perf: Rework system variables

parser_library/src/context/code_scope.h

@@ -16,22 +16,20 @@
 #define CONTEXT_CODE_SCOPE_H
 
 #include "macro.h"
-#include "variables/set_symbol.h"
-#include "variables/system_variable.h"
+#include "utils/time.h"
 
 namespace hlasm_plugin::parser_library::context {
+class location_counter;
+class set_symbol_base;
 
 // helper struct for HLASM code scopes
 // contains locally valid set symbols, sequence symbols and pointer to macro class (if code is in any)
 struct code_scope
 {
-    using set_sym_storage = std::unordered_map<id_index, std::shared_ptr<set_symbol_base>>;
-    using sys_sym_storage = std::unordered_map<id_index, std::shared_ptr<system_variable>>;
+    using set_sym_storage = std::unordered_map<id_index, std::pair<std::shared_ptr<set_symbol_base>, bool>>;
 
     // local variables of scope
     set_sym_storage variables;
-    // local system variables of scope
-    sys_sym_storage system_variables;
     // gets macro to which this scope belong (nullptr if in open code)
     std::unique_ptr<macro_invocation> this_macro;
     // the ACTR branch counter
@@ -40,6 +38,12 @@ struct code_scope
     size_t branch_counter_change = 0;
     // variable for implementing &SYSM_SEV
     unsigned mnote_max_in_scope = 0;
+    // scope creation time
+    utils::timestamp time;
+    // initial location counter
+    location_counter* loctr = nullptr;
+    // scope unique value
+    unsigned long sysndx = 0;
 
     bool is_in_macro() const { return !!this_macro; }