Defined in file <include/boost/url/grammar/string_token.hpp> on line 49

This abstract interface provides a means for an algorithm to generically obtain a modifiable, contiguous character buffer of prescribed size. As the author of an algorithm simply declare an rvalue reference as a parameter type. Instances of this type are intended only to be used once and then destroyed.

The declared function accepts any temporary instance of arg to be used for writing:

To implement the interface for your type or use-case, derive from the class and implement the prepare function.