How does boost::split work?

Does the boost split function require copying the source string before split?

For example-

const char *c = "S1 S2 S3";
std::vector<std::string> v;
boost:开发者_运维技巧:split(v, c, boost::is_any_of(" "));

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It works exactly like your code. No need to copy.

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You do not have to copy, according to this it will make copies for you (you could also store references). There is no problems with const inputs thus.