...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
(Inherited from grammar::string_view_base
)
Return the position of the first non-match.
constexpr size_type find_first_not_of( string_view str, size_type pos = 0) const;
See string_view::find_first_not_of