Merge remote-tracking branch 'origin/maint'

[bison.git] / data / lalr1.cc

diff --git a/data/lalr1.cc b/data/lalr1.cc
index cac4260b6e7b722ff3af05d0a73a4eb0d4dcc561..3294f591106d6cbe53c80c32241e1632990861b9 100644 (file)
--- a/data/lalr1.cc
+++ b/data/lalr1.cc
@@ -17,6 +17,8 @@
 
 m4_include(b4_pkgdatadir/[c++.m4])
 
 
 m4_include(b4_pkgdatadir/[c++.m4])
 

+# api.value.type=variant is valid.
+m4_define([b4_value_type_setup_variant])

 
 # b4_integral_parser_table_declare(TABLE-NAME, CONTENT, COMMENT)
 # --------------------------------------------------------------
 
 # b4_integral_parser_table_declare(TABLE-NAME, CONTENT, COMMENT)
 # --------------------------------------------------------------


@@ -38,13 +40,14 @@ m4_define([b4_integral_parser_table_define],
   };dnl
 ])
 
   };dnl
 ])
 

-

 # b4_symbol_value_template(VAL, [TYPE])
 # -------------------------------------
 # Same as b4_symbol_value, but used in a template method.  It makes
 # b4_symbol_value_template(VAL, [TYPE])
 # -------------------------------------
 # Same as b4_symbol_value, but used in a template method.  It makes

-# a difference when using variants.
+# a difference when using variants.  Note that b4_value_type_setup_union
+# overrides b4_symbol_value, so we must override it again.

 m4_copy([b4_symbol_value], [b4_symbol_value_template])
 m4_copy([b4_symbol_value], [b4_symbol_value_template])

-
+m4_append([b4_value_type_setup_union],
+          [m4_copy_force([b4_symbol_value_union], [b4_symbol_value_template])])

 
 # b4_lhs_value([TYPE])
 # --------------------
 
 # b4_lhs_value([TYPE])
 # --------------------


@@ -201,13 +204,18 @@ b4_location_define])])[
     void error (const syntax_error& err);
 
   private:
     void error (const syntax_error& err);
 
   private:

+    /// This class is not copyable.
+    ]b4_parser_class_name[ (const ]b4_parser_class_name[&);
+    ]b4_parser_class_name[& operator= (const ]b4_parser_class_name[&);
+

     /// State numbers.
     typedef int state_type;
 
     /// Generate an error message.
     /// \param yystate   the state where the error occurred.
     /// State numbers.
     typedef int state_type;
 
     /// Generate an error message.
     /// \param yystate   the state where the error occurred.

-    /// \param yytoken   the lookahead token.
-    virtual std::string yysyntax_error_ (state_type yystate, int yytoken);
+    /// \param yytoken   the lookahead token type, or yyempty_.
+    virtual std::string yysyntax_error_ (state_type yystate,
+                                         symbol_number_type yytoken) const;

 
     /// Compute post-reduction state.
     /// \param yystate   the current state
 
     /// Compute post-reduction state.
     /// \param yystate   the current state


@@ -222,13 +230,11 @@ b4_location_define])])[
     /// \param yyvalue   the value to check
     static bool yy_table_value_is_error_ (int yyvalue);
 
     /// \param yyvalue   the value to check
     static bool yy_table_value_is_error_ (int yyvalue);
 

-    /// Internal symbol numbers.
-    typedef ]b4_int_type_for([b4_translate])[ token_number_type;

     static const ]b4_int_type(b4_pact_ninf, b4_pact_ninf)[ yypact_ninf_;
     static const ]b4_int_type(b4_table_ninf, b4_table_ninf)[ yytable_ninf_;
 
     /// Convert a scanner token number \a t to a symbol number.
     static const ]b4_int_type(b4_pact_ninf, b4_pact_ninf)[ yypact_ninf_;
     static const ]b4_int_type(b4_table_ninf, b4_table_ninf)[ yytable_ninf_;
 
     /// Convert a scanner token number \a t to a symbol number.

-    static inline token_number_type yytranslate_ (]b4_token_ctor_if([token_type], [int])[ t);
+    static token_number_type yytranslate_ (]b4_token_ctor_if([token_type], [int])[ t);

 
     // Tables.
 ]b4_parser_tables_declare[]b4_error_verbose_if([
 
     // Tables.
 ]b4_parser_tables_declare[]b4_error_verbose_if([


@@ -255,8 +261,7 @@ b4_location_define])])[
     /// \param yyo    The output stream.
     /// \param yysym  The symbol.
     template <typename Base>
     /// \param yyo    The output stream.
     /// \param yysym  The symbol.
     template <typename Base>

-    void yy_print_ (std::ostream& yyo,
-                    const basic_symbol<Base>& yysym) const;
+    void yy_print_ (std::ostream& yyo, const basic_symbol<Base>& yysym) const;

 #endif
 
     /// \brief Reclaim the memory associated to a symbol.
 #endif
 
     /// \brief Reclaim the memory associated to a symbol.


@@ -264,38 +269,35 @@ b4_location_define])])[
     ///                  If null, print nothing.
     /// \param s         The symbol.
     template <typename Base>
     ///                  If null, print nothing.
     /// \param s         The symbol.
     template <typename Base>

-    inline void yy_destroy_ (const char* yymsg,
-                             basic_symbol<Base>& yysym) const;
+    void yy_destroy_ (const char* yymsg, basic_symbol<Base>& yysym) const;

 
   private:
     /// Type access provider for state based symbols.
     struct by_state
     {
       /// Default constructor.
 
   private:
     /// Type access provider for state based symbols.
     struct by_state
     {
       /// Default constructor.

-      inline by_state ();
+      by_state ();
+
+      /// The symbol type as needed by the constructor.
+      typedef state_type kind_type;

 
       /// Constructor.
 
       /// Constructor.

-      inline by_state (state_type s);
+      by_state (kind_type s);

 
       /// Copy constructor.
 
       /// Copy constructor.

-      inline by_state (const by_state& other);
+      by_state (const by_state& other);

 
 

-      void move (by_state& that)
-      {
-        state = that.state;
-        that.state = -1;
-      }
+      /// Steal the symbol type from \a that.
+      void move (by_state& that);

 
 

-      /// The state.
-      state_type state;
+      /// The (internal) type number (corresponding to \a state).
+      /// "empty" when empty.
+      symbol_number_type type_get () const;

 
 

-      /// The type (corresponding to \a state).
-      ///
-      /// -1 when empty.
-      inline int type_get () const;
+      enum { empty = 0 };

 
 

-      /// The type used to store the symbol type.
-      typedef state_type value_type;
+      /// The state.
+      state_type state;

     };
 
     /// "Internal" symbol: element of the stack.
     };
 
     /// "Internal" symbol: element of the stack.


@@ -322,7 +324,7 @@ b4_location_define])])[
     ///             if null, no trace is output.
     /// \param s    the symbol
     /// \warning the contents of \a s.value is stolen.
     ///             if null, no trace is output.
     /// \param s    the symbol
     /// \warning the contents of \a s.value is stolen.

-    inline void yypush_ (const char* m, stack_symbol_type& s);
+    void yypush_ (const char* m, stack_symbol_type& s);

 
     /// Push a new look ahead token on the state on the stack.
     /// \param m    a debug message to display
 
     /// Push a new look ahead token on the state on the stack.
     /// \param m    a debug message to display


@@ -330,10 +332,10 @@ b4_location_define])])[
     /// \param s    the state
     /// \param sym  the symbol (for its value and location).
     /// \warning the contents of \a s.value is stolen.
     /// \param s    the state
     /// \param sym  the symbol (for its value and location).
     /// \warning the contents of \a s.value is stolen.

-    inline void yypush_ (const char* m, state_type s, symbol_type& sym);
+    void yypush_ (const char* m, state_type s, symbol_type& sym);

 
     /// Pop \a n symbols the three stacks.
 
     /// Pop \a n symbols the three stacks.

-    inline void yypop_ (unsigned int n = 1);
+    void yypop_ (unsigned int n = 1);

 
     // Constants.
     enum
 
     // Constants.
     enum


@@ -528,22 +530,34 @@ m4_if(b4_prefix, [yy], [],
 ]b4_token_ctor_if([], [b4_public_types_define])[
 
   // by_state.
 ]b4_token_ctor_if([], [b4_public_types_define])[
 
   // by_state.

+  inline

   ]b4_parser_class_name[::by_state::by_state ()
   ]b4_parser_class_name[::by_state::by_state ()

-    : state (-1)
+    : state (empty)

   {}
 
   {}
 

+  inline

   ]b4_parser_class_name[::by_state::by_state (const by_state& other)
     : state (other.state)
   {}
 
   ]b4_parser_class_name[::by_state::by_state (const by_state& other)
     : state (other.state)
   {}
 

+  inline
+  void
+  ]b4_parser_class_name[::by_state::move (by_state& that)
+  {
+    state = that.state;
+    that.state = empty;
+  }
+
+  inline

   ]b4_parser_class_name[::by_state::by_state (state_type s)
     : state (s)
   {}
 
   ]b4_parser_class_name[::by_state::by_state (state_type s)
     : state (s)
   {}
 

-  int
+  inline
+  ]b4_parser_class_name[::symbol_number_type

   ]b4_parser_class_name[::by_state::type_get () const
   {
   ]b4_parser_class_name[::by_state::type_get () const
   {

-    return state == -1 ? -1 : yystos_[state];
+    return state == empty ? 0 : yystos_[state];

   }
 
   inline
   }
 
   inline


@@ -552,28 +566,31 @@ m4_if(b4_prefix, [yy], [],
 
 
   inline
 
 
   inline

-  ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type (state_type s, symbol_type& sym)
-    : super_type (s]b4_locations_if([, sym.location])[)
-  {]b4_variant_if([[
-    ]b4_symbol_variant([sym.type_get ()], [value], [move], [sym.value])],
-    [value = sym.value;])[
-    // sym is emptied.
-    sym.type = -1;
+  ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type (state_type s, symbol_type& that)
+    : super_type (s]b4_locations_if([, that.location])[)
+  {
+    ]b4_variant_if([b4_symbol_variant([that.type_get ()],
+                                      [value], [move], [that.value])],
+                   [[value = that.value;]])[
+    // that is emptied.
+    that.type = empty;

   }
 
   inline
   ]b4_parser_class_name[::stack_symbol_type&
   ]b4_parser_class_name[::stack_symbol_type::operator= (const stack_symbol_type& that)
   {
   }
 
   inline
   ]b4_parser_class_name[::stack_symbol_type&
   ]b4_parser_class_name[::stack_symbol_type::operator= (const stack_symbol_type& that)
   {

-    state = that.state;]b4_variant_if([[
-    ]b4_symbol_variant([that.type_get ()], [value], [copy], [that.value])],
-    [value = that.value;])[]b4_locations_if([
+    state = that.state;
+    ]b4_variant_if([b4_symbol_variant([that.type_get ()],
+                                      [value], [copy], [that.value])],
+                   [[value = that.value;]])[]b4_locations_if([

     location = that.location;])[
     return *this;
   }
 
 
   template <typename Base>
     location = that.location;])[
     return *this;
   }
 
 
   template <typename Base>

+  inline

   void
   ]b4_parser_class_name[::yy_destroy_ (const char* yymsg, basic_symbol<Base>& yysym) const
   {
   void
   ]b4_parser_class_name[::yy_destroy_ (const char* yymsg, basic_symbol<Base>& yysym) const
   {


@@ -581,13 +598,7 @@ m4_if(b4_prefix, [yy], [],
       YY_SYMBOL_PRINT (yymsg, yysym);]b4_variant_if([], [
 
     // User destructor.
       YY_SYMBOL_PRINT (yymsg, yysym);]b4_variant_if([], [
 
     // User destructor.

-    int yytype = yysym.type_get ();
-    switch (yytype)
-      {
-]b4_symbol_foreach([b4_symbol_destructor])dnl
-[       default:
-          break;
-      }])[
+    b4_symbol_actions([destructor], [yysym.type_get ()])])[

   }
 
 #if ]b4_api_PREFIX[DEBUG
   }
 
 #if ]b4_api_PREFIX[DEBUG


@@ -598,20 +609,16 @@ m4_if(b4_prefix, [yy], [],
   {
     std::ostream& yyoutput = yyo;
     YYUSE (yyoutput);
   {
     std::ostream& yyoutput = yyo;
     YYUSE (yyoutput);

-    int yytype = yysym.type_get ();
+    symbol_number_type yytype = yysym.type_get ();

     yyo << (yytype < yyntokens_ ? "token" : "nterm")
         << ' ' << yytname_[yytype] << " ("]b4_locations_if([
         << yysym.location << ": "])[;
     yyo << (yytype < yyntokens_ ? "token" : "nterm")
         << ' ' << yytname_[yytype] << " ("]b4_locations_if([
         << yysym.location << ": "])[;

-    switch (yytype)
-      {
-]b4_symbol_foreach([b4_symbol_printer])dnl
-[       default:
-          break;
-      }
+    ]b4_symbol_actions([printer])[

     yyo << ')';
   }
 #endif
 
     yyo << ')';
   }
 #endif
 

+  inline

   void
   ]b4_parser_class_name[::yypush_ (const char* m, state_type s, symbol_type& sym)
   {
   void
   ]b4_parser_class_name[::yypush_ (const char* m, state_type s, symbol_type& sym)
   {


@@ -619,6 +626,7 @@ m4_if(b4_prefix, [yy], [],
     yypush_ (m, t);
   }
 
     yypush_ (m, t);
   }
 

+  inline

   void
   ]b4_parser_class_name[::yypush_ (const char* m, stack_symbol_type& s)
   {
   void
   ]b4_parser_class_name[::yypush_ (const char* m, stack_symbol_type& s)
   {


@@ -627,6 +635,7 @@ m4_if(b4_prefix, [yy], [],
     yystack_.push (s);
   }
 
     yystack_.push (s);
   }
 

+  inline

   void
   ]b4_parser_class_name[::yypop_ (unsigned int n)
   {
   void
   ]b4_parser_class_name[::yypop_ (unsigned int n)
   {


@@ -724,7 +733,7 @@ b4_dollar_popdef])[]dnl
        yynewstate, since the latter expects the semantical and the
        location values to have been already stored, initialize these
        stacks with a primary value.  */
        yynewstate, since the latter expects the semantical and the
        location values to have been already stored, initialize these
        stacks with a primary value.  */

-    yystack_ = stack_type (0);
+    yystack_.clear ();

     yypush_ (YY_NULL, 0, yyla);
 
     // A new symbol was pushed on the stack.
     yypush_ (YY_NULL, 0, yyla);
 
     // A new symbol was pushed on the stack.


@@ -766,8 +775,8 @@ b4_dollar_popdef])[]dnl
 
     /* If the proper action on seeing token YYLA.TYPE is to reduce or
        to detect an error, take that action.  */
 
     /* If the proper action on seeing token YYLA.TYPE is to reduce or
        to detect an error, take that action.  */

-    yyn += yyla.type;
-    if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yyla.type)
+    yyn += yyla.type_get ();
+    if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yyla.type_get ())

       goto yydefault;
 
     // Reduce or error.
       goto yydefault;
 
     // Reduce or error.


@@ -811,7 +820,7 @@ b4_dollar_popdef])[]dnl
        variants.  */
     b4_symbol_variant([[yyr1_@{yyn@}]], [yylhs.value], [build])],[
     /* If YYLEN is nonzero, implement the default value of the action:
        variants.  */
     b4_symbol_variant([[yyr1_@{yyn@}]], [yylhs.value], [build])],[
     /* If YYLEN is nonzero, implement the default value of the action:

-       `$$ = $1'.  Otherwise, use the top of the stack.
+       '$$ = $1'.  Otherwise, use the top of the stack.

 
        Otherwise, the following line sets YYLHS.VALUE to garbage.
        This behavior is undocumented and Bison
 
        Otherwise, the following line sets YYLHS.VALUE to garbage.
        This behavior is undocumented and Bison


@@ -863,7 +872,7 @@ b4_dollar_popdef])[]dnl
         ++yynerrs_;
         error (]b4_join(b4_locations_if([yyla.location]),
                         [[yysyntax_error_ (yystack_[0].state,
         ++yynerrs_;
         error (]b4_join(b4_locations_if([yyla.location]),
                         [[yysyntax_error_ (yystack_[0].state,

-                                           yyempty ? yyempty_ : yyla.type)]])[);
+                                           yyempty ? yyempty_ : yyla.type_get ())]])[);

       }
 
 ]b4_locations_if([[
       }
 
 ]b4_locations_if([[


@@ -874,7 +883,7 @@ b4_dollar_popdef])[]dnl
            error, discard it.  */
 
         // Return failure if at end of input.
            error, discard it.  */
 
         // Return failure if at end of input.

-        if (yyla.type == yyeof_)
+        if (yyla.type_get () == yyeof_)

           YYABORT;
         else if (!yyempty)
           {
           YYABORT;
         else if (!yyempty)
           {


@@ -1000,8 +1009,8 @@ b4_dollar_popdef])[]dnl
   // Generate an error message.
   std::string
   ]b4_parser_class_name[::yysyntax_error_ (]dnl
   // Generate an error message.
   std::string
   ]b4_parser_class_name[::yysyntax_error_ (]dnl

-b4_error_verbose_if([state_type yystate, int yytoken],
-                    [int, int])[)
+b4_error_verbose_if([state_type yystate, symbol_number_type yytoken],
+                    [state_type, symbol_number_type])[) const

   {]b4_error_verbose_if([[
     std::string yyres;
     // Number of reported tokens (one for the "unexpected", one per
   {]b4_error_verbose_if([[
     std::string yyres;
     // Number of reported tokens (one for the "unexpected", one per