[PATCH 05/10] Add BVAR_DEFAULT for access to buffer defaults

[Spencer Baugh]

This is more direct. This macro can stay as an lvalue even when we
change BVAR to be a function call - directly changing and accessing
buffer_defaults is always fine.
---
 src/buffer.h   | 3 +++
 src/category.h | 2 +-
 src/syntax.h   | 2 +-
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/buffer.h b/src/buffer.h
index 690593757e..0b26c56e89 100644
--- a/src/buffer.h
+++ b/src/buffer.h
@@ -284,6 +284,9 @@ struct buffer_text
 
 #define BVAR(buf, field) ((buf)->field ## _)
 
+/* Access a BVAR from buffer_defaults */
+#define BVAR_DEFAULT(field) (buffer_defaults.field ## _)
+
 /* Max number of builtin per-buffer variables.  */
 enum { MAX_PER_BUFFER_VARS = 50 };
 
diff --git a/src/category.h b/src/category.h
index cc32990478..85e872a940 100644
--- a/src/category.h
+++ b/src/category.h
@@ -94,7 +94,7 @@ CHAR_HAS_CATEGORY (int ch, int category)
 
 /* The standard category table is stored where it will automatically
    be used in all new buffers.  */
-#define Vstandard_category_table BVAR (&buffer_defaults, category_table)
+#define Vstandard_category_table BVAR_DEFAULT (category_table)
 
 /* Return the doc string of CATEGORY in category table TABLE.  */
 #define CATEGORY_DOCSTRING(table, category)                            \
diff --git a/src/syntax.h b/src/syntax.h
index a2ec3301ba..9c2bf32057 100644
--- a/src/syntax.h
+++ b/src/syntax.h
@@ -31,7 +31,7 @@ extern void update_syntax_table_forward (ptrdiff_t, bool, 
Lisp_Object);
 
 /* The standard syntax table is stored where it will automatically
    be used in all new buffers.  */
-#define Vstandard_syntax_table BVAR (&buffer_defaults, syntax_table)
+#define Vstandard_syntax_table BVAR_DEFAULT (syntax_table)
 
 /* A syntax table is a chartable whose elements are cons cells
    (CODE+FLAGS . MATCHING-CHAR).  MATCHING-CHAR can be nil if the char
-- 
2.28.0