unit_map Class Reference

Container associating units to locations. More...

#include <map.hpp>

Classes
struct	const_iter_types
struct	iterator_base
struct	standard_iter_types
struct	unit_pod
	The pointer to the unit and a reference counter to record the number of extant iteratorspointing to this unit. More...

Public Types
typedef iterator_base< standard_iter_types >	unit_iterator
typedef iterator_base< const_iter_types >	const_unit_iterator
typedef unit_iterator	iterator
typedef const_unit_iterator	const_iterator
using	umap_retval_pair_t = std::pair< unit_iterator, bool >

Public Member Functions
	unit_map ()
	unit_map (const unit_map &that)
unit_map &	operator= (const unit_map &that)
	~unit_map ()
void	swap (unit_map &o)
unit_iterator	find (std::size_t id)
unit_iterator	find (const map_location &loc)
const_unit_iterator	find (const map_location &loc) const
const_unit_iterator	find (std::size_t id) const
template<typename T >
unit_ptr	find_unit_ptr (const T &val)
template<typename T >
unit_const_ptr	find_unit_ptr (const T &val) const
unit_iterator	find_leader (int side)
const_unit_iterator	find_leader (int side) const
unit_iterator	find_first_leader (int side)
std::vector< unit_iterator >	find_leaders (int side)
std::vector< const_unit_iterator >	find_leaders (int side) const
std::size_t	count (const map_location &loc) const
unit_iterator	begin ()
const_unit_iterator	begin () const
unit_iterator	end ()
const_unit_iterator	end () const
std::size_t	size () const
std::size_t	num_iters () const
bool	empty () const
void	clear (bool force=false)
umap_retval_pair_t	add (const map_location &l, const unit &u)
	Adds a copy of unit u at location l of the map. More...
umap_retval_pair_t	insert (unit_ptr p)
	Inserts the unit pointed to by p into the map. More...
umap_retval_pair_t	move (const map_location &src, const map_location &dst)
	Moves a unit from location src to location dst. More...
umap_retval_pair_t	replace (const map_location &l, unit_ptr p)
	Works like unit_map::add; but l is emptied first, if needed. More...
std::size_t	erase (const map_location &l)
	Erases the unit at location l, if any. More...
template<typename T >
std::size_t	erase (const T &iter)
	Erases a unit given by a pointer or an iterator. More...
unit_ptr	extract (const map_location &loc)
	Extracts a unit from the map. More...
bool	self_check () const
	Checks invariants. More...
bool	has_unit (const unit *const u) const
	Is the unit in the map? More...
bool	has_unit_at (const map_location &loc) const
	Tests whether a unit exists at the given location. More...

Private Types
typedef std::map< std::size_t, unit_pod >	umap
typedef std::unordered_map< map_location, umap::iterator >	lmap
	Map of location to umap iterator. More...

Private Member Functions
umap::iterator	begin_core () const
bool	is_valid (const umap::const_iterator &i) const
bool	is_valid (const lmap::const_iterator &i) const
bool	is_found (const umap::const_iterator &i) const
bool	is_found (const lmap::const_iterator &i) const
template<typename X >
unit_map::unit_iterator	make_unit_iterator (const X &i)
template<typename X >
unit_map::const_unit_iterator	make_const_unit_iterator (const X &i) const

Private Attributes
umap	umap_
	underlying_id -> unit_pod. More...
lmap	lmap_
	location -> umap::iterator. More...

Detailed Description

Container associating units to locations.

The indirection location -> underlying_id -> unit ensures that iterators stay valid even if WML modifies or moves units on the fly. They even stay valid if a unit is erased from the map and another unit with the same underlying id is inserted in the map. In other words, it is a doubly indexed ordered map with persistent iterators (that never invalidate).

Note

The unit_map is implemented as 2 maps: an unordered map that stores iterators from the ordered map of reference-counted pointers to units.

The unordered map provides O(1) find times. The ordered map ensures ordering of units by underlying_id. The reference counting is what guarantees the persistent iterators. Storing an iterator only prevents that dead unit's id-map entry from being recovered.

Note

Preferred usages for tight loops follows:

Use the std::pair<iterator, bool> format which checks the preconditions and returns false (second) to indicate failure and no change to the unit_map. True indicates success along with the new iterator (first).

Storing the result iterator prevents the old iterator from entering the fallback recovery code. This is faster than the old methodology of find to check if empty, insert, and then find to check for success. It is the same method as std::map uses, the C++ way.

---

unit_iterator i; //results are stored here

ADD: std::pair<unit_iterator, bool> try_add(units->add(loc, unit)); if(try_add.second) { i = try_add.first; }

MOVE: std::pair<unit_iterator, bool> try_add(units->move(src, dst)); if(try_add.second) { i = try_add.first; }

INSERT: std::pair<unit_iterator, bool> try_add(units->insert(unitp)); if(try_add.second) { i = try_add.first; }

REPLACE (preferred over erase and then add) std::pair<unit_iterator, bool> try_add(units->move(loc, unit)); if(try_add.second){ i = try_add.first; }

---

Note

The previous implementation was 2 binary tree based maps: a location map pointing to another. Lookups were O(2*log(N)) and O(log(N)). Order was implicit in the id map chosen as the base. Persistence was provided by reference counting all iterators collectively and only recovering space when there were no iterators outstanding. Even 1 iterator being stored caused a leak, because all space for dead units was not recovered.

Units are owned by the container.

The indirection does not involve map lookups whenever an iterator is dereferenced, it just causes a pointer indirection. The downside is that incrementing iterators is not O(1).

The code does not involve any magic, so units moved while being iterated upon may be skipped or visited twice.

Iterators prevent ghost units from being collected, so they should never be stored in data structures, as it will cause slowdowns!

By popular demand iterators are effectively permanent. They are handles and not iterators. Any access might cause a full lookup. Keeping iterators around holds onto memory.

Definition at line 97 of file map.hpp.

Member Typedef Documentation

const_iterator

typedef const_unit_iterator unit_map::const_iterator

Definition at line 371 of file map.hpp.

const_unit_iterator

typedef iterator_base<const_iter_types> unit_map::const_unit_iterator

Definition at line 367 of file map.hpp.

iterator

typedef unit_iterator unit_map::iterator

Definition at line 370 of file map.hpp.

lmap

typedef std::unordered_map<map_location, umap::iterator> unit_map::lmap

private

Map of location to umap iterator.

Definition at line 120 of file map.hpp.

umap

typedef std::map<std::size_t, unit_pod> unit_map::umap

private

Definition at line 117 of file map.hpp.

umap_retval_pair_t

using unit_map::umap_retval_pair_t = std::pair<unit_iterator, bool>

Definition at line 452 of file map.hpp.

unit_iterator

typedef iterator_base<standard_iter_types> unit_map::unit_iterator

Definition at line 366 of file map.hpp.

Constructor & Destructor Documentation

unit_map() [1/2]

unit_map::unit_map

(

)

Definition at line 29 of file map.cpp.

unit_map() [2/2]

unit_map::unit_map

(

const unit_map &

that

)

Definition at line 35 of file map.cpp.

References add().

~unit_map()

unit_map::~unit_map

(

)

Definition at line 59 of file map.cpp.

References clear().

Member Function Documentation

add()

unit_map::umap_retval_pair_t unit_map::add	(	const map_location &	l,
		const unit &	u
	)

Adds a copy of unit u at location l of the map.

Returns

A pair consisting of an iterator pointing to the new unit (or the unit already occupying that location) and a bool indicating success.

Note

It is 3 times as fast to attempt to insert a unit at l and check for success than it is to verify that the location is empty, insert the unit, and then check the location for the unit.

Definition at line 76 of file map.cpp.

References unit::clone(), insert(), p, and self_check().

Referenced by BOOST_AUTO_TEST_CASE(), editor::editor_action_unit::perform_without_undo(), temporary_unit_placer::temporary_unit_placer(), and unit_map().

begin() [1/2]

unit_iterator unit_map::begin ( )

inline

Definition at line 418 of file map.hpp.

References begin_core(), and make_unit_iterator().

Referenced by ai::readonly_context_impl::calculate_moves(), actions::check_recall_location(), actions::check_recruit_location(), ai::ai_default_rca::move_to_targets_phase::choose_move(), events::mouse_handler::cycle_units(), ai::stage_unit_formulas::do_play_stage(), ai::ai_default_rca::goto_phase::evaluate(), ai::ai_default_rca::get_healing_phase::evaluate(), ai::ai_default_rca::retreat_phase::evaluate(), wfl::move_candidate_action::evaluate(), wfl::attack_candidate_action::evaluate(), find_first_leader(), find_leader(), find_leaders(), ai::default_ai_context_impl::find_targets(), unit_filter::first_match_on_map(), actions::get_recalls(), actions::get_recruits(), ai::formula_ai::get_value(), ai::ai_default_rca::get_villages_phase::get_villages(), impl_unit_type_next(), unit_map::iterator_base< iter_types >::operator--(), game_board::replace_map(), events::mouse_handler::select_hex(), gui2::dialogs::unit_mode_controller::show_array(), gui2::dialogs::unit_mode_controller::show_unit(), gui2::dialogs::show_unit_list(), gui2::dialogs::unit_mode_controller::show_var(), game_state::side_can_recruit_on(), and verify().

begin() [2/2]

const_unit_iterator unit_map::begin ( ) const

inline

Definition at line 423 of file map.hpp.

References begin_core(), and make_const_unit_iterator().

begin_core()

unit_map::umap::iterator unit_map::begin_core ( ) const

private

Definition at line 64 of file map.cpp.

References i, self_check(), and umap_.

Referenced by begin().

clear()

void unit_map::clear

(

bool

force = false

)

Definition at line 244 of file map.cpp.

References DBG_NG, i, is_valid(), lmap_, num_iters(), and umap_.

Referenced by ~unit_map().

count()

std::size_t unit_map::count ( const map_location &  loc ) const

inline

Definition at line 413 of file map.hpp.

References lmap_.

Referenced by ai::ai_default_rca::move_cost_calculator::cost(), ai::ai_default_rca::move_leader_to_keep_phase::evaluate(), ai::attack_analysis::execute_self(), ai::default_ai_context_impl::find_targets(), ai::ai_default_rca::move_to_targets_phase::form_group(), wfl::attack_map_callable::get_value(), game_display::highlight_hex(), ai::ai_default_rca::move_to_targets_phase::move_group(), and verify().

empty()

bool unit_map::empty ( ) const

inline

Definition at line 445 of file map.hpp.

References lmap_.

Referenced by editor::editor_controller::can_execute_command().

end() [1/2]

unit_iterator unit_map::end ( )

inline

Definition at line 428 of file map.hpp.

References make_unit_iterator(), and umap_.

Referenced by unit::ability_active(), ai::ai_default_rca::move_to_targets_phase::access_points(), scoped_xy_unit::activate(), ai::attack_analysis::analyze(), wb::move::apply_temp_modifier(), backstab_check(), BOOST_AUTO_TEST_CASE(), ai::readonly_context_impl::calculate_moves(), editor::editor_controller::can_execute_command(), editor::editor_controller::change_unit_id(), actions::check_recall_location(), actions::check_recruit_location(), ai::ai_default_rca::move_to_targets_phase::choose_move(), actions::shroud_clearer::clear_unit(), editor::mouse_action_unit::click_left(), wfl::attack_map_callable::collect_possible_attacks(), ai::default_ai_context_impl::count_free_hexes_in_castle(), events::mouse_handler::cycle_units(), ai::ai_default_rca::aspect_attacks_base::do_attack_analysis(), ai::stage_unit_formulas::do_play_stage(), editor::mouse_action_unit::drag_end_left(), display::draw_invalidated(), game_display::draw_movement_info(), ai::ai_default_rca::goto_phase::evaluate(), ai::ai_default_rca::get_healing_phase::evaluate(), ai::ai_default_rca::retreat_phase::evaluate(), wfl::move_candidate_action::evaluate(), wfl::attack_candidate_action::evaluate(), ai::ai_default_rca::get_villages_phase::execute(), wfl::set_unit_var_callable::execute_self(), ai::attack_analysis::execute_self(), unit_filter_impl::unit_filter_compound::fill(), find_first_leader(), find_leader(), find_leaders(), ai::default_ai_context_impl::find_targets(), events::mouse_handler::find_unit(), find_unit_ptr(), pathfind::find_vacant_tile(), game_board::find_visible_unit(), actions::shroud_clearer::fire_events(), unit_filter::first_match_on_map(), footsteps_images(), ai::ai_default_rca::move_to_targets_phase::form_group(), unit::get_abilities(), unit::get_ability_bool(), tod_manager::get_illuminated_time_of_day(), gui2::dialogs::game_stats::get_leader(), actions::get_recalls(), actions::get_recruits(), gui2::dialogs::get_title_suffix(), ai::formula_ai::get_value(), ai::ai_default_rca::get_villages_phase::get_villages(), game_board::get_visible_unit(), unit::halo_or_icon_abilities(), has_unit_at(), attack_type::has_weapon_ability(), impl_unit_type_next(), ai::default_recruitment::recruitment::is_enemy_in_radius(), editor::mouse_action_unit::move(), ai::ai_default_rca::move_to_targets_phase::move_group(), actions::move_unit_and_record(), wb::manager::on_mouseover_change(), game_events::filter_attack::operator()(), unit_map::iterator_base< iter_types >::operator++(), editor::editor_action_unit_delete::perform(), editor::editor_action_unit_facing::perform_without_undo(), ai::readonly_context_impl::power_projection(), ai::ai_default_rca::move_to_targets_phase::rate_group(), editor::editor_controller::rename_unit(), game_board::replace_map(), actions::move_unit_spectator::reset(), actions::undo::reset_adjacent(), unit_display::reset_helpers(), events::mouse_handler::select_hex(), ai::formula_ai::shortest_path_calculator(), gui2::dialogs::unit_mode_controller::show_list(), gui2::dialogs::show_unit_list(), gui2::dialogs::team_mode_controller::show_units(), game_state::side_can_recruit_on(), attack_type::special_active_impl(), actions::undo::move_action::undo(), actions::undo::recall_action::undo(), actions::undo::recruit_action::undo(), editor::editor_controller::unit_description(), unit_display::unit_recruited(), unit_map::iterator_base< iter_types >::valid_entry(), unit_map::iterator_base< iter_types >::valid_exit(), verify(), and attack_type::weapon_specials_impl_adj().

end() [2/2]

const_unit_iterator unit_map::end ( ) const

inline

Definition at line 433 of file map.hpp.

References make_const_unit_iterator(), and umap_.

erase() [1/2]

std::size_t unit_map::erase

(

const map_location &

l

)

Erases the unit at location l, if any.

Returns

the number of erased units (0 or 1).

Definition at line 289 of file map.cpp.

References extract(), and self_check().

Referenced by advance_unit(), erase(), game_lua_kernel::intf_erase_unit(), game_lua_kernel::intf_put_recall_unit(), game_lua_kernel::intf_put_unit(), editor::editor_action_unit_delete::perform_without_undo(), replace(), game_board::replace_map(), SYNCED_COMMAND_HANDLER_FUNCTION(), actions::undo::recall_action::undo(), actions::undo::recruit_action::undo(), and temporary_unit_placer::~temporary_unit_placer().

erase() [2/2]

template<typename T >

std::size_t unit_map::erase

(

const T &

iter

)

Erases a unit given by a pointer or an iterator.

Precondition

The unit is on the map.

Definition at line 601 of file map.hpp.

References erase().

extract()

unit_ptr unit_map::extract

(

const map_location &

loc

)

Extracts a unit from the map.

The unit is no longer owned by the map. It can be reinserted later, if needed.

Definition at line 259 of file map.cpp.

References DBG_NG, i, lmap_, self_check(), and umap_.

Referenced by ai::attack_analysis::analyze(), wb::suppose_dead::apply_temp_modifier(), BOOST_AUTO_TEST_CASE(), erase(), game_lua_kernel::intf_extract_unit(), wb::recall::remove_temp_modifier(), and wb::recruit::remove_temp_modifier().

find() [1/4]

unit_map::unit_iterator unit_map::find

(

const map_location &

loc

)

Definition at line 314 of file map.cpp.

References lmap_, and self_check().

find() [2/4]

const_unit_iterator unit_map::find ( const map_location &  loc ) const

inline

Definition at line 376 of file map.hpp.

References find().

find() [3/4]

unit_map::unit_iterator unit_map::find

(

std::size_t

id

)

Definition at line 302 of file map.cpp.

References i, self_check(), and umap_.

Referenced by unit::ability_active(), ai::ai_default_rca::move_to_targets_phase::access_points(), scoped_xy_unit::activate(), unit_creator::add_unit(), replay::add_unit_checksum(), advance_unit(), ai::attack_analysis::analyze(), wb::move::apply_temp_modifier(), attack_unit_and_advance(), backstab_check(), battle_context::battle_context(), ai::readonly_context_impl::best_defensive_position(), BOOST_AUTO_TEST_CASE(), editor::editor_controller::can_execute_command(), editor::editor_controller::change_unit_id(), ai::readonly_context_impl::check_attack_action(), actions::check_recall_location(), actions::check_recruit_location(), wb::move::check_validity(), wb::suppose_dead::check_validity(), ai::ai_default_rca::move_to_targets_phase::choose_move(), actions::shroud_clearer::clear_unit(), editor::mouse_action_unit::click_left(), wfl::attack_map_callable::collect_possible_attacks(), ai::default_ai_context_impl::count_free_hexes_in_castle(), wfl::gamestate::DEFINE_WFL_FUNCTION(), ai::ai_default_rca::aspect_attacks_base::do_attack_analysis(), ai::recall_result::do_check_after(), ai::recruit_result::do_check_after(), ai::stopunit_result::do_check_after(), ai::attack_result::do_check_before(), ai::attack_result::do_execute(), ai::move_result::do_execute(), ai::stopunit_result::do_execute(), editor::editor_controller::do_execute_command(), do_replay_handle(), editor::mouse_action_unit::drag_end_left(), display::draw_invalidated(), game_display::draw_movement_info(), ai::ai_default_rca::goto_phase::evaluate(), ai::ai_default_rca::combat_phase::evaluate(), ai::ai_default_rca::move_leader_to_keep_phase::evaluate(), ai::ai_default_rca::get_healing_phase::evaluate(), ai::ai_default_rca::get_villages_phase::execute(), ai::ai_default_rca::leader_shares_keep_phase::execute(), wb::attack::execute(), wb::move::execute(), wb::recruit::execute(), ai::readwrite_context_impl::execute_attack_action(), wfl::set_unit_var_callable::execute_self(), ai::attack_analysis::execute_self(), unit_filter_impl::unit_filter_compound::fill(), find(), game_board::find_unit(), find_unit_ptr(), pathfind::find_vacant_tile(), ai::ai_default_rca::get_villages_phase::find_villages(), game_board::find_visible_unit(), actions::shroud_clearer::fire_events(), footsteps_images(), ai::ai_default_rca::move_to_targets_phase::form_group(), lua_unit::get(), unit::get_abilities(), unit::get_ability_bool(), editor::editor_controller::get_action_state(), tod_manager::get_illuminated_time_of_day(), actions::get_recalls(), actions::get_recruits(), lua_unit::get_shared(), wb::manager::get_temp_move_unit(), ai::move_result::get_unit(), ai::stopunit_result::get_unit(), game_events::entity_location::get_unit(), wb::move::get_unit(), wb::suppose_dead::get_unit(), display_context::get_visible_unit(), display_context::get_visible_unit_shared_ptr(), unit::halo_or_icon_abilities(), has_unit_at(), game_board::has_visible_unit(), attack_type::has_weapon_ability(), ai::helper_advance_unit(), impl_unit_type_next(), game_lua_kernel::intf_find_cost_map(), game_lua_kernel::intf_find_path(), game_lua_kernel::intf_find_reach(), game_lua_kernel::intf_find_vision_range(), game_lua_kernel::intf_get_unit(), game_lua_kernel::intf_teleport(), ai::default_recruitment::recruitment::is_enemy_in_radius(), ai::lua_sticky_candidate_action_wrapper::lua_sticky_candidate_action_wrapper(), luaW_pushfaivariant(), pathfind::mark_route(), terrain_filter::match_internal(), unit_animation::matches(), wb::move::move(), editor::mouse_action_unit::move(), ai::ai_default_rca::move_to_targets_phase::move_group(), events::mouse_handler::move_unit_along_route(), actions::move_unit_and_record(), wb::manager::on_mouseover_change(), game_events::filter_unit::operator()(), game_events::filter_attack::operator()(), editor::editor_action_unit_delete::perform(), editor::editor_action_unit::perform_without_undo(), editor::editor_action_unit_replace::perform_without_undo(), editor::editor_action_unit_facing::perform_without_undo(), wb::manager::post_draw(), ai::readonly_context_impl::power_projection(), wb::manager::pre_draw(), ai::ai_default_rca::move_to_targets_phase::rate_group(), wb::move::remove_temp_modifier(), wb::suppose_dead::remove_temp_modifier(), editor::editor_controller::rename_unit(), actions::undo::reset_adjacent(), unit_display::reset_helpers(), events::mouse_handler::select_hex(), wb::highlighter::set_mouseover_hex(), ai::formula_ai::shortest_path_calculator(), events::mouse_handler::show_attack_dialog(), events::mouse_handler::show_attack_options(), game_state::side_can_recruit_on(), ai::simulated_attack(), ai::simulated_stopunit(), attack_type::special_active_impl(), wb::suppose_dead::suppose_dead(), SYNCED_COMMAND_HANDLER_FUNCTION(), pathfind::teleport_map::teleport_map(), actions::undo::move_action::undo(), actions::undo::recall_action::undo(), actions::undo::recruit_action::undo(), unit_display::unit_attack(), display_context::unit_can_move(), editor::editor_controller::unit_description(), unit_display::unit_recruited(), verify(), pathfind::vision_path::vision_path(), attack_type::weapon_specials_impl_adj(), and display_context::would_be_discovered().

find() [4/4]

const_unit_iterator unit_map::find ( std::size_t  id ) const

inline

Definition at line 381 of file map.hpp.

References find().

find_first_leader()

unit_map::unit_iterator unit_map::find_first_leader

(

int

side

)

Definition at line 332 of file map.cpp.

References begin(), end(), and i.

find_leader() [1/2]

unit_map::unit_iterator unit_map::find_leader

(

int

side

)

Definition at line 320 of file map.cpp.

References begin(), end(), and i.

Referenced by ai::ai_default_rca::get_villages_phase::evaluate(), ai::ai_default_rca::get_villages_phase::execute(), ai::ai_default_rca::move_to_targets_phase::execute(), find_leader(), unit_creator::find_location(), ai::default_ai_context_impl::find_targets(), gui2::dialogs::game_stats::get_leader(), gui2::dialogs::get_title_suffix(), ai::formula_ai::get_value(), ai::helper_check_village(), ai::readonly_context_impl::leader_can_reach_keep(), ai::readonly_context_impl::recalculate_move_maps(), game_display::scroll_to_leader(), game_board::side_change_controller(), game_board::side_drop_to(), and game_board::team_is_defeated().

find_leader() [2/2]

const_unit_iterator unit_map::find_leader ( int  side ) const

inline

Definition at line 402 of file map.hpp.

References find_leader().

find_leaders() [1/2]

std::vector< unit_map::unit_iterator > unit_map::find_leaders

(

int

side

)

Definition at line 348 of file map.cpp.

References begin(), end(), and i.

Referenced by ai::default_recruitment::recruitment::do_combat_analysis(), ai::ai_default_rca::move_leader_to_goals_phase::evaluate(), ai::ai_default_rca::move_leader_to_keep_phase::evaluate(), ai::ai_default_rca::retreat_phase::evaluate(), ai::ai_default_rca::leader_shares_keep_phase::evaluate(), ai::default_recruitment::recruitment::evaluate(), ai::ai_default_rca::leader_shares_keep_phase::execute(), ai::default_recruitment::recruitment::execute(), find_leaders(), ai::default_recruitment::recruitment::get_cost_map_of_side(), and game_events::WML_HANDLER_FUNCTION().

find_leaders() [2/2]

std::vector< unit_map::const_unit_iterator > unit_map::find_leaders

(

int

side

)

const

Definition at line 362 of file map.cpp.

References find_leaders().

find_unit_ptr() [1/2]

template<typename T >

unit_ptr unit_map::find_unit_ptr ( const T &  val )

inline

Definition at line 387 of file map.hpp.

References end(), and find().

Referenced by temporary_unit_mover::temporary_unit_mover(), and temporary_unit_mover::~temporary_unit_mover().

find_unit_ptr() [2/2]

template<typename T >

unit_const_ptr unit_map::find_unit_ptr ( const T &  val ) const

inline

Definition at line 394 of file map.hpp.

References end(), and find().

has_unit()

bool unit_map::has_unit

(

const unit *const

u

)

const

Is the unit in the map?

Precondition

u != nullptr

Parameters

u	Pointer to the unit to find.

Returns

True if found, false otherwise.

Definition at line 422 of file map.cpp.

References umap_.

has_unit_at()

bool unit_map::has_unit_at

(

const map_location &

loc

)

const

Tests whether a unit exists at the given location.

Definition at line 435 of file map.cpp.

References end(), and find().

insert()

unit_map::umap_retval_pair_t unit_map::insert

(

unit_ptr

p

)

Inserts the unit pointed to by p into the map.

If insertion into either the unit or location map fails, all operations are reverted.

The one oddity is that to facilitate non-invalidating iterators, the list sometimes has nullptr pointers which should be used when they correspond to uids previously used.

Returns

A pair consisting of an iterator pointing to the new unit (or the unit already occupying that location) and a bool indicating success.

Note

It is 3 times as fast to attempt to insert a unit at l and check for success than it is to verify that the location is empty, insert the unit, and then check the location for the unit.

If the unit::underlying_id is already in use, a new one will be generated.

The map takes ownership of the pointed object only if the operation succeeds.

Definition at line 135 of file map.cpp.

References DBG_NG, ERR_NG, lmap_, make_unit_iterator(), unit::name(), p, unit_map::unit_pod::ref_count, self_check(), umap_, unit_map::unit_pod::unit, and map_location::valid().

Referenced by add(), advance_unit(), ai::attack_analysis::analyze(), wb::recall::apply_temp_modifier(), wb::recruit::apply_temp_modifier(), BOOST_AUTO_TEST_CASE(), ai::default_ai_context_impl::count_free_hexes_in_castle(), ai::default_recruitment::recruitment::do_combat_analysis(), ai::helper_place_unit(), game_lua_kernel::intf_put_unit(), editor::map_context::load_scenario(), actions::place_recruit(), wb::suppose_dead::remove_temp_modifier(), replace(), SYNCED_COMMAND_HANDLER_FUNCTION(), temporary_unit_mover::~temporary_unit_mover(), temporary_unit_placer::~temporary_unit_placer(), and temporary_unit_remover::~temporary_unit_remover().

is_found() [1/2]

bool unit_map::is_found ( const lmap::const_iterator &  i ) const

inlineprivate

Definition at line 560 of file map.hpp.

References i, and lmap_.

is_found() [2/2]

bool unit_map::is_found ( const umap::const_iterator &  i ) const

inlineprivate

Definition at line 555 of file map.hpp.

References i, and umap_.

Referenced by is_valid(), make_const_unit_iterator(), and make_unit_iterator().

is_valid() [1/2]

bool unit_map::is_valid ( const lmap::const_iterator &  i ) const

inlineprivate

Definition at line 550 of file map.hpp.

References i, and is_found().

is_valid() [2/2]

bool unit_map::is_valid ( const umap::const_iterator &  i ) const

inlineprivate

Definition at line 545 of file map.hpp.

References i, and is_found().

Referenced by clear().

make_const_unit_iterator()

template<typename X >

unit_map::const_unit_iterator unit_map::make_const_unit_iterator ( const X &  i ) const

inlineprivate

Definition at line 576 of file map.hpp.

References i, is_found(), and umap_.

Referenced by begin(), and end().

make_unit_iterator()

template<typename X >

unit_map::unit_iterator unit_map::make_unit_iterator ( const X &  i )

inlineprivate

Definition at line 566 of file map.hpp.

References i, is_found(), and umap_.

Referenced by begin(), end(), insert(), and move().

move()

unit_map::umap_retval_pair_t unit_map::move	(	const map_location &	src,
		const map_location &	dst
	)

Moves a unit from location src to location dst.

Returns

A pair consisting of an iterator pointing to the new unit (or the unit already occupying that location) and a bool indicating success.

Note

It is 3 times as fast to attempt to insert a unit at l and check for success than it is to verify that the location is empty, insert the unit, and then check the location for the unit.

Definition at line 92 of file map.cpp.

References DBG_NG, display::get_singleton(), i, display::invalidate(), lmap_, make_unit_iterator(), p, and self_check().

Referenced by ai::attack_analysis::analyze(), game_lua_kernel::intf_teleport(), editor::editor_action_unit_replace::perform_without_undo(), ai::simulated_move(), temporary_unit_mover::temporary_unit_mover(), actions::undo::move_action::undo(), and temporary_unit_mover::~temporary_unit_mover().

num_iters()

std::size_t unit_map::num_iters

(

)

const

Add up number of extant iterators

Definition at line 224 of file map.cpp.

References umap_.

Referenced by clear(), and swap().

operator=()

unit_map & unit_map::operator=

(

const unit_map &

that

)

Definition at line 44 of file map.cpp.

References swap().

replace()

unit_map::umap_retval_pair_t unit_map::replace	(	const map_location &	l,
		unit_ptr	p
	)

Works like unit_map::add; but l is emptied first, if needed.

Returns

A pair consisting of an iterator pointing to the new unit (or the unit already occupying that location) and a bool indicating success.

Definition at line 216 of file map.cpp.

References erase(), insert(), p, and self_check().

Referenced by unit_creator::add_unit(), ai::helper_advance_unit(), lua_unit::put_map(), and SYNCED_COMMAND_HANDLER_FUNCTION().

self_check()

bool unit_map::self_check

(

)

const

Checks invariants.

For debugging purposes only. Doesn't do anything in non-debug mode.

Definition at line 370 of file map.cpp.

References ERR_NG, good, lmap_, and umap_.

Referenced by add(), begin_core(), erase(), extract(), find(), insert(), move(), and replace().

size()

std::size_t unit_map::size ( ) const

inline

Definition at line 438 of file map.hpp.

References lmap_.

Referenced by BOOST_AUTO_TEST_CASE(), and verify().

swap()

void unit_map::swap

(

unit_map &

o

)

Definition at line 51 of file map.cpp.

References lmap_, num_iters(), swap(), and umap_.

Referenced by operator=(), and swap().

Member Data Documentation

lmap_

lmap unit_map::lmap_

private

location -> umap::iterator.

Definition at line 594 of file map.hpp.

Referenced by clear(), count(), empty(), extract(), find(), insert(), is_found(), move(), self_check(), size(), and swap().

umap_

umap unit_map::umap_

mutableprivate

underlying_id -> unit_pod.

This requires that underlying_id be unique (which is enforced in unit_map::insert).

Definition at line 589 of file map.hpp.

Referenced by begin_core(), clear(), end(), extract(), find(), has_unit(), insert(), is_found(), make_const_unit_iterator(), make_unit_iterator(), num_iters(), self_check(), and swap().

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The documentation for this class was generated from the following files:

• units/map.hpp
• units/map.cpp