Apply IWYU changes

These are the changes made by running IWYU as described in
DEVELOPER_TOOLING.md.

src/action.cpp

@@ -1,8 +1,11 @@
 #include "action.h"
 
+#include <limits.h>
 #include <algorithm>
 #include <istream>
 #include <iterator>
+#include <memory>
+#include <utility>
 
 #include "cata_utility.h"
 #include "debug.h"
@@ -22,6 +25,12 @@
 #include "ui.h"
 #include "vehicle.h"
 #include "vpart_position.h"
+#include "cursesdef.h"
+#include "enums.h"
+#include "item.h"
+#include "ret_val.h"
+
+class inventory;
 
 void parse_keymap( std::istream &keymap_txt, std::map<char, action_id> &kmap,
                    std::set<action_id> &unbound_keymap );

src/active_item_cache.cpp

@@ -1,6 +1,7 @@
 #include "active_item_cache.h"
 
 #include <algorithm>
+#include <utility>
 
 #include "debug.h"
 #include "item.h"

src/active_item_cache.h

@@ -6,8 +6,7 @@
 #include <unordered_map>
 
 #include "enums.h"
-
-class item;
+#include "item.h"
 
 // A struct used to uniquely identify an item within a submap or vehicle.
 struct item_reference {

src/activity_handlers.cpp

@@ -1,7 +1,16 @@
 #include "activity_handlers.h"
 
+#include <limits.h>
+#include <stddef.h>
 #include <algorithm>
 #include <cmath>
+#include <iterator>
+#include <memory>
+#include <ostream>
+#include <set>
+#include <stdexcept>
+#include <string>
+#include <utility>
 
 #include "action.h"
 #include "advanced_inv.h"
@@ -39,6 +48,28 @@
 #include "vehicle.h"
 #include "vpart_position.h"
 #include "map_selector.h"
+#include "bodypart.h"
+#include "calendar.h"
+#include "cata_utility.h"
+#include "character.h"
+#include "creature.h"
+#include "damage.h"
+#include "enums.h"
+#include "int_id.h"
+#include "item.h"
+#include "item_location.h"
+#include "item_stack.h"
+#include "iuse.h"
+#include "line.h"
+#include "monster.h"
+#include "optional.h"
+#include "pimpl.h"
+#include "pldata.h"
+#include "ret_val.h"
+#include "string_id.h"
+#include "units.h"
+
+class recipe;
 
 #define dbg(x) DebugLog((DebugLevel)(x),D_GAME) << __FILE__ << ":" << __LINE__ << ": "
 

src/activity_handlers.h

@@ -6,10 +6,14 @@
 #include <map>
 #include <unordered_set>
 #include <vector>
+#include <list>
 
 #include "player_activity.h"
 
 class player;
+class Character;
+class item;
+struct tripoint;
 
 std::vector<tripoint> get_sorted_tiles_by_distance( const tripoint &abspos,
         const std::unordered_set<tripoint> &tiles );

src/activity_item_handling.cpp

@@ -1,11 +1,17 @@
 #include "activity_handlers.h" // IWYU pragma: associated
 
+#include <limits.h>
+#include <stddef.h>
 #include <algorithm>
 #include <cassert>
 #include <list>
 #include <vector>
+#include <iterator>
+#include <memory>
+#include <set>
+#include <string>
+#include <utility>
 
-#include "action.h"
 #include "clzones.h"
 #include "creature.h"
 #include "debug.h"
@@ -33,6 +39,13 @@
 #include "vehicle.h"
 #include "vpart_position.h"
 #include "vpart_reference.h"
+#include "calendar.h"
+#include "character.h"
+#include "game_constants.h"
+#include "inventory.h"
+#include "item_stack.h"
+#include "line.h"
+#include "units.h"
 
 void cancel_aim_processing();
 

src/activity_type.cpp

@@ -2,6 +2,8 @@
 
 #include <map>
 #include <unordered_map>
+#include <functional>
+#include <utility>
 
 #include "activity_handlers.h"
 #include "assign.h"
@@ -10,6 +12,7 @@
 #include "json.h"
 #include "player.h"
 #include "translations.h"
+#include "player_activity.h"
 
 // activity_type functions
 static std::map< activity_id, activity_type > activity_type_all;

src/activity_type.h

@@ -2,6 +2,8 @@
 #ifndef ACTIVITY_TYPE_H
 #define ACTIVITY_TYPE_H
 
+#include <string>
+
 #include "string_id.h"
 
 class activity_type;

src/addiction.cpp

@@ -1,11 +1,17 @@
 #include "addiction.h"
 
+#include <algorithm>
+#include <map>
+#include <utility>
+
 #include "morale_types.h"
 #include "output.h"
 #include "player.h"
 #include "pldata.h"
 #include "rng.h"
 #include "translations.h"
+#include "calendar.h"
+#include "creature.h"
 
 const efftype_id effect_hallu( "hallu" );
 const efftype_id effect_shakes( "shakes" );

src/addiction.h

@@ -2,12 +2,16 @@
 #ifndef ADDICTION_H
 #define ADDICTION_H
 
+#include <string>
+
 #include "string_id.h"
 
 class addiction;
 class player;
+
 enum add_type : int;
 class morale_type_data;
+
 using morale_type = string_id<morale_type_data>;
 
 constexpr int MIN_ADDICTION_LEVEL = 3; // Minimum intensity before effects are seen

src/advanced_inv.cpp

@@ -26,6 +26,16 @@
 #include "vehicle.h"
 #include "vpart_position.h"
 #include "vpart_reference.h"
+#include "calendar.h"
+#include "color.h"
+#include "game_constants.h"
+#include "int_id.h"
+#include "inventory.h"
+#include "item.h"
+#include "line.h"
+#include "optional.h"
+#include "pldata.h"
+#include "string_id.h"
 
 #ifdef __ANDROID__
 #include <SDL_keyboard.h>
@@ -36,9 +46,13 @@
 #include <cstring>
 #include <map>
 #include <set>
-#include <sstream>
 #include <string>
 #include <vector>
+#include <initializer_list>
+#include <iterator>
+#include <memory>
+#include <unordered_map>
+#include <utility>
 
 enum aim_exit {
     exit_none = 0,

src/advanced_inv.h

@@ -2,6 +2,8 @@
 #ifndef ADVANCED_INV_H
 #define ADVANCED_INV_H
 
+#include <ctype.h>
+#include <stddef.h>
 #include <array>
 #include <functional>
 #include <list>

src/ammo.cpp

@@ -6,6 +6,7 @@
 #include "item.h"
 #include "json.h"
 #include "translations.h"
+#include "string_id.h"
 
 namespace
 {

src/ammo.h

@@ -3,6 +3,7 @@
 #define AMMO_H
 
 #include <string>
+#include <utility>
 
 class JsonObject;
 

src/anatomy.cpp

@@ -1,15 +1,20 @@
 #include "anatomy.h"
 
+#include <stddef.h>
 #include <array>
 #include <cmath>
 #include <numeric>
+#include <set>
 
 #include "cata_utility.h"
 #include "generic_factory.h"
 #include "messages.h"
 #include "output.h"
 #include "rng.h"
 #include "weighted_list.h"
+#include "debug.h"
+#include "int_id.h"
+#include "json.h"
 
 anatomy_id human_anatomy( "human_anatomy" );
 

src/anatomy.h

@@ -3,11 +3,14 @@
 #define ANATOMY_H
 
 #include <vector>
+#include <string>
 
 #include "bodypart.h"
 #include "string_id.h"
 
 class anatomy;
+class JsonObject;
+
 using anatomy_id = string_id<anatomy>;
 
 /**

src/animation.cpp

@@ -9,6 +9,12 @@
 #include "player.h"
 #include "popup.h"
 #include "weather.h"
+#include "creature.h"
+#include "cursesdef.h"
+#include "enums.h"
+#include "game_constants.h"
+#include "posix_time.h"
+#include "translations.h"
 
 #ifdef TILES
 #include <memory>
@@ -19,6 +25,11 @@ extern std::unique_ptr<cata_tiles> tilecontext; // obtained from sdltiles.cpp
 #endif
 
 #include <algorithm>
+#include <list>
+#include <map>
+#include <string>
+#include <utility>
+#include <vector>
 
 bool is_valid_in_w_terrain( int x, int y ); // see game.cpp
 

src/armor_layers.cpp

@@ -3,6 +3,7 @@
 #include <algorithm>
 #include <string>
 #include <vector>
+#include <iterator>
 
 #include "cata_utility.h"
 #include "catacharset.h" // used for utf8_width()
@@ -14,6 +15,7 @@
 #include "output.h"
 #include "string_formatter.h"
 #include "translations.h"
+#include "debug.h"
 
 namespace
 {

src/artifact.cpp

@@ -1,15 +1,27 @@
 #include "artifact.h"
 
+#include <stdlib.h>
 #include <array>
-#include <cmath>
 #include <sstream>
+#include <algorithm>
+#include <map>
+#include <memory>
+#include <set>
+#include <unordered_map>
+#include <vector>
 
 #include "cata_utility.h"
 #include "item_factory.h"
 #include "json.h"
 #include "rng.h"
 #include "string_formatter.h"
 #include "translations.h"
+#include "bodypart.h"
+#include "color.h"
+#include "damage.h"
+#include "iuse.h"
+#include "optional.h"
+#include "units.h"
 
 template<typename V, typename B>
 inline units::quantity<V, B> rng( const units::quantity<V, B> &min,

src/artifact.h

@@ -9,6 +9,7 @@
 
 class JsonObject;
 class JsonOut;
+class item;
 
 enum art_effect_active : int {
     AEA_NULL = 0,

src/auto_pickup.cpp

@@ -1,7 +1,12 @@
 #include "auto_pickup.h"
 
+#include <stddef.h>
 #include <algorithm>
 #include <sstream>
+#include <functional>
+#include <map>
+#include <memory>
+#include <utility>
 
 #include "cata_utility.h"
 #include "debug.h"
@@ -17,9 +22,11 @@
 #include "path_info.h"
 #include "player.h"
 #include "string_formatter.h"
-#include "string_id.h"
 #include "string_input_popup.h"
 #include "translations.h"
+#include "color.h"
+#include "cursesdef.h"
+#include "item.h"
 
 auto_pickup &get_auto_pickup()
 {