[PATCH 3/4] gdb: add type::is_flag_enum / type::set_is_flag_enum

[Simon Marchi <simon.marchi@efficios.com>]

Add the `is_flag_enum` and `set_is_flag_enum` methods on `struct type`,
in order to remove the `TYPE_FLAG_ENUM` macro.  In this patch, the macro
is changed to use the getter, so all the call sites of the macro that
are used as a setter are changed to use the setter method directly.  The
next patch will remove the macro completely.

gdb/ChangeLog:

	* gdbtypes.h (struct type) <is_flag_enum,
	set_is_flag_enum>: New methods.
	(TYPE_FLAG_ENUM): Use type::is_flag_enum, change all
	write call sites to use type::set_is_flag_enum.

Change-Id: I9c56c91626c8d784947ba94fcb97818526b81d1c
---
 gdb/dwarf2/read.c |  2 +-
 gdb/gdbtypes.h    | 22 ++++++++++++++++------
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index 774fe14914e..be364bfed83 100644
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -16675,7 +16675,7 @@ update_enumeration_type_from_children (struct die_info *die,
     type->set_is_unsigned (true);
 
   if (flag_enum)
-    TYPE_FLAG_ENUM (type) = 1;
+    type->set_is_flag_enum (true);
 }
 
 /* Given a DW_AT_enumeration_type die, set its type.  We do not
diff --git a/gdb/gdbtypes.h b/gdb/gdbtypes.h
index 9677d068ee1..52c17532692 100644
--- a/gdb/gdbtypes.h
+++ b/gdb/gdbtypes.h
@@ -220,11 +220,7 @@ DEF_ENUM_FLAGS_TYPE (enum type_instance_flag_value, type_instance_flags);
 
 #define TYPE_NOTTEXT(t)	(((t)->instance_flags ()) & TYPE_INSTANCE_FLAG_NOTTEXT)
 
-/* * True if this type is a "flag" enum.  A flag enum is one where all
-   the values are pairwise disjoint when "and"ed together.  This
-   affects how enum values are printed.  */
-
-#define TYPE_FLAG_ENUM(t) (TYPE_MAIN_TYPE (t)->flag_flag_enum)
+#define TYPE_FLAG_ENUM(t) ((t)->is_flag_enum ())
 
 /* * Constant type.  If this is set, the corresponding type has a
    const modifier.  */
@@ -812,7 +808,7 @@ struct main_type
   /* * True if this is an enum type with disjoint values.  This
      affects how the enum is printed.  */
 
-  unsigned int flag_flag_enum : 1;
+  unsigned int m_flag_flag_enum : 1;
 
   /* * A discriminant telling us which field of the type_specific
      union is being used for this type, if any.  */
@@ -1196,6 +1192,20 @@ struct type
     this->main_type->m_flag_declared_class = is_declared_class;
   }
 
+  /* True if this type is a "flag" enum.  A flag enum is one where all
+     the values are pairwise disjoint when "and"ed together.  This
+     affects how enum values are printed.  */
+
+  bool is_flag_enum () const
+  {
+    return this->main_type->m_flag_flag_enum;
+  }
+
+  void set_is_flag_enum (bool is_flag_enum)
+  {
+    this->main_type->m_flag_flag_enum = is_flag_enum;
+  }
+
   /* * Assuming that THIS is a TYPE_CODE_FIXED_POINT, return a reference
      to this type's fixed_point_info.  */
 
-- 
2.30.0