string_to_scheme

Return the known scheme for a non-normalized string, if known.

Defined in header <boost/url/scheme.hpp>

scheme
string_to_scheme(
    string_view s);

If the string does not identify a known scheme, the value scheme::unknown is returned.

scheme      = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )

The known scheme

Name	Description
`s`	The string holding the scheme

Convenience header <boost/url.hpp>