maint: avoid "magic number exit".

[bison.git] / doc / bison.texinfo

diff --git a/doc/bison.texinfo b/doc/bison.texinfo
index 509dbed2adb9d0b7063dcb36aaa61772646543ee..329d81d0d864c16dfe1c211bb684db44c86e445c 100644 (file)
--- a/doc/bison.texinfo
+++ b/doc/bison.texinfo
@@ -33,7 +33,7 @@
 This manual (@value{UPDATED}) is for GNU Bison (version
 @value{VERSION}), the GNU parser generator.
 
-Copyright @copyright{} 1988-1993, 1995, 1998-2011 Free Software
+Copyright @copyright{} 1988-1993, 1995, 1998-2012 Free Software
 Foundation, Inc.
 
 @quotation
@@ -125,7 +125,7 @@ The Concepts of Bison
                            the name of an identifier, etc.).
 * Semantic Actions::     Each rule can have an action containing C code.
 * GLR Parsers::          Writing parsers for general context-free languages.
-* Locations Overview::   Tracking Locations.
+* Locations::            Overview of location tracking.
 * Bison Parser::         What are Bison's input and output,
                            how is the output used?
 * Stages::               Stages in writing and running Bison grammars.
@@ -449,7 +449,7 @@ use Bison or Yacc, we suggest you start by reading this chapter carefully.
                            the name of an identifier, etc.).
 * Semantic Actions::     Each rule can have an action containing C code.
 * GLR Parsers::          Writing parsers for general context-free languages.
-* Locations Overview::   Tracking Locations.
+* Locations::            Overview of location tracking.
 * Bison Parser::         What are Bison's input and output,
                            how is the output used?
 * Stages::               Stages in writing and running Bison grammars.
@@ -1205,7 +1205,7 @@ will suffice.  Otherwise, we suggest
 %@}
 @end example
 
-@node Locations Overview
+@node Locations
 @section Locations
 @cindex location
 @cindex textual location
@@ -9366,8 +9366,8 @@ calcxx_driver::scan_begin ()
     yyin = stdin;
   else if (!(yyin = fopen (file.c_str (), "r")))
     @{
-      error (std::string ("cannot open ") + file);
-      exit (1);
+      error (std::string ("cannot open ") + file + ": " + strerror(errno));
+      exit (EXIT_FAILURE);
     @}
 @}
 
@@ -10045,11 +10045,17 @@ yyparse (char const *file)
 {
   yyin = fopen (file, "r");
   if (!yyin)
-    exit (2);
+  {
+    perror ("fopen");
+    exit (EXIT_FAILURE);
+  }
   /* One token only.  */
   yylex ();
   if (fclose (yyin) != 0)
-    exit (3);
+  {
+    perror ("fclose");
+    exit (EXIT_FAILURE);
+  }
   return 0;
 }
 
@@ -10308,7 +10314,7 @@ transcript of the build session, starting with the invocation of
 send additional files as well (such as `config.h' or `config.cache').
 
 Patches are most welcome, but not required.  That is, do not hesitate to
-send a bug report just because you can not provide a fix.
+send a bug report just because you cannot provide a fix.
 
 Send bug reports to @email{bug-bison@@gnu.org}.