Re: [rfa] add 'parent' field to struct die_info

[Jim Blandy <jimb@redhat.com>]

Elena Zannoni <ezannoni@redhat.com> writes:
> May I suggest to add a comment where the structure is defined that explains
> in plain English the structure/relations of the dies?

How's this?

2003-10-01  Jim Blandy  <jimb@redhat.com>

	* dwarf2read.c (struct die_info): Doc fix.

Index: gdb/dwarf2read.c
===================================================================
RCS file: /cvs/src/src/gdb/dwarf2read.c,v
retrieving revision 1.109
diff -c -c -F'^(' -r1.109 dwarf2read.c
*** gdb/dwarf2read.c	30 Sep 2003 22:29:28 -0000	1.109
--- gdb/dwarf2read.c	2 Oct 2003 04:06:12 -0000
***************
*** 320,328 ****
--- 320,335 ----
      unsigned int num_attrs;	/* Number of attributes */
      struct attribute *attrs;	/* An array of attributes */
      struct die_info *next_ref;	/* Next die in ref hash table */
+ 
+     /* The dies in a compilation unit form an n-ary tree.  PARENT
+        points to this die's parent; CHILD points to the first child of
+        this node; and all the children of a given node are chained
+        together via their SIBLING fields, terminated by a die whose
+        tag is zero.  */
      struct die_info *child;	/* Its first child, if any.  */
      struct die_info *sibling;	/* Its next sibling, if any.  */
      struct die_info *parent;	/* Its parent, if any.  */
+ 
      struct type *type;		/* Cached type information */
    };