Lazily applies an unary function to each element in the source range that returns another range (possibly empty), flattening the result.
Public Member Functions | |
template<typename Rng , typename Fun > | |
requires viewable_range< Rng > &&transformable_range< Rng, Fun > &&constexpr joinable_range< transform_view< all_t< Rng >, Fun > > auto | operator() (Rng &&rng, Fun fun) const |