c: improve the definition of public types

[bison.git] / data / glr.cc

diff --git a/data/glr.cc b/data/glr.cc
index 69b328b66db4b575733ce6eb641c2061f937c789..8b9bf02f2bc16a6f6210c2fce1a1492e7e85ab09 100644 (file)
--- a/data/glr.cc
+++ b/data/glr.cc
@@ -46,13 +46,8 @@
 # We require a pure interface.
 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])
-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]])])
@@ -60,9 +55,20 @@ m4_define([b4_parser_class_name],
 # 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_define
-# ---------------------------
+# -------------------------
 # Bypass the default implementation to generate the "yy_symbol_print"
 # and "yy_symbol_value_print" functions.
 m4_define([b4_yy_symbol_print_define],
@@ -85,12 +91,16 @@ b4_locations_if([,
 ]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])]))])[
 
 # Hijack the post prologue to insert early definition of YYLLOC_DEFAULT
 # and declaration of yyerror.
-m4_append([b4_post_prologue],
+]m4_append([b4_post_prologue],
 [b4_syncline([@oline@], [@ofile@])[
 ]b4_yylloc_default_define[
 #define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc)
@@ -123,7 +133,7 @@ m4_append([b4_epilogue],
 
 
 ]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], [
@@ -208,37 +218,29 @@ m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
 
 #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],
-            [[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])
-
 
 # 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],
-[b4_percent_code_get([[requires]])[
+[m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
+b4_percent_code_get([[requires]])[
 
 #include <stdexcept>
 #include <string>
-#include <iostream>
-]b4_percent_define_ifdef([[location_type]], [],
-                         [[#include "location.hh"]])[
+#include <iostream>]b4_defines_if([
+b4_bison_locations_if([[#include "location.hh"]])])[
 
 ]b4_YYDEBUG_define[
 
 ]b4_namespace_open[
+]b4_defines_if([],
+[b4_bison_locations_if([b4_position_define
+b4_location_define])])[
+
   /// A Bison parser.
   class ]b4_parser_class_name[
   {
@@ -288,7 +290,7 @@ m4_define([b4_shared_declarations],
                                    const semantic_type* yyvaluep]b4_locations_if([[,
                                    const location_type* yylocationp]])[);
   private:
-    /* Debugging.  */
+    // Debugging.
     std::ostream* yycdebug_;
 #endif
 
@@ -308,16 +310,23 @@ b4_percent_define_flag_if([[global_tokens_and_yystype]],
 
 ]b4_namespace_close[
 ]b4_percent_code_get([[provides]])[
-]])
+]m4_popdef([b4_parse_param])dnl
+])
 
-m4_divert_push(0)
-@output(b4_spec_defines_file@)@
+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.  */
+// C++ GLR parser skeleton written by Akim Demaille.
 
 ]b4_cpp_guard_open([b4_spec_defines_file])[
 ]b4_shared_declarations[
 ]b4_cpp_guard_close([b4_spec_defines_file])[
-]m4_divert_pop(0)
+]b4_output_end()])
+
+# 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])