yacc.c: style changes

[bison.git] / data / lalr1.cc

diff --git a/data/lalr1.cc b/data/lalr1.cc
index 59b30964473c10cba5c22c0c796a4534891097d6..37522aa3a1827f9d9ec86bd2ca6a89990b9289e4 100644 (file)
--- a/data/lalr1.cc
+++ b/data/lalr1.cc
@@ -22,7 +22,7 @@ m4_include(b4_pkgdatadir/[c++.m4])
 # --------------------------------------------------------------
 # Declare "parser::yy<TABLE-NAME>_" which contents is CONTENT.
 m4_define([b4_integral_parser_table_declare],
 # --------------------------------------------------------------
 # Declare "parser::yy<TABLE-NAME>_" which contents is CONTENT.
 m4_define([b4_integral_parser_table_declare],

-[m4_ifval([$3], [b4_c_comment([$3], [  ])
+[m4_ifval([$3], [b4_comment([$3], [  ])

 ])dnl
   static const b4_int_type_for([$2]) yy$1_[[]];dnl
 ])
 ])dnl
   static const b4_int_type_for([$2]) yy$1_[[]];dnl
 ])


@@ -98,19 +98,19 @@ m4_define([b4_rhs_location],
 # Same as in C, but using references instead of pointers.
 m4_define([b4_symbol_action],
 [b4_symbol_if([$1], [has_$2],
 # Same as in C, but using references instead of pointers.
 m4_define([b4_symbol_action],
 [b4_symbol_if([$1], [has_$2],

-[m4_pushdef([b4_dollar_dollar],
-    [b4_symbol_value_template([yysym.value],
-                              b4_symbol_if([$1], [has_type],
-                                           [b4_symbol([$1], [type])]))])dnl
-m4_pushdef([b4_at_dollar], [yysym.location])dnl
+[m4_pushdef([b4_symbol_value], m4_defn([b4_symbol_value_template]))[]dnl
+b4_dollar_pushdef([yysym.value],
+                   b4_symbol_if([$1], [has_type],
+                                [m4_dquote(b4_symbol([$1], [type]))]),
+                   [yysym.location])dnl

       b4_symbol_case_([$1])
 b4_syncline([b4_symbol([$1], [$2_line])], ["b4_symbol([$1], [$2_file])"])
         b4_symbol([$1], [$2])
 b4_syncline([@oline@], [@ofile@])
         break;
 
       b4_symbol_case_([$1])
 b4_syncline([b4_symbol([$1], [$2_line])], ["b4_symbol([$1], [$2_file])"])
         b4_symbol([$1], [$2])
 b4_syncline([@oline@], [@ofile@])
         break;
 

-m4_popdef([b4_at_dollar])dnl
-m4_popdef([b4_dollar_dollar])dnl
+m4_popdef([b4_symbol_value])[]dnl
+b4_dollar_popdef[]dnl

 ])])
 
 
 ])])
 
 


@@ -120,48 +120,37 @@ m4_pushdef([b4_copyright_years],
 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]])])
 

-# The header is mandatory.
-b4_defines_if([],
-              [b4_fatal([b4_skeleton[: using %%defines is mandatory]])])
-
-b4_locations_if([b4_percent_define_ifdef([[location_type]], [],
-  [# Backward compatibility.
+b4_bison_locations_if([# Backward compatibility.

    m4_define([b4_location_constructors])
    m4_define([b4_location_constructors])

-   m4_include(b4_pkgdatadir/[location.cc])])])
+   m4_include(b4_pkgdatadir/[location.cc])])

 m4_include(b4_pkgdatadir/[stack.hh])
 b4_variant_if([m4_include(b4_pkgdatadir/[variant.hh])])
 
 m4_include(b4_pkgdatadir/[stack.hh])
 b4_variant_if([m4_include(b4_pkgdatadir/[variant.hh])])
 

-# We do want M4 expansion after # for CPP macros.
-m4_changecom()
-m4_divert_push(0)dnl
-@output(b4_spec_defines_file@)@
-b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++])
-[
-/**
- ** \file ]b4_spec_defines_file[
- ** Define the ]b4_namespace_ref[::parser class.
- */
-
-/* C++ LALR(1) parser skeleton written by Akim Demaille.  */
-
-]b4_cpp_guard_open([b4_spec_defines_file])[
-]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],
+[b4_percent_code_get([[requires]])[

 ]b4_parse_assert_if([# include <cassert>])[
 ]b4_parse_assert_if([# include <cassert>])[

-# include <stdexcept>
-# include <string>
+# include <deque>

 # include <iostream>
 # include <iostream>

+# include <stdexcept>
+# include <string>]b4_defines_if([[

 # include "stack.hh"
 # include "stack.hh"

-]b4_locations_if([b4_percent_define_ifdef([[location_type]], [],
-                                          [[# include "location.hh"]])])[
-
-]b4_variant_if([b4_namespace_open
-b4_variant_define
-b4_namespace_close])[
+]b4_bison_locations_if([[# include "location.hh"]])])[

 
 ]b4_YYDEBUG_define[
 
 ]b4_namespace_open[
 
 
 ]b4_YYDEBUG_define[
 
 ]b4_namespace_open[
 

+]b4_defines_if([],
+[b4_stack_define
+b4_bison_locations_if([b4_position_define
+b4_location_define])])[
+
+]b4_variant_if([b4_variant_define])[
+

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


@@ -189,10 +178,10 @@ b4_namespace_close])[
     void set_debug_level (debug_level_type l);
 #endif
 
     void set_debug_level (debug_level_type l);
 #endif
 

-    /// Report a syntax error.]b4_locations_if([
-    /// \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 (]b4_locations_if([const location_type& loc, ])[const std::string& msg);
+    virtual void error (]b4_locations_if([[const location_type& loc, ]])[const std::string& msg);

 
     /// Report a syntax error.
     void error (const syntax_error& err);
 
     /// Report a syntax error.
     void error (const syntax_error& err);


@@ -247,7 +236,7 @@ b4_namespace_close])[
 #endif // ]b4_api_PREFIX[DEBUG
 
     /// Convert a scanner token number \a t to a symbol number.
 #endif // ]b4_api_PREFIX[DEBUG
 
     /// Convert a scanner token number \a t to a symbol number.

-    static inline token_number_type yytranslate_ (]b4_lex_symbol_if([token_type], [int])[ t);
+    static inline token_number_type yytranslate_ (]b4_token_ctor_if([token_type], [int])[ t);

 
 #if ]b4_api_PREFIX[DEBUG
     /// \brief Display a symbol type, value and location.
 
 #if ]b4_api_PREFIX[DEBUG
     /// \brief Display a symbol type, value and location.


@@ -277,7 +266,7 @@ b4_namespace_close])[
       inline stack_symbol_type ();
 
       /// Constructor.
       inline stack_symbol_type ();
 
       /// Constructor.

-      inline stack_symbol_type (]b4_args([state_type s],
+      inline stack_symbol_type (]b4_join([state_type s],

                                          [const semantic_type& v],
                                          b4_locations_if([const location_type& l]))[);
 
                                          [const semantic_type& v],
                                          b4_locations_if([const location_type& l]))[);
 


@@ -328,12 +317,12 @@ b4_namespace_close])[
 ]b4_parse_param_vars[
   };
 
 ]b4_parse_param_vars[
   };
 

-]b4_lex_symbol_if([b4_yytranslate_define
+]b4_token_ctor_if([b4_yytranslate_define

 b4_public_types_define])[
 ]b4_namespace_close[
 
 ]b4_percent_define_flag_if([[global_tokens_and_yystype]],
 b4_public_types_define])[
 ]b4_namespace_close[
 
 ]b4_percent_define_flag_if([[global_tokens_and_yystype]],

-[b4_token_defines(b4_tokens)
+[b4_token_defines

 
 #ifndef ]b4_api_PREFIX[STYPE
  /* Redirection for backward compatibility.  */
 
 #ifndef ]b4_api_PREFIX[STYPE
  /* Redirection for backward compatibility.  */


@@ -341,8 +330,30 @@ b4_public_types_define])[
 #endif
 ])[
 ]b4_percent_code_get([[provides]])[
 #endif
 ])[
 ]b4_percent_code_get([[provides]])[

+]])
+
+# We do want M4 expansion after # for CPP macros.
+m4_changecom()
+b4_defines_if(
+[m4_divert_push(0)dnl
+@output(b4_spec_defines_file@)@
+b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++])
+[
+/**
+ ** \file ]b4_spec_defines_file[
+ ** Define the ]b4_namespace_ref[::parser class.
+ */
+
+/* C++ LALR(1) 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])
 ]b4_cpp_guard_close([b4_spec_defines_file])

-@output(b4_parser_file_name@)@
+b4_output_end()
+])
+
+
+b4_output_begin([b4_parser_file_name])

 b4_copyright([Skeleton implementation for Bison LALR(1) parsers in C++])
 b4_percent_code_get([[top]])[]dnl
 m4_if(b4_prefix, [yy], [],
 b4_copyright([Skeleton implementation for Bison LALR(1) parsers in C++])
 b4_percent_code_get([[top]])[]dnl
 m4_if(b4_prefix, [yy], [],


@@ -350,17 +361,18 @@ m4_if(b4_prefix, [yy], [],
 // Take the name prefix into account.
 #define yylex   b4_prefix[]lex])[
 
 // Take the name prefix into account.
 #define yylex   b4_prefix[]lex])[
 

-/* First part of user declarations.  */
+// First part of user declarations.

 ]b4_user_pre_prologue[
 
 ]b4_user_pre_prologue[
 

-#include "@basename(]b4_spec_defines_file[@)"
+]b4_null_define[
+
+]b4_defines_if([[#include "@basename(]b4_spec_defines_file[@)"]],
+               [b4_shared_declarations])[

 
 /* User implementation prologue.  */
 ]b4_user_post_prologue[
 ]b4_percent_code_get[
 
 
 /* User implementation prologue.  */
 ]b4_user_post_prologue[
 ]b4_percent_code_get[
 

-]b4_null_define[
-

 #ifndef YY_
 # if defined YYENABLE_NLS && YYENABLE_NLS
 #  if ENABLE_NLS
 #ifndef YY_
 # if defined YYENABLE_NLS && YYENABLE_NLS
 #  if ENABLE_NLS


@@ -484,7 +496,7 @@ m4_if(b4_prefix, [yy], [],
   | Symbol types.  |
   `---------------*/
 
   | Symbol types.  |
   `---------------*/
 

-]b4_lex_symbol_if([], [b4_public_types_define])[
+]b4_token_ctor_if([], [b4_public_types_define])[

 
   // stack_symbol_type.
   ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type ()
 
   // stack_symbol_type.
   ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type ()


@@ -493,7 +505,7 @@ m4_if(b4_prefix, [yy], [],
   {
   }
 
   {
   }
 

-  ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type (]b4_args(
+  ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type (]b4_join(

                  [state_type s],
                  [const semantic_type& v],
                  b4_locations_if([const location_type& l]))[)
                  [state_type s],
                  [const semantic_type& v],
                  b4_locations_if([const location_type& l]))[)


@@ -559,13 +571,13 @@ m4_if(b4_prefix, [yy], [],
     if (m)
       YY_SYMBOL_PRINT (m, sym);
 ]b4_variant_if(
     if (m)
       YY_SYMBOL_PRINT (m, sym);
 ]b4_variant_if(

-[[    yystack_.push (stack_symbol_type (]b4_args(
+[[    yystack_.push (stack_symbol_type (]b4_join(

                     [s],
                     [semantic_type()],
                     b4_locations_if([sym.location]))[));
     ]b4_symbol_variant([[yystos_[s]]], [[yystack_[0].value]],
                        [build], [sym.value])],
                     [s],
                     [semantic_type()],
                     b4_locations_if([sym.location]))[));
     ]b4_symbol_variant([[yystos_[s]]], [[yystack_[0].value]],
                        [build], [sym.value])],

-[[    yystack_.push (stack_symbol_type (]b4_args(
+[[    yystack_.push (stack_symbol_type (]b4_join(

                       [s],
                       [sym.value],
                       b4_locations_if([sym.location]))[));]])[
                       [s],
                       [sym.value],
                       b4_locations_if([sym.location]))[));]])[


@@ -577,7 +589,7 @@ m4_if(b4_prefix, [yy], [],
     if (m)
       YY_SYMBOL_PRINT (m, s);
 ]b4_variant_if(
     if (m)
       YY_SYMBOL_PRINT (m, s);
 ]b4_variant_if(

-[[    yystack_.push (stack_symbol_type (]b4_args(
+[[    yystack_.push (stack_symbol_type (]b4_join(

                        [s.state],
                        [semantic_type()],
                        b4_locations_if([s.location]))[));
                        [s.state],
                        [semantic_type()],
                        b4_locations_if([s.location]))[));


@@ -647,11 +659,11 @@ m4_if(b4_prefix, [yy], [],
     /// Whether yyla contains a lookahead.
     bool yyempty = true;
 
     /// Whether yyla contains a lookahead.
     bool yyempty = true;
 

-    /* State.  */
+    // State.

     int yyn;
     int yylen = 0;
 
     int yyn;
     int yylen = 0;
 

-    /* Error handling.  */
+    // Error handling.

     int yynerrs_ = 0;
     int yyerrstatus_ = 0;
 
     int yynerrs_ = 0;
     int yyerrstatus_ = 0;
 


@@ -667,15 +679,17 @@ m4_if(b4_prefix, [yy], [],
     /// The return value of parse ().
     int yyresult;
 
     /// The return value of parse ().
     int yyresult;
 

+    // FIXME: This shoud be completely indented.  It is not yet to
+    // avoid gratuitous conflicts when merging into the master branch.
+    try
+      {

     YYCDEBUG << "Starting parse" << std::endl;
 
 ]m4_ifdef([b4_initial_action], [
     YYCDEBUG << "Starting parse" << std::endl;
 
 ]m4_ifdef([b4_initial_action], [

-m4_pushdef([b4_at_dollar],     [yyla.location])dnl
-m4_pushdef([b4_dollar_dollar], [yyla.value])dnl
+b4_dollar_pushdef([yyla.value], [], [yyla.location])dnl

     /* User initialization code.  */
     b4_user_initial_action
     /* User initialization code.  */
     b4_user_initial_action

-m4_popdef([b4_dollar_dollar])dnl
-m4_popdef([b4_at_dollar])])dnl
+b4_dollar_popdef])[]dnl

 
   [  /* Initialize the stack.  The initial state will be set in
        yynewstate, since the latter expects the semantical and the
 
   [  /* Initialize the stack.  The initial state will be set in
        yynewstate, since the latter expects the semantical and the


@@ -707,20 +721,20 @@ m4_popdef([b4_at_dollar])])dnl
       {
         YYCDEBUG << "Reading a token: ";
         try
       {
         YYCDEBUG << "Reading a token: ";
         try

-        {
-]b4_lex_symbol_if(
-[          yyla = b4_c_function_call([yylex], [symbol_type],
+          {
+]b4_token_ctor_if(
+[            yyla = b4_function_call([yylex], [symbol_type],

                                      m4_ifdef([b4_lex_param], b4_lex_param));],
                                      m4_ifdef([b4_lex_param], b4_lex_param));],

-[          yyla.type = yytranslate_ (b4_c_function_call([yylex], [int],
+[            yyla.type = yytranslate_ (b4_function_call([yylex], [int],

                                      [b4_api_PREFIX[STYPE*], [&yyla.value]][]dnl
 b4_locations_if([, [[location*], [&yyla.location]]])dnl
 m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[
                                      [b4_api_PREFIX[STYPE*], [&yyla.value]][]dnl
 b4_locations_if([, [[location*], [&yyla.location]]])dnl
 m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[

-        }
+          }

         catch (const syntax_error& yyexc)
         catch (const syntax_error& yyexc)

-        {
-          error (yyexc);
-          goto yyerrlab1;
-        }
+          {
+            error (yyexc);
+            goto yyerrlab1;
+          }

         yyempty = false;
       }
     YY_SYMBOL_PRINT ("Next token is", yyla);
         yyempty = false;
       }
     YY_SYMBOL_PRINT ("Next token is", yyla);


@@ -793,19 +807,19 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[
     // Perform the reduction.
     YY_REDUCE_PRINT (yyn);
     try
     // Perform the reduction.
     YY_REDUCE_PRINT (yyn);
     try

-    {
-      switch (yyn)

       {
       {

+        switch (yyn)
+          {

 ]b4_user_actions[
 ]b4_user_actions[

-        default:
-          break;
+          default:
+            break;
+          }

       }
       }

-    }

     catch (const syntax_error& yyexc)
     catch (const syntax_error& yyexc)

-    {
-      error (yyexc);
-      YYERROR;
-    }
+      {
+        error (yyexc);
+        YYERROR;
+      }

     YY_SYMBOL_PRINT ("-> $$ =", yylhs);
 ]b4_variant_if([[
     // Destroy the rhs symbols.
     YY_SYMBOL_PRINT ("-> $$ =", yylhs);
 ]b4_variant_if([[
     // Destroy the rhs symbols.


@@ -838,7 +852,7 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[
     if (!yyerrstatus_)
       {
         ++yynerrs_;
     if (!yyerrstatus_)
       {
         ++yynerrs_;

-        error (]b4_args(b4_locations_if([yyla.location]),
+        error (]b4_join(b4_locations_if([yyla.location]),

                         [[yysyntax_error_ (yystack_[0].state,
                                            yyempty ? yyempty_ : yyla.type)]])[);
       }
                         [[yysyntax_error_ (yystack_[0].state,
                                            yyempty ? yyempty_ : yyla.type)]])[);
       }


@@ -941,7 +955,7 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[
     /* Do not reclaim the symbols of the rule which action triggered
        this YYABORT or YYACCEPT.  */
     yypop_ (yylen);
     /* Do not reclaim the symbols of the rule which action triggered
        this YYABORT or YYACCEPT.  */
     yypop_ (yylen);

-    while (yystack_.size () != 1)
+    while (1 < yystack_.size ())

       {
         yy_destroy_ ("Cleanup: popping", yystack_[0]);
         yypop_ ();
       {
         yy_destroy_ ("Cleanup: popping", yystack_[0]);
         yypop_ ();


@@ -949,11 +963,28 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[
 
     return yyresult;
   }
 
     return yyresult;
   }

+    catch (...)
+      {
+        YYCDEBUG << "Exception caught: cleaning lookahead and stack"
+                 << std::endl;
+        // Do not try to display the values of the reclaimed symbols,
+        // as their printer might throw an exception.
+        if (!yyempty)
+          yy_destroy_ (YY_NULL, yyla);
+
+        while (1 < yystack_.size ())
+          {
+            yy_destroy_ (YY_NULL, yystack_[0]);
+            yypop_ ();
+          }
+        throw;
+      }
+  }

 
   void
   ]b4_parser_class_name[::error (const syntax_error& yyexc)
   {
 
   void
   ]b4_parser_class_name[::error (const syntax_error& yyexc)
   {

-    error (]b4_args(b4_locations_if([yyexc.location]),
+    error (]b4_join(b4_locations_if([yyexc.location]),

                     [[yyexc.what()]])[);
   }
 
                     [[yyexc.what()]])[);
   }
 


@@ -1103,8 +1134,10 @@ b4_error_verbose_if([state_type yystate, int yytoken],
   }
 #endif // ]b4_api_PREFIX[DEBUG
 
   }
 #endif // ]b4_api_PREFIX[DEBUG
 

-]b4_lex_symbol_if([], [b4_yytranslate_define])[
+]b4_token_ctor_if([], [b4_yytranslate_define])[

 ]b4_namespace_close[
 ]b4_epilogue[]dnl
 ]b4_namespace_close[
 ]b4_epilogue[]dnl

-m4_divert_pop(0)
+b4_output_end()
+
+

 m4_popdef([b4_copyright_years])dnl
 m4_popdef([b4_copyright_years])dnl