public MathSignQueue subQueue(int start, int end) {
MathSignQueue subQueue = new MathSignQueue();
subQueue.mAngularUnit = mAngularUnit;
while (start < end) {
subQueue.mMathSigns.add(this.mMathSigns.get(start++));
}
return subQueue;
}
// 从文本输入中解析出一个MathSignQueue
public static MathSignQueue parse(String input) throws CalcException {
MathSignQueue queue = new MathSignQueue();
if (input == null || input.length() == 0) {
throw new CalcException("输入为空");
}
queue.mTextInput = input;
while (queue.mParseIndex < input.length()) {
if (!queue.parseOneSign()) {
throw new CalcException("不能解析的部分", queue.mParseIndex, queue.mTextInput.length());
}
}
return queue;
}
public MathSignQueue append(MathSignQueue tail) {
for (int i = 0; i < tail.size(); i++) {
this.mMathSigns.add(tail.mMathSigns.get(i));
}
return this;
}