Move GHash/GSet/LinkList iterators to BLI files

Those are not depsgraph or C++ specific and can be used by everyone.

source/blender/blenlib/BLI_ghash.h

@@ -296,6 +296,25 @@ double BLI_ghash_calc_quality(GHash *gh);
 double BLI_gset_calc_quality(GSet *gs);
 #endif  /* GHASH_INTERNAL_API */
 
+#define GHASH_FOREACH_BEGIN(type, var, what) \
+	do { \
+		GHashIterator gh_iter##var; \
+		GHASH_ITER(gh_iter##var, what) { \
+			type var = (type)(BLI_ghashIterator_getValue(&gh_iter##var)); \
+
+#define GHASH_FOREACH_END() \
+		} \
+	} while(0)
+
+#define GSET_FOREACH_BEGIN(type, var, what) \
+	do { \
+		GSetIterator gh_iter##var; \
+		GSET_ITER(gh_iter##var, what) { \
+			type var = (type)(BLI_gsetIterator_getKey(&gh_iter##var));
+
+#define GSET_FOREACH_END() \
+		} \
+	} while(0)
 
 #ifdef __cplusplus
 }

source/blender/blenlib/BLI_listbase.h

@@ -125,6 +125,11 @@ if ((lb)->last && (lb_init || (lb_init = (lb)->last))) { \
 	         (lb_iter != lb_init)); \
 }
 
+#define LINKLIST_FOREACH(type, var, list)          \
+	for (type var = (type)((list)->first);     \
+	     var != NULL;                          \
+	     var = (type)(((Link*)(var))->next))
+
 #ifdef __cplusplus
 }
 #endif

source/blender/depsgraph/intern/depsgraph_tag.cc

@@ -43,6 +43,7 @@ extern "C" {
 #include "DNA_windowmanager_types.h"
 
 #include "BLI_task.h"
+#include "BLI_listbase.h"
 
 #include "BKE_idcode.h"
 #include "BKE_library.h"

source/blender/depsgraph/util/deg_util_foreach.h

@@ -46,28 +46,3 @@
 
 #  define foreach(x, y) for (x; false; (void)y)
 #endif
-
-#define GHASH_FOREACH_BEGIN(type, var, what) \
-	do { \
-		GHashIterator gh_iter##var; \
-		GHASH_ITER(gh_iter##var, what) { \
-			type var = reinterpret_cast<type>(BLI_ghashIterator_getValue(&gh_iter##var)); \
-
-#define GHASH_FOREACH_END() \
-		} \
-	} while(0)
-
-#define GSET_FOREACH_BEGIN(type, var, what) \
-	do { \
-		GSetIterator gh_iter##var; \
-		GSET_ITER(gh_iter##var, what) { \
-			type var = reinterpret_cast<type>(BLI_gsetIterator_getKey(&gh_iter##var)); \
-
-#define GSET_FOREACH_END() \
-		} \
-	} while(0)
-
-#define LINKLIST_FOREACH(type, var, list)          \
-	for (type var = (type)((list)->first);     \
-	     var != NULL;                          \
-	     var = (type)(((Link*)(var))->next))