The Future of C++ Interoperability: Insights from Porting a Game to Swift

Transcript

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2. 4JNVUSBOT 2
3. 3 Segmentation fault
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5. 5 // Updates the way speed limit of the tile of the given position void update_speed_limit(coord3d pos, uint16_t speed) { tile_t* tile = world()->get_tile(pos); way_t* way = tile->get_way(); way->set_speed_limit(speed); }
6. 6 // Updates the way speed limit of the tile of the given position void update_speed_limit(coord3d pos, uint16_t speed) { tile_t* tile = world()->get_tile(pos); way_t* way = tile->get_way(); way->set_speed_limit(speed); }
7. 7 // Updates the way speed limit of the tile of the given position void update_speed_limit(coord3d pos, uint16_t speed) { tile_t* tile = world()->get_tile(pos); way_t* way = tile->get_way(); way->set_speed_limit(speed); }
8. 8 // Updates the way speed limit of the tile of the given position void update_speed_limit(coord3d pos, uint16_t speed) { tile_t* tile = world()->get_tile(pos); way_t* way = tile->get_way(); way->set_speed_limit(speed); } /VMM
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9. 9 // Updates the way speed limit of the tile of the given position void update_speed_limit(coord3d pos, uint16_t speed) { tile_t* tile = world()->get_tile(pos); if(tile==NULL) { return; } way_t* way = tile->get_way(); if(way==NULL) { return; } way->set_speed_limit(speed); }
10. 10 // Updates the way speed limit of the tile of the given position void update_speed_limit(coord3d pos, uint16_t speed) { tile_t* tile = world()->get_tile(pos); if(tile==NULL) { return; } way_t* way = tile->get_way(); if(way==NULL) { return; } way->set_speed_limit(speed); }
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13. 13 // Updates the way speed limit of the tile of the given position func updateSpeedLimit(pos: Coord, speed: UInt) { let tile = world().getTile(pos) let way = tile?.way way?.setSpeedLimit(speed) } 4XJGU
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    4XJGU 16 class CppType { public: int32_t myFunc() const { return 42; } }; let cppObj = CppType() let value = cppObj.myFunc()
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    4JNVUSBOT 29 rail_vehicle_t road_vehicle_t air_vehicle_t vehicle_t
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    4JNVUSBOT 30 rail_vehicle_t road_vehicle_t air_vehicle_t vehicle_t
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    UZQFT class rail_vehicle_t: public Vehicle { -JNJUBUJPOT 31 class RailVehicle: vehicle_t {
32. 32 C rail_vehicle_t func move() C vehicle_t virtual func move() *OIFSJUT
33. 33 S RailVehicle mutating func move() var super: vehicle_t C vehicle_t virtual func move()
34. 34 S RailVehicle mutating func move() var super: vehicle_t C vehicle_t virtual func move()
35. 35 C vehicle_t virtual func move() C abstract_vehicle_t virtual func move() = 0; S RailVehicle mutating func move() var super: vehicle_t
36. 36 C vehicle_t virtual func move() C abstract_vehicle_t virtual func move() = 0; S RailVehicle mutating func move() var super: vehicle_t C wrapped_rail_vehicle_t func move() { innerObject.move(); } RailVehicle innerObject;
37. 37 C vehicle_t virtual func move() C abstract_vehicle_t virtual func move() = 0; S RailVehicle mutating func move() var super: vehicle_t C wrapped_rail_vehicle_t func move() { innerObject.move(); } RailVehicle innerObject;
38. 38 C vehicle_t virtual func move() S RailVehicle mutating func move() var super: vehicle_t C road_vehicle_t func move()
39. 39 C vehicle_t virtual func move() S RailVehicle mutating func move() var super: vehicle_t C road_vehicle_t func move() P Vehicle mutating func move() *OIFSJUT $POGPSNT $POGPSNT
40. 40 C vehicle_t virtual func move() S RailVehicle mutating func move() var super: vehicle_t C road_vehicle_t func move() P Vehicle mutating func move() *OIFSJUT $POGPSNT $POGPSNT
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