C++ 清空字符串流的最佳方法？
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Best way to empty stringstream?
提问by Brian R. Bondy
One of the possibilities is:
一种可能性是：
somestringstream.str("");
But is it most optimal? Is there any way to preserve stringstream internal buffer, so that following operator<<() calls would not require to reserve memory again?
但它是最优化的吗？有什么方法可以保留 stringstream 内部缓冲区，以便后面的 operator<<() 调用不需要再次保留内存？
回答by Brian R. Bondy
I've always done:
我一直这样做：
s.clear();//clear any bits set
s.str(std::string());
@litb gets into more detailabout how to seekp to the start of the stream combined with std::ends you can keep your allocated size.
@litb更详细地了解如何结合 std::ends 查找流的开头，您可以保持分配的大小。
