* src/location.h (boundary): Note that a line or column equal

[bison.git] / data / lalr1.cc

diff --git a/data/lalr1.cc b/data/lalr1.cc
index bcc6080f4acb54864bcd70ca76745dace4b2dd9c..94fc91831ac308dc5f65af4d3cd550b75e9bab78 100644 (file)
--- a/data/lalr1.cc
+++ b/data/lalr1.cc
@@ -33,6 +33,8 @@ b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison],
              [2002, 2003, 2004, 2005])
 dnl FIXME: This is wrong, we want computed header guards.
 [
+/* C++ LALR(1) parser skeleton written by Akim Demaille.  */
+
 #ifndef PARSER_HEADER_H
 # define PARSER_HEADER_H
 
@@ -151,13 +153,20 @@ b4_syncline([@oline@], [@ofile@])],
 b4_error_verbose_if([, int tok])[);
 
 #if YYDEBUG
+    /// \brief Report a symbol value on the debug stream.
+    /// \param yytype       The token type.
+    /// \param yyvaluep     Its semantic value.
+    /// \param yylocationp  Its location.
+    virtual void yy_symbol_value_print_ (int yytype,
+                                        const semantic_type* yyvaluep,
+                                        const location_type* yylocationp);
     /// \brief Report a symbol on the debug stream.
     /// \param yytype       The token type.
     /// \param yyvaluep     Its semantic value.
     /// \param yylocationp  Its location.
-    virtual void yysymprint_ (int yytype,
-                             const semantic_type* yyvaluep,
-                             const location_type* yylocationp);
+    virtual void yy_symbol_print_ (int yytype,
+                                  const semantic_type* yyvaluep,
+                                  const location_type* yylocationp);
 #endif /* ! YYDEBUG */
 
 
@@ -278,7 +287,7 @@ b4_error_verbose_if([, int tok])[);
 [b4_token_defines(b4_tokens)
 
 #ifndef YYSTYPE
- /* Redirection for backward compatibility. */
+ /* Redirection for backward compatibility.  */
 # define YYSTYPE yy::b4_parser_class_name::semantic_type
 #endif
 ])[
@@ -314,9 +323,9 @@ b4_syncline([@oline@], [@ofile@])[
 #endif
 
 /* Suppress unused-variable warnings by "using" E.  */
-#define YYUSE(e) do {;} while (false && (e))
+#define YYUSE(e) ((void) (e))
 
-/* A pseudo ostream that takes yydebug_ into account. */
+/* A pseudo ostream that takes yydebug_ into account.  */
 # define YYCDEBUG                                                      \
   for (bool yydebugcond_ = yydebug_; yydebugcond_; yydebugcond_ = false)       \
     (*yycdebug_)
@@ -329,7 +338,7 @@ do {                                                        \
   if (yydebug_)                                                \
     {                                                  \
       *yycdebug_ << Title << ' ';                      \
-      yysymprint_ ((Type), (Value), (Location));       \
+      yy_symbol_print_ ((Type), (Value), (Location));  \
       *yycdebug_ << std::endl;                         \
     }                                                  \
 } while (false)
@@ -417,26 +426,29 @@ namespace yy
   | Print this symbol on YYOUTPUT.  |
   `--------------------------------*/
 
-  void
-  ]b4_parser_class_name[::yysymprint_ (int yytype,
+  inline void
+  ]b4_parser_class_name[::yy_symbol_value_print_ (int yytype,
                            const semantic_type* yyvaluep, const location_type* yylocationp)
   {
-    /* Backward compatibility, but should be removed eventually. */
-    std::ostream& cdebug_ = *yycdebug_;
-
-    YYUSE (!&cdebug_);
     YYUSE (yylocationp);
     YYUSE (yyvaluep);
-
-    *yycdebug_ << (yytype < yyntokens_ ? "token" : "nterm")
-            << ' ' << yytname_[yytype] << " ("
-               << *yylocationp << ": ";
     switch (yytype)
       {
   ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
 [       default:
           break;
       }
+  }
+
+
+  void
+  ]b4_parser_class_name[::yy_symbol_print_ (int yytype,
+                           const semantic_type* yyvaluep, const location_type* yylocationp)
+  {
+    *yycdebug_ << (yytype < yyntokens_ ? "token" : "nterm")
+              << ' ' << yytname_[yytype] << " ("
+               << *yylocationp << ": ";
+    yy_symbol_value_print_ (yytype, yyvaluep, yylocationp);
     *yycdebug_ << ')';
   }
 #endif /* ! YYDEBUG */
@@ -502,10 +514,10 @@ namespace yy
 
     /* State.  */
     int yyn;
-    int yylen;
+    int yylen = 0;
     int yystate = 0;
 
-    /* Error handling. */
+    /* Error handling.  */
     int yynerrs_ = 0;
     int yyerrstatus_ = 0;
 
@@ -528,7 +540,7 @@ namespace yy
 ]m4_ifdef([b4_initial_action], [
 m4_pushdef([b4_at_dollar],     [yylloc])dnl
 m4_pushdef([b4_dollar_dollar], [yylval])dnl
-    /* User initialization code. */
+    /* User initialization code.  */
     b4_initial_action
 m4_popdef([b4_dollar_dollar])dnl
 m4_popdef([b4_at_dollar])dnl
@@ -634,7 +646,7 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param))[;
   `-----------------------------*/
   yyreduce:
     yylen = yyr2_[yyn];
-    /* If LEN_ is nonzero, implement the default value of the action:
+    /* If YYLEN is nonzero, implement the default value of the action:
        `$$ = $1'.  Otherwise, use the top of the stack.
 
        Otherwise, the following line sets YYVAL to garbage.
@@ -652,15 +664,15 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param))[;
     YY_REDUCE_PRINT (yyn);
     switch (yyn)
       {
-        ]b4_actions[
+        ]b4_actions
+    /* Line __line__ of lalr1.cc.  */
+b4_syncline([@oline@], [@ofile@])[
         default: break;
       }
     YY_SYMBOL_PRINT ("-> $$ =", yyr1_[yyn], &yyval, &yyloc);
-    /* Line __line__ of lalr1.cc.  */
-]b4_syncline([@oline@], [@ofile@])[
 
     yypop_ (yylen);
-
+    yylen = 0;
     YY_STACK_PRINT ();
 
     yysemantic_stack_.push (yyval);
@@ -724,7 +736,10 @@ b4_error_verbose_if([, yytoken])[));
       goto yyerrorlab;
 
     yyerror_range[0] = yylocation_stack_[yylen - 1];
+    /* Do not reclaim the symbols of the rule which action triggered
+       this YYERROR.  */
     yypop_ (yylen);
+    yylen = 0;
     yystate = yystate_stack_[0];
     goto yyerrlab1;
 
@@ -771,7 +786,7 @@ b4_error_verbose_if([, yytoken])[));
     yysemantic_stack_.push (yylval);
     yylocation_stack_.push (yyloc);
 
-    /* Shift the error token. */
+    /* Shift the error token.  */
     YY_SYMBOL_PRINT ("Shifting", yystos_[yyn],
                   &yysemantic_stack_[0], &yylocation_stack_[0]);
 
@@ -792,6 +807,9 @@ b4_error_verbose_if([, yytoken])[));
     if (yychar != yyeof_ && yychar != yyempty_)
       yydestruct_ ("Cleanup: discarding lookahead", yytoken, &yylval, &yylloc);
 
+    /* Do not reclaim the symbols of the rule which action triggered
+       this YYABORT or YYACCEPT.  */
+    yypop_ (yylen);
     while (yystate_stack_.height () != 1)
       {
         yydestruct_ ("Cleanup: popping",
@@ -937,7 +955,7 @@ b4_error_verbose_if([, int tok])[)
 
 #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
   /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
-     First, the terminals, then, starting at \a yyntokens_, nonterminals. */
+     First, the terminals, then, starting at \a yyntokens_, nonterminals.  */
   const char*
   const ]b4_parser_class_name[::yytname_[] =
   {
@@ -946,7 +964,7 @@ b4_error_verbose_if([, int tok])[)
 #endif
 
 #if YYDEBUG
-  /* YYRHS -- A `-1'-separated list of the rules' RHS. */
+  /* YYRHS -- A `-1'-separated list of the rules' RHS.  */
   const ]b4_parser_class_name[::rhs_number_type
   ]b4_parser_class_name[::yyrhs_[] =
   {