- the implicit casts from std::string/char* is part of the design for
the view class so we do not want to disable those.
- intializer list constructors should be implicitly called
By representing string_view as char* instead of
std::string::const_iterator the string_view class bring possibly
slightly lower overhead, but mostly enables some optimisations.
A simple non-mutating view into a string. Implements a shallow reference
to a std::string, replicating its operations to be drop-in replaceable.
Primarily designed for inner loop use, where expensive string
allocations become a performance killer.
