Replace Boost shared pointers

Generated with the assistance of an AI coding tool.

src/ifcparse/argument.h

@@ -25,7 +25,7 @@
 
 #include <boost/dynamic_bitset.hpp>
 #include <boost/logic/tribool.hpp>
-#include <boost/shared_ptr.hpp>
+#include <memory>
 #include <string>
 #include <vector>
 

src/ifcparse/express.h

@@ -26,7 +26,7 @@
 #include "utils.h"
 
 #include <atomic>
-#include <boost/shared_ptr.hpp>
+#include <memory>
 
 class aggregate_of_instance;
 

src/ifcparse/file.h

@@ -390,7 +390,7 @@ public:
     ///
     /// Attention when running remove_entity inside a loop over a list of entities to be removed.
     /// This invalidates the iterator. A workaround is to reverse the loop:
-    /// boost::shared_ptr<aggregate_of_instance> entities = ...;
+    /// std::shared_ptr<aggregate_of_instance> entities = ...;
     /// for (auto it = entities->end() - 1; it >= entities->begin(); --it) {
     ///    ifcopenshell::IfcBaseClass *const inst = *it;
     ///    model->remove_entity(inst);

src/ifcparse/instance_data.h

@@ -41,7 +41,7 @@
 #include <cstring>
 
 #include <boost/optional.hpp>
-#include <boost/shared_ptr.hpp>
+#include <memory>
 #include <boost/logic/tribool.hpp>
 #include <boost/dynamic_bitset.hpp>
 

src/ifcparse/parse.cpp

@@ -2750,7 +2750,7 @@ void file::remove_entity(const express::base& entity) {
 
     // Attention when running remove_entity inside a loop over a list of entities to be removed.
     // This invalidates the iterator. A workaround is to reverse the loop:
-    // boost::shared_ptr<aggregate_of_instance> entities = ...;
+    // std::shared_ptr<aggregate_of_instance> entities = ...;
     // for (auto it = entities->end() - 1; it >= entities->begin(); --it) {
     //    express::base *const inst = *it;
     //    model->remove_entity(inst);

src/ifcparse/parse.h

@@ -36,7 +36,7 @@
 #include "storage.h"
 
 #include <boost/dynamic_bitset.hpp>
-#include <boost/shared_ptr.hpp>
+#include <memory>
 #include <cstring>
 #include <iostream>
 #include <string>