| | range-for support shared by every dxd type whose elements aren't already kept in an STL container of their own (dx::key_value_tree, cf::data, cf::dictionary, cf::array): a derived_t populates container_t however it needs to - a single existing conversion, or an explicit per-element loop - in its own constructor, then calls seed() once population is complete; operator++()/operator!=() forward to container_t's own iterator from then on. operator*() stays derived_t's own: what it should return (a plain element, const or not) differs per user, from cf::data's read-only bytes to dx::key_value_tree's mutable, further-navigable child node. More...
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