diff --git a/xcode/indexer/indexer.xcodeproj/project.pbxproj b/xcode/indexer/indexer.xcodeproj/project.pbxproj
index ba80fcd07b..e5011519e6 100644
--- a/xcode/indexer/indexer.xcodeproj/project.pbxproj
+++ b/xcode/indexer/indexer.xcodeproj/project.pbxproj
@@ -152,6 +152,9 @@
 		6758AED31BB4413000C26E27 /* drules_selector.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 6758AECF1BB4413000C26E27 /* drules_selector.cpp */; };
 		6758AED41BB4413000C26E27 /* drules_selector.hpp in Headers */ = {isa = PBXBuildFile; fileRef = 6758AED01BB4413000C26E27 /* drules_selector.hpp */; };
 		67F183731BD4FCF500AB1840 /* map_style.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 67F183721BD4FCF500AB1840 /* map_style.cpp */; };
+		E90547481D1153C70096F4FA /* string_set.hpp in Headers */ = {isa = PBXBuildFile; fileRef = E90547451D1153C70096F4FA /* string_set.hpp */; };
+		E90547491D1153C70096F4FA /* string_slice.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E90547461D1153C70096F4FA /* string_slice.cpp */; };
+		E905474A1D1153C70096F4FA /* string_slice.hpp in Headers */ = {isa = PBXBuildFile; fileRef = E90547471D1153C70096F4FA /* string_slice.hpp */; };
 		E906DE381CF44917004C4F5E /* postcodes_matcher_tests.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E906DE371CF44917004C4F5E /* postcodes_matcher_tests.cpp */; };
 		E906DE3B1CF44934004C4F5E /* postcodes_matcher.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E906DE391CF44934004C4F5E /* postcodes_matcher.cpp */; };
 		E906DE3C1CF44934004C4F5E /* postcodes_matcher.hpp in Headers */ = {isa = PBXBuildFile; fileRef = E906DE3A1CF44934004C4F5E /* postcodes_matcher.hpp */; };
@@ -325,6 +328,9 @@
 		6758AECF1BB4413000C26E27 /* drules_selector.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = drules_selector.cpp; sourceTree = "<group>"; };
 		6758AED01BB4413000C26E27 /* drules_selector.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = drules_selector.hpp; sourceTree = "<group>"; };
 		67F183721BD4FCF500AB1840 /* map_style.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = map_style.cpp; sourceTree = "<group>"; };
+		E90547451D1153C70096F4FA /* string_set.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = string_set.hpp; sourceTree = "<group>"; };
+		E90547461D1153C70096F4FA /* string_slice.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = string_slice.cpp; sourceTree = "<group>"; };
+		E90547471D1153C70096F4FA /* string_slice.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = string_slice.hpp; sourceTree = "<group>"; };
 		E906DE371CF44917004C4F5E /* postcodes_matcher_tests.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = postcodes_matcher_tests.cpp; sourceTree = "<group>"; };
 		E906DE391CF44934004C4F5E /* postcodes_matcher.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = postcodes_matcher.cpp; sourceTree = "<group>"; };
 		E906DE3A1CF44934004C4F5E /* postcodes_matcher.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = postcodes_matcher.hpp; sourceTree = "<group>"; };
@@ -452,6 +458,9 @@
 		6753409C1A3F53CB00A0A8C3 /* indexer */ = {
 			isa = PBXGroup;
 			children = (
+				E90547451D1153C70096F4FA /* string_set.hpp */,
+				E90547461D1153C70096F4FA /* string_slice.cpp */,
+				E90547471D1153C70096F4FA /* string_slice.hpp */,
 				E906DE391CF44934004C4F5E /* postcodes_matcher.cpp */,
 				E906DE3A1CF44934004C4F5E /* postcodes_matcher.hpp */,
 				F6381BF71CD26C9C004CA943 /* new_feature_categories.cpp */,
@@ -578,6 +587,7 @@
 			files = (
 				E906DE3C1CF44934004C4F5E /* postcodes_matcher.hpp in Headers */,
 				6753414E1A3F540F00A0A8C3 /* types_mapping.hpp in Headers */,
+				E90547481D1153C70096F4FA /* string_set.hpp in Headers */,
 				6753411F1A3F540F00A0A8C3 /* feature_loader.hpp in Headers */,
 				675341151A3F540F00A0A8C3 /* feature_covering.hpp in Headers */,
 				34583BC81C88552100F94664 /* cuisines.hpp in Headers */,
@@ -604,6 +614,7 @@
 				56C74C251C749E4700B71B9F /* search_string_utils.hpp in Headers */,
 				6753410C1A3F540F00A0A8C3 /* drawing_rule_def.hpp in Headers */,
 				675341001A3F540F00A0A8C3 /* cell_id.hpp in Headers */,
+				E905474A1D1153C70096F4FA /* string_slice.hpp in Headers */,
 				670D04AD1B0BA8580013A7AC /* interval_index_101.hpp in Headers */,
 				675341271A3F540F00A0A8C3 /* features_vector.hpp in Headers */,
 				6753413D1A3F540F00A0A8C3 /* scale_index_builder.hpp in Headers */,
@@ -740,6 +751,7 @@
 				6753411A1A3F540F00A0A8C3 /* feature_impl.cpp in Sources */,
 				670C61111AB065B100C38A8C /* geometry_coding_test.cpp in Sources */,
 				56C74C1C1C749E4700B71B9F /* categories_holder_loader.cpp in Sources */,
+				E90547491D1153C70096F4FA /* string_slice.cpp in Sources */,
 				6753410D1A3F540F00A0A8C3 /* drawing_rules.cpp in Sources */,
 				670C611E1AB065B100C38A8C /* visibility_test.cpp in Sources */,
 				675341301A3F540F00A0A8C3 /* index.cpp in Sources */,