Cleanup: take includes out of 'extern "C"' blocks

Surrounding includes with an 'extern "C"' block is not necessary anymore.
Also that made it harder to add any C++ code to some headers, or include headers
that have "optional" C++ code like `MEM_guardedalloc.h`.

I tested compilation on linux and windows (and got help from @LazyDodo).
If this still breaks compilation due to some linker error, the header containing
the symbol in question is probably missing an 'extern "C"' block.

Differential Revision: https://developer.blender.org/D7653

5 files changed, 14 insertions, 14 deletions

diff --git a/source/blender/editors/include/ED_keyframes_edit.h b/source/blender/editors/include/ED_keyframes_edit.h
index 3ae864721e8..28bc0b22790 100644
--- a/source/blender/editors/include/ED_keyframes_edit.h
+++ b/source/blender/editors/include/ED_keyframes_edit.h
@@ -24,12 +24,12 @@
 #ifndef __ED_KEYFRAMES_EDIT_H__
 #define __ED_KEYFRAMES_EDIT_H__
 
+#include "ED_anim_api.h" /* for enum eAnimFilter_Flags */
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-#include "ED_anim_api.h" /* for enum eAnimFilter_Flags */
-
 struct BezTriple;
 struct FCurve;
 struct Scene;
diff --git a/source/blender/editors/include/ED_keyframing.h b/source/blender/editors/include/ED_keyframing.h
index 4225ecc6f3d..5635ef2800a 100644
--- a/source/blender/editors/include/ED_keyframing.h
+++ b/source/blender/editors/include/ED_keyframing.h
@@ -24,6 +24,9 @@
 #ifndef __ED_KEYFRAMING_H__
 #define __ED_KEYFRAMING_H__
 
+#include "DNA_anim_types.h"
+#include "RNA_types.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -50,9 +53,6 @@ struct PropertyRNA;
 
 struct NlaKeyframingContext;
 
-#include "DNA_anim_types.h"
-#include "RNA_types.h"
-
 /* ************ Keyframing Management **************** */
 
 /* Get the active settings for keyframing settings from context (specifically the given scene)
diff --git a/source/blender/editors/include/ED_object.h b/source/blender/editors/include/ED_object.h
index 9d25fff477d..32e62a6436c 100644
--- a/source/blender/editors/include/ED_object.h
+++ b/source/blender/editors/include/ED_object.h
@@ -24,6 +24,9 @@
 #ifndef __ED_OBJECT_H__
 #define __ED_OBJECT_H__
 
+#include "BLI_compiler_attrs.h"
+#include "DNA_object_enums.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -54,9 +57,6 @@ struct wmOperator;
 struct wmOperatorType;
 struct wmWindowManager;
 
-#include "BLI_compiler_attrs.h"
-#include "DNA_object_enums.h"
-
 /* object_edit.c */
 /* context.object */
 struct Object *ED_object_context(struct bContext *C);
diff --git a/source/blender/editors/include/UI_resources.h b/source/blender/editors/include/UI_resources.h
index b0995250979..c5c4ca79f14 100644
--- a/source/blender/editors/include/UI_resources.h
+++ b/source/blender/editors/include/UI_resources.h
@@ -26,10 +26,6 @@
 
 #include "BLI_sys_types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 /* Define icon enum. */
 #define DEF_ICON(name) ICON_##name,
 #define DEF_ICON_VECTOR(name) ICON_##name,
@@ -47,6 +43,10 @@ typedef enum {
 /* use to denote intentionally unset theme color */
 #define TH_UNDEFINED -1
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef enum ThemeColorID {
   TH_REDALERT,
 
diff --git a/source/blender/editors/uvedit/uvedit_parametrizer.h b/source/blender/editors/uvedit/uvedit_parametrizer.h
index 2b80241e6e3..53188ea42bb 100644
--- a/source/blender/editors/uvedit/uvedit_parametrizer.h
+++ b/source/blender/editors/uvedit/uvedit_parametrizer.h
@@ -21,12 +21,12 @@
  * \ingroup eduv
  */
 
+#include "BLI_sys_types.h"  // for intptr_t support
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-#include "BLI_sys_types.h"  // for intptr_t support
-
 typedef void ParamHandle;  /* handle to a set of charts */
 typedef intptr_t ParamKey; /* (hash) key for identifying verts and faces */
 typedef enum ParamBool {