std::string_view

std::string_view is a read-only reference to a sequence of char. It provides a way of passing strings without the overhead of copying std::string.

On input, Rice treats std::string_view as a Builtin type which means it copies the portion of the char sequence that a std::string_view references in C++ to Ruby. Please refer to the std::string documentation to learn about how Rice handles encodings.

On output, Rice creates a std::string_view that references a Ruby string’s underlying char buffer. Note this is DANGEROUS. Sooner or later the Ruby string will be garbage collected or moved as part of compaction, thus invalidating the char buffer. So use this with caution.