[gtkmm/gtkmm-3-24] treemodelcolumn.h: Export class selectively

[Chun-wei Fan <fanchunwei src gnome org>]

commit 47bab3e1b22944688e369e0ead3da98ea07ce9b7
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Tue May 11 18:03:12 2021 +0800

    treemodelcolumn.h: Export class selectively
    
    This class contains a std::vector<GType> member, so don't export this class as
    a whole but export its methods individually.
    
    This will eliminate warning C4251 and avoid having the built code depend on a
    specific STL and compiler version

 gtk/gtkmm/treemodelcolumn.h | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)
---
diff --git a/gtk/gtkmm/treemodelcolumn.h b/gtk/gtkmm/treemodelcolumn.h
index 956aa0af..78d8c409 100644
--- a/gtk/gtkmm/treemodelcolumn.h
+++ b/gtk/gtkmm/treemodelcolumn.h
@@ -67,28 +67,28 @@ class GTKMM_API TreeModelColumnBase;
  * sure it's instantiated after Gtk::Main), even when creating multiple models
  * from it.
  */
-class GTKMM_API TreeModelColumnRecord
+class TreeModelColumnRecord
 {
 public:
-  TreeModelColumnRecord();
-  virtual ~TreeModelColumnRecord() noexcept;
+  GTKMM_API TreeModelColumnRecord();
+  GTKMM_API virtual ~TreeModelColumnRecord() noexcept;
 
   /** Adds a TreeModelColumn to this record.
    * add() not only registers the @a column, but also assigns a column
    * index to it.  Once registered, the TreeModelColumn is final, and
    * you're free to pass it around by value.
    */
-  void add(TreeModelColumnBase& column);
+  GTKMM_API void add(TreeModelColumnBase& column);
 
-  unsigned int size()  const;
-  const GType* types() const;
+  GTKMM_API unsigned int size()  const;
+  GTKMM_API const GType* types() const;
 
 private:
   std::vector<GType> column_types_;
 
   // noncopyable
-  TreeModelColumnRecord(const TreeModelColumnRecord&);
-  TreeModelColumnRecord& operator=(const TreeModelColumnRecord&);
+  GTKMM_API TreeModelColumnRecord(const TreeModelColumnRecord&);
+  GTKMM_API TreeModelColumnRecord& operator=(const TreeModelColumnRecord&);
 };