* NEWS: Document when yyparse started to return 2.

* doc/bison.texinfo (Parser Function): Document when yyparse
returns 2.

* data/lalr1.cc: Revert part of previous change, as it's incompatible.
(b4_filename_type): Renamed back from b4_file_name_type.  All uses
changed.
(class position): file_name -> filename (reverting).  All uses changed.

ChangeLog

@@ -1,3 +1,20 @@
+2005-09-15  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* NEWS: Document when yyparse started to return 2.
+	* doc/bison.texinfo (Parser Function): Document when yyparse
+	returns 2.
+
+	* data/lalr1.cc: Revert part of previous change, as it's incompatible.
+	(b4_filename_type): Renamed back from b4_file_name_type.  All uses
+	changed.
+	(class position): file_name -> filename (reverting).  All uses changed.
+
+2005-09-14  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* examples/calc++/Makefile.am ($(calc_sources_generated)): Don't
+	do anything if $@ exists.  This reverts part of the 2005-07-07
+	patch.
+
 2005-09-11  Paul Eggert  <eggert@cs.ucla.edu>
 
 	* Makefile.am (EXTRA_DIST): Do not distribute REFERENCES; it

NEWS

@@ -428,6 +428,8 @@ Changes in version 1.31, 2002-01-14:
   alloca is used only when compiled with GCC, to avoid portability
   problems as on AIX.
 
+* yyparse now returns 2 if memory is exhausted; formerly it dumped core.
+
 * When the generated parser lacks debugging code, YYDEBUG is now 0
   (as POSIX requires) instead of being undefined.
 

data/lalr1.cc

@@ -48,7 +48,7 @@ m4_define([b4_rhs_value],
 [(yysemantic_stack_@{m4_eval([$1 - $2])@}m4_ifval([$3], [.$3]))])
 
 m4_define_default([b4_location_type], [location])
-m4_define_default([b4_file_name_type], [std::string])
+m4_define_default([b4_filename_type], [std::string])
 
 # b4_lhs_location()
 # -----------------
@@ -1256,7 +1256,7 @@ namespace yy
   public:
     /// Construct a position.
     position () :
-      file_name (0),
+      filename (0),
       line (initial_line),
       column (initial_column)
     {
@@ -1288,7 +1288,7 @@ namespace yy
 
   public:
     /// File name to which this position refers.
-    ]b4_file_name_type[* file_name;
+    ]b4_filename_type[* filename;
     /// Current line number.
     unsigned int line;
     /// Current column number.
@@ -1332,8 +1332,8 @@ namespace yy
   inline std::ostream&
   operator<< (std::ostream& ostr, const position& pos)
   {
-    if (pos.file_name)
+    if (pos.filename)
-      ostr << *pos.file_name << ':';
+      ostr << *pos.filename << ':';
     return ostr << pos.line << '.' << pos.column;
   }
 
@@ -1435,9 +1435,9 @@ namespace yy
   {
     position last = loc.end - 1;
     ostr << loc.begin;
-    if (last.file_name
+    if (last.filename
-	&& (!loc.begin.file_name
+	&& (!loc.begin.filename
-	    || *loc.begin.file_name != *last.file_name))
+	    || *loc.begin.filename != *last.filename))
       ostr << '-' << last;
     else if (loc.begin.line != last.line)
       ostr << '-' << last.line  << '.' << last.column;

doc/bison.texinfo

@@ -3782,8 +3782,7 @@ For instance, if your locations use a file name, you may use
 %parse-param @{ char const *file_name @};
 %initial-action
 @{
-  @@$.begin.file_name = @@$.end.file_name = file_name;
+  @@$.begin.filename = @@$.end.filename = file_name;
-  @@$.begin.file_name = @@$.end.file_name = file_name;
 @};
 @end example
 
@@ -4272,7 +4271,11 @@ without reading further.
 The value returned by @code{yyparse} is 0 if parsing was successful (return
 is due to end-of-input).
 
-The value is 1 if parsing failed (return is due to a syntax error).
+The value is 1 if parsing failed because of invalid input, i.e., input
+that contains a syntax error or that causes @code{YYABORT} to be
+invoked.
+
+The value is 2 if parsing failed due to memory exhaustion.
 @end deftypefun
 
 In an action, you can cause immediate return from @code{yyparse} by using
@@ -6951,7 +6954,7 @@ Symbols}.
 @c - %locations
 @c - class Position
 @c - class Location
-@c - %define "file_name_type" "const symbol::Symbol"
+@c - %define "filename_type" "const symbol::Symbol"
 
 When the directive @code{%locations} is used, the C++ parser supports
 location tracking, see @ref{Locations, , Locations Overview}.  Two
@@ -6963,7 +6966,7 @@ and a @code{location}, a range composed of a pair of
 The name of the file.  It will always be handled as a pointer, the
 parser will never duplicate nor deallocate it.  As an experimental
 feature you may change it to @samp{@var{type}*} using @samp{%define
-"file_name_type" "@var{type}"}.
+"filename_type" "@var{type}"}.
 @end deftypemethod
 
 @deftypemethod {position} {unsigned int} line
@@ -7323,7 +7326,7 @@ automatically propagated.
 %initial-action
 @{
   // Initialize the initial location.
-  @@$.begin.file_name = @@$.end.file_name = &driver.file;
+  @@$.begin.filename = @@$.end.filename = &driver.file;
 @};
 @end example