[Issue] Parse a std::string_view without converting to std::stringstream

[mnorfolk03]

It seems that given a string, the only way to parse it is to put it into a std::stringstream.

If I already have a std::string_view containing my CSV data which I wish to parse, then to pass it to the CSVParser, I need to convert it to a std::stringstream, which will create an additional copy.

If it were a std::string I could move it into the stringstream, but it would be nice if there was a way for me externally to manage and own the data which the CSV Parser then reads, without creating unnecessary copies.

Since the parser should only read the data, I think this makes sense to have as an option

[vincentlaucsb]

Valid request. Would require architectural changes to avoid the stringstream copy. Marking as enhancement for future consideration. PRs welcome.