/**
* Returns the amount of space required to flatten the given sub-array of symbols.
*
* @param symbols The array of input symbols.
* @param start The index where the subarray starts.
* @return The number of symbols that will be produced if one expands the given input.
*/
protected static int flattenedSize(Symbol[] symbols, int start) {
int result = 0;
for (int i = start; i < symbols.length; i++) {
if (symbols[i] instanceof Sequence) {
Sequence s = (Sequence) symbols[i];
result += s.flattenedSize();
} else {
result += 1;
}
}
return result;
}
