Add HasIndex to ideology

Author: wvpm

src/openvic-simulation/politics/Ideology.cpp

@@ -10,6 +10,7 @@ IdeologyGroup::IdeologyGroup(std::string_view new_identifier) : HasIdentifier {
 
 Ideology::Ideology(
 	std::string_view new_identifier,
+	index_t new_index,
 	colour_t new_colour,
 	IdeologyGroup const& new_group,
 	bool new_uncivilised,
@@ -23,6 +24,7 @@ Ideology::Ideology(
 	ConditionalWeightBase&& new_add_military_reform,
 	ConditionalWeightBase&& new_add_economic_reform
 ) : HasIdentifierAndColour { new_identifier, new_colour, false },
+	HasIndex { new_index },
 	group { new_group },
 	uncivilised { new_uncivilised },
 	can_reduce_consciousness { new_can_reduce_consciousness },
@@ -82,8 +84,10 @@ bool IdeologyManager::add_ideology(
 		return false;
 	}
 
+	const Ideology::index_t new_index = ideologies.size();
 	return ideologies.add_item({
 		identifier,
+		new_index,
 		colour,
 		*group,
 		uncivilised,

src/openvic-simulation/politics/Ideology.hpp

@@ -16,7 +16,7 @@ namespace OpenVic {
 		IdeologyGroup(IdeologyGroup&&) = default;
 	};
 
-	struct Ideology : HasIdentifierAndColour {
+	struct Ideology : HasIdentifierAndColour, HasIndex<Ideology> {
 		friend struct IdeologyManager;
 
 		static constexpr colour_t NO_IDEOLOGY_COLOUR = colour_t::fill_as(colour_t::max_value);
@@ -38,6 +38,7 @@ namespace OpenVic {
 
 		Ideology(
 			std::string_view new_identifier,
+			index_t new_index,
 			colour_t new_colour,
 			IdeologyGroup const& new_group,
 			bool new_uncivilised,