On 10/18/21 4:26 AM, Peter Dimov via Boost wrote:
Andrey Semashev wrote:
How would that work, exactly? Take the example function signature and show us how it's done.
boost::string_view get_string();
template< typename String > String get_string() { boost::string_view res = get_string(); return String(res.data(), res.size()); }
The function is
boost::string_view api_function( boost::string_view str );
The code I posted was an illustration of the case when you don't accept a string in the function.
If we apply the technique above,
api_function( "something" );
will return boost::string_view, and C++17 users will have the option of using
auto r = api_functionstd::string_view( "something" );
Again, this works, but isn't exactly optimal. C++17 users are penalized for no good reason.
If you want to make std::string_view the default, you can do exactly that using the same approach. Automatically or by user defining a macro.