Use std::string_view in mod_tracker

src/bionics.cpp

@@ -306,7 +306,7 @@ static social_modifiers load_bionic_social_mods( const JsonObject &jo )
     return ret;
 }
 
-void bionic_data::load( const JsonObject &jsobj, const std::string &src )
+void bionic_data::load( const JsonObject &jsobj, const std::string_view src )
 {
 
     mandatory( jsobj, was_loaded, "id", id );

src/bionics.h

@@ -184,7 +184,7 @@ struct bionic_data {
 
     itype_id itype() const;
 
-    void load( const JsonObject &obj, const std::string &src );
+    void load( const JsonObject &obj, std::string_view src );
     void finalize();
     static void load_bionic( const JsonObject &jo, const std::string &src );
     static void finalize_bionic();

src/effect_on_condition.cpp

@@ -117,7 +117,7 @@ void effect_on_condition::load( const JsonObject &jo, const std::string_view )
 }
 
 effect_on_condition_id effect_on_conditions::load_inline_eoc( const JsonValue &jv,
-        const std::string &src )
+        std::string_view src )
 {
     if( jv.test_string() ) {
         return effect_on_condition_id( jv.get_string() );

src/effect_on_condition.h

@@ -96,7 +96,7 @@ void load_new_character( Character &you );
 /** Load any new eocs that don't exist in the save. */
 void load_existing_character( Character &you );
 /** Loads an inline eoc */
-effect_on_condition_id load_inline_eoc( const JsonValue &jv, const std::string &src );
+effect_on_condition_id load_inline_eoc( const JsonValue &jv, std::string_view src );
 /** queue an eoc to happen in the future */
 void queue_effect_on_condition( time_duration duration, effect_on_condition_id eoc,
                                 Character &you, const std::unordered_map<std::string, std::string> &context );

src/item_factory.cpp

@@ -4471,10 +4471,7 @@ void Item_factory::load_basic_info( const JsonObject &jo, itype &def, const std:
     check_and_create_magazine_pockets( def );
     add_special_pockets( def );
 
-    if( !def.src.empty() && def.src.back().first != def.id ) {
-        def.src.clear();
-    }
-    def.src.emplace_back( def.id, mod_id( src ) );
+    mod_tracker::assign_src( def, src );
 
     if( def.magazines.empty() ) {
         migrate_mag_from_pockets( def );

src/martialarts.cpp

@@ -261,7 +261,7 @@ void ma_requirements::load( const JsonObject &jo, const std::string_view )
     optional( jo, was_loaded, "weapon_damage_requirements", min_damage, ma_weapon_damage_reader {} );
 }
 
-void ma_technique::load( const JsonObject &jo, const std::string &src )
+void ma_technique::load( const JsonObject &jo, const std::string_view src )
 {
     mandatory( jo, was_loaded, "name", name );
     optional( jo, was_loaded, "description", description, translation() );
@@ -405,7 +405,7 @@ class ma_buff_reader : public generic_typed_reader<ma_buff_reader>
         }
 };
 
-void martialart::load( const JsonObject &jo, const std::string &src )
+void martialart::load( const JsonObject &jo, const std::string_view src )
 {
     mandatory( jo, was_loaded, "name", name );
     mandatory( jo, was_loaded, "description", description );

src/martialarts.h

@@ -163,7 +163,7 @@ class ma_technique
     public:
         ma_technique();
 
-        void load( const JsonObject &jo, const std::string &src );
+        void load( const JsonObject &jo, std::string_view src );
         static void verify_ma_techniques();
         void check() const;
 
@@ -326,7 +326,7 @@ class martialart
     public:
         martialart();
 
-        void load( const JsonObject &jo, const std::string &src );
+        void load( const JsonObject &jo, std::string_view src );
 
         void remove_all_buffs( Character &u ) const;
 

src/mod_tracker.h

@@ -47,7 +47,7 @@ struct has_src_member<T, std::void_t<decltype( std::declval<T &>().src.emplace_b
 
     /** If those conditions are satisfied, keep track of where this item has been modified */
     template<typename T, typename std::enable_if_t<has_src_member<T>::value > * = nullptr>
-    static void assign_src( T &def, const std::string &src ) {
+    static void assign_src( T &def, const std::string_view src ) {
         // We need to make sure we're keeping where this entity has been loaded
         // If the id this was last loaded with is not this one, discard the history and start again
         if( !def.src.empty() && def.src.back().first != def.id ) {

src/mutation.h

@@ -400,7 +400,7 @@ struct mutation_branch {
         // For init.cpp: reset (clear) the mutation data
         static void reset_all();
         // For init.cpp: load mutation data from json
-        void load( const JsonObject &jo, const std::string &src );
+        void load( const JsonObject &jo, std::string_view src );
         static void load_trait( const JsonObject &jo, const std::string &src );
         // For init.cpp: check internal consistency (valid ids etc.) of all mutations
         static void check_consistency();

src/mutation_data.cpp

@@ -299,7 +299,7 @@ void mutation_variant::deserialize( const JsonObject &jo )
     load( jo );
 }
 
-void mutation_branch::load( const JsonObject &jo, const std::string &src )
+void mutation_branch::load( const JsonObject &jo, const std::string_view src )
 {
     mandatory( jo, was_loaded, "name", raw_name );
     mandatory( jo, was_loaded, "description", raw_desc );