Code Style: use "#pragma once" in source directory

This replaces header include guards with `#pragma once`.
A couple of include guards are not removed yet (e.g. `__RNA_TYPES_H__`),
because they are used in other places.

This patch has been generated by P1561 followed by `make format`.

Differential Revision: https://developer.blender.org/D8466

73 files changed, 73 insertions, 292 deletions

diff --git a/source/blender/python/BPY_extern.h b/source/blender/python/BPY_extern.h
index 42472dda42c..da9b5d642ef 100644
--- a/source/blender/python/BPY_extern.h
+++ b/source/blender/python/BPY_extern.h
@@ -18,8 +18,7 @@
  * \ingroup python
  */
 
-#ifndef __BPY_EXTERN_H__
-#define __BPY_EXTERN_H__
+#pragma once
 
 struct AnimationEvalContext;
 struct ChannelDriver; /* DNA_anim_types.h */
@@ -141,5 +140,3 @@ const char *BPY_app_translations_py_pgettext(const char *msgctxt, const char *ms
 #ifdef __cplusplus
 } /* extern "C" */
 #endif
-
-#endif /* __BPY_EXTERN_H__ */
diff --git a/source/blender/python/BPY_extern_clog.h b/source/blender/python/BPY_extern_clog.h
index d610dc1c7ba..14b57b4cc5c 100644
--- a/source/blender/python/BPY_extern_clog.h
+++ b/source/blender/python/BPY_extern_clog.h
@@ -20,11 +20,8 @@
  * Logging defines.
  */
 
-#ifndef __BPY_EXTERN_CLOG_H__
-#define __BPY_EXTERN_CLOG_H__
+#pragma once
 
 /* bpy_interface.c */
 extern struct CLG_LogRef *BPY_LOG_RNA;
 extern struct CLG_LogRef *BPY_LOG_CONTEXT;
-
-#endif /* __BPY_EXTERN_CLOG_H__ */
diff --git a/source/blender/python/bmesh/bmesh_py_api.h b/source/blender/python/bmesh/bmesh_py_api.h
index 9f227b21440..357f416f266 100644
--- a/source/blender/python/bmesh/bmesh_py_api.h
+++ b/source/blender/python/bmesh/bmesh_py_api.h
@@ -21,9 +21,6 @@
  * \ingroup pybmesh
  */
 
-#ifndef __BMESH_PY_API_H__
-#define __BMESH_PY_API_H__
+#pragma once
 
 PyObject *BPyInit_bmesh(void);
-
-#endif /* __BMESH_PY_API_H__ */
diff --git a/source/blender/python/bmesh/bmesh_py_geometry.h b/source/blender/python/bmesh/bmesh_py_geometry.h
index 98d336828dc..dcb8c59f68b 100644
--- a/source/blender/python/bmesh/bmesh_py_geometry.h
+++ b/source/blender/python/bmesh/bmesh_py_geometry.h
@@ -21,9 +21,6 @@
  * \ingroup pybmesh
  */
 
-#ifndef __BMESH_PY_GEOMETRY_H__
-#define __BMESH_PY_GEOMETRY_H__
+#pragma once
 
 PyObject *BPyInit_bmesh_geometry(void);
-
-#endif /* __BMESH_PY_GEOMETRY_H__ */
diff --git a/source/blender/python/bmesh/bmesh_py_ops.h b/source/blender/python/bmesh/bmesh_py_ops.h
index a4a12bbef61..442af51fd17 100644
--- a/source/blender/python/bmesh/bmesh_py_ops.h
+++ b/source/blender/python/bmesh/bmesh_py_ops.h
@@ -21,9 +21,6 @@
  * \ingroup pybmesh
  */
 
-#ifndef __BMESH_PY_OPS_H__
-#define __BMESH_PY_OPS_H__
+#pragma once
 
 PyObject *BPyInit_bmesh_ops(void);
-
-#endif /* __BMESH_PY_OPS_H__ */
diff --git a/source/blender/python/bmesh/bmesh_py_ops_call.h b/source/blender/python/bmesh/bmesh_py_ops_call.h
index 7b6611cd61d..6d9ceec73f6 100644
--- a/source/blender/python/bmesh/bmesh_py_ops_call.h
+++ b/source/blender/python/bmesh/bmesh_py_ops_call.h
@@ -21,8 +21,7 @@
  * \ingroup pybmesh
  */
 
-#ifndef __BMESH_PY_OPS_CALL_H__
-#define __BMESH_PY_OPS_CALL_H__
+#pragma once
 
 typedef struct {
   PyObject_HEAD /* required python macro   */
@@ -30,5 +29,3 @@ typedef struct {
 } BPy_BMeshOpFunc;
 
 PyObject *BPy_BMO_call(BPy_BMeshOpFunc *self, PyObject *args, PyObject *kw);
-
-#endif /* __BMESH_PY_OPS_CALL_H__ */
diff --git a/source/blender/python/bmesh/bmesh_py_types.h b/source/blender/python/bmesh/bmesh_py_types.h
index 74bfbcec3c7..7ac3c4bf3cc 100644
--- a/source/blender/python/bmesh/bmesh_py_types.h
+++ b/source/blender/python/bmesh/bmesh_py_types.h
@@ -21,8 +21,7 @@
  * \ingroup pybmesh
  */
 
-#ifndef __BMESH_PY_TYPES_H__
-#define __BMESH_PY_TYPES_H__
+#pragma once
 
 extern PyTypeObject BPy_BMesh_Type;
 extern PyTypeObject BPy_BMVert_Type;
@@ -228,5 +227,3 @@ extern struct PyC_FlagSet bpy_bm_htype_vert_edge_face_flags[];
 extern struct PyC_FlagSet bpy_bm_htype_all_flags[];
 extern struct PyC_FlagSet bpy_bm_hflag_all_flags[];
 #endif
-
-#endif /* __BMESH_PY_TYPES_H__ */
diff --git a/source/blender/python/bmesh/bmesh_py_types_customdata.h b/source/blender/python/bmesh/bmesh_py_types_customdata.h
index 95836707e3d..3173813a912 100644
--- a/source/blender/python/bmesh/bmesh_py_types_customdata.h
+++ b/source/blender/python/bmesh/bmesh_py_types_customdata.h
@@ -21,8 +21,7 @@
  * \ingroup pybmesh
  */
 
-#ifndef __BMESH_PY_TYPES_CUSTOMDATA_H__
-#define __BMESH_PY_TYPES_CUSTOMDATA_H__
+#pragma once
 
 /* all use BPy_BMLayerAccess struct */
 extern PyTypeObject BPy_BMLayerAccessVert_Type;
@@ -67,5 +66,3 @@ void BPy_BM_init_types_customdata(void);
 /* __getitem__ / __setitem__ */
 PyObject *BPy_BMLayerItem_GetItem(BPy_BMElem *py_ele, BPy_BMLayerItem *py_layer);
 int BPy_BMLayerItem_SetItem(BPy_BMElem *py_ele, BPy_BMLayerItem *py_layer, PyObject *value);
-
-#endif /* __BMESH_PY_TYPES_CUSTOMDATA_H__ */
diff --git a/source/blender/python/bmesh/bmesh_py_types_meshdata.h b/source/blender/python/bmesh/bmesh_py_types_meshdata.h
index 5211c30ec7e..58f31a9807e 100644
--- a/source/blender/python/bmesh/bmesh_py_types_meshdata.h
+++ b/source/blender/python/bmesh/bmesh_py_types_meshdata.h
@@ -21,8 +21,7 @@
  * \ingroup pybmesh
  */
 
-#ifndef __BMESH_PY_TYPES_MESHDATA_H__
-#define __BMESH_PY_TYPES_MESHDATA_H__
+#pragma once
 
 extern PyTypeObject BPy_BMLoopUV_Type;
 extern PyTypeObject BPy_BMDeformVert_Type;
@@ -51,5 +50,3 @@ int BPy_BMDeformVert_AssignPyObject(struct MDeformVert *dvert, PyObject *value);
 PyObject *BPy_BMDeformVert_CreatePyObject(struct MDeformVert *dvert);
 
 void BPy_BM_init_types_meshdata(void);
-
-#endif /* __BMESH_PY_TYPES_MESHDATA_H__ */
diff --git a/source/blender/python/bmesh/bmesh_py_types_select.h b/source/blender/python/bmesh/bmesh_py_types_select.h
index 593857a5083..c33aa3675c5 100644
--- a/source/blender/python/bmesh/bmesh_py_types_select.h
+++ b/source/blender/python/bmesh/bmesh_py_types_select.h
@@ -21,8 +21,7 @@
  * \ingroup pybmesh
  */
 
-#ifndef __BMESH_PY_TYPES_SELECT_H__
-#define __BMESH_PY_TYPES_SELECT_H__
+#pragma once
 
 struct BPy_BMesh;
 
@@ -46,5 +45,3 @@ void BPy_BM_init_types_select(void);
 PyObject *BPy_BMEditSel_CreatePyObject(BMesh *bm);
 PyObject *BPy_BMEditSelIter_CreatePyObject(BMesh *bm);
 int BPy_BMEditSel_Assign(struct BPy_BMesh *self, PyObject *value);
-
-#endif /* __BMESH_PY_SELECT_H__ */
diff --git a/source/blender/python/bmesh/bmesh_py_utils.h b/source/blender/python/bmesh/bmesh_py_utils.h
index a6f4f22bf8b..27eccca4535 100644
--- a/source/blender/python/bmesh/bmesh_py_utils.h
+++ b/source/blender/python/bmesh/bmesh_py_utils.h
@@ -21,9 +21,6 @@
  * \ingroup pybmesh
  */
 
-#ifndef __BMESH_PY_UTILS_H__
-#define __BMESH_PY_UTILS_H__
+#pragma once
 
 PyObject *BPyInit_bmesh_utils(void);
-
-#endif /* __BMESH_PY_UTILS_H__ */
diff --git a/source/blender/python/generic/bgl.h b/source/blender/python/generic/bgl.h
index 8c81dc48340..ee8c293945a 100644
--- a/source/blender/python/generic/bgl.h
+++ b/source/blender/python/generic/bgl.h
@@ -18,8 +18,7 @@
  * \ingroup pygen
  */
 
-#ifndef __BGL_H__
-#define __BGL_H__
+#pragma once
 
 PyObject *BPyInit_bgl(void);
 
@@ -52,5 +51,3 @@ typedef struct _Buffer {
 
 /** The type object */
 extern PyTypeObject BGL_bufferType;
-
-#endif /* __BGL_H__ */
diff --git a/source/blender/python/generic/bl_math_py_api.h b/source/blender/python/generic/bl_math_py_api.h
index 9183573abfc..484304948f3 100644
--- a/source/blender/python/generic/bl_math_py_api.h
+++ b/source/blender/python/generic/bl_math_py_api.h
@@ -19,9 +19,6 @@
  * \ingroup pygen
  */
 
-#ifndef __BL_MATH_PY_API_H__
-#define __BL_MATH_PY_API_H__
+#pragma once
 
 PyMODINIT_FUNC BPyInit_bl_math(void);
-
-#endif /* __BL_MATH_PY_API_H__ */
diff --git a/source/blender/python/generic/blf_py_api.h b/source/blender/python/generic/blf_py_api.h
index 919272df942..c47edd1eaab 100644
--- a/source/blender/python/generic/blf_py_api.h
+++ b/source/blender/python/generic/blf_py_api.h
@@ -14,8 +14,7 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
-#ifndef __BLF_PY_API_H__
-#define __BLF_PY_API_H__
+#pragma once
 
 /** \file
  * \ingroup pygen
@@ -24,5 +23,3 @@
 #include <Python.h>
 
 PyObject *BPyInit_blf(void);
-
-#endif /* __BLF_PY_API_H__ */
diff --git a/source/blender/python/generic/idprop_py_api.h b/source/blender/python/generic/idprop_py_api.h
index 49094f95ecb..478dc99f73d 100644
--- a/source/blender/python/generic/idprop_py_api.h
+++ b/source/blender/python/generic/idprop_py_api.h
@@ -18,8 +18,7 @@
  * \ingroup pygen
  */
 
-#ifndef __IDPROP_PY_API_H__
-#define __IDPROP_PY_API_H__
+#pragma once
 
 struct BPy_IDGroup_Iter;
 struct ID;
@@ -68,5 +67,3 @@ PyObject *BPyInit_idprop(void);
 
 #define IDPROP_ITER_KEYS 0
 #define IDPROP_ITER_ITEMS 1
-
-#endif /* __IDPROP_PY_API_H__ */
diff --git a/source/blender/python/generic/imbuf_py_api.h b/source/blender/python/generic/imbuf_py_api.h
index 2dea925a9f2..897423415b3 100644
--- a/source/blender/python/generic/imbuf_py_api.h
+++ b/source/blender/python/generic/imbuf_py_api.h
@@ -14,8 +14,7 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
-#ifndef __IMBUF_PY_API_H__
-#define __IMBUF_PY_API_H__
+#pragma once
 
 /** \file
  * \ingroup pygen
@@ -24,5 +23,3 @@
 PyObject *BPyInit_imbuf(void);
 
 extern PyTypeObject Py_ImBuf_Type;
-
-#endif /* __IMBUF_PY_API_H__ */
diff --git a/source/blender/python/generic/python_utildefines.h b/source/blender/python/generic/python_utildefines.h
index 653122c9c33..1f093e633e4 100644
--- a/source/blender/python/generic/python_utildefines.h
+++ b/source/blender/python/generic/python_utildefines.h
@@ -20,8 +20,7 @@
  * \note light addition to Python.h, use py_capi_utils.h for larger features.
  */
 
-#ifndef __PYTHON_UTILDEFINES_H__
-#define __PYTHON_UTILDEFINES_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -57,5 +56,3 @@ Py_LOCAL_INLINE(int) PyList_APPEND(PyObject *op, PyObject *v)
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __PYTHON_UTILDEFINES_H__ */
diff --git a/source/blender/python/gpu/gpu_py_api.h b/source/blender/python/gpu/gpu_py_api.h
index e278bb63a49..2360bba1f5d 100644
--- a/source/blender/python/gpu/gpu_py_api.h
+++ b/source/blender/python/gpu/gpu_py_api.h
@@ -18,8 +18,7 @@
  * \ingroup bpygpu
  */
 
-#ifndef __GPU_PY_API_H__
-#define __GPU_PY_API_H__
+#pragma once
 
 int bpygpu_ParsePrimType(PyObject *o, void *p);
 
@@ -36,5 +35,3 @@ bool bpygpu_is_initialized_or_error(void);
     return -1; \
   } \
   ((void)0)
-
-#endif /* __GPU_PY_API_H__ */
diff --git a/source/blender/python/gpu/gpu_py_batch.h b/source/blender/python/gpu/gpu_py_batch.h
index 1e916afcc2e..7c882eab8fc 100644
--- a/source/blender/python/gpu/gpu_py_batch.h
+++ b/source/blender/python/gpu/gpu_py_batch.h
@@ -18,8 +18,7 @@
  * \ingroup bpygpu
  */
 
-#ifndef __GPU_PY_BATCH_H__
-#define __GPU_PY_BATCH_H__
+#pragma once
 
 #include "BLI_compiler_attrs.h"
 
@@ -40,5 +39,3 @@ typedef struct BPyGPUBatch {
 } BPyGPUBatch;
 
 PyObject *BPyGPUBatch_CreatePyObject(struct GPUBatch *batch) ATTR_NONNULL(1);
-
-#endif /* __GPU_PY_BATCH_H__ */
diff --git a/source/blender/python/gpu/gpu_py_element.h b/source/blender/python/gpu/gpu_py_element.h
index 055c9d54ecf..a8e22aae15a 100644
--- a/source/blender/python/gpu/gpu_py_element.h
+++ b/source/blender/python/gpu/gpu_py_element.h
@@ -18,8 +18,7 @@
  * \ingroup bpygpu
  */
 
-#ifndef __GPU_PY_ELEMENT_H__
-#define __GPU_PY_ELEMENT_H__
+#pragma once
 
 extern PyTypeObject BPyGPUIndexBuf_Type;
 
@@ -30,5 +29,3 @@ typedef struct BPyGPUIndexBuf {
 } BPyGPUIndexBuf;
 
 PyObject *BPyGPUIndexBuf_CreatePyObject(struct GPUIndexBuf *elem);
-
-#endif /* __GPU_PY_ELEMENT_H__ */
diff --git a/source/blender/python/gpu/gpu_py_matrix.h b/source/blender/python/gpu/gpu_py_matrix.h
index cf187dee002..38a7f398b30 100644
--- a/source/blender/python/gpu/gpu_py_matrix.h
+++ b/source/blender/python/gpu/gpu_py_matrix.h
@@ -18,9 +18,6 @@
  * \ingroup bpygpu
  */
 
-#ifndef __GPU_PY_MATRIX_H__
-#define __GPU_PY_MATRIX_H__
+#pragma once
 
 PyObject *BPyInit_gpu_matrix(void);
-
-#endif /* __GPU_PY_MATRIX_H__ */
diff --git a/source/blender/python/gpu/gpu_py_offscreen.h b/source/blender/python/gpu/gpu_py_offscreen.h
index 61d7bd82abc..efe5b57b22e 100644
--- a/source/blender/python/gpu/gpu_py_offscreen.h
+++ b/source/blender/python/gpu/gpu_py_offscreen.h
@@ -18,8 +18,7 @@
  * \ingroup bpygpu
  */
 
-#ifndef __GPU_PY_OFFSCREEN_H__
-#define __GPU_PY_OFFSCREEN_H__
+#pragma once
 
 #include "BLI_compiler_attrs.h"
 
@@ -33,5 +32,3 @@ typedef struct BPyGPUOffScreen {
 } BPyGPUOffScreen;
 
 PyObject *BPyGPUOffScreen_CreatePyObject(struct GPUOffScreen *ofs) ATTR_NONNULL(1);
-
-#endif /* __GPU_PY_OFFSCREEN_H__ */
diff --git a/source/blender/python/gpu/gpu_py_select.h b/source/blender/python/gpu/gpu_py_select.h
index 814b6028da1..857cd7bb7f8 100644
--- a/source/blender/python/gpu/gpu_py_select.h
+++ b/source/blender/python/gpu/gpu_py_select.h
@@ -18,9 +18,6 @@
  * \ingroup bpygpu
  */
 
-#ifndef __GPU_PY_SELECT_H__
-#define __GPU_PY_SELECT_H__
+#pragma once
 
 PyObject *BPyInit_gpu_select(void);
-
-#endif /* __GPU_PY_SELECT_H__ */
diff --git a/source/blender/python/gpu/gpu_py_shader.h b/source/blender/python/gpu/gpu_py_shader.h
index 92873753039..ee26c26acd4 100644
--- a/source/blender/python/gpu/gpu_py_shader.h
+++ b/source/blender/python/gpu/gpu_py_shader.h
@@ -18,8 +18,7 @@
  * \ingroup bpygpu
  */
 
-#ifndef __GPU_PY_SHADER_H__
-#define __GPU_PY_SHADER_H__
+#pragma once
 
 extern PyTypeObject BPyGPUShader_Type;
 
@@ -32,5 +31,3 @@ typedef struct BPyGPUShader {
 
 PyObject *BPyGPUShader_CreatePyObject(struct GPUShader *shader, bool is_builtin);
 PyObject *BPyInit_gpu_shader(void);
-
-#endif /* __GPU_PY_SHADER_H__ */
diff --git a/source/blender/python/gpu/gpu_py_types.h b/source/blender/python/gpu/gpu_py_types.h
index d8048225604..56f73b8a504 100644
--- a/source/blender/python/gpu/gpu_py_types.h
+++ b/source/blender/python/gpu/gpu_py_types.h
@@ -18,8 +18,7 @@
  * \ingroup bpygpu
  */
 
-#ifndef __GPU_PY_TYPES_H__
-#define __GPU_PY_TYPES_H__
+#pragma once
 
 #include "gpu_py_batch.h"
 #include "gpu_py_element.h"
@@ -29,5 +28,3 @@
 #include "gpu_py_vertex_format.h"
 
 PyObject *BPyInit_gpu_types(void);
-
-#endif /* __GPU_PY_TYPES_H__ */
diff --git a/source/blender/python/gpu/gpu_py_vertex_buffer.h b/source/blender/python/gpu/gpu_py_vertex_buffer.h
index b7124d245a9..41791a35e6e 100644
--- a/source/blender/python/gpu/gpu_py_vertex_buffer.h
+++ b/source/blender/python/gpu/gpu_py_vertex_buffer.h
@@ -18,8 +18,7 @@
  * \ingroup bpygpu
  */
 
-#ifndef __GPU_PY_VERTEX_BUFFER_H__
-#define __GPU_PY_VERTEX_BUFFER_H__
+#pragma once
 
 #include "BLI_compiler_attrs.h"
 
@@ -34,5 +33,3 @@ typedef struct BPyGPUVertBuf {
 } BPyGPUVertBuf;
 
 PyObject *BPyGPUVertBuf_CreatePyObject(struct GPUVertBuf *vbo) ATTR_NONNULL(1);
-
-#endif /* __GPU_PY_VERTEX_BUFFER_H__ */
diff --git a/source/blender/python/gpu/gpu_py_vertex_format.h b/source/blender/python/gpu/gpu_py_vertex_format.h
index 8ef466aa918..54d090e2923 100644
--- a/source/blender/python/gpu/gpu_py_vertex_format.h
+++ b/source/blender/python/gpu/gpu_py_vertex_format.h
@@ -18,8 +18,7 @@
  * \ingroup bpygpu
  */
 
-#ifndef __GPU_PY_VERTEX_FORMAT_H__
-#define __GPU_PY_VERTEX_FORMAT_H__
+#pragma once
 
 #include "GPU_vertex_format.h"
 
@@ -32,5 +31,3 @@ typedef struct BPyGPUVertFormat {
 } BPyGPUVertFormat;
 
 PyObject *BPyGPUVertFormat_CreatePyObject(struct GPUVertFormat *fmt);
-
-#endif /* __GPU_PY_VERTEX_FORMAT_H__ */
diff --git a/source/blender/python/intern/bpy.h b/source/blender/python/intern/bpy.h
index 8f91c4e1208..744bf903443 100644
--- a/source/blender/python/intern/bpy.h
+++ b/source/blender/python/intern/bpy.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_H__
-#define __BPY_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -38,5 +37,3 @@ extern struct CLG_LogRef *BPY_LOG_RNA;
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_H__ */
diff --git a/source/blender/python/intern/bpy_app.h b/source/blender/python/intern/bpy_app.h
index 880686f3536..0e5b6747543 100644
--- a/source/blender/python/intern/bpy_app.h
+++ b/source/blender/python/intern/bpy_app.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_APP_H__
-#define __BPY_APP_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ PyObject *BPY_app_struct(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_APP_H__ */
diff --git a/source/blender/python/intern/bpy_app_alembic.h b/source/blender/python/intern/bpy_app_alembic.h
index fcd93fb2b13..4288b556172 100644
--- a/source/blender/python/intern/bpy_app_alembic.h
+++ b/source/blender/python/intern/bpy_app_alembic.h
@@ -21,8 +21,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_APP_ALEMBIC_H__
-#define __BPY_APP_ALEMBIC_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -33,5 +32,3 @@ PyObject *BPY_app_alembic_struct(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_APP_ALEMBIC_H__ */
diff --git a/source/blender/python/intern/bpy_app_build_options.h b/source/blender/python/intern/bpy_app_build_options.h
index a10f42d53be..390e3409fb8 100644
--- a/source/blender/python/intern/bpy_app_build_options.h
+++ b/source/blender/python/intern/bpy_app_build_options.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_APP_BUILD_OPTIONS_H__
-#define __BPY_APP_BUILD_OPTIONS_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ PyObject *BPY_app_build_options_struct(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_APP_BUILD_OPTIONS_H__ */
diff --git a/source/blender/python/intern/bpy_app_ffmpeg.h b/source/blender/python/intern/bpy_app_ffmpeg.h
index 4809288662b..b189592e03e 100644
--- a/source/blender/python/intern/bpy_app_ffmpeg.h
+++ b/source/blender/python/intern/bpy_app_ffmpeg.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_APP_FFMPEG_H__
-#define __BPY_APP_FFMPEG_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ PyObject *BPY_app_ffmpeg_struct(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_APP_FFMPEG_H__ */
diff --git a/source/blender/python/intern/bpy_app_handlers.h b/source/blender/python/intern/bpy_app_handlers.h
index 9c9dd75dd18..eb8e85fc96e 100644
--- a/source/blender/python/intern/bpy_app_handlers.h
+++ b/source/blender/python/intern/bpy_app_handlers.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_APP_HANDLERS_H__
-#define __BPY_APP_HANDLERS_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ PyObject *BPY_app_handlers_struct(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_APP_HANDLERS_H__ */
diff --git a/source/blender/python/intern/bpy_app_icons.h b/source/blender/python/intern/bpy_app_icons.h
index 2904dc06136..b0dcbe4b0ea 100644
--- a/source/blender/python/intern/bpy_app_icons.h
+++ b/source/blender/python/intern/bpy_app_icons.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_APP_ICONS_H__
-#define __BPY_APP_ICONS_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ PyObject *BPY_app_icons_module(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_APP_ICONS_H__ */
diff --git a/source/blender/python/intern/bpy_app_ocio.h b/source/blender/python/intern/bpy_app_ocio.h
index 145cea1a9be..bc4529a962c 100644
--- a/source/blender/python/intern/bpy_app_ocio.h
+++ b/source/blender/python/intern/bpy_app_ocio.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_APP_OCIO_H__
-#define __BPY_APP_OCIO_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ PyObject *BPY_app_ocio_struct(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_APP_OCIO_H__ */
diff --git a/source/blender/python/intern/bpy_app_oiio.h b/source/blender/python/intern/bpy_app_oiio.h
index e106a9a055a..47092899eec 100644
--- a/source/blender/python/intern/bpy_app_oiio.h
+++ b/source/blender/python/intern/bpy_app_oiio.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_APP_OIIO_H__
-#define __BPY_APP_OIIO_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ PyObject *BPY_app_oiio_struct(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_APP_OIIO_H__ */
diff --git a/source/blender/python/intern/bpy_app_opensubdiv.h b/source/blender/python/intern/bpy_app_opensubdiv.h
index f659e58c071..e18c827e6d8 100644
--- a/source/blender/python/intern/bpy_app_opensubdiv.h
+++ b/source/blender/python/intern/bpy_app_opensubdiv.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_APP_OPENSUBDIV_H__
-#define __BPY_APP_OPENSUBDIV_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ PyObject *BPY_app_opensubdiv_struct(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_APP_OPENSUBDIV_H__ */
diff --git a/source/blender/python/intern/bpy_app_openvdb.h b/source/blender/python/intern/bpy_app_openvdb.h
index 60c2bbaa922..ab73d561412 100644
--- a/source/blender/python/intern/bpy_app_openvdb.h
+++ b/source/blender/python/intern/bpy_app_openvdb.h
@@ -21,8 +21,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_APP_OPENVDB_H__
-#define __BPY_APP_OPENVDB_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -33,5 +32,3 @@ PyObject *BPY_app_openvdb_struct(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_APP_OPENVDB_H__ */
diff --git a/source/blender/python/intern/bpy_app_sdl.h b/source/blender/python/intern/bpy_app_sdl.h
index dd21ece89c7..b1d349c2a59 100644
--- a/source/blender/python/intern/bpy_app_sdl.h
+++ b/source/blender/python/intern/bpy_app_sdl.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_APP_SDL_H__
-#define __BPY_APP_SDL_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ PyObject *BPY_app_sdl_struct(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_APP_SDL_H__ */
diff --git a/source/blender/python/intern/bpy_app_timers.h b/source/blender/python/intern/bpy_app_timers.h
index 6da92eb8b31..9e62541c83a 100644
--- a/source/blender/python/intern/bpy_app_timers.h
+++ b/source/blender/python/intern/bpy_app_timers.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_APP_TIMERS_H__
-#define __BPY_APP_TIMERS_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ PyObject *BPY_app_timers_module(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_APP_TIMERS_H__ */
diff --git a/source/blender/python/intern/bpy_app_translations.h b/source/blender/python/intern/bpy_app_translations.h
index 1e98c7d9aaa..090cab5917c 100644
--- a/source/blender/python/intern/bpy_app_translations.h
+++ b/source/blender/python/intern/bpy_app_translations.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_APP_TRANSLATIONS_H__
-#define __BPY_APP_TRANSLATIONS_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -31,5 +30,3 @@ void BPY_app_translations_end(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_APP_TRANSLATIONS_H__ */
diff --git a/source/blender/python/intern/bpy_app_usd.h b/source/blender/python/intern/bpy_app_usd.h
index 0482b10974d..2801408c2aa 100644
--- a/source/blender/python/intern/bpy_app_usd.h
+++ b/source/blender/python/intern/bpy_app_usd.h
@@ -21,8 +21,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_APP_USD_H__
-#define __BPY_APP_USD_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -33,5 +32,3 @@ PyObject *BPY_app_usd_struct(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_APP_USD_H__ */
diff --git a/source/blender/python/intern/bpy_capi_utils.h b/source/blender/python/intern/bpy_capi_utils.h
index 46206f134ba..c021ec14933 100644
--- a/source/blender/python/intern/bpy_capi_utils.h
+++ b/source/blender/python/intern/bpy_capi_utils.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_CAPI_UTILS_H__
-#define __BPY_CAPI_UTILS_H__
+#pragma once
 
 #if PY_VERSION_HEX < 0x03070000
 #  error "Python 3.7 or greater is required, you'll need to update your Python."
@@ -57,5 +56,3 @@ extern void bpy_context_clear(struct bContext *C, const PyGILState_STATE *gilsta
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_CAPI_UTILS_H__ */
diff --git a/source/blender/python/intern/bpy_driver.h b/source/blender/python/intern/bpy_driver.h
index 84f3cbdbbb3..d5064d9fa56 100644
--- a/source/blender/python/intern/bpy_driver.h
+++ b/source/blender/python/intern/bpy_driver.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_DRIVER_H__
-#define __BPY_DRIVER_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -31,5 +30,3 @@ extern PyObject *bpy_pydriver_Dict;
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_DRIVER_H__ */
diff --git a/source/blender/python/intern/bpy_gizmo_wrap.h b/source/blender/python/intern/bpy_gizmo_wrap.h
index 3a46dd5d78b..86b56ab2bd9 100644
--- a/source/blender/python/intern/bpy_gizmo_wrap.h
+++ b/source/blender/python/intern/bpy_gizmo_wrap.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_GIZMO_WRAP_H__
-#define __BPY_GIZMO_WRAP_H__
+#pragma once
 
 struct wmGizmoGroupType;
 struct wmGizmoType;
@@ -35,5 +34,3 @@ void BPY_RNA_gizmogroup_wrapper(struct wmGizmoGroupType *gzgt, void *userdata);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_GIZMO_WRAP_H__ */
diff --git a/source/blender/python/intern/bpy_intern_string.h b/source/blender/python/intern/bpy_intern_string.h
index f87a43e6bf6..0c75b723fb8 100644
--- a/source/blender/python/intern/bpy_intern_string.h
+++ b/source/blender/python/intern/bpy_intern_string.h
@@ -14,8 +14,7 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
-#ifndef __BPY_INTERN_STRING_H__
-#define __BPY_INTERN_STRING_H__
+#pragma once
 
 /** \file
  * \ingroup pythonintern
@@ -48,5 +47,3 @@ extern PyObject *bpy_intern_str_unregister;
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_INTERN_STRING_H__ */
diff --git a/source/blender/python/intern/bpy_library.h b/source/blender/python/intern/bpy_library.h
index aca4ae94d6e..fbcf111e37d 100644
--- a/source/blender/python/intern/bpy_library.h
+++ b/source/blender/python/intern/bpy_library.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_LIBRARY_H__
-#define __BPY_LIBRARY_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -33,5 +32,3 @@ extern PyMethodDef BPY_library_write_method_def;
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_LIBRARY_H__ */
diff --git a/source/blender/python/intern/bpy_msgbus.h b/source/blender/python/intern/bpy_msgbus.h
index 9a797218832..8d4846fd707 100644
--- a/source/blender/python/intern/bpy_msgbus.h
+++ b/source/blender/python/intern/bpy_msgbus.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_MSGBUS_H__
-#define __BPY_MSGBUS_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ PyObject *BPY_msgbus_module(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_MSGBUS_H__ */
diff --git a/source/blender/python/intern/bpy_operator.h b/source/blender/python/intern/bpy_operator.h
index 37a6acfe822..3cb335d5d9a 100644
--- a/source/blender/python/intern/bpy_operator.h
+++ b/source/blender/python/intern/bpy_operator.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_OPERATOR_H__
-#define __BPY_OPERATOR_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -38,5 +37,3 @@ PyObject *BPY_operator_module(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif
diff --git a/source/blender/python/intern/bpy_operator_wrap.h b/source/blender/python/intern/bpy_operator_wrap.h
index 942f9dbea39..9e496cd8d26 100644
--- a/source/blender/python/intern/bpy_operator_wrap.h
+++ b/source/blender/python/intern/bpy_operator_wrap.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_OPERATOR_WRAP_H__
-#define __BPY_OPERATOR_WRAP_H__
+#pragma once
 
 struct wmOperatorType;
 
@@ -37,5 +36,3 @@ void BPY_RNA_operator_macro_wrapper(struct wmOperatorType *ot, void *userdata);
 #ifdef __cplusplus
 }
 #endif
-
-#endif
diff --git a/source/blender/python/intern/bpy_path.h b/source/blender/python/intern/bpy_path.h
index 0da9e610b53..3e25cb26288 100644
--- a/source/blender/python/intern/bpy_path.h
+++ b/source/blender/python/intern/bpy_path.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_PATH_H__
-#define __BPY_PATH_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ PyObject *BPyInit__bpy_path(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif
diff --git a/source/blender/python/intern/bpy_props.h b/source/blender/python/intern/bpy_props.h
index 9bcfe8e263a..3d7860dcdd8 100644
--- a/source/blender/python/intern/bpy_props.h
+++ b/source/blender/python/intern/bpy_props.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_PROPS_H__
-#define __BPY_PROPS_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -36,5 +35,3 @@ StructRNA *pointer_type_from_py(PyObject *value, const char *error_prefix);
 #ifdef __cplusplus
 }
 #endif
-
-#endif
diff --git a/source/blender/python/intern/bpy_rna.h b/source/blender/python/intern/bpy_rna.h
index fadda9a8002..a2c2171d151 100644
--- a/source/blender/python/intern/bpy_rna.h
+++ b/source/blender/python/intern/bpy_rna.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_RNA_H__
-#define __BPY_RNA_H__
+#pragma once
 
 /* --- bpy build options --- */
 #ifdef WITH_PYTHON_SAFETY
@@ -272,5 +271,3 @@ extern BPy_StructRNA *bpy_context_module;
 #ifdef __cplusplus
 }
 #endif
-
-#endif
diff --git a/source/blender/python/intern/bpy_rna_anim.h b/source/blender/python/intern/bpy_rna_anim.h
index 88537778dde..7c840e616b1 100644
--- a/source/blender/python/intern/bpy_rna_anim.h
+++ b/source/blender/python/intern/bpy_rna_anim.h
@@ -14,8 +14,7 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
-#ifndef __BPY_RNA_ANIM_H__
-#define __BPY_RNA_ANIM_H__
+#pragma once
 
 /** \file
  * \ingroup pythonintern
@@ -38,5 +37,3 @@ PyObject *pyrna_struct_driver_remove(BPy_StructRNA *self, PyObject *args);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_RNA_ANIM_H__ */
diff --git a/source/blender/python/intern/bpy_rna_callback.h b/source/blender/python/intern/bpy_rna_callback.h
index 67392b60995..ae42c4cb1a4 100644
--- a/source/blender/python/intern/bpy_rna_callback.h
+++ b/source/blender/python/intern/bpy_rna_callback.h
@@ -14,8 +14,7 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
-#ifndef __BPY_RNA_CALLBACK_H__
-#define __BPY_RNA_CALLBACK_H__
+#pragma once
 
 /** \file
  * \ingroup pythonintern
@@ -39,5 +38,3 @@ PyObject *pyrna_callback_classmethod_remove(PyObject *cls, PyObject *args);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_RNA_CALLBACK_H__ */
diff --git a/source/blender/python/intern/bpy_rna_driver.h b/source/blender/python/intern/bpy_rna_driver.h
index a534f770732..cc2c4550870 100644
--- a/source/blender/python/intern/bpy_rna_driver.h
+++ b/source/blender/python/intern/bpy_rna_driver.h
@@ -14,8 +14,7 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
-#ifndef __BPY_RNA_DRIVER_H__
-#define __BPY_RNA_DRIVER_H__
+#pragma once
 
 /** \file
  * \ingroup pythonintern
@@ -38,5 +37,3 @@ bool pyrna_driver_is_equal_anim_rna(const struct PathResolvedRNA *anim_rna,
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_RNA_DRIVER_H__ */
diff --git a/source/blender/python/intern/bpy_rna_gizmo.h b/source/blender/python/intern/bpy_rna_gizmo.h
index b209dbf4a26..307b694338c 100644
--- a/source/blender/python/intern/bpy_rna_gizmo.h
+++ b/source/blender/python/intern/bpy_rna_gizmo.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_RNA_GIZMO_H__
-#define __BPY_RNA_GIZMO_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ int BPY_rna_gizmo_module(PyObject *);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_RNA_GIZMO_H__ */
diff --git a/source/blender/python/intern/bpy_rna_id_collection.h b/source/blender/python/intern/bpy_rna_id_collection.h
index 223ae126323..320a9e66ff8 100644
--- a/source/blender/python/intern/bpy_rna_id_collection.h
+++ b/source/blender/python/intern/bpy_rna_id_collection.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_RNA_ID_COLLECTION_H__
-#define __BPY_RNA_ID_COLLECTION_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -32,5 +31,3 @@ extern PyMethodDef BPY_rna_id_collection_orphans_purge_method_def;
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_RNA_ID_COLLECTION_H__ */
diff --git a/source/blender/python/intern/bpy_rna_types_capi.h b/source/blender/python/intern/bpy_rna_types_capi.h
index 402dc2c7936..eb8dd14d888 100644
--- a/source/blender/python/intern/bpy_rna_types_capi.h
+++ b/source/blender/python/intern/bpy_rna_types_capi.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_RNA_TYPES_CAPI_H__
-#define __BPY_RNA_TYPES_CAPI_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ void BPY_rna_types_extend_capi(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_RNA_TYPES_CAPI_H__ */
diff --git a/source/blender/python/intern/bpy_traceback.h b/source/blender/python/intern/bpy_traceback.h
index cb23dd23c9b..26f6a574439 100644
--- a/source/blender/python/intern/bpy_traceback.h
+++ b/source/blender/python/intern/bpy_traceback.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_TRACEBACK_H__
-#define __BPY_TRACEBACK_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ void python_script_error_jump(const char *filepath, int *lineno, int *offset);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_TRACEBACK_H__ */
diff --git a/source/blender/python/intern/bpy_utils_previews.h b/source/blender/python/intern/bpy_utils_previews.h
index 23fd0216668..dbe74f619a9 100644
--- a/source/blender/python/intern/bpy_utils_previews.h
+++ b/source/blender/python/intern/bpy_utils_previews.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_UTILS_PREVIEWS_H__
-#define __BPY_UTILS_PREVIEWS_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ PyObject *BPY_utils_previews_module(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_UTILS_PREVIEWS_H__ */
diff --git a/source/blender/python/intern/bpy_utils_units.h b/source/blender/python/intern/bpy_utils_units.h
index add766d0d93..7a135bc6163 100644
--- a/source/blender/python/intern/bpy_utils_units.h
+++ b/source/blender/python/intern/bpy_utils_units.h
@@ -18,8 +18,7 @@
  * \ingroup pythonintern
  */
 
-#ifndef __BPY_UTILS_UNITS_H__
-#define __BPY_UTILS_UNITS_H__
+#pragma once
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,5 +29,3 @@ PyObject *BPY_utils_units(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* __BPY_UTILS_UNITS_H__ */
diff --git a/source/blender/python/mathutils/mathutils.h b/source/blender/python/mathutils/mathutils.h
index c59fa75b651..d8d390cfad0 100644
--- a/source/blender/python/mathutils/mathutils.h
+++ b/source/blender/python/mathutils/mathutils.h
@@ -14,8 +14,7 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
-#ifndef __MATHUTILS_H__
-#define __MATHUTILS_H__
+#pragma once
 
 /** \file
  * \ingroup pymathutils
@@ -195,5 +194,3 @@ int column_vector_multiplication(float rvec[4], VectorObject *vec, MatrixObject
 /* dynstr as python string utility functions */
 PyObject *mathutils_dynstr_to_py(struct DynStr *ds);
 #endif
-
-#endif /* __MATHUTILS_H__ */
diff --git a/source/blender/python/mathutils/mathutils_Color.h b/source/blender/python/mathutils/mathutils_Color.h
index 51e1746ae74..c966bf1e3b2 100644
--- a/source/blender/python/mathutils/mathutils_Color.h
+++ b/source/blender/python/mathutils/mathutils_Color.h
@@ -18,8 +18,7 @@
  * \ingroup pymathutils
  */
 
-#ifndef __MATHUTILS_COLOR_H__
-#define __MATHUTILS_COLOR_H__
+#pragma once
 
 extern PyTypeObject color_Type;
 #define ColorObject_Check(v) PyObject_TypeCheck((v), &color_Type)
@@ -42,5 +41,3 @@ PyObject *Color_CreatePyObject_wrap(float col[3], PyTypeObject *base_type) ATTR_
 PyObject *Color_CreatePyObject_cb(PyObject *cb_user,
                                   unsigned char cb_type,
                                   unsigned char cb_subtype) ATTR_WARN_UNUSED_RESULT;
-
-#endif /* __MATHUTILS_COLOR_H__ */
diff --git a/source/blender/python/mathutils/mathutils_Euler.h b/source/blender/python/mathutils/mathutils_Euler.h
index c56962395e5..0deef3cfdf3 100644
--- a/source/blender/python/mathutils/mathutils_Euler.h
+++ b/source/blender/python/mathutils/mathutils_Euler.h
@@ -14,8 +14,7 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
-#ifndef __MATHUTILS_EULER_H__
-#define __MATHUTILS_EULER_H__
+#pragma once
 
 /** \file
  * \ingroup pymathutils
@@ -50,5 +49,3 @@ PyObject *Euler_CreatePyObject_cb(PyObject *cb_user,
                                   unsigned char cb_subtype) ATTR_WARN_UNUSED_RESULT;
 
 short euler_order_from_string(const char *str, const char *error_prefix);
-
-#endif /* __MATHUTILS_EULER_H__ */
diff --git a/source/blender/python/mathutils/mathutils_Matrix.h b/source/blender/python/mathutils/mathutils_Matrix.h
index a0e2256b1ce..588c0b94891 100644
--- a/source/blender/python/mathutils/mathutils_Matrix.h
+++ b/source/blender/python/mathutils/mathutils_Matrix.h
@@ -18,8 +18,7 @@
  * \ingroup pymathutils
  */
 
-#ifndef __MATHUTILS_MATRIX_H__
-#define __MATHUTILS_MATRIX_H__
+#pragma once
 
 extern PyTypeObject matrix_Type;
 extern PyTypeObject matrix_access_Type;
@@ -96,5 +95,3 @@ extern struct Mathutils_Callback mathutils_matrix_col_cb;
 extern struct Mathutils_Callback mathutils_matrix_translation_cb;
 
 void matrix_as_3x3(float mat[3][3], MatrixObject *self);
-
-#endif /* __MATHUTILS_MATRIX_H__ */
diff --git a/source/blender/python/mathutils/mathutils_Quaternion.h b/source/blender/python/mathutils/mathutils_Quaternion.h
index bc6bd307ece..7d20558939e 100644
--- a/source/blender/python/mathutils/mathutils_Quaternion.h
+++ b/source/blender/python/mathutils/mathutils_Quaternion.h
@@ -14,8 +14,7 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
-#ifndef __MATHUTILS_QUATERNION_H__
-#define __MATHUTILS_QUATERNION_H__
+#pragma once
 
 /** \file
  * \ingroup pymathutils
@@ -44,5 +43,3 @@ PyObject *Quaternion_CreatePyObject_wrap(float quat[4],
 PyObject *Quaternion_CreatePyObject_cb(PyObject *cb_user,
                                        unsigned char cb_type,
                                        unsigned char cb_subtype) ATTR_WARN_UNUSED_RESULT;
-
-#endif /* __MATHUTILS_QUATERNION_H__ */
diff --git a/source/blender/python/mathutils/mathutils_Vector.h b/source/blender/python/mathutils/mathutils_Vector.h
index f75702bc54c..09fc429f9cc 100644
--- a/source/blender/python/mathutils/mathutils_Vector.h
+++ b/source/blender/python/mathutils/mathutils_Vector.h
@@ -18,8 +18,7 @@
  * \ingroup pymathutils
  */
 
-#ifndef __MATHUTILS_VECTOR_H__
-#define __MATHUTILS_VECTOR_H__
+#pragma once
 
 extern PyTypeObject vector_Type;
 
@@ -48,5 +47,3 @@ PyObject *Vector_CreatePyObject_alloc(float *vec,
                                       const int size,
                                       PyTypeObject *base_type) ATTR_WARN_UNUSED_RESULT
     ATTR_NONNULL(1);
-
-#endif /* __MATHUTILS_VECTOR_H__ */
diff --git a/source/blender/python/mathutils/mathutils_bvhtree.h b/source/blender/python/mathutils/mathutils_bvhtree.h
index 2991982f3a2..82b09f11e5e 100644
--- a/source/blender/python/mathutils/mathutils_bvhtree.h
+++ b/source/blender/python/mathutils/mathutils_bvhtree.h
@@ -18,8 +18,7 @@
  * \ingroup mathutils
  */
 
-#ifndef __MATHUTILS_BVHTREE_H__
-#define __MATHUTILS_BVHTREE_H__
+#pragma once
 
 PyMODINIT_FUNC PyInit_mathutils_bvhtree(void);
 
@@ -27,5 +26,3 @@ extern PyTypeObject PyBVHTree_Type;
 
 #define PyBVHTree_Check(v) PyObject_TypeCheck((v), &PyBVHTree_Type)
 #define PyBVHTree_CheckExact(v) (Py_TYPE(v) == &PyBVHTree_Type)
-
-#endif /* __MATHUTILS_BVHTREE_H__ */
diff --git a/source/blender/python/mathutils/mathutils_geometry.h b/source/blender/python/mathutils/mathutils_geometry.h
index 5a1198b4a26..4a200ec98ca 100644
--- a/source/blender/python/mathutils/mathutils_geometry.h
+++ b/source/blender/python/mathutils/mathutils_geometry.h
@@ -14,13 +14,10 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
-#ifndef __MATHUTILS_GEOMETRY_H__
-#define __MATHUTILS_GEOMETRY_H__
+#pragma once
 
 /** \file
  * \ingroup pymathutils
  */
 
 PyMODINIT_FUNC PyInit_mathutils_geometry(void);
-
-#endif /* __MATHUTILS_GEOMETRY_H__ */
diff --git a/source/blender/python/mathutils/mathutils_interpolate.h b/source/blender/python/mathutils/mathutils_interpolate.h
index 50dee1ee8de..c51d2b6905b 100644
--- a/source/blender/python/mathutils/mathutils_interpolate.h
+++ b/source/blender/python/mathutils/mathutils_interpolate.h
@@ -14,13 +14,10 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
-#ifndef __MATHUTILS_INTERPOLATE_H__
-#define __MATHUTILS_INTERPOLATE_H__
+#pragma once
 
 /** \file
  * \ingroup pymathutils
  */
 
 PyMODINIT_FUNC PyInit_mathutils_interpolate(void);
-
-#endif /* __MATHUTILS_INTERPOLATE_H__ */
diff --git a/source/blender/python/mathutils/mathutils_kdtree.h b/source/blender/python/mathutils/mathutils_kdtree.h
index 99411997282..3df3fc8d382 100644
--- a/source/blender/python/mathutils/mathutils_kdtree.h
+++ b/source/blender/python/mathutils/mathutils_kdtree.h
@@ -18,11 +18,8 @@
  * \ingroup mathutils
  */
 
-#ifndef __MATHUTILS_KDTREE_H__
-#define __MATHUTILS_KDTREE_H__
+#pragma once
 
 PyMODINIT_FUNC PyInit_mathutils_kdtree(void);
 
 extern PyTypeObject PyKDTree_Type;
-
-#endif /* __MATHUTILS_KDTREE_H__ */
diff --git a/source/blender/python/mathutils/mathutils_noise.h b/source/blender/python/mathutils/mathutils_noise.h
index 8204c084947..da5e1a99a03 100644
--- a/source/blender/python/mathutils/mathutils_noise.h
+++ b/source/blender/python/mathutils/mathutils_noise.h
@@ -18,9 +18,6 @@
  * \ingroup mathutils
  */
 
-#ifndef __MATHUTILS_NOISE_H__
-#define __MATHUTILS_NOISE_H__
+#pragma once
 
 PyMODINIT_FUNC PyInit_mathutils_noise(void);
-
-#endif /* __MATHUTILS_NOISE_H__ */