Cleanup: Declare variables where initialized

Also reduce the scope of some variable declarations.
This also allows making some variables constant.

source/blender/editors/interface/interface_layout.c

@@ -312,16 +312,13 @@ static bool ui_layout_variable_size(uiLayout *layout)
 /* estimated size of text + icon */
 static int ui_text_icon_width(uiLayout *layout, const char *name, int icon, bool compact)
 {
-  bool variable;
   const int unit_x = UI_UNIT_X * (layout->scale[0] ? layout->scale[0] : 1.0f);
 
   if (icon && !name[0]) {
     return unit_x; /* icon only */
   }
 
-  variable = ui_layout_variable_size(layout);
+  if (ui_layout_variable_size(layout)) {
-
-  if (variable) {
     if (!icon && !name[0]) {
       return unit_x; /* No icon or name. */
     }
@@ -510,7 +507,6 @@ int uiLayoutGetLocalDir(const uiLayout *layout)
 static uiLayout *ui_item_local_sublayout(uiLayout *test, uiLayout *layout, bool align)
 {
   uiLayout *sub;
-
   if (uiLayoutGetLocalDir(test) == UI_LAYOUT_HORIZONTAL) {
     sub = uiLayoutRow(layout, align);
   }
@@ -569,17 +565,12 @@ static void ui_item_array(uiLayout *layout,
                           bool show_text)
 {
   const uiStyle *style = layout->root->style;
-  uiBut *but;
-  PropertyType type;
-  PropertySubType subtype;
-  uiLayout *sub;
-  uint a, b;
 
   /* retrieve type and subtype */
-  type = RNA_property_type(prop);
+  const PropertyType type = RNA_property_type(prop);
-  subtype = RNA_property_subtype(prop);
+  const PropertySubType subtype = RNA_property_subtype(prop);
 
-  sub = ui_item_local_sublayout(layout, layout, 1);
+  uiLayout *sub = ui_item_local_sublayout(layout, layout, 1);
   UI_block_layout_set_current(block, sub);
 
   /* create label */
@@ -590,17 +581,15 @@ static void ui_item_array(uiLayout *layout,
   /* create buttons */
   if (type == PROP_BOOLEAN && ELEM(subtype, PROP_LAYER, PROP_LAYER_MEMBER)) {
     /* special check for layer layout */
-    int butw, buth, unit;
     const int cols = (len >= 20) ? 2 : 1;
-    const uint colbuts = len / (2 * cols);
+    const int colbuts = len / (2 * cols);
     uint layer_used = 0;
     uint layer_active = 0;
 
     UI_block_layout_set_current(block, uiLayoutAbsolute(layout, false));
 
-    unit = UI_UNIT_X * 0.75;
+    const int butw = UI_UNIT_X * 0.75;
-    butw = unit;
+    const int buth = UI_UNIT_X * 0.75;
-    buth = unit;
 
     if (ptr->type == &RNA_Armature) {
       bArmature *arm = ptr->data;
@@ -619,10 +608,10 @@ static void ui_item_array(uiLayout *layout,
       }
     }
 
-    for (b = 0; b < cols; b++) {
+    for (int b = 0; b < cols; b++) {
       UI_block_align_begin(block);
 
-      for (a = 0; a < colbuts; a++) {
+      for (int a = 0; a < colbuts; a++) {
         const int layer_num = a + b * colbuts;
         const uint layer_flag = (1u << layer_num);
 
@@ -638,13 +627,13 @@ static void ui_item_array(uiLayout *layout,
           icon = ICON_BLANK1;
         }
 
-        but = uiDefAutoButR(
+        uiBut *but = uiDefAutoButR(
             block, ptr, prop, layer_num, "", icon, x + butw * a, y + buth, butw, buth);
         if (subtype == PROP_LAYER_MEMBER) {
           UI_but_func_set(but, ui_layer_but_cb, but, POINTER_FROM_INT(layer_num));
         }
       }
-      for (a = 0; a < colbuts; a++) {
+      for (int a = 0; a < colbuts; a++) {
         const int layer_num = a + len / 2 + b * colbuts;
         const uint layer_flag = (1u << layer_num);
 
@@ -660,7 +649,8 @@ static void ui_item_array(uiLayout *layout,
           icon = ICON_BLANK1;
         }
 
-        but = uiDefAutoButR(block, ptr, prop, layer_num, "", icon, x + butw * a, y, butw, buth);
+        uiBut *but = uiDefAutoButR(
+            block, ptr, prop, layer_num, "", icon, x + butw * a, y, butw, buth);
         if (subtype == PROP_LAYER_MEMBER) {
           UI_but_func_set(but, ui_layer_but_cb, but, POINTER_FROM_INT(layer_num));
         }
@@ -685,20 +675,20 @@ static void ui_item_array(uiLayout *layout,
     w /= dim_size[0];
     /* h /= dim_size[1]; */ /* UNUSED */
 
-    for (a = 0; a < len; a++) {
+    for (int a = 0; a < len; a++) {
       col = a % dim_size[0];
       row = a / dim_size[0];
 
-      but = uiDefAutoButR(block,
+      uiBut *but = uiDefAutoButR(block,
-                          ptr,
+                                 ptr,
-                          prop,
+                                 prop,
-                          a,
+                                 a,
-                          "",
+                                 "",
-                          ICON_NONE,
+                                 ICON_NONE,
-                          x + w * col,
+                                 x + w * col,
-                          y + (dim_size[1] * UI_UNIT_Y) - (row * UI_UNIT_Y),
+                                 y + (dim_size[1] * UI_UNIT_Y) - (row * UI_UNIT_Y),
-                          w,
+                                 w,
-                          UI_UNIT_Y);
+                                 UI_UNIT_Y);
       if (slider && but->type == UI_BTYPE_NUM) {
         uiButNumber *number_but = (uiButNumber *)but;
 
@@ -734,8 +724,6 @@ static void ui_item_array(uiLayout *layout,
       uiDefAutoButR(block, ptr, prop, -1, "", ICON_NONE, 0, 0, w, UI_UNIT_Y);
     }
     else {
-      bool *boolarr = NULL;
-
       /* even if 'expand' is fale, expanding anyway */
 
       /* layout for known array subtypes */
@@ -748,6 +736,7 @@ static void ui_item_array(uiLayout *layout,
       }
 
       /* show checkboxes for rna on a non-emboss block (menu for eg) */
+      bool *boolarr = NULL;
       if (type == PROP_BOOLEAN &&
           ELEM(layout->root->block->emboss, UI_EMBOSS_NONE, UI_EMBOSS_PULLDOWN)) {
         boolarr = MEM_callocN(sizeof(bool) * len, __func__);
@@ -755,9 +744,7 @@ static void ui_item_array(uiLayout *layout,
       }
 
       const char *str_buf = show_text ? str : "";
-      for (a = 0; a < len; a++) {
+      for (int a = 0; a < len; a++) {
-        int width_item;
-
         if (!icon_only && show_text) {
           str[0] = RNA_property_array_item_char(prop, a);
         }
@@ -765,11 +752,12 @@ static void ui_item_array(uiLayout *layout,
           icon = boolarr[a] ? ICON_CHECKBOX_HLT : ICON_CHECKBOX_DEHLT;
         }
 
-        width_item = ((compact && type == PROP_BOOLEAN) ?
+        const int width_item = ((compact && type == PROP_BOOLEAN) ?
-                          min_ii(w, ui_text_icon_width(layout, str_buf, icon, false)) :
+                                    min_ii(w, ui_text_icon_width(layout, str_buf, icon, false)) :
-                          w);
+                                    w);
 
-        but = uiDefAutoButR(block, ptr, prop, a, str_buf, icon, 0, 0, width_item, UI_UNIT_Y);
+        uiBut *but = uiDefAutoButR(
+            block, ptr, prop, a, str_buf, icon, 0, 0, width_item, UI_UNIT_Y);
         if (slider && but->type == UI_BTYPE_NUM) {
           uiButNumber *number_but = (uiButNumber *)but;
 
@@ -832,7 +820,6 @@ static void ui_item_enum_expand_elem_exec(uiLayout *layout,
   const int itemw = ui_text_icon_width(block->curlayout, icon_only ? "" : name, icon, 0);
 
   uiBut *but;
-
   if (icon && name[0] && !icon_only) {
     but = uiDefIconTextButR_prop(
         block, but_type, 0, icon, name, 0, 0, itemw, h, ptr, prop, -1, 0, value, -1, -1, NULL);
@@ -886,13 +873,12 @@ static void ui_item_enum_expand_exec(uiLayout *layout,
    * - mont29
    */
 
-  const EnumPropertyItem *item, *item_array;
-  bool free;
-
   BLI_assert(RNA_property_type(prop) == PROP_ENUM);
 
-  uiLayout *layout_radial = NULL;
   const bool radial = (layout->root->type == UI_LAYOUT_PIEMENU);
+
+  bool free;
+  const EnumPropertyItem *item_array;
   if (radial) {
     RNA_property_enum_items_gettexted_all(block->evil_C, ptr, prop, &item_array, NULL, &free);
   }
@@ -901,6 +887,7 @@ static void ui_item_enum_expand_exec(uiLayout *layout,
   }
 
   /* we dont want nested rows, cols in menus */
+  uiLayout *layout_radial = NULL;
   if (radial) {
     if (layout->root->layout == layout) {
       layout_radial = uiLayoutRadial(layout);
@@ -921,7 +908,7 @@ static void ui_item_enum_expand_exec(uiLayout *layout,
     UI_block_layout_set_current(block, ui_item_local_sublayout(layout, layout, 1));
   }
 
-  for (item = item_array; item->identifier; item++) {
+  for (const EnumPropertyItem *item = item_array; item->identifier; item++) {
     const bool is_first = item == item_array;
 
     if (!item->identifier[0]) {
@@ -1016,9 +1003,6 @@ static uiBut *ui_item_with_label(uiLayout *layout,
                                  int flag)
 {
   uiLayout *sub = layout;
-  uiBut *but = NULL;
-  PropertyType type;
-  PropertySubType subtype;
   int prop_but_width = w_hint;
 #ifdef UI_PROP_DECORATE
   uiLayout *layout_prop_decorate = NULL;
@@ -1047,7 +1031,6 @@ static uiBut *ui_item_with_label(uiLayout *layout,
 #endif
     {
       int w_label;
-
       if (ui_layout_variable_size(layout)) {
         /* w_hint is width for label in this case.
          * Use a default width for property button(s) */
@@ -1061,9 +1044,10 @@ static uiBut *ui_item_with_label(uiLayout *layout,
     }
   }
 
-  type = RNA_property_type(prop);
+  const PropertyType type = RNA_property_type(prop);
-  subtype = RNA_property_subtype(prop);
+  const PropertySubType subtype = RNA_property_subtype(prop);
 
+  uiBut *but;
   if (subtype == PROP_FILEPATH || subtype == PROP_DIRPATH) {
     UI_block_layout_set_current(block, uiLayoutRow(sub, true));
     but = uiDefAutoButR(block, ptr, prop, index, "", icon, x, y, prop_but_width - UI_UNIT_X, h);
@@ -1204,8 +1188,6 @@ static void ui_but_tip_from_enum_item(uiBut *but, const EnumPropertyItem *item)
 static void ui_item_disabled(uiLayout *layout, const char *name)
 {
   uiBlock *block = layout->root->block;
-  uiBut *but;
-  int w;
 
   UI_block_layout_set_current(block, layout);
 
@@ -1213,9 +1195,10 @@ static void ui_item_disabled(uiLayout *layout, const char *name)
     name = "";
   }
 
-  w = ui_text_icon_width(layout, name, 0, 0);
+  const int w = ui_text_icon_width(layout, name, 0, 0);
 
-  but = uiDefBut(block, UI_BTYPE_LABEL, 0, name, 0, 0, w, UI_UNIT_Y, NULL, 0.0, 0.0, 0, 0, "");
+  uiBut *but = uiDefBut(
+      block, UI_BTYPE_LABEL, 0, name, 0, 0, w, UI_UNIT_Y, NULL, 0.0, 0.0, 0, 0, "");
   UI_but_disable(but, "");
 }
 
@@ -1235,8 +1218,6 @@ static uiBut *uiItemFullO_ptr_ex(uiLayout *layout,
 {
   /* Take care to fill 'r_opptr' whatever happens. */
   uiBlock *block = layout->root->block;
-  uiBut *but;
-  int w;
 
   if (!name) {
     if (ot && ot->srna && (flag & UI_ITEM_R_ICON_ONLY) == 0) {
@@ -1254,7 +1235,7 @@ static uiBut *uiItemFullO_ptr_ex(uiLayout *layout,
   /* create button */
   UI_block_layout_set_current(block, layout);
 
-  w = ui_text_icon_width(layout, name, icon, 0);
+  const int w = ui_text_icon_width(layout, name, icon, 0);
 
   const int prev_emboss = layout->emboss;
   if (flag & UI_ITEM_R_NO_BG) {
@@ -1262,6 +1243,7 @@ static uiBut *uiItemFullO_ptr_ex(uiLayout *layout,
   }
 
   /* create the button */
+  uiBut *but;
   if (icon) {
     if (name[0]) {
       but = uiDefIconTextButO_ptr(
@@ -1409,11 +1391,11 @@ static const char *ui_menu_enumpropname(uiLayout *layout,
                                         PropertyRNA *prop,
                                         int retval)
 {
-  const EnumPropertyItem *item;
   bool free;
-  const char *name;
+  const EnumPropertyItem *item;
-
   RNA_property_enum_items(layout->root->block->evil_C, ptr, prop, &item, NULL, &free);
+
+  const char *name;
   if (RNA_enum_name(item, retval, &name)) {
     name = CTX_IFACE_(RNA_property_translation_context(prop), name);
   }
@@ -1436,14 +1418,10 @@ void uiItemEnumO_ptr(uiLayout *layout,
                      int value)
 {
   PointerRNA ptr;
-  PropertyRNA *prop;
-
   WM_operator_properties_create_ptr(&ptr, ot);
 
-  if ((prop = RNA_struct_find_property(&ptr, propname))) {
+  PropertyRNA *prop = RNA_struct_find_property(&ptr, propname);
-    /* pass */
+  if (prop == NULL) {
-  }
-  else {
     RNA_warning("%s.%s not found", RNA_struct_identifier(ptr.type), propname);
     return;
   }
@@ -1502,7 +1480,6 @@ void uiItemsFullEnumO_items(uiLayout *layout,
   }
 
   uiLayout *target, *split = NULL;
-  const EnumPropertyItem *item;
   uiBlock *block = layout->root->block;
   const bool radial = ui_layout_is_radial(layout);
 
@@ -1534,10 +1511,9 @@ void uiItemsFullEnumO_items(uiLayout *layout,
     target = uiLayoutColumn(split, layout->align);
   }
 
-  int i;
   bool last_iter = false;
-
+  const EnumPropertyItem *item = item_array;
-  for (i = 1, item = item_array; item->identifier && !last_iter; i++, item++) {
+  for (int i = 1; item->identifier && !last_iter; i++, item++) {
     /* handle oversized pies */
     if (radial && (totitem > PIE_MAX_ITEMS) && (i >= PIE_MAX_ITEMS)) {
       if (item->name) { /* only visible items */
@@ -1566,7 +1542,6 @@ void uiItemsFullEnumO_items(uiLayout *layout,
 
     if (item->identifier[0]) {
       PointerRNA tptr;
-
       WM_operator_properties_create_ptr(&tptr, ot);
       if (properties) {
         if (tptr.data) {
@@ -1589,8 +1564,6 @@ void uiItemsFullEnumO_items(uiLayout *layout,
     }
     else {
       if (item->name) {
-        uiBut *but;
-
         if (item != item_array && !radial && split != NULL) {
           target = uiLayoutColumn(split, layout->align);
 
@@ -1598,6 +1571,7 @@ void uiItemsFullEnumO_items(uiLayout *layout,
           block->flag |= UI_BLOCK_NO_FLIP;
         }
 
+        uiBut *but;
         if (item->icon || radial) {
           uiItemL(target, item->name, item->icon);
 
@@ -1647,24 +1621,22 @@ void uiItemsFullEnumO(uiLayout *layout,
 {
   wmOperatorType *ot = WM_operatortype_find(opname, 0); /* print error next */
 
-  PointerRNA ptr;
-  PropertyRNA *prop;
-  uiBlock *block = layout->root->block;
-
   if (!ot || !ot->srna) {
     ui_item_disabled(layout, opname);
     RNA_warning("%s '%s'", ot ? "unknown operator" : "operator missing srna", opname);
     return;
   }
 
+  PointerRNA ptr;
   WM_operator_properties_create_ptr(&ptr, ot);
   /* so the context is passed to itemf functions (some need it) */
   WM_operator_properties_sanitize(&ptr, false);
-  prop = RNA_struct_find_property(&ptr, propname);
+  PropertyRNA *prop = RNA_struct_find_property(&ptr, propname);
 
   /* don't let bad properties slip through */
   BLI_assert((prop == NULL) || (RNA_property_type(prop) == PROP_ENUM));
 
+  uiBlock *block = layout->root->block;
   if (prop && RNA_property_type(prop) == PROP_ENUM) {
     const EnumPropertyItem *item_array = NULL;
     int totitem;
@@ -1721,18 +1693,14 @@ void uiItemEnumO_value(uiLayout *layout,
                        int value)
 {
   wmOperatorType *ot = WM_operatortype_find(opname, 0); /* print error next */
-  PointerRNA ptr;
-  PropertyRNA *prop;
-
   UI_OPERATOR_ERROR_RET(ot, opname, return );
 
+  PointerRNA ptr;
   WM_operator_properties_create_ptr(&ptr, ot);
 
   /* enum lookup */
-  if ((prop = RNA_struct_find_property(&ptr, propname))) {
+  PropertyRNA *prop = RNA_struct_find_property(&ptr, propname);
-    /* pass */
+  if (prop == NULL) {
-  }
-  else {
     RNA_warning("%s.%s not found", RNA_struct_identifier(ptr.type), propname);
     return;
   }
@@ -1755,39 +1723,36 @@ void uiItemEnumO_string(uiLayout *layout,
                         const char *value_str)
 {
   wmOperatorType *ot = WM_operatortype_find(opname, 0); /* print error next */
-  PointerRNA ptr;
-  PropertyRNA *prop;
-
-  const EnumPropertyItem *item;
-  int value;
-  bool free;
-
   UI_OPERATOR_ERROR_RET(ot, opname, return );
 
+  PointerRNA ptr;
   WM_operator_properties_create_ptr(&ptr, ot);
 
-  /* enum lookup */
+  PropertyRNA *prop = RNA_struct_find_property(&ptr, propname);
-  if ((prop = RNA_struct_find_property(&ptr, propname))) {
+  if (prop == NULL) {
-    /* no need for translations here */
+    RNA_warning("%s.%s not found", RNA_struct_identifier(ptr.type), propname);
-    RNA_property_enum_items(layout->root->block->evil_C, &ptr, prop, &item, NULL, &free);
+    return;
-    if (item == NULL || RNA_enum_value_from_id(item, value_str, &value) == 0) {
+  }
-      if (free) {
-        MEM_freeN((void *)item);
-      }
-      RNA_warning(
-          "%s.%s, enum %s not found", RNA_struct_identifier(ptr.type), propname, value_str);
-      return;
-    }
 
+  /* enum lookup */
+  /* no need for translations here */
+  const EnumPropertyItem *item;
+  bool free;
+  RNA_property_enum_items(layout->root->block->evil_C, &ptr, prop, &item, NULL, &free);
+
+  int value;
+  if (item == NULL || RNA_enum_value_from_id(item, value_str, &value) == 0) {
     if (free) {
       MEM_freeN((void *)item);
     }
-  }
+    RNA_warning("%s.%s, enum %s not found", RNA_struct_identifier(ptr.type), propname, value_str);
-  else {
-    RNA_warning("%s.%s not found", RNA_struct_identifier(ptr.type), propname);
     return;
   }
 
+  if (free) {
+    MEM_freeN((void *)item);
+  }
+
   RNA_property_enum_set(&ptr, prop, value);
 
   /* same as uiItemEnumO */
@@ -1806,10 +1771,9 @@ void uiItemBooleanO(uiLayout *layout,
                     int value)
 {
   wmOperatorType *ot = WM_operatortype_find(opname, 0); /* print error next */
-  PointerRNA ptr;
-
   UI_OPERATOR_ERROR_RET(ot, opname, return );
 
+  PointerRNA ptr;
   WM_operator_properties_create_ptr(&ptr, ot);
   RNA_boolean_set(&ptr, propname, value);
 
@@ -1824,10 +1788,9 @@ void uiItemIntO(uiLayout *layout,
                 int value)
 {
   wmOperatorType *ot = WM_operatortype_find(opname, 0); /* print error next */
-  PointerRNA ptr;
-
   UI_OPERATOR_ERROR_RET(ot, opname, return );
 
+  PointerRNA ptr;
   WM_operator_properties_create_ptr(&ptr, ot);
   RNA_int_set(&ptr, propname, value);
 
@@ -1842,10 +1805,10 @@ void uiItemFloatO(uiLayout *layout,
                   float value)
 {
   wmOperatorType *ot = WM_operatortype_find(opname, 0); /* print error next */
-  PointerRNA ptr;
 
   UI_OPERATOR_ERROR_RET(ot, opname, return );
 
+  PointerRNA ptr;
   WM_operator_properties_create_ptr(&ptr, ot);
   RNA_float_set(&ptr, propname, value);
 
@@ -1860,10 +1823,10 @@ void uiItemStringO(uiLayout *layout,
                    const char *value)
 {
   wmOperatorType *ot = WM_operatortype_find(opname, 0); /* print error next */
-  PointerRNA ptr;
 
   UI_OPERATOR_ERROR_RET(ot, opname, return );
 
+  PointerRNA ptr;
   WM_operator_properties_create_ptr(&ptr, ot);
   RNA_string_set(&ptr, propname, value);
 
@@ -1888,16 +1851,14 @@ static void ui_item_rna_size(uiLayout *layout,
                              int *r_w,
                              int *r_h)
 {
-  PropertyType type;
+  int w = 0, h;
-  PropertySubType subtype;
-  int len, w = 0, h;
-  bool is_checkbox_only = false;
 
   /* arbitrary extended width by type */
-  type = RNA_property_type(prop);
+  PropertyType type = RNA_property_type(prop);
-  subtype = RNA_property_subtype(prop);
+  PropertySubType subtype = RNA_property_subtype(prop);
-  len = RNA_property_array_length(ptr, prop);
+  const int len = RNA_property_array_length(ptr, prop);
 
+  bool is_checkbox_only = false;
   if (!name[0] && !icon_only) {
     if (ELEM(type, PROP_STRING, PROP_POINTER)) {
       name = "non-empty text";
@@ -1911,12 +1872,12 @@ static void ui_item_rna_size(uiLayout *layout,
     }
     else if (type == PROP_ENUM) {
       /* Find the longest enum item name, instead of using a dummy text! */
-      const EnumPropertyItem *item, *item_array;
+      const EnumPropertyItem *item_array;
       bool free;
-
       RNA_property_enum_items_gettexted(
           layout->root->block->evil_C, ptr, prop, &item_array, NULL, &free);
-      for (item = item_array; item->identifier; item++) {
+
+      for (const EnumPropertyItem *item = item_array; item->identifier; item++) {
         if (item->identifier[0]) {
           w = max_ii(w, ui_text_icon_width(layout, item->name, item->icon, compact));
         }
@@ -2606,10 +2567,6 @@ void uiItemEnumR_string_prop(uiLayout *layout,
                              const char *name,
                              int icon)
 {
-  const EnumPropertyItem *item;
-  int ivalue, a;
-  bool free;
-
   if (UNLIKELY(RNA_property_type(prop) != PROP_ENUM)) {
     const char *propname = RNA_property_identifier(prop);
     ui_item_disabled(layout, propname);
@@ -2617,8 +2574,11 @@ void uiItemEnumR_string_prop(uiLayout *layout,
     return;
   }
 
+  const EnumPropertyItem *item;
+  bool free;
   RNA_property_enum_items(layout->root->block->evil_C, ptr, prop, &item, NULL, &free);
 
+  int ivalue;
   if (!RNA_enum_value_from_id(item, value, &ivalue)) {
     const char *propname = RNA_property_identifier(prop);
     if (free) {
@@ -2629,7 +2589,7 @@ void uiItemEnumR_string_prop(uiLayout *layout,
     return;
   }
 
-  for (a = 0; item[a].identifier; a++) {
+  for (int a = 0; item[a].identifier; a++) {
     if (item[a].identifier[0] == '\0') {
       /* Skip enum item separators. */
       continue;
@@ -2669,11 +2629,9 @@ void uiItemEnumR_string(uiLayout *layout,
 
 void uiItemsEnumR(uiLayout *layout, struct PointerRNA *ptr, const char *propname)
 {
-  PropertyRNA *prop;
   uiBlock *block = layout->root->block;
-  uiBut *bt;
 
-  prop = RNA_struct_find_property(ptr, propname);
+  PropertyRNA *prop = RNA_struct_find_property(ptr, propname);
 
   if (!prop) {
     ui_item_disabled(layout, propname);
@@ -2686,12 +2644,12 @@ void uiItemsEnumR(uiLayout *layout, struct PointerRNA *ptr, const char *propname
     return;
   }
 
-  const EnumPropertyItem *item;
-  int totitem;
-  bool free;
   uiLayout *split = uiLayoutSplit(layout, 0.0f, false);
   uiLayout *column = uiLayoutColumn(split, false);
 
+  int totitem;
+  const EnumPropertyItem *item;
+  bool free;
   RNA_property_enum_items_gettexted(block->evil_C, ptr, prop, &item, &totitem, &free);
 
   for (int i = 0; i < totitem; i++) {
@@ -2708,7 +2666,7 @@ void uiItemsEnumR(uiLayout *layout, struct PointerRNA *ptr, const char *propname
         }
 
         uiItemL(column, item[i].name, ICON_NONE);
-        bt = block->buttons.last;
+        uiBut *bt = block->buttons.last;
         bt->drawflag = UI_BUT_TEXT_LEFT;
 
         ui_but_tip_from_enum_item(bt, &item[i]);
@@ -2731,8 +2689,6 @@ void uiItemsEnumR(uiLayout *layout, struct PointerRNA *ptr, const char *propname
 
 static void search_id_collection(StructRNA *ptype, PointerRNA *r_ptr, PropertyRNA **r_prop)
 {
-  StructRNA *srna;
-
   /* look for collection property in Main */
   /* Note: using global Main is OK-ish here, UI shall not access other Mains anyay... */
   RNA_main_pointer_create(G_MAIN, r_ptr);
@@ -2742,7 +2698,7 @@ static void search_id_collection(StructRNA *ptype, PointerRNA *r_ptr, PropertyRN
   RNA_STRUCT_BEGIN (r_ptr, iprop) {
     /* if it's a collection and has same pointer type, we've got it */
     if (RNA_property_type(iprop) == PROP_COLLECTION) {
-      srna = RNA_property_pointer_type(r_ptr, iprop);
+      StructRNA *srna = RNA_property_pointer_type(r_ptr, iprop);
 
       if (ptype == srna) {
         *r_prop = iprop;
@@ -2766,13 +2722,11 @@ static void ui_rna_collection_search_arg_free_fn(void *ptr)
 uiBut *ui_but_add_search(
     uiBut *but, PointerRNA *ptr, PropertyRNA *prop, PointerRNA *searchptr, PropertyRNA *searchprop)
 {
-  StructRNA *ptype;
-  PointerRNA sptr;
-
   /* for ID's we do automatic lookup */
   if (!searchprop) {
     if (RNA_property_type(prop) == PROP_POINTER) {
-      ptype = RNA_property_pointer_type(ptr, prop);
+      StructRNA *ptype = RNA_property_pointer_type(ptr, prop);
+      PointerRNA sptr;
       search_id_collection(ptype, &sptr, &searchprop);
       searchptr = &sptr;
     }
@@ -2833,17 +2787,11 @@ void uiItemPointerR_prop(uiLayout *layout,
                          const char *name,
                          int icon)
 {
-  PropertyType type;
-  uiBut *but;
-  uiBlock *block;
-  StructRNA *icontype;
-  int w, h;
-  char namestr[UI_MAX_NAME_STR];
   const bool use_prop_sep = ((layout->item.flag & UI_ITEM_PROP_SEP) != 0);
 
   layout_root_new_button_group(layout->root);
 
-  type = RNA_property_type(prop);
+  const PropertyType type = RNA_property_type(prop);
   if (!ELEM(type, PROP_POINTER, PROP_STRING, PROP_ENUM)) {
     RNA_warning("Property %s.%s must be a pointer, string or enum",
                 RNA_struct_identifier(ptr->type),
@@ -2859,6 +2807,7 @@ void uiItemPointerR_prop(uiLayout *layout,
 
   /* get icon & name */
   if (icon == ICON_NONE) {
+    StructRNA *icontype;
     if (type == PROP_POINTER) {
       icontype = RNA_property_pointer_type(ptr, prop);
     }
@@ -2872,16 +2821,18 @@ void uiItemPointerR_prop(uiLayout *layout,
     name = RNA_property_ui_name(prop);
   }
 
+  char namestr[UI_MAX_NAME_STR];
   if (use_prop_sep == false) {
     name = ui_item_name_add_colon(name, namestr);
   }
 
   /* create button */
-  block = uiLayoutGetBlock(layout);
+  uiBlock *block = uiLayoutGetBlock(layout);
 
+  int w, h;
   ui_item_rna_size(layout, name, icon, ptr, prop, 0, 0, false, &w, &h);
   w += UI_UNIT_X; /* X icon needs more space */
-  but = ui_item_with_label(layout, block, name, icon, ptr, prop, 0, 0, 0, w, h, 0);
+  uiBut *but = ui_item_with_label(layout, block, name, icon, ptr, prop, 0, 0, 0, w, h, 0);
 
   ui_but_add_search(but, ptr, prop, searchptr, searchprop);
 }
@@ -2894,15 +2845,13 @@ void uiItemPointerR(uiLayout *layout,
                     const char *name,
                     int icon)
 {
-  PropertyRNA *prop, *searchprop;
-
   /* validate arguments */
-  prop = RNA_struct_find_property(ptr, propname);
+  PropertyRNA *prop = RNA_struct_find_property(ptr, propname);
   if (!prop) {
     RNA_warning("property not found: %s.%s", RNA_struct_identifier(ptr->type), propname);
     return;
   }
-  searchprop = RNA_struct_find_property(searchptr, searchpropname);
+  PropertyRNA *searchprop = RNA_struct_find_property(searchptr, searchpropname);
   if (!searchprop) {
     RNA_warning("search collection property not found: %s.%s",
                 RNA_struct_identifier(searchptr->type),
@@ -2944,8 +2893,6 @@ static uiBut *ui_item_menu(uiLayout *layout,
 {
   uiBlock *block = layout->root->block;
   uiLayout *heading_layout = ui_layout_heading_find(layout);
-  uiBut *but;
-  int w, h;
 
   UI_block_layout_set_current(block, layout);
   layout_root_new_button_group(layout->root);
@@ -2957,8 +2904,8 @@ static uiBut *ui_item_menu(uiLayout *layout,
     icon = ICON_BLANK1;
   }
 
-  w = ui_text_icon_width(layout, name, icon, 1);
+  int w = ui_text_icon_width(layout, name, icon, 1);
-  h = UI_UNIT_Y;
+  int h = UI_UNIT_Y;
 
   if (layout->root->type == UI_LAYOUT_HEADER) { /* ugly .. */
     if (icon == ICON_NONE && force_menu) {
@@ -2978,6 +2925,7 @@ static uiBut *ui_item_menu(uiLayout *layout,
     ui_layout_heading_label_add(layout, heading_layout, true, true);
   }
 
+  uiBut *but;
   if (name[0] && icon) {
     but = uiDefIconTextMenuBut(block, func, arg, icon, name, 0, 0, w, h, tip);
   }
@@ -3058,10 +3006,9 @@ void uiItemMContents(uiLayout *layout, const char *menuname)
 void uiItemDecoratorR_prop(uiLayout *layout, PointerRNA *ptr, PropertyRNA *prop, int index)
 {
   uiBlock *block = layout->root->block;
-  uiLayout *col;
 
   UI_block_layout_set_current(block, layout);
-  col = uiLayoutColumn(layout, false);
+  uiLayout *col = uiLayoutColumn(layout, false);
   col->space = 0;
   col->emboss = UI_EMBOSS_NONE;
 
@@ -3212,8 +3159,6 @@ void uiItemPopoverPanelFromGroup(uiLayout *layout,
 static uiBut *uiItemL_(uiLayout *layout, const char *name, int icon)
 {
   uiBlock *block = layout->root->block;
-  uiBut *but;
-  int w;
 
   UI_block_layout_set_current(block, layout);
   layout_root_new_button_group(layout->root);
@@ -3225,8 +3170,9 @@ static uiBut *uiItemL_(uiLayout *layout, const char *name, int icon)
     icon = ICON_BLANK1;
   }
 
-  w = ui_text_icon_width(layout, name, icon, 0);
+  const int w = ui_text_icon_width(layout, name, icon, 0);
 
+  uiBut *but;
   if (icon && name[0]) {
     but = uiDefIconTextBut(
         block, UI_BTYPE_LABEL, 0, icon, name, 0, 0, w, UI_UNIT_Y, NULL, 0.0, 0.0, 0, 0, NULL);
@@ -3342,7 +3288,6 @@ void uiItemV(uiLayout *layout, const char *name, int icon, int argval)
   /* label */
   uiBlock *block = layout->root->block;
   int *retvalue = (block->handle) ? &block->handle->retvalue : NULL;
-  int w;
 
   UI_block_layout_set_current(block, layout);
 
@@ -3353,7 +3298,7 @@ void uiItemV(uiLayout *layout, const char *name, int icon, int argval)
     icon = ICON_BLANK1;
   }
 
-  w = ui_text_icon_width(layout, name, icon, 0);
+  const int w = ui_text_icon_width(layout, name, icon, 0);
 
   if (icon && name[0]) {
     uiDefIconTextButI(block,
@@ -3501,9 +3446,6 @@ void uiItemMenuEnumO_ptr(uiLayout *layout,
                          const char *name,
                          int icon)
 {
-  MenuItemLevel *lvl;
-  uiBut *but;
-
   /* Caller must check */
   BLI_assert(ot->srna != NULL);
 
@@ -3515,12 +3457,12 @@ void uiItemMenuEnumO_ptr(uiLayout *layout,
     icon = ICON_BLANK1;
   }
 
-  lvl = MEM_callocN(sizeof(MenuItemLevel), "MenuItemLevel");
+  MenuItemLevel *lvl = MEM_callocN(sizeof(MenuItemLevel), "MenuItemLevel");
   BLI_strncpy(lvl->opname, ot->idname, sizeof(lvl->opname));
   BLI_strncpy(lvl->propname, propname, sizeof(lvl->propname));
   lvl->opcontext = layout->root->opcontext;
 
-  but = ui_item_menu(layout, name, icon, menu_item_enum_opname_menu, NULL, lvl, NULL, true);
+  uiBut *but = ui_item_menu(layout, name, icon, menu_item_enum_opname_menu, NULL, lvl, NULL, true);
 
   /* add hotkey here, lower UI code can't detect it */
   if ((layout->root->block->flag & UI_BLOCK_LOOP) && (ot->prop && ot->invoke)) {
@@ -3591,9 +3533,7 @@ void uiItemMenuEnumR_prop(
 void uiItemMenuEnumR(
     uiLayout *layout, struct PointerRNA *ptr, const char *propname, const char *name, int icon)
 {
-  PropertyRNA *prop;
+  PropertyRNA *prop = RNA_struct_find_property(ptr, propname);
-
-  prop = RNA_struct_find_property(ptr, propname);
   if (!prop) {
     ui_item_disabled(layout, propname);
     RNA_warning("property not found: %s.%s", RNA_struct_identifier(ptr->type), propname);