C++ variant::is_list方法代码示例

	BlendEquation::BlendEquation(const variant& node)
		: rgb_(BlendEquationConstants::BE_ADD),
		  alpha_(BlendEquationConstants::BE_ADD)
	{
		if(node.is_map()) {
			if(node.has_key("rgba")) {
				rgb_ = alpha_ = convert_string_to_equation(node["rgba"].as_string());
			} 
			if(node.has_key("rgb")) {
				rgb_ = convert_string_to_equation(node["rgb"].as_string());
			}
			if(node.has_key("alpha")) {
				alpha_ = convert_string_to_equation(node["alpha"].as_string());
			}
			if(node.has_key("a")) {
				alpha_ = convert_string_to_equation(node["a"].as_string());
			}
		} else if(node.is_list()) {
			ASSERT_LOG(node.num_elements() > 0, "When using a list for blend equation must give at least one element");
			if(node.num_elements() == 1) {
				rgb_ = alpha_ = convert_string_to_equation(node[0].as_string());
			} else {
				rgb_   = convert_string_to_equation(node[0].as_string());
				alpha_ = convert_string_to_equation(node[1].as_string());
			}
		} else if(node.is_string()) {
			// simply setting the rgb/alpha values that same, from string
			rgb_ = alpha_ = convert_string_to_equation(node.as_string());
		} else {
			ASSERT_LOG(false, "Unrecognised type for blend equation: " << node.to_debug_string());
		}
	}

	void BlendMode::set(const variant& node) 
	{
		if(node.is_string()) {
			const std::string& blend = node.as_string();
			if(blend == "add") {
				set(BlendModeConstants::BM_ONE, BlendModeConstants::BM_ONE);
			} else if(blend == "alpha_blend") {
				set(BlendModeConstants::BM_SRC_ALPHA, BlendModeConstants::BM_ONE_MINUS_SRC_ALPHA);
			} else if(blend == "colour_blend" || blend == "color_blend") {
				set(BlendModeConstants::BM_SRC_COLOR, BlendModeConstants::BM_ONE_MINUS_SRC_COLOR);
			} else if(blend == "modulate") {
				set(BlendModeConstants::BM_DST_COLOR, BlendModeConstants::BM_ZERO);
			} else if(blend == "src_colour one" || blend == "src_color one") {
				set(BlendModeConstants::BM_SRC_COLOR, BlendModeConstants::BM_ONE);
			} else if(blend == "src_colour zero" || blend == "src_color zero") {
				set(BlendModeConstants::BM_SRC_COLOR, BlendModeConstants::BM_ZERO);
			} else if(blend == "src_colour dest_colour" || blend == "src_color dest_color") {
				set(BlendModeConstants::BM_SRC_COLOR, BlendModeConstants::BM_DST_COLOR);
			} else if(blend == "dest_colour one" || blend == "dest_color one") {
				set(BlendModeConstants::BM_DST_COLOR, BlendModeConstants::BM_ONE);
			} else if(blend == "dest_colour src_colour" || blend == "dest_color src_color") {
				set(BlendModeConstants::BM_DST_COLOR, BlendModeConstants::BM_SRC_COLOR);
			} else {
				ASSERT_LOG(false, "BlendMode: Unrecognised scene_blend mode " << blend);
			}
		} else if(node.is_list() && node.num_elements() >= 2) {
			ASSERT_LOG(node[0].is_string() && node[1].is_string(), 
				"BlendMode: Blend mode must be specified by a list of two strings.");
			set(parse_blend_string(node[0].as_string()), parse_blend_string(node[1].as_string()));
		} else {
			ASSERT_LOG(false, "BlendMode: Setting blend requires either a string or a list of greater than two elements." << node.to_debug_string());
		}
	}

void luaW_pushfaivariant(lua_State* L, variant val) {
	if(val.is_int()) {
		lua_pushinteger(L, val.as_int());
	} else if(val.is_decimal()) {
		lua_pushnumber(L, val.as_decimal() / 1000.0);
	} else if(val.is_string()) {
		const std::string result_string = val.as_string();
		lua_pushlstring(L, result_string.c_str(), result_string.size());
	} else if(val.is_list()) {
		lua_newtable(L);
		for(const variant& v : val.as_list()) {
			lua_pushinteger(L, lua_rawlen(L, -1) + 1);
			luaW_pushfaivariant(L, v);
			lua_settable(L, -3);
		}
	} else if(val.is_map()) {
		typedef std::map<variant,variant>::value_type kv_type;
		lua_newtable(L);
		for(const kv_type& v : val.as_map()) {
			luaW_pushfaivariant(L, v.first);
			luaW_pushfaivariant(L, v.second);
			lua_settable(L, -3);
		}
	} else if(val.is_callable()) {
		// First try a few special cases
		if(unit_callable* u_ref = val.try_convert<unit_callable>()) {
			const unit& u = u_ref->get_unit();
			unit_map::iterator un_it = resources::gameboard->units().find(u.get_location());
			if(&*un_it == &u) {
				luaW_pushunit(L, u.underlying_id());
			} else {
				luaW_pushunit(L, u.side(), u.underlying_id());
			}
		} else if(location_callable* loc_ref = val.try_convert<location_callable>()) {
			luaW_pushlocation(L, loc_ref->loc());
		} else {
			// If those fail, convert generically to a map
			const formula_callable* obj = val.as_callable();
			std::vector<formula_input> inputs;
			obj->get_inputs(&inputs);
			lua_newtable(L);
			for(const formula_input& attr : inputs) {
				if(attr.access == FORMULA_WRITE_ONLY) {
					continue;
				}
				lua_pushstring(L, attr.name.c_str());
				luaW_pushfaivariant(L, obj->query_value(attr.name));
				lua_settable(L, -3);
			}
		}
	} else if(val.is_null()) {
		lua_pushnil(L);
	}
}

void arrow_primitive::set_points(const variant& points)
{
	ASSERT_LOG(points.is_list(), "arrow points is not a list: " << points.debug_location());

	points_.clear();

	for(int n = 0; n != points.num_elements(); ++n) {
		variant p = points[n];
		ASSERT_LOG(p.is_list() && p.num_elements() == 2, "arrow points in invalid format: " << points.debug_location() << " : " << p.write_json());
		FPoint point;
		point[0] = p[0].as_int();
		point[1] = p[1].as_int();
		points_.push_back(point);
	}
}

void playable_custom_object::set_player_value_by_slot(int slot, const variant& value)
{
	switch(slot) {
	case CUSTOM_OBJECT_PLAYER_DIFFICULTY:
		difficulty_ = value.as_int();
	break;
	case CUSTOM_OBJECT_PLAYER_CAN_INTERACT:
		can_interact_ = value.as_int();
	break;
	case CUSTOM_OBJECT_PLAYER_UNDERWATER_CONTROLS:
		underwater_controls_ = value.as_bool();
	break;
	case CUSTOM_OBJECT_PLAYER_VERTICAL_LOOK:
		vertical_look_ = value.as_int();
	break;
	case CUSTOM_OBJECT_PLAYER_CONTROL_LOCK:
		if(value.is_null()) {
			control_lock_.reset();
		} else if(value.is_list()) {
			unsigned char state = 0;
			for(int n = 0; n != value.num_elements(); ++n) {
				ASSERT_LOG(value[n].is_string(), "MEMBER OF control_lock LIST NOT A STRING");
				const std::string& str = value[n].as_string();
				int control_key = -1;
				for(int m = 0; m != sizeof(ctrl)/sizeof(*ctrl); ++m) {
					if(ctrl[m] == str) {
						control_key = m;
						break;
					}
				}

				ASSERT_LOG(control_key != -1, "ILLEGAL STRING SET FOR control_lock: '" << str << "' LEGAL KEYS ARE ctrl_(up|down|left|right|attack|jump)");
				state |= 1 << control_key;
			}

			//destroy the old one before creating a new control_lock,
			//since control_lock objects must be constructed and destroyed
			//in FIFO order.
			control_lock_.reset();
			control_lock_.reset(new controls::local_controls_lock(state));
		} else {
			ASSERT_LOG(false, "BAD VALUE WHEN SETTING control_lock KEY. A LIST OR NULL IS REQUIRED: " << value.to_debug_string());
		}
	break;
	}
}

//commandline=true when we evaluate formula from commandline, false otherwise (default)
variant formula_ai::execute_variant(const variant& var, ai_context &ai_, bool commandline)
{
	std::stack<variant> vars;
	if(var.is_list()) {
		for(size_t n = 1; n <= var.num_elements() ; ++n) {
			vars.push(var[ var.num_elements() - n ]);
		}
	} else {
		vars.push(var);
	}

	std::vector<variant> made_moves;

	variant error;

	unit_map& units = *resources::units;

	while( !vars.empty() ) {

		if(vars.top().is_null()) {
			vars.pop();
			continue;
		}

		variant action = vars.top();
		vars.pop();

		game_logic::safe_call_callable* safe_call = try_convert_variant<game_logic::safe_call_callable>(action);

		if(safe_call) {
		    action = safe_call->get_main();
		}

		const move_callable* move = try_convert_variant<move_callable>(action);
		const move_partial_callable* move_partial = try_convert_variant<move_partial_callable>(action);
		const attack_callable* attack = try_convert_variant<attack_callable>(action);
		const attack_analysis* _attack_analysis = try_convert_variant<attack_analysis>(action);
		const recruit_callable* recruit_command = try_convert_variant<recruit_callable>(action);
		const recall_callable* recall_command = try_convert_variant<recall_callable>(action);
		const set_var_callable* set_var_command = try_convert_variant<set_var_callable>(action);
		const set_unit_var_callable* set_unit_var_command = try_convert_variant<set_unit_var_callable>(action);
		const fallback_callable* fallback_command = try_convert_variant<fallback_callable>(action);

		if( move || move_partial ) {
			move_result_ptr move_result;

			if(move)
				move_result = ai_.execute_move_action(move->src(), move->dst(), true);
			else
				move_result = ai_.execute_move_action(move_partial->src(), move_partial->dst(), false);

			if ( !move_result->is_ok() ) {
				if( move ) {
					LOG_AI << "ERROR #" << move_result->get_status() << " while executing 'move' formula function\n" << std::endl;

					if(safe_call) {
						//safe_call was called, prepare error information
						error = variant(new safe_call_result(move,
									move_result->get_status(), move_result->get_unit_location()));
					}
				} else {
					LOG_AI << "ERROR #" << move_result->get_status() << " while executing 'move_partial' formula function\n" << std::endl;

					if(safe_call) {
						//safe_call was called, prepare error information
						error = variant(new safe_call_result(move_partial,
									move_result->get_status(), move_result->get_unit_location()));
					}
				}
			}

			if( move_result->is_gamestate_changed() )
				made_moves.push_back(action);
		} else if(attack) {
			bool gamestate_changed = false;
			move_result_ptr move_result;

			if( attack->move_from() != attack->src() ) {
				move_result = ai_.execute_move_action(attack->move_from(), attack->src(), false);
				gamestate_changed |= move_result->is_gamestate_changed();

				if (!move_result->is_ok()) {
					//move part failed
					LOG_AI << "ERROR #" << move_result->get_status() << " while executing 'attack' formula function\n" << std::endl;

					if(safe_call) {
						//safe_call was called, prepare error information
						error = variant(new safe_call_result(attack,
								move_result->get_status(), move_result->get_unit_location()));
					}
				}
			}

			if (!move_result || move_result->is_ok() ) {
				//if move wasn't done at all or was done successfully
				attack_result_ptr attack_result = ai_.execute_attack_action(attack->src(), attack->dst(), attack->weapon() );
				gamestate_changed |= attack_result->is_gamestate_changed();
				if (!attack_result->is_ok()) {
					//attack failed
//.........这里部分代码省略.........