals(Object obj);
/**
* Returns the single value contained in the set, if {@link #size} is 1;
* otherwise, result is undefined. Check {@link #isNil()} before using
* this function.
*
* @return the single value contained in the set, if {@link #size} is 1;
* otherwise, result is undefined.
*/
int getSingleElement();
/**
* Returns {@code true} if the set contains the specified element.
*

26
runtime/Java/src/org/antlr/v4/runtime/misc/IntervalSet.java
View File

@ -416,28 +416,15 @@ public class IntervalSet implements IntSet {
return intervals==null || intervals.isEmpty();
}
/** {@inheritDoc} */
@Override
public int getSingleElement() {
if ( intervals!=null && intervals.size()==1 ) {
Interval I = intervals.get(0);
if ( I.a == I.b ) {
return I.a;
}
}
return Token.INVALID_TYPE;
}
/**
* Returns the maximum value contained in the set if not isNil().
* Otherwise, result is undefined.
*
* @return the maximum value contained in the set. If the set is empty,
* result is undefined.
* @return the maximum value contained in the set.
* @throws RuntimeException if set is empty
*/
public int getMaxElement() {
if ( isNil() ) {
return Token.INVALID_TYPE;
throw new RuntimeException("set is empty");
}
Interval last = intervals.get(intervals.size()-1);
return last.b;
@ -445,14 +432,13 @@ public class IntervalSet implements IntSet {
/**
* Returns the minimum value contained in the set if not isNil().
* Otherwise, result is undefined.
*
* @return the minimum value contained in the set. If the set is empty,
* result is undefined.
* @return the minimum value contained in the set.
* @throws RuntimeException if set is empty
*/
public int getMinElement() {
if ( isNil() ) {
return Token.INVALID_TYPE;
throw new RuntimeException("set is empty");
}
return intervals.get(0).a;