"stringstream" 是否复制构造它的字符串？
Does "stringstream" copy the string on which it is constructed?
像这样的一段代码
std::string s("random;string;");
std::stringstream s_stream(s);
s_stream 复制了 s 吗？
我的意思是，如果在创建 s_stream 之后修改 s 会发生什么？
是的。来自 http://en.cppreference.com/w/cpp/io/basic_stringstream/basic_stringstream
2) Uses a copy of str as initial contents of the underlying string device. The underlying basic_stringbuf object is constructed as basic_stringbuf<Char,Traits,Allocator>(str, mode).
像这样的一段代码
std::string s("random;string;");
std::stringstream s_stream(s);
s_stream 复制了 s 吗？
我的意思是，如果在创建 s_stream 之后修改 s 会发生什么？
是的。来自 http://en.cppreference.com/w/cpp/io/basic_stringstream/basic_stringstream
2) Uses a copy of
stras initial contents of the underlying string device. The underlyingbasic_stringbufobject is constructed asbasic_stringbuf<Char,Traits,Allocator>(str, mode).