graph: minor simplification

[bison.git] / data / glr.cc

diff --git a/data/glr.cc b/data/glr.cc
index 117c7148a5d1fdc879580e7fcb6b8624bc207745..8b9bf02f2bc16a6f6210c2fce1a1492e7e85ab09 100644 (file)
--- a/data/glr.cc
+++ b/data/glr.cc
@@ -43,17 +43,11 @@
 #   user must initialize the first positions (in particular the
 #   filename member).
 
 #   user must initialize the first positions (in particular the
 #   filename member).
 

-# We require a pure interface using locations.
-m4_define([b4_percent_define(locations)], [])
+# We require a pure interface.

 m4_define([b4_pure_flag],      [1])
 
 m4_define([b4_pure_flag],      [1])
 

-# The header is mandatory.
-b4_defines_if([],
-              [b4_fatal([b4_skeleton[: using %%defines is mandatory]])])
-

 m4_include(b4_pkgdatadir/[c++.m4])
 m4_include(b4_pkgdatadir/[c++.m4])

-b4_percent_define_ifdef([[location_type]], [],
-                        [m4_include(b4_pkgdatadir/[location.cc])])
+b4_bison_locations_if([m4_include(b4_pkgdatadir/[location.cc])])

 
 m4_define([b4_parser_class_name],
           [b4_percent_define_get([[parser_class_name]])])
 
 m4_define([b4_parser_class_name],
           [b4_percent_define_get([[parser_class_name]])])


@@ -61,71 +55,90 @@ m4_define([b4_parser_class_name],
 # Save the parse parameters.
 m4_define([b4_parse_param_orig], m4_defn([b4_parse_param]))
 
 # Save the parse parameters.
 m4_define([b4_parse_param_orig], m4_defn([b4_parse_param]))
 

+# b4_parse_param_wrap
+# -------------------
+# New ones.
+m4_ifset([b4_parse_param],
+[m4_define([b4_parse_param_wrap],
+           [[b4_namespace_ref::b4_parser_class_name[& yyparser], [[yyparser]]],]
+m4_defn([b4_parse_param]))],
+[m4_define([b4_parse_param_wrap],
+           [[b4_namespace_ref::b4_parser_class_name[& yyparser], [[yyparser]]]])
+])
+

 
 

-# b4_yy_symbol_print_generate
-# ---------------------------
+# b4_yy_symbol_print_define
+# -------------------------

 # Bypass the default implementation to generate the "yy_symbol_print"
 # and "yy_symbol_value_print" functions.
 # Bypass the default implementation to generate the "yy_symbol_print"
 # and "yy_symbol_value_print" functions.

-m4_define([b4_yy_symbol_print_generate],
+m4_define([b4_yy_symbol_print_define],

 [[
 /*--------------------.
 | Print this symbol.  |
 `--------------------*/
 
 [[
 /*--------------------.
 | Print this symbol.  |
 `--------------------*/
 

-]b4_c_ansi_function_def([yy_symbol_print],
+]b4_function_define([yy_symbol_print],

     [static void],
     [static void],

-    [[FILE *],               []],
-    [[int yytype],           [yytype]],
-    [[const b4_namespace_ref::b4_parser_class_name::semantic_type *yyvaluep],
-                             [yyvaluep]],
-    [[const b4_namespace_ref::b4_parser_class_name::location_type *yylocationp],
-                             [yylocationp]],
+    [[FILE *],      []],
+    [[int yytype],  [yytype]],
+    [[const ]b4_namespace_ref::b4_parser_class_name[::semantic_type *yyvaluep],
+                    [yyvaluep]][]dnl
+b4_locations_if([,
+    [[const ]b4_namespace_ref::b4_parser_class_name[::location_type *yylocationp],
+                    [yylocationp]]]),

     b4_parse_param)[
 {
 ]b4_parse_param_use[]dnl
 [  yyparser.yy_symbol_print_ (yytype, yyvaluep]b4_locations_if([, yylocationp])[);
 }
     b4_parse_param)[
 {
 ]b4_parse_param_use[]dnl
 [  yyparser.yy_symbol_print_ (yytype, yyvaluep]b4_locations_if([, yylocationp])[);
 }

-]])
+]])[

 
 

+# Hijack the initial action to initialize the locations.
+]b4_bison_locations_if([m4_define([b4_initial_action],
+[yylloc.initialize ();]m4_ifdef([b4_initial_action], [
+m4_defn([b4_initial_action])]))])[

 
 

-# Declare yyerror.
-m4_append([b4_post_prologue],
-[b4_syncline([@oline@], [@ofile@])
-
-b4_c_ansi_function_decl([yyerror],
-    [static void],
-    [[const b4_namespace_ref::b4_parser_class_name::location_type *yylocationp],
-                        [yylocationp]],
+# Hijack the post prologue to insert early definition of YYLLOC_DEFAULT
+# and declaration of yyerror.
+]m4_append([b4_post_prologue],
+[b4_syncline([@oline@], [@ofile@])[
+]b4_yylloc_default_define[
+#define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc)
+]b4_function_declare([yyerror],
+    [static void],b4_locations_if([
+    [[const ]b4_namespace_ref::b4_parser_class_name[::location_type *yylocationp],
+                        [yylocationp]],])

     b4_parse_param,
     [[const char* msg], [msg]])])
 
 
     b4_parse_param,
     [[const char* msg], [msg]])])
 
 

-# Define yyerror.
+# Hijack the epilogue to define implementations (yyerror, parser member
+# functions etc.).

 m4_append([b4_epilogue],
 [b4_syncline([@oline@], [@ofile@])[
 /*------------------.
 | Report an error.  |
 `------------------*/
 
 m4_append([b4_epilogue],
 [b4_syncline([@oline@], [@ofile@])[
 /*------------------.
 | Report an error.  |
 `------------------*/
 

-]b4_c_ansi_function_def([yyerror],
-    [static void],
-    [[const b4_namespace_ref::b4_parser_class_name::location_type *yylocationp],
-                        [yylocationp]],
+]b4_function_define([yyerror],
+    [static void],b4_locations_if([
+    [[const ]b4_namespace_ref::b4_parser_class_name[::location_type *yylocationp],
+                        [yylocationp]],])

     b4_parse_param,
     [[const char* msg], [msg]])[
 {
 ]b4_parse_param_use[]dnl
     b4_parse_param,
     [[const char* msg], [msg]])[
 {
 ]b4_parse_param_use[]dnl

-[  yyparser.error (*yylocationp, msg);
+[  yyparser.error (]b4_locations_if([[*yylocationp, ]])[msg);

 }
 
 
 ]b4_namespace_open[
 }
 
 
 ]b4_namespace_open[

-]dnl In this section, the parse param are the original parse_params.
+]dnl In this section, the parse params are the original parse_params.

 m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
 [  /// Build a parser object.
   ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)]m4_ifset([b4_parse_param], [
     :])[
 m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
 [  /// Build a parser object.
   ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)]m4_ifset([b4_parse_param], [
     :])[

-#if YYDEBUG
+#if ]b4_api_PREFIX[DEBUG

     ]m4_ifset([b4_parse_param], [  ], [ :])[yycdebug_ (&std::cerr)]m4_ifset([b4_parse_param], [,])[
 #endif]b4_parse_param_cons[
   {
     ]m4_ifset([b4_parse_param], [  ], [ :])[yycdebug_ (&std::cerr)]m4_ifset([b4_parse_param], [,])[
 #endif]b4_parse_param_cons[
   {


@@ -141,17 +154,17 @@ m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
     return ::yyparse (*this]b4_user_args[);
   }
 
     return ::yyparse (*this]b4_user_args[);
   }
 

-#if YYDEBUG
+#if ]b4_api_PREFIX[DEBUG

   /*--------------------.
   | Print this symbol.  |
   `--------------------*/
 
   inline void
   ]b4_parser_class_name[::yy_symbol_value_print_ (int yytype,
   /*--------------------.
   | Print this symbol.  |
   `--------------------*/
 
   inline void
   ]b4_parser_class_name[::yy_symbol_value_print_ (int yytype,

-                           const semantic_type* yyvaluep,
-                           const location_type* yylocationp)
-  {
-    YYUSE (yylocationp);
+                           const semantic_type* yyvaluep]b4_locations_if([[,
+                           const location_type* yylocationp]])[)
+  {]b4_locations_if([[
+    YYUSE (yylocationp);]])[

     YYUSE (yyvaluep);
     std::ostream& yyoutput = debug_stream ();
     std::ostream& yyo = yyoutput;
     YYUSE (yyvaluep);
     std::ostream& yyoutput = debug_stream ();
     std::ostream& yyo = yyoutput;


@@ -167,13 +180,13 @@ m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
 
   void
   ]b4_parser_class_name[::yy_symbol_print_ (int yytype,
 
   void
   ]b4_parser_class_name[::yy_symbol_print_ (int yytype,

-                           const semantic_type* yyvaluep,
-                           const location_type* yylocationp)
+                           const semantic_type* yyvaluep]b4_locations_if([[,
+                           const location_type* yylocationp]])[)

   {
     *yycdebug_ << (yytype < YYNTOKENS ? "token" : "nterm")
   {
     *yycdebug_ << (yytype < YYNTOKENS ? "token" : "nterm")

-               << ' ' << yytname[yytype] << " ("
-               << *yylocationp << ": ";
-    yy_symbol_value_print_ (yytype, yyvaluep, yylocationp);
+               << ' ' << yytname[yytype] << " ("]b4_locations_if([[
+               << *yylocationp << ": "]])[;
+    yy_symbol_value_print_ (yytype, yyvaluep]b4_locations_if([[, yylocationp]])[);

     *yycdebug_ << ')';
   }
 
     *yycdebug_ << ')';
   }
 


@@ -199,72 +212,35 @@ m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
   void
   ]b4_parser_class_name[::set_debug_level (debug_level_type l)
   {
   void
   ]b4_parser_class_name[::set_debug_level (debug_level_type l)
   {

+    // Actually, it is yydebug which is really used.

     yydebug = l;
   }
 
 #endif
 ]m4_popdef([b4_parse_param])dnl
     yydebug = l;
   }
 
 #endif
 ]m4_popdef([b4_parse_param])dnl

-b4_namespace_close[
-]])
-
-
-# Let glr.c believe that the user arguments include the parser itself.
-m4_ifset([b4_parse_param],
-[m4_pushdef([b4_parse_param],
-            m4_dquote([[[b4_namespace_ref::b4_parser_class_name& yyparser], [[yyparser]]],]
-m4_defn([b4_parse_param])))],
-[m4_pushdef([b4_parse_param],
-            [[[[b4_namespace_ref::b4_parser_class_name& yyparser], [[yyparser]]]]])
+b4_namespace_close

 ])
 ])

-m4_include(b4_pkgdatadir/[glr.c])
-m4_popdef([b4_parse_param])
-
-m4_divert_push(0)
-@output(b4_spec_defines_file@)@
-b4_copyright([Skeleton interface for Bison GLR parsers in C++],
-             [2002-2012])[
-
-/* C++ GLR parser skeleton written by Akim Demaille.  */

 
 

-#ifndef PARSER_HEADER_H
-# define PARSER_HEADER_H
-
-]b4_percent_code_get([[requires]])[
+# b4_shared_declarations
+# ----------------------
+# Declaration that might either go into the header (if --defines)
+# or open coded in the parser body.
+m4_define([b4_shared_declarations],
+[m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
+b4_percent_code_get([[requires]])[

 
 #include <stdexcept>
 #include <string>
 
 #include <stdexcept>
 #include <string>

-#include <iostream>
-]b4_percent_define_ifdef([[location_type]], [],
-                         [[#include "location.hh"]])[
-
-/* Using locations.  */
-#define YYLSP_NEEDED ]b4_locations_if([1], [0])[
+#include <iostream>]b4_defines_if([
+b4_bison_locations_if([[#include "location.hh"]])])[

 
 

-/* Enabling traces.  */
-#ifndef YYDEBUG
-# define YYDEBUG ]b4_parse_trace_if([1], [0])[
-#endif
-
-/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
-   If N is 0, then set CURRENT to the empty location which ends
-   the previous symbol: RHS[0] (always defined).  */
-
-#ifndef YYLLOC_DEFAULT
-# define YYLLOC_DEFAULT(Current, Rhs, N)                                \
-    do                                                                  \
-      if (N)                                                            \
-        {                                                               \
-          (Current).begin  = YYRHSLOC (Rhs, 1).begin;                   \
-          (Current).end    = YYRHSLOC (Rhs, N).end;                     \
-        }                                                               \
-      else                                                              \
-        {                                                               \
-          (Current).begin = (Current).end = YYRHSLOC (Rhs, 0).end;      \
-        }                                                               \
-    while (/*CONSTCOND*/ 0)
-#endif
+]b4_YYDEBUG_define[

 
 ]b4_namespace_open[
 
 ]b4_namespace_open[

+]b4_defines_if([],
+[b4_bison_locations_if([b4_position_define
+b4_location_define])])[
+

   /// A Bison parser.
   class ]b4_parser_class_name[
   {
   /// A Bison parser.
   class ]b4_parser_class_name[
   {


@@ -292,29 +268,29 @@ b4_copyright([Skeleton interface for Bison GLR parsers in C++],
     void set_debug_level (debug_level_type l);
 
   public:
     void set_debug_level (debug_level_type l);
 
   public:

-    /// Report a syntax error.
-    /// \param loc    where the syntax error is found.
+    /// Report a syntax error.]b4_locations_if([[
+    /// \param loc    where the syntax error is found.]])[

     /// \param msg    a description of the syntax error.
     /// \param msg    a description of the syntax error.

-    virtual void error (const location_type& loc, const std::string& msg);
+    virtual void error (]b4_locations_if([[const location_type& loc, ]])[const std::string& msg);

 
 

-#if YYDEBUG
+# if ]b4_api_PREFIX[DEBUG

   public:
     /// \brief Report a symbol value on the debug stream.
     /// \param yytype       The token type.
   public:
     /// \brief Report a symbol value on the debug stream.
     /// \param yytype       The token type.

-    /// \param yyvaluep     Its semantic value.
-    /// \param yylocationp  Its location.
+    /// \param yyvaluep     Its semantic value.]b4_locations_if([[
+    /// \param yylocationp  Its location.]])[

     virtual void yy_symbol_value_print_ (int yytype,
     virtual void yy_symbol_value_print_ (int yytype,

-                                         const semantic_type* yyvaluep,
-                                         const location_type* yylocationp);
+                                         const semantic_type* yyvaluep]b4_locations_if([[,
+                                         const location_type* yylocationp]])[);

     /// \brief Report a symbol on the debug stream.
     /// \param yytype       The token type.
     /// \brief Report a symbol on the debug stream.
     /// \param yytype       The token type.

-    /// \param yyvaluep     Its semantic value.
-    /// \param yylocationp  Its location.
+    /// \param yyvaluep     Its semantic value.]b4_locations_if([[
+    /// \param yylocationp  Its location.]])[

     virtual void yy_symbol_print_ (int yytype,
     virtual void yy_symbol_print_ (int yytype,

-                                   const semantic_type* yyvaluep,
-                                   const location_type* yylocationp);
+                                   const semantic_type* yyvaluep]b4_locations_if([[,
+                                   const location_type* yylocationp]])[);

   private:
   private:

-    /* Debugging.  */
+    // Debugging.

     std::ostream* yycdebug_;
 #endif
 
     std::ostream* yycdebug_;
 #endif
 


@@ -323,18 +299,34 @@ b4_copyright([Skeleton interface for Bison GLR parsers in C++],
 
 ]dnl Redirections for glr.c.
 b4_percent_define_flag_if([[global_tokens_and_yystype]],
 
 ]dnl Redirections for glr.c.
 b4_percent_define_flag_if([[global_tokens_and_yystype]],

-[b4_token_defines(b4_tokens)])
+[b4_token_defines])

 [
 [

-#ifndef YYSTYPE
-# define YYSTYPE ]b4_namespace_ref[::]b4_parser_class_name[::semantic_type
+#ifndef ]b4_api_PREFIX[STYPE
+# define ]b4_api_PREFIX[STYPE ]b4_namespace_ref[::]b4_parser_class_name[::semantic_type

 #endif
 #endif

-#ifndef YYLTYPE
-# define YYLTYPE ]b4_namespace_ref[::]b4_parser_class_name[::location_type
+#ifndef ]b4_api_PREFIX[LTYPE
+# define ]b4_api_PREFIX[LTYPE ]b4_namespace_ref[::]b4_parser_class_name[::location_type

 #endif
 
 ]b4_namespace_close[
 #endif
 
 ]b4_namespace_close[

+]b4_percent_code_get([[provides]])[
+]m4_popdef([b4_parse_param])dnl
+])
+
+b4_defines_if(
+[b4_output_begin([b4_spec_defines_file])
+b4_copyright([Skeleton interface for Bison GLR parsers in C++],
+             [2002-2012])[
+
+// C++ GLR parser skeleton written by Akim Demaille.

 
 

-]b4_percent_code_get([[provides]])[]dnl
+]b4_cpp_guard_open([b4_spec_defines_file])[
+]b4_shared_declarations[
+]b4_cpp_guard_close([b4_spec_defines_file])[
+]b4_output_end()])

 
 

-[#endif /* ! defined PARSER_HEADER_H */]
-m4_divert_pop(0)
+# Let glr.c (and b4_shared_declarations) believe that the user
+# arguments include the parser itself.
+m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_wrap]))
+m4_include(b4_pkgdatadir/[glr.c])
+m4_popdef([b4_parse_param])