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Merge pull request #586 from sharwell/getalts 

Add utility method ATNConfigSet.getAlts
This commit is contained in:
Terence Parr 2014-05-31 16:48:29 -07:00
parent 43b04f02f6 27ce016d3d
commit 63fb71cc9f
1 changed files with 15 additions and 0 deletions
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15
runtime/Java/src/org/antlr/v4/runtime/atn/ATNConfigSet.java
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@ -194,6 +194,21 @@ public class ATNConfigSet implements Set<ATNConfig> {
return states; return states;
} }
/**
* Gets the complete set of represented alternatives for the configuration
* set.
*
* @return the set of represented alternatives in this configuration set
*/
@NotNull
public BitSet getAlts() {
BitSet alts = new BitSet();
for (ATNConfig config : configs) {
alts.set(config.alt);
}
return alts;
}
public List<SemanticContext> getPredicates() { public List<SemanticContext> getPredicates() {
List<SemanticContext> preds = new ArrayList<SemanticContext>(); List<SemanticContext> preds = new ArrayList<SemanticContext>();
for (ATNConfig c : configs) { for (ATNConfig c : configs) {