To expand the type space, Emacs uses a C pattern sometimes called "Poor Man's Inheritance" or struct embedding. By placing a common header as the very first field of a struct, a pointer can be cast to the header type, checked for its sub-type, and then cast to the specific object type.
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Раскрыты подробности о фестивале ГАРАЖ ФЕСТ в Ленинградской области23:00
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Now, OsmAnd performs another Dijkstra search, but this time on the much smaller "base graph." This graph consists only of the border points and the pre-calculated shortcut values between them.