private boolean checkIndent(ISet o) {
if (indent && o.size() > 1) {
for (IValue x : o) {
Type type = x.getType();
return indented(type);
}
}
return false;
}
public ITree filterAmbiguity(ITree ambCluster, Object environment) {
ISet alts = (ISet) ambCluster.get("alternatives");
if (alts.size() == 0) {
return null;
}
Environment env = (Environment) environment;
Result<IValue> var = env.getFrameVariable("amb");
if (var != null && var instanceof ICallableValue) {
Type type = RascalTypeFactory.getInstance().nonTerminalType(ambCluster);
ICallableValue func = (ICallableValue) var;
try {
Result<IValue> result = func.call(new Type[] {TF.setType(type)}, new IValue[] {alts}, null);
if (result.getType().isBottom()) {
return ambCluster;
}
ITree r = (ITree) result.getValue();
if (TreeAdapter.isAmb(r)) {
ISet returnedAlts = TreeAdapter.getAlternatives(r);
if (returnedAlts.size() == 1) {
return (ITree) returnedAlts.iterator().next();
} else if (returnedAlts.size() == 0) {
return null;
} else {
return r;
}
}
return (ITree) result.getValue();
} catch (ArgumentMismatch e) {
return ambCluster;
}
}
return ambCluster;
}