/** Returns the concatenation of the two values. */
@Override
public Value concatenate(Value v) {
if (v instanceof StringVal) {
return ValueFactory.create(str + " " + v.toString());
} else if (v instanceof DoubleVal) {
return ValueFactory.create(str + " " + v.toString());
} else if (v instanceof NoneVal) {
return this;
} else {
log.warning("cannot concatenate " + this + " and " + v);
return ValueFactory.noneValue;
}
}
/** Returns a list of words */
@Override
public Collection<Value> getSubValues() {
return Arrays.stream(str.split(" "))
.map(w -> ValueFactory.create(w))
.collect(Collectors.toList());
}