X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/68e11668e4b4c3cd9564b6a920656ace3768ec59..e62f1a899168bdf1658dd6d934dea407491a80ff:/data/lalr1.cc?ds=sidebyside diff --git a/data/lalr1.cc b/data/lalr1.cc index 36d1dea0..c613b3c8 100644 --- a/data/lalr1.cc +++ b/data/lalr1.cc @@ -1,6 +1,8 @@ m4_divert(-1) + # C++ skeleton for Bison -# Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. + +# Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by @@ -21,8 +23,8 @@ m4_divert(-1) ## Default values. ## ## ---------------- ## -# Default Parser class name. -m4_define_default([b4_parser_class_name], [Parser]) +# Default parser class name. +m4_define_default([b4_parser_class_name], [parser]) @@ -35,7 +37,7 @@ m4_define_default([b4_parser_class_name], [Parser]) # -------------------- # Expansion of $$. m4_define([b4_lhs_value], -[yyval[]m4_ifval([$1], [.$1])]) +[(yyval[]m4_ifval([$1], [.$1]))]) # b4_rhs_value(RULE-LENGTH, NUM, [TYPE]) @@ -43,15 +45,16 @@ m4_define([b4_lhs_value], # Expansion of $NUM, where the current rule has RULE-LENGTH # symbols on RHS. m4_define([b4_rhs_value], -[semantic_stack_@{m4_eval([$1 - $2])@}m4_ifval([$3], [.$3])]) +[(yysemantic_stack_@{m4_eval([$1 - $2])@}m4_ifval([$3], [.$3]))]) -m4_define_default([b4_location_type], [Location]) +m4_define_default([b4_location_type], [location]) +m4_define_default([b4_filename_type], [std::string]) # b4_lhs_location() # ----------------- # Expansion of @$. m4_define([b4_lhs_location], -[yyloc]) +[(yyloc)]) # b4_rhs_location(RULE-LENGTH, NUM) @@ -59,26 +62,7 @@ m4_define([b4_lhs_location], # Expansion of @NUM, where the current rule has RULE-LENGTH symbols # on RHS. m4_define([b4_rhs_location], -[location_stack_@{m4_eval([$1 - $2])@}]) - - -m4_define([b4_inherit], - [m4_ifdef([b4_root], - [: public b4_root -], - [])]) - -m4_define([b4_param], - [m4_ifdef([b4_root], - [, - const Param& param], - [])]) - -m4_define([b4_constructor], - [m4_ifdef([b4_root], - [b4_root (param), - ], - [])]) +[(yylocation_stack_@{m4_eval([$1 - $2])@})]) # b4_parse_param_decl @@ -89,7 +73,7 @@ m4_define([b4_constructor], # argument name in the constructor. m4_define([b4_parse_param_decl], [m4_ifset([b4_parse_param], - [, m4_map_sep([b4_parse_param_decl_1], [, ], [b4_parse_param])])]) + [m4_map_sep([b4_parse_param_decl_1], [, ], [b4_parse_param])])]) m4_define([b4_parse_param_decl_1], [$1_yyarg]) @@ -137,15 +121,18 @@ b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison], #ifndef PARSER_HEADER_H # define PARSER_HEADER_H -#include "stack.hh" -#include "location.hh" - #include #include /* Using locations. */ #define YYLSP_NEEDED ]b4_locations_flag[ +namespace yy +{ + class position; + class location; +} + ]b4_token_defines(b4_tokens)[ /* Copy the first part of user declarations. */ @@ -154,6 +141,9 @@ b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison], ]/* Line __line__ of lalr1.cc. */ b4_syncline([@oline@], [@ofile@])[ +#include "stack.hh" +#include "location.hh" + /* Enabling traces. */ #ifndef YYDEBUG # define YYDEBUG ]b4_debug[ @@ -164,16 +154,16 @@ b4_syncline([@oline@], [@ofile@])[ # define YYERROR_VERBOSE ]b4_error_verbose[ #endif -#ifdef YYSTYPE -typedef YYSTYPE yystype; -#else +#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED) ]m4_ifdef([b4_stype], [b4_syncline([b4_stype_line], [b4_filename]) -typedef union b4_stype yystype; +union YYSTYPE b4_stype; /* Line __line__ of lalr1.cc. */ b4_syncline([@oline@], [@ofile@])], -[typedef int yystype;])[ -# define YYSTYPE yystype +[typedef int YYSTYPE;])[ +# define yystype YYSTYPE /* obsolescent; will be withdrawn */ +# define YYSTYPE_IS_DECLARED 1 +# define YYSTYPE_IS_TRIVIAL 1 #endif /* Copy the second part of user declarations. */ @@ -205,157 +195,211 @@ namespace yy class ]b4_parser_class_name[; template - struct Traits + struct traits { }; template <> - struct Traits<]b4_parser_class_name[> + struct traits<]b4_parser_class_name[> { - typedef ]b4_int_type_for([b4_translate])[ TokenNumberType; - typedef ]b4_int_type_for([b4_rhs])[ RhsNumberType; - typedef int StateType; - typedef yystype SemanticType; - typedef ]b4_location_type[ LocationType; + typedef ]b4_int_type_for([b4_translate])[ token_number_type; + typedef ]b4_int_type_for([b4_rhs])[ rhs_number_type; + typedef int state_type; + typedef YYSTYPE semantic_type; + typedef ]b4_location_type[ location_type; }; } namespace yy { - class ]b4_parser_class_name b4_inherit[ + /// A Bison parser. + class ]b4_parser_class_name[ { - public: - - typedef Traits<]b4_parser_class_name[>::TokenNumberType TokenNumberType; - typedef Traits<]b4_parser_class_name[>::RhsNumberType RhsNumberType; - typedef Traits<]b4_parser_class_name[>::StateType StateType; - typedef Traits<]b4_parser_class_name[>::SemanticType SemanticType; - typedef Traits<]b4_parser_class_name[>::LocationType LocationType; - - typedef Stack StateStack; - typedef Stack SemanticStack; - typedef Stack LocationStack; + /// Symbol semantic values. + typedef traits<]b4_parser_class_name[>::semantic_type semantic_type; + /// Symbol locations. + typedef traits<]b4_parser_class_name[>::location_type location_type; - ]b4_parser_class_name[ (bool debug][]b4_param[]b4_parse_param_decl[) : - ]b4_constructor[][debug_ (debug), - cdebug_ (std::cerr)]b4_parse_param_cons[ - { - } - - ]b4_parser_class_name[ (bool debug, - LocationType][]b4_param[]b4_parse_param_decl[) : - ]b4_constructor[][debug_ (debug), - cdebug_ (std::cerr)]b4_parse_param_cons[ + public: + /// Build a parser object. + ]b4_parser_class_name[ (]b4_parse_param_decl[) : + yydebug_ (false), + yycdebug_ (&std::cerr)]b4_parse_param_cons[ { - cdebug_ << __FILE__ << ':' << __LINE__ - << ": this constructor is provided by backward compatibility" - << ", but will be removed in the near future." - << std::endl; } virtual ~]b4_parser_class_name[ () { } + /// Parse. + /// \returns 0 iff parsing succeeded. virtual int parse (); + /// The current debugging stream. + std::ostream& debug_stream () const; + /// Set the current debugging stream. + void set_debug_stream (std::ostream &); + + /// Type for debugging levels. + typedef int debug_level_type; + /// The current debugging level. + debug_level_type debug_level () const; + /// Set the current debugging level. + void set_debug_level (debug_level_type l); + private: - virtual void lex_ (); - virtual void error_ (); - virtual void report_syntax_error_ (); + /// Call the scanner. + virtual void yylex_ (); + + /// Report a syntax error. + /// \param loc where the syntax error is found. + /// \param msg a description of the syntax error. + virtual void error (const location_type& loc, const std::string& msg); + + /// Generate an error message, and invoke error. + virtual void yyreport_syntax_error_ (); + #if YYDEBUG - virtual void symprint_ (int yytype, - const SemanticType* yyvaluep, - const LocationType* 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); #endif /* ! YYDEBUG */ - /* Stacks. */ - StateStack state_stack_; - SemanticStack semantic_stack_; - LocationStack location_stack_; - + /// State numbers. + typedef traits<]b4_parser_class_name[>::state_type state_type; + /// State stack type. + typedef stack state_stack_type; + /// Semantic value stack type. + typedef stack semantic_stack_type; + /// location stack type. + typedef stack location_stack_type; + + /// The state stack. + state_stack_type yystate_stack_; + /// The semantic value stack. + semantic_stack_type yysemantic_stack_; + /// The location stack. + location_stack_type yylocation_stack_; + + /// Internal symbol numbers. + typedef traits<]b4_parser_class_name[>::token_number_type token_number_type; /* Tables. */ - static const ]b4_int_type_for([b4_pact])[ pact_[]; - static const ]b4_int_type(b4_pact_ninf, b4_pact_ninf)[ pact_ninf_; - static const ]b4_int_type_for([b4_defact])[ defact_[]; - static const ]b4_int_type_for([b4_pgoto])[ pgoto_[]; - static const ]b4_int_type_for([b4_defgoto])[ defgoto_[]; - static const ]b4_int_type_for([b4_table])[ table_[]; - static const ]b4_int_type(b4_table_ninf, b4_table_ninf)[ table_ninf_; - static const ]b4_int_type_for([b4_check])[ check_[]; - static const ]b4_int_type_for([b4_stos])[ stos_[]; - static const ]b4_int_type_for([b4_r1])[ r1_[]; - static const ]b4_int_type_for([b4_r2])[ r2_[]; + /// For a state, the index in \a yytable_ of its portion. + static const ]b4_int_type_for([b4_pact])[ yypact_[]; + static const ]b4_int_type(b4_pact_ninf, b4_pact_ninf)[ yypact_ninf_; + + /// For a state, default rule to reduce. + /// Unless\a yytable_ specifies something else to do. + /// Zero means the default is an error. + static const ]b4_int_type_for([b4_defact])[ yydefact_[]; + + static const ]b4_int_type_for([b4_pgoto])[ yypgoto_[]; + static const ]b4_int_type_for([b4_defgoto])[ yydefgoto_[]; + + /// What to do in a state. + /// \a yytable_[yypact_[s]]: what to do in state \a s. + /// - if positive, shift that token. + /// - if negative, reduce the rule which number is the opposite. + /// - if zero, do what YYDEFACT says. + static const ]b4_int_type_for([b4_table])[ yytable_[]; + static const ]b4_int_type(b4_table_ninf, b4_table_ninf)[ yytable_ninf_; + + static const ]b4_int_type_for([b4_check])[ yycheck_[]; + + /// For a state, its accessing symbol. + static const ]b4_int_type_for([b4_stos])[ yystos_[]; + + /// For a rule, its LHS. + static const ]b4_int_type_for([b4_r1])[ yyr1_[]; + /// For a rule, its RHS length. + static const ]b4_int_type_for([b4_r2])[ yyr2_[]; #if YYDEBUG || YYERROR_VERBOSE - static const char* const name_[]; + /// For a symbol, its name in clear. + static const char* const yyname_[]; #endif - /* More tables, for debugging. */ #if YYDEBUG - static const RhsNumberType rhs_[]; - static const ]b4_int_type_for([b4_prhs])[ prhs_[]; - static const ]b4_int_type_for([b4_rline])[ rline_[]; - static const ]b4_int_type_for([b4_toknum])[ token_number_[]; - virtual void reduce_print_ (int yyrule); - virtual void stack_print_ (); + /// A type to store symbol numbers and -1. + typedef traits<]b4_parser_class_name[>::rhs_number_type rhs_number_type; + /// A `-1'-separated list of the rules' RHS. + static const rhs_number_type yyrhs_[]; + /// For each rule, the index of the first RHS symbol in \a yyrhs_. + static const ]b4_int_type_for([b4_prhs])[ yyprhs_[]; + /// For each rule, its source line number. + static const ]b4_int_type_for([b4_rline])[ yyrline_[]; + /// For each scanner token number, its symbol number. + static const ]b4_int_type_for([b4_toknum])[ yytoken_number_[]; + /// Report on the debug stream that the rule \a r is going to be reduced. + virtual void yyreduce_print_ (int r); + /// Print the state stack on the debug stream. + virtual void yystack_print_ (); #endif - /* Even more tables. */ - inline TokenNumberType translate_ (int token); - inline void destruct_ (const char* yymsg, - int yytype, - SemanticType* yyvaluep, LocationType* yylocationp); + /// Convert a scanner token number to a symbol number. + inline token_number_type yytranslate_ (int token); + + /// \brief Reclaim the memory associated to a symbol. + /// \param yymsg Why this token is reclaimed. + /// \param yytype The symbol type. + /// \param yyvaluep Its semantic value. + /// \param yylocationp Its location. + inline void yydestruct_ (const char* yymsg, + int yytype, + semantic_type* yyvaluep, + location_type* yylocationp); /// Pop \a n symbols the three stacks. - inline void pop (unsigned int n = 1); + inline void yypop_ (unsigned int n = 1); /* Constants. */ - static const int eof_; + static const int yyeof_; /* LAST_ -- Last index in TABLE_. */ - static const int last_; - static const int nnts_; - static const int empty_; - static const int final_; - static const int terror_; - static const int errcode_; - static const int ntokens_; - static const unsigned int user_token_number_max_; - static const TokenNumberType undef_token_; + static const int yylast_; + static const int yynnts_; + static const int yyempty_; + static const int yyfinal_; + static const int yyterror_; + static const int yyerrcode_; + static const int yyntokens_; + static const unsigned int yyuser_token_number_max_; + static const token_number_type yyundef_token_; /* State. */ - int n_; - int len_; - int state_; + int yyn_; + int yylen_; + int yystate_; /* Error handling. */ - int nerrs_; - int errstatus_; + int yynerrs_; + int yyerrstatus_; /* Debugging. */ - int debug_; - std::ostream& cdebug_; + int yydebug_; + std::ostream* yycdebug_; /* Look-ahead and look-ahead in internal form. */ - int looka_; - int ilooka_; - - /* Message. */ - std::string message; + int yylooka_; + int yyilooka_; /// Semantic value of the look-ahead. - SemanticType value; + semantic_type yylval; /// Location of the look-ahead. - LocationType location; + location_type yylloc; /// The locations where the error started and ended. - Location error_range_[2]; + location yyerror_range_[2]; /// $$. - SemanticType yyval; + semantic_type yyval; /// @@$. - LocationType yyloc; + location_type yyloc; ]b4_parse_param_vars[ }; } @@ -365,41 +409,46 @@ namespace yy @output @output_parser_name@ b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison], [2002, 2003, 2004]) +m4_if(b4_prefix[], [yy], [], +[ +// Take the name prefix into account. +#define yylex b4_prefix[]lex]) +m4_if(b4_defines_flag, 0, [], +[ +#include @output_header_name@])[ -m4_if(b4_defines_flag, 0, [], [#include @output_header_name@])[ +/* A pseudo ostream that takes yydebug_ into account. */ +# define YYCDEBUG \ + for (bool yydebugcond_ = yydebug_; yydebugcond_; yydebugcond_ = false) \ + (*yycdebug_) /* Enable debugging if requested. */ #if YYDEBUG -# define YYCDEBUG \ - if (debug_) \ - cdebug_ - # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \ do { \ - if (debug_) \ + if (yydebug_) \ { \ - cdebug_ << (Title) << ' '; \ - symprint_ ((Type), (Value), (Location)); \ - cdebug_ << std::endl; \ + *yycdebug_ << (Title) << ' '; \ + yysymprint_ ((Type), (Value), (Location)); \ + *yycdebug_ << std::endl; \ } \ } while (0) # define YY_REDUCE_PRINT(Rule) \ do { \ - if (debug_) \ - reduce_print_ (Rule); \ + if (yydebug_) \ + yyreduce_print_ (Rule); \ } while (0) # define YY_STACK_PRINT() \ do { \ - if (debug_) \ - stack_print_ (); \ + if (yydebug_) \ + yystack_print_ (); \ } while (0) #else /* !YYDEBUG */ -# define YYCDEBUG if (0) cdebug_ # define YY_SYMBOL_PRINT(Title, Type, Value, Location) # define YY_REDUCE_PRINT(Rule) # define YY_STACK_PRINT() @@ -416,31 +465,35 @@ do { \ `--------------------------------*/ void -yy::]b4_parser_class_name[::symprint_ (int yytype, - const SemanticType* yyvaluep, const LocationType* yylocationp) +yy::]b4_parser_class_name[::yysymprint_ (int yytype, + const semantic_type* yyvaluep, const location_type* yylocationp) { /* Pacify ``unused variable'' warnings. */ (void) yyvaluep; (void) yylocationp; + /* Backward compatibility, but should be removed eventually. */ + std::ostream& cdebug_ = *yycdebug_; + (void) cdebug_; - cdebug_ << (yytype < ntokens_ ? "token" : "nterm") - << ' ' << name_[yytype] << " (" - << *yylocationp << ": "; + *yycdebug_ << (yytype < yyntokens_ ? "token" : "nterm") + << ' ' << yyname_[yytype] << " (" + << *yylocationp << ": "; switch (yytype) { ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl [ default: break; } - cdebug_ << ')'; + *yycdebug_ << ')'; } #endif /* ! YYDEBUG */ void -yy::]b4_parser_class_name[::destruct_ (const char* yymsg, - int yytype, SemanticType* yyvaluep, LocationType* yylocationp) +yy::]b4_parser_class_name[::yydestruct_ (const char* yymsg, + int yytype, semantic_type* yyvaluep, location_type* yylocationp) { /* Pacify ``unused variable'' warnings. */ + (void) yymsg; (void) yyvaluep; (void) yylocationp; @@ -455,28 +508,54 @@ yy::]b4_parser_class_name[::destruct_ (const char* yymsg, } void -yy::]b4_parser_class_name[::pop (unsigned int n) +yy::]b4_parser_class_name[::yypop_ (unsigned int n) { - state_stack_.pop (n); - semantic_stack_.pop (n); - location_stack_.pop (n); + yystate_stack_.pop (n); + yysemantic_stack_.pop (n); + yylocation_stack_.pop (n); } +std::ostream& +yy::]b4_parser_class_name[::debug_stream () const +{ + return *yycdebug_; +} + +void +yy::]b4_parser_class_name[::set_debug_stream (std::ostream& o) +{ + yycdebug_ = &o; +} + + +yy::]b4_parser_class_name[::debug_level_type +yy::]b4_parser_class_name[::debug_level () const +{ + return yydebug_; +} + +void +yy::]b4_parser_class_name[::set_debug_level (debug_level_type l) +{ + yydebug_ = l; +} + + int yy::]b4_parser_class_name[::parse () { YYCDEBUG << "Starting parse" << std::endl; - nerrs_ = 0; - errstatus_ = 0; + yynerrs_ = 0; + yyerrstatus_ = 0; /* Start. */ - state_ = 0; - looka_ = empty_; + yystate_ = 0; + yylooka_ = yyempty_; ]m4_ifdef([b4_initial_action], [ -m4_pushdef([b4_at_dollar], [location])dnl -m4_pushdef([b4_dollar_dollar], [value])dnl +m4_pushdef([b4_at_dollar], [yylloc])dnl +m4_pushdef([b4_dollar_dollar], [yylval])dnl /* User initialization code. */ b4_initial_action m4_popdef([b4_dollar_dollar])dnl @@ -488,94 +567,91 @@ b4_syncline([@oline@], [@ofile@])])dnl yynewstate, since the latter expects the semantical and the location values to have been already stored, initialize these stacks with a primary value. */ - state_stack_ = StateStack (0); - semantic_stack_ = SemanticStack (0); - location_stack_ = LocationStack (0); - semantic_stack_.push (value); - location_stack_.push (location); + yystate_stack_ = state_stack_type (0); + yysemantic_stack_ = semantic_stack_type (0); + yylocation_stack_ = location_stack_type (0); + yysemantic_stack_.push (yylval); + yylocation_stack_.push (yylloc); /* New state. */ yynewstate: - state_stack_.push (state_); - YYCDEBUG << "Entering state " << state_ << std::endl; + yystate_stack_.push (yystate_); + YYCDEBUG << "Entering state " << yystate_ << std::endl; goto yybackup; /* Backup. */ yybackup: /* Try to take a decision without look-ahead. */ - n_ = pact_[state_]; - if (n_ == pact_ninf_) + yyn_ = yypact_[yystate_]; + if (yyn_ == yypact_ninf_) goto yydefault; /* Read a look-ahead token. */ - if (looka_ == empty_) - { - YYCDEBUG << "Reading a token: "; - lex_ (); - } + if (yylooka_ == yyempty_) + yylex_ (); /* Convert token to internal form. */ - if (looka_ <= eof_) + if (yylooka_ <= yyeof_) { - looka_ = ilooka_ = eof_; + yylooka_ = yyilooka_ = yyeof_; YYCDEBUG << "Now at end of input." << std::endl; } else { - ilooka_ = translate_ (looka_); - YY_SYMBOL_PRINT ("Next token is", ilooka_, &value, &location); + yyilooka_ = yytranslate_ (yylooka_); + YY_SYMBOL_PRINT ("Next token is", yyilooka_, &yylval, &yylloc); } /* If the proper action on seeing token ILOOKA_ is to reduce or to detect an error, take that action. */ - n_ += ilooka_; - if (n_ < 0 || last_ < n_ || check_[n_] != ilooka_) + yyn_ += yyilooka_; + if (yyn_ < 0 || yylast_ < yyn_ || yycheck_[yyn_] != yyilooka_) goto yydefault; /* Reduce or error. */ - n_ = table_[n_]; - if (n_ < 0) + yyn_ = yytable_[yyn_]; + if (yyn_ < 0) { - if (n_ == table_ninf_) + if (yyn_ == yytable_ninf_) goto yyerrlab; else { - n_ = -n_; + yyn_ = -yyn_; goto yyreduce; } } - else if (n_ == 0) + else if (yyn_ == 0) goto yyerrlab; /* Accept? */ - if (n_ == final_) + if (yyn_ == yyfinal_) goto yyacceptlab; /* Shift the look-ahead token. */ - YY_SYMBOL_PRINT ("Shifting", ilooka_, &value, &location); + YY_SYMBOL_PRINT ("Shifting", yyilooka_, &yylval, &yylloc); /* Discard the token being shifted unless it is eof. */ - if (looka_ != eof_) - looka_ = empty_; + if (yylooka_ != yyeof_) + yylooka_ = yyempty_; - semantic_stack_.push (value); - location_stack_.push (location); + yysemantic_stack_.push (yylval); + yylocation_stack_.push (yylloc); /* Count tokens shifted since error; after three, turn off error status. */ - if (errstatus_) - --errstatus_; + if (yyerrstatus_) + --yyerrstatus_; - state_ = n_; + yystate_ = yyn_; goto yynewstate; /*-----------------------------------------------------------. | yydefault -- do the default action for the current state. | `-----------------------------------------------------------*/ yydefault: - n_ = defact_[state_]; - if (n_ == 0) + yyn_ = yydefact_[yystate_]; + if (yyn_ == 0) goto yyerrlab; goto yyreduce; @@ -583,45 +659,47 @@ yydefault: | yyreduce -- Do a reduction. | `-----------------------------*/ yyreduce: - len_ = r2_[n_]; + yylen_ = yyr2_[yyn_]; /* If LEN_ 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. This behavior is undocumented and Bison users should not rely upon it. */ - if (len_) - yyval = semantic_stack_[len_ - 1]; + if (yylen_) + yyval = yysemantic_stack_[yylen_ - 1]; else - yyval = semantic_stack_[0]; + yyval = yysemantic_stack_[0]; { - Slice slice (location_stack_, len_); - YYLLOC_DEFAULT (yyloc, slice, len_); + slice slice (yylocation_stack_, yylen_); + YYLLOC_DEFAULT (yyloc, slice, yylen_); } - YY_REDUCE_PRINT (n_); - switch (n_) + YY_REDUCE_PRINT (yyn_); + switch (yyn_) { ]b4_actions[ + default: break; } ]/* Line __line__ of lalr1.cc. */ b4_syncline([@oline@], [@ofile@])[ - pop (len_); + yypop_ (yylen_); YY_STACK_PRINT (); - semantic_stack_.push (yyval); - location_stack_.push (yyloc); + yysemantic_stack_.push (yyval); + yylocation_stack_.push (yyloc); /* Shift the result of the reduction. */ - n_ = r1_[n_]; - state_ = pgoto_[n_ - ntokens_] + state_stack_[0]; - if (0 <= state_ && state_ <= last_ && check_[state_] == state_stack_[0]) - state_ = table_[state_]; + yyn_ = yyr1_[yyn_]; + yystate_ = yypgoto_[yyn_ - yyntokens_] + yystate_stack_[0]; + if (0 <= yystate_ && yystate_ <= yylast_ + && yycheck_[yystate_] == yystate_stack_[0]) + yystate_ = yytable_[yystate_]; else - state_ = defgoto_[n_ - ntokens_]; + yystate_ = yydefgoto_[yyn_ - yyntokens_]; goto yynewstate; /*------------------------------------. @@ -629,36 +707,36 @@ b4_syncline([@oline@], [@ofile@])[ `------------------------------------*/ yyerrlab: /* If not already recovering from an error, report this error. */ - report_syntax_error_ (); + yyreport_syntax_error_ (); - error_range_[0] = location; - if (errstatus_ == 3) + yyerror_range_[0] = yylloc; + if (yyerrstatus_ == 3) { /* If just tried and failed to reuse look-ahead token after an error, discard it. */ /* Return failure if at end of input. */ - if (looka_ <= eof_) + if (yylooka_ <= yyeof_) { /* If at end of input, pop the error token, then the rest of the stack, then return failure. */ - if (looka_ == eof_) + if (yylooka_ == yyeof_) for (;;) { - error_range_[0] = location_stack_[0]; - pop (); - if (state_stack_.height () == 1) + yyerror_range_[0] = yylocation_stack_[0]; + yypop_ (); + if (yystate_stack_.height () == 1) YYABORT; - destruct_ ("Error: popping", - stos_[state_stack_[0]], - &semantic_stack_[0], - &location_stack_[0]); + yydestruct_ ("Error: popping", + yystos_[yystate_stack_[0]], + &yysemantic_stack_[0], + &yylocation_stack_[0]); } } else { - destruct_ ("Error: discarding", ilooka_, &value, &location); - looka_ = empty_; + yydestruct_ ("Error: discarding", yyilooka_, &yylval, &yylloc); + yylooka_ = yyempty_; } } @@ -672,65 +750,65 @@ yyerrlab: `---------------------------------------------------*/ yyerrorlab: -#ifdef __GNUC__ - /* Pacify GCC when the user code never invokes YYERROR and the label - yyerrorlab therefore never appears in user code. */ - if (0) + /* Pacify compilers like GCC when the user code never invokes + YYERROR and the label yyerrorlab therefore never appears in user + code. */ + if (false) goto yyerrorlab; -#endif - error_range_[0] = location_stack_[len_ - 1]; - pop (len_); - state_ = state_stack_[0]; + yyerror_range_[0] = yylocation_stack_[yylen_ - 1]; + yypop_ (yylen_); + yystate_ = yystate_stack_[0]; goto yyerrlab1; /*-------------------------------------------------------------. | yyerrlab1 -- common code for both syntax error and YYERROR. | `-------------------------------------------------------------*/ yyerrlab1: - errstatus_ = 3; /* Each real token shifted decrements this. */ + yyerrstatus_ = 3; /* Each real token shifted decrements this. */ for (;;) { - n_ = pact_[state_]; - if (n_ != pact_ninf_) + yyn_ = yypact_[yystate_]; + if (yyn_ != yypact_ninf_) { - n_ += terror_; - if (0 <= n_ && n_ <= last_ && check_[n_] == terror_) + yyn_ += yyterror_; + if (0 <= yyn_ && yyn_ <= yylast_ && yycheck_[yyn_] == yyterror_) { - n_ = table_[n_]; - if (0 < n_) + yyn_ = yytable_[yyn_]; + if (0 < yyn_) break; } } /* Pop the current state because it cannot handle the error token. */ - if (state_stack_.height () == 1) + if (yystate_stack_.height () == 1) YYABORT; - error_range_[0] = location_stack_[0]; - destruct_ ("Error: popping", - stos_[state_], &semantic_stack_[0], &location_stack_[0]); - pop (); - state_ = state_stack_[0]; + yyerror_range_[0] = yylocation_stack_[0]; + yydestruct_ ("Error: popping", + yystos_[yystate_], + &yysemantic_stack_[0], &yylocation_stack_[0]); + yypop_ (); + yystate_ = yystate_stack_[0]; YY_STACK_PRINT (); } - if (n_ == final_) + if (yyn_ == yyfinal_) goto yyacceptlab; - error_range_[1] = location; - // Using LOCATION is tempting, but would change the location of + yyerror_range_[1] = yylloc; + // Using YYLLOC is tempting, but would change the location of // the look-ahead. YYLOC is available though. - YYLLOC_DEFAULT (yyloc, error_range_ - 1, 2); - semantic_stack_.push (value); - location_stack_.push (yyloc); + YYLLOC_DEFAULT (yyloc, yyerror_range_ - 1, 2); + yysemantic_stack_.push (yylval); + yylocation_stack_.push (yyloc); /* Shift the error token. */ - YY_SYMBOL_PRINT ("Shifting", stos_[n_], - &semantic_stack_[0], &location_stack_[0]); + YY_SYMBOL_PRINT ("Shifting", yystos_[yyn_], + &yysemantic_stack_[0], &yylocation_stack_[0]); - state_ = n_; + yystate_ = yyn_; goto yynewstate; /* Accept. */ @@ -740,66 +818,73 @@ yyacceptlab: /* Abort. */ yyabortlab: /* Free the lookahead. */ - destruct_ ("Error: discarding lookahead", ilooka_, &value, &location); - looka_ = empty_; + yydestruct_ ("Error: discarding lookahead", yyilooka_, &yylval, &yylloc); + yylooka_ = yyempty_; return 1; } void -yy::]b4_parser_class_name[::lex_ () +yy::]b4_parser_class_name[::yylex_ () { + YYCDEBUG << "Reading a token: "; #if YYLSP_NEEDED - looka_ = yylex (&value, &location); + yylooka_ = yylex (&yylval, &yylloc); #else - looka_ = yylex (&value); + yylooka_ = yylex (&yylval); #endif } -/** Generate an error message, and invoke yyerror. */ +// Generate an error message, and invoke error. void -yy::]b4_parser_class_name[::report_syntax_error_ () +yy::]b4_parser_class_name[::yyreport_syntax_error_ () { /* If not already recovering from an error, report this error. */ - if (!errstatus_) + if (!yyerrstatus_) { - ++nerrs_; - + ++yynerrs_; + std::string message; #if YYERROR_VERBOSE - n_ = pact_[state_]; - if (pact_ninf_ < n_ && n_ < last_) + yyn_ = yypact_[yystate_]; + if (yypact_ninf_ < yyn_ && yyn_ < yylast_) { + /* Start YYX at -YYN if negative to avoid negative indexes in + YYCHECK. */ + int yyxbegin = yyn_ < 0 ? -yyn_ : 0; + + /* Stay within bounds of both yycheck and yytname. */ + int yychecklim = yylast_ - yyn_; + int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_; + int count = 0; + for (int x = yyxbegin; x < yyxend; ++x) + if (yycheck_[x + yyn_] == x && x != yyterror_) + ++count; + message = "syntax error, unexpected "; - message += name_[ilooka_]; - { - int count = 0; - for (int x = (n_ < 0 ? -n_ : 0); x < ntokens_ + nnts_; ++x) - if (check_[x + n_] == x && x != terror_) - ++count; - if (count < 5) - { - count = 0; - for (int x = (n_ < 0 ? -n_ : 0); x < ntokens_ + nnts_; ++x) - if (check_[x + n_] == x && x != terror_) - { - message += (!count++) ? ", expecting " : " or "; - message += name_[x]; - } - } - } + message += yyname_[yyilooka_]; + if (count < 5) + { + count = 0; + for (int x = yyxbegin; x < yyxend; ++x) + if (yycheck_[x + yyn_] == x && x != yyterror_) + { + message += (!count++) ? ", expecting " : " or "; + message += yyname_[x]; + } + } } else #endif message = "syntax error"; - error_ (); + error (yylloc, message); } } /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing STATE-NUM. */ -const ]b4_int_type(b4_pact_ninf, b4_pact_ninf) yy::b4_parser_class_name::pact_ninf_ = b4_pact_ninf[; +const ]b4_int_type(b4_pact_ninf, b4_pact_ninf) yy::b4_parser_class_name::yypact_ninf_ = b4_pact_ninf[; const ]b4_int_type_for([b4_pact])[ -yy::]b4_parser_class_name[::pact_[] = +yy::]b4_parser_class_name[::yypact_[] = { ]b4_pact[ }; @@ -808,21 +893,21 @@ yy::]b4_parser_class_name[::pact_[] = doesn't specify something else to do. Zero means the default is an error. */ const ]b4_int_type_for([b4_defact])[ -yy::]b4_parser_class_name[::defact_[] = +yy::]b4_parser_class_name[::yydefact_[] = { ]b4_defact[ }; /* YYPGOTO[NTERM-NUM]. */ const ]b4_int_type_for([b4_pgoto])[ -yy::]b4_parser_class_name[::pgoto_[] = +yy::]b4_parser_class_name[::yypgoto_[] = { ]b4_pgoto[ }; /* YYDEFGOTO[NTERM-NUM]. */ const ]b4_int_type_for([b4_defgoto])[ -yy::]b4_parser_class_name[::defgoto_[] = +yy::]b4_parser_class_name[::yydefgoto_[] = { ]b4_defgoto[ }; @@ -830,16 +915,16 @@ yy::]b4_parser_class_name[::defgoto_[] = /* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If positive, shift that token. If negative, reduce the rule which number is the opposite. If zero, do what YYDEFACT says. */ -const ]b4_int_type(b4_table_ninf, b4_table_ninf) yy::b4_parser_class_name::table_ninf_ = b4_table_ninf[; +const ]b4_int_type(b4_table_ninf, b4_table_ninf) yy::b4_parser_class_name::yytable_ninf_ = b4_table_ninf[; const ]b4_int_type_for([b4_table])[ -yy::]b4_parser_class_name[::table_[] = +yy::]b4_parser_class_name[::yytable_[] = { ]b4_table[ }; /* YYCHECK. */ const ]b4_int_type_for([b4_check])[ -yy::]b4_parser_class_name[::check_[] = +yy::]b4_parser_class_name[::yycheck_[] = { ]b4_check[ }; @@ -847,16 +932,16 @@ yy::]b4_parser_class_name[::check_[] = /* STOS_[STATE-NUM] -- The (internal number of the) accessing symbol of state STATE-NUM. */ const ]b4_int_type_for([b4_stos])[ -yy::]b4_parser_class_name[::stos_[] = +yy::]b4_parser_class_name[::yystos_[] = { ]b4_stos[ }; #if YYDEBUG -/* TOKEN_NUMBER_[YYLEX-NUM] -- Internal token number corresponding +/* TOKEN_NUMBER_[YYLEX-NUM] -- Internal symbol number corresponding to YYLEX-NUM. */ const ]b4_int_type_for([b4_toknum])[ -yy::]b4_parser_class_name[::token_number_[] = +yy::]b4_parser_class_name[::yytoken_number_[] = { ]b4_toknum[ }; @@ -864,23 +949,23 @@ yy::]b4_parser_class_name[::token_number_[] = /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */ const ]b4_int_type_for([b4_r1])[ -yy::]b4_parser_class_name[::r1_[] = +yy::]b4_parser_class_name[::yyr1_[] = { ]b4_r1[ }; /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */ const ]b4_int_type_for([b4_r2])[ -yy::]b4_parser_class_name[::r2_[] = +yy::]b4_parser_class_name[::yyr2_[] = { ]b4_r2[ }; #if YYDEBUG || YYERROR_VERBOSE /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. - First, the terminals, then, starting at NTOKENS_, nonterminals. */ + First, the terminals, then, starting at \a yyntokens_, nonterminals. */ const char* -const yy::]b4_parser_class_name[::name_[] = +const yy::]b4_parser_class_name[::yyname_[] = { ]b4_tname[ }; @@ -888,8 +973,8 @@ const yy::]b4_parser_class_name[::name_[] = #if YYDEBUG /* YYRHS -- A `-1'-separated list of the rules' RHS. */ -const yy::]b4_parser_class_name[::RhsNumberType -yy::]b4_parser_class_name[::rhs_[] = +const yy::]b4_parser_class_name[::rhs_number_type +yy::]b4_parser_class_name[::yyrhs_[] = { ]b4_rhs[ }; @@ -897,78 +982,76 @@ yy::]b4_parser_class_name[::rhs_[] = /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in YYRHS. */ const ]b4_int_type_for([b4_prhs])[ -yy::]b4_parser_class_name[::prhs_[] = +yy::]b4_parser_class_name[::yyprhs_[] = { ]b4_prhs[ }; -/* YYRLINE[YYN] -- source line where rule number YYN was defined. */ +/* YYRLINE[YYN] -- Source line where rule number YYN was defined. */ const ]b4_int_type_for([b4_rline])[ -yy::]b4_parser_class_name[::rline_[] = +yy::]b4_parser_class_name[::yyrline_[] = { ]b4_rline[ }; -/** Print the state stack from its BOTTOM up to its TOP (included). */ - +// Print the state stack on the debug stream. void -yy::]b4_parser_class_name[::stack_print_ () +yy::]b4_parser_class_name[::yystack_print_ () { - cdebug_ << "Stack now"; - for (StateStack::const_iterator i = state_stack_.begin (); - i != state_stack_.end (); ++i) - cdebug_ << ' ' << *i; - cdebug_ << std::endl; + *yycdebug_ << "Stack now"; + for (state_stack_type::const_iterator i = yystate_stack_.begin (); + i != yystate_stack_.end (); ++i) + *yycdebug_ << ' ' << *i; + *yycdebug_ << std::endl; } -/** Report that the YYRULE is going to be reduced. */ - +// Report on the debug stream that the rule \a yyrule is going to be reduced. void -yy::]b4_parser_class_name[::reduce_print_ (int yyrule) +yy::]b4_parser_class_name[::yyreduce_print_ (int yyrule) { - unsigned int yylno = rline_[yyrule]; + unsigned int yylno = yyrline_[yyrule]; /* Print the symbols being reduced, and their result. */ - cdebug_ << "Reducing stack by rule " << n_ - 1 - << " (line " << yylno << "), "; - for (]b4_int_type_for([b4_prhs])[ i = prhs_[n_]; - 0 <= rhs_[i]; ++i) - cdebug_ << name_[rhs_[i]] << ' '; - cdebug_ << "-> " << name_[r1_[n_]] << std::endl; + *yycdebug_ << "Reducing stack by rule " << yyn_ - 1 + << " (line " << yylno << "), "; + for (]b4_int_type_for([b4_prhs])[ i = yyprhs_[yyn_]; + 0 <= yyrhs_[i]; ++i) + *yycdebug_ << yyname_[yyrhs_[i]] << ' '; + *yycdebug_ << "-> " << yyname_[yyr1_[yyn_]] << std::endl; } #endif // YYDEBUG /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */ -yy::]b4_parser_class_name[::TokenNumberType -yy::]b4_parser_class_name[::translate_ (int token) +yy::]b4_parser_class_name[::token_number_type +yy::]b4_parser_class_name[::yytranslate_ (int token) { static - const TokenNumberType + const token_number_type translate_table[] = { ]b4_translate[ }; - if ((unsigned int) token <= user_token_number_max_) + if ((unsigned int) token <= yyuser_token_number_max_) return translate_table[token]; else - return undef_token_; + return yyundef_token_; } -const int yy::]b4_parser_class_name[::eof_ = 0; -const int yy::]b4_parser_class_name[::last_ = ]b4_last[; -const int yy::]b4_parser_class_name[::nnts_ = ]b4_nterms_number[; -const int yy::]b4_parser_class_name[::empty_ = -2; -const int yy::]b4_parser_class_name[::final_ = ]b4_final_state_number[; -const int yy::]b4_parser_class_name[::terror_ = 1; -const int yy::]b4_parser_class_name[::errcode_ = 256; -const int yy::]b4_parser_class_name[::ntokens_ = ]b4_tokens_number[; +const int yy::]b4_parser_class_name[::yyeof_ = 0; +const int yy::]b4_parser_class_name[::yylast_ = ]b4_last[; +const int yy::]b4_parser_class_name[::yynnts_ = ]b4_nterms_number[; +const int yy::]b4_parser_class_name[::yyempty_ = -2; +const int yy::]b4_parser_class_name[::yyfinal_ = ]b4_final_state_number[; +const int yy::]b4_parser_class_name[::yyterror_ = 1; +const int yy::]b4_parser_class_name[::yyerrcode_ = 256; +const int yy::]b4_parser_class_name[::yyntokens_ = ]b4_tokens_number[; -const unsigned int yy::]b4_parser_class_name[::user_token_number_max_ = ]b4_user_token_number_max[; -const yy::]b4_parser_class_name[::TokenNumberType yy::]b4_parser_class_name[::undef_token_ = ]b4_undef_token_number[; +const unsigned int yy::]b4_parser_class_name[::yyuser_token_number_max_ = ]b4_user_token_number_max[; +const yy::]b4_parser_class_name[::token_number_type yy::]b4_parser_class_name[::yyundef_token_ = ]b4_undef_token_number[; ]b4_epilogue dnl @output stack.hh -b4_copyright([Stack handling for Bison C++ parsers], [2002, 2003, 2004])[ +b4_copyright([stack handling for Bison C++ parsers], [2002, 2003, 2004])[ #ifndef BISON_STACK_HH # define BISON_STACK_HH @@ -978,7 +1061,7 @@ b4_copyright([Stack handling for Bison C++ parsers], [2002, 2003, 2004])[ namespace yy { template > - class Stack + class stack { public: @@ -986,11 +1069,11 @@ namespace yy typedef typename S::reverse_iterator iterator; typedef typename S::const_reverse_iterator const_iterator; - Stack () : seq_ () + stack () : seq_ () { } - Stack (unsigned int n) : seq_ (n) + stack (unsigned int n) : seq_ (n) { } @@ -1038,12 +1121,13 @@ namespace yy S seq_; }; - template > - class Slice + /// Present a slice of the top of a stack. + template > + class slice { public: - Slice (const S& stack, + slice (const S& stack, unsigned int range) : stack_ (stack), range_ (range) { @@ -1070,7 +1154,7 @@ b4_copyright([Position class for Bison C++ parsers], [2002, 2003, 2004])[ /** ** \file position.hh - ** Define the Location class. + ** Define the position class. */ #ifndef BISON_POSITION_HH @@ -1081,21 +1165,21 @@ b4_copyright([Position class for Bison C++ parsers], [2002, 2003, 2004])[ namespace yy { - /** \brief Abstract a Position. */ - class Position + /// Abstract a position. + class position { public: - /** \brief Initial column number. */ + /// Initial column number. static const unsigned int initial_column = 0; - /** \brief Initial line number. */ + /// Initial line number. static const unsigned int initial_line = 1; /** \name Ctor & dtor. ** \{ */ public: - /** \brief Construct a Position. */ - Position () : - filename (), + /// Construct a position. + position () : + filename (0), line (initial_line), column (initial_column) { @@ -1106,14 +1190,14 @@ namespace yy /** \name Line and Column related manipulators ** \{ */ public: - /** \brief (line related) Advance to the COUNT next lines. */ + /// (line related) Advance to the COUNT next lines. inline void lines (int count = 1) { column = initial_column; line += count; } - /** \brief (column related) Advance to the COUNT next columns. */ + /// (column related) Advance to the COUNT next columns. inline void columns (int count = 1) { int leftmost = initial_column; @@ -1126,53 +1210,53 @@ namespace yy /** \} */ public: - /** \brief File name to which this position refers. */ - std::string filename; - /** \brief Current line number. */ + /// File name to which this position refers. + ]b4_filename_type[* filename; + /// Current line number. unsigned int line; - /** \brief Current column number. */ + /// Current column number. unsigned int column; }; - /** \brief Add and assign a Position. */ - inline const Position& - operator+= (Position& res, const int width) + /// Add and assign a position. + inline const position& + operator+= (position& res, const int width) { res.columns (width); return res; } - /** \brief Add two Position objects. */ - inline const Position - operator+ (const Position& begin, const int width) + /// Add two position objects. + inline const position + operator+ (const position& begin, const int width) { - Position res = begin; + position res = begin; return res += width; } - /** \brief Add and assign a Position. */ - inline const Position& - operator-= (Position& res, const int width) + /// Add and assign a position. + inline const position& + operator-= (position& res, const int width) { return res += -width; } - /** \brief Add two Position objects. */ - inline const Position - operator- (const Position& begin, const int width) + /// Add two position objects. + inline const position + operator- (const position& begin, const int width) { return begin + -width; } /** \brief Intercept output stream redirection. ** \param ostr the destination output stream - ** \param pos a reference to the Position to redirect + ** \param pos a reference to the position to redirect */ inline std::ostream& - operator<< (std::ostream& ostr, const Position& pos) + operator<< (std::ostream& ostr, const position& pos) { - if (!pos.filename.empty ()) - ostr << pos.filename << ':'; + if (pos.filename) + ostr << *pos.filename << ':'; return ostr << pos.line << '.' << pos.column; } @@ -1183,7 +1267,7 @@ b4_copyright([Location class for Bison C++ parsers], [2002, 2003, 2004])[ /** ** \file location.hh - ** Define the Location class. + ** Define the location class. */ #ifndef BISON_LOCATION_HH @@ -1196,14 +1280,14 @@ b4_copyright([Location class for Bison C++ parsers], [2002, 2003, 2004])[ namespace yy { - /** \brief Abstract a Location. */ - class Location + /// Abstract a location. + class location { /** \name Ctor & dtor. ** \{ */ public: - /** \brief Construct a Location. */ - Location (void) : + /// Construct a location. + location () : begin (), end () { @@ -1214,19 +1298,19 @@ namespace yy /** \name Line and Column related manipulators ** \{ */ public: - /** \brief Reset initial location to final location. */ - inline void step (void) + /// Reset initial location to final location. + inline void step () { begin = end; } - /** \brief Extend the current location to the COUNT next columns. */ + /// Extend the current location to the COUNT next columns. inline void columns (unsigned int count = 1) { end += count; } - /** \brief Extend the current location to the COUNT next lines. */ + /// Extend the current location to the COUNT next lines. inline void lines (unsigned int count = 1) { end.lines (count); @@ -1235,30 +1319,30 @@ namespace yy public: - /** \brief Beginning of the located region. */ - Position begin; - /** \brief End of the located region. */ - Position end; + /// Beginning of the located region. + position begin; + /// End of the located region. + position end; }; - /** \brief Join two Location objects to create a Location. */ - inline const Location operator+ (const Location& begin, const Location& end) + /// Join two location objects to create a location. + inline const location operator+ (const location& begin, const location& end) { - Location res = begin; + location res = begin; res.end = end.end; return res; } - /** \brief Add two Location objects */ - inline const Location operator+ (const Location& begin, unsigned int width) + /// Add two location objects. + inline const location operator+ (const location& begin, unsigned int width) { - Location res = begin; + location res = begin; res.columns (width); return res; } - /** \brief Add and assign a Location */ - inline Location& operator+= (Location& res, unsigned int width) + /// Add and assign a location. + inline location& operator+= (location& res, unsigned int width) { res.columns (width); return res; @@ -1266,15 +1350,17 @@ namespace yy /** \brief Intercept output stream redirection. ** \param ostr the destination output stream - ** \param loc a reference to the Location to redirect + ** \param loc a reference to the location to redirect ** ** Avoid duplicate information. */ - inline std::ostream& operator<< (std::ostream& ostr, const Location& loc) + inline std::ostream& operator<< (std::ostream& ostr, const location& loc) { - Position last = loc.end - 1; + position last = loc.end - 1; ostr << loc.begin; - if (loc.begin.filename != last.filename) + if (last.filename + && (!loc.begin.filename + || *loc.begin.filename != *last.filename)) ostr << '-' << last; else if (loc.begin.line != last.line) ostr << '-' << last.line << '.' << last.column;