doc: %initial-action to initialize yylloc.

Reported by Bill Allombert.
	* doc/bison.texinfo: Set fill-column to 76.
	(Location Type): Document the use of %initial-action to initialize
	yylloc.

(cherry picked from commit d59e456dbf)

ChangeLog

@@ -1,3 +1,11 @@
+2009-08-19  Akim Demaille  <demaille@gostai.com>
+
+	doc: %initial-action to initialize yylloc.
+	Reported by Bill Allombert.
+	* doc/bison.texinfo: Set fill-column to 76.
+	(Location Type): Document the use of %initial-action to initialize
+	yylloc.
+
 2009-08-18  Joel E. Denny  <jdenny@clemson.edu>
 
 	maint: update for gnulib's recent update-copyright changes

THANKS

@@ -14,6 +14,7 @@ Art Haas                  ahaas@neosoft.com
 Baron Schwartz            baron@sequent.org
 Benoit Perrot             benoit.perrot@epita.fr
 Bert Deknuydt             Bert.Deknuydt@esat.kuleuven.ac.be
+Bill Allombert            Bill.Allombert@math.u-bordeaux1.fr
 Bob Rossi                 bob@brasko.net
 Brandon Lucia             blucia@gmail.com
 Bruce Lilly               blilly@erols.com

doc/bison.texinfo

@@ -3800,8 +3800,11 @@ typedef struct YYLTYPE
 @} YYLTYPE;
 @end example
 
-At the beginning of the parsing, Bison initializes all these fields to 1
-for @code{yylloc}.
+When @code{YYLTYPE} is not defined, at the beginning of the parsing, Bison
+initializes all these fields to 1 for @code{yylloc}.  To initialize
+@code{yylloc} with a custom location type (or to chose a different
+initialization), use the @code{%initial-action} directive.  @xref{Initial
+Action Decl, , Performing Actions before Parsing}.
 
 @node Actions and Locations
 @subsection Actions and Locations
@@ -10339,6 +10342,10 @@ grammatically indivisible.  The piece of text it represents is a token.
 
 @bye
 
+@c Local Variables:
+@c fill-column: 76
+@c End:
+
 @c LocalWords: texinfo setfilename settitle setchapternewpage finalout
 @c LocalWords: ifinfo smallbook shorttitlepage titlepage GPL FIXME iftex
 @c LocalWords: akim fn cp syncodeindex vr tp synindex dircategory direntry