X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/b47dbebee51e9d093e140e78b6bedaf065a01c8c..98ae96438ebb4465c777a7849f1b4ca222e760e3:/data/lalr1.cc diff --git a/data/lalr1.cc b/data/lalr1.cc index 0b6ca5d9..887671d1 100644 --- a/data/lalr1.cc +++ b/data/lalr1.cc @@ -19,95 +19,8 @@ m4_divert(-1) # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA # 02110-1301 USA -## ---------------- ## -## Default values. ## -## ---------------- ## - -# Default parser class name. -m4_define_default([b4_parser_class_name], [parser]) - - - -## ----------------- ## -## Semantic Values. ## -## ----------------- ## - - -# b4_lhs_value([TYPE]) -# -------------------- -# Expansion of $$. -m4_define([b4_lhs_value], -[(yyval[]m4_ifval([$1], [.$1]))]) - - -# b4_rhs_value(RULE-LENGTH, NUM, [TYPE]) -# -------------------------------------- -# Expansion of $NUM, where the current rule has RULE-LENGTH -# symbols on RHS. -m4_define([b4_rhs_value], -[(yysemantic_stack_@{m4_eval([$1 - $2])@}m4_ifval([$3], [.$3]))]) - -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)]) - - -# b4_rhs_location(RULE-LENGTH, NUM) -# --------------------------------- -# Expansion of @NUM, where the current rule has RULE-LENGTH symbols -# on RHS. -m4_define([b4_rhs_location], -[(yylocation_stack_@{m4_eval([$1 - $2])@})]) - - -# b4_parse_param_decl -# ------------------- -# Extra formal arguments of the constructor. -# Change the parameter names from "foo" into "foo_yyarg", so that -# there is no collision bw the user chosen attribute name, and the -# 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_define([b4_parse_param_decl_1], -[$1_yyarg]) - - - -# b4_parse_param_cons -# ------------------- -# Extra initialisations of the constructor. -m4_define([b4_parse_param_cons], - [m4_ifset([b4_parse_param], - [, - b4_cc_constructor_calls(b4_parse_param)])]) -m4_define([b4_cc_constructor_calls], - [m4_map_sep([b4_cc_constructor_call], [, - ], [$@])]) -m4_define([b4_cc_constructor_call], - [$2 ($2_yyarg)]) - -# b4_parse_param_vars -# ------------------- -# Extra instance variables. -m4_define([b4_parse_param_vars], - [m4_ifset([b4_parse_param], - [ - /* User arguments. */ -b4_cc_var_decls(b4_parse_param)])]) -m4_define([b4_cc_var_decls], - [m4_map_sep([b4_cc_var_decl], [ -], [$@])]) -m4_define([b4_cc_var_decl], - [ $1;]) - - +m4_include(b4_pkgdatadir/[c++.m4]) +m4_include(b4_pkgdatadir/[location.cc]) # We do want M4 expansion after # for CPP macros. m4_changecom() @@ -115,17 +28,15 @@ m4_divert(0)dnl m4_if(b4_defines_flag, 0, [], [@output @output_header_name@ b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison], - [2002, 2003, 2004, 2005])[ -/* FIXME: This is wrong, we want computed header guards. - I don't know why the macros are missing now. :( */ + [2002, 2003, 2004, 2005]) +dnl FIXME: This is wrong, we want computed header guards. +[ #ifndef PARSER_HEADER_H # define PARSER_HEADER_H #include #include - -/* Using locations. */ -#define YYLSP_NEEDED ]b4_locations_flag[ +#include "stack.hh" namespace yy { @@ -133,16 +44,14 @@ namespace yy class location; } -]b4_token_defines(b4_tokens)[ - -/* Copy the first part of user declarations. */ +/* First part of user declarations. */ ]b4_pre_prologue[ ]/* Line __line__ of lalr1.cc. */ b4_syncline([@oline@], [@ofile@])[ -#include "stack.hh" -#include "location.hh" +]dnl Include location.hh here: it might depend on headers included above. +[#include "location.hh" /* Enabling traces. */ #ifndef YYDEBUG @@ -162,23 +71,6 @@ b4_syncline([@oline@], [@ofile@])[ # define YYTOKEN_TABLE ]b4_token_table[ #endif -#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED) -]m4_ifdef([b4_stype], -[b4_syncline([b4_stype_line], [b4_file_name]) -union YYSTYPE b4_stype; -/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])], -[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. */ -]b4_post_prologue[ - -]/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])[ /* 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). */ @@ -195,50 +87,38 @@ do { \ { \ (Current).begin = (Current).end = (Rhs)[0].end; \ } \ -} while (0) +} while (false) #endif namespace yy { - class ]b4_parser_class_name[; - template - struct traits - { - }; - - template <> - struct traits<]b4_parser_class_name[> - { - 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 -{ /// A Bison parser. class ]b4_parser_class_name[ { + public: /// Symbol semantic values. - typedef traits<]b4_parser_class_name[>::semantic_type semantic_type; +#if ! defined (YYSTYPE) +]m4_ifdef([b4_stype], +[b4_syncline([b4_stype_line], [b4_file_name]) + union semantic_type b4_stype; +/* Line __line__ of lalr1.cc. */ +b4_syncline([@oline@], [@ofile@])], +[ typedef int semantic_type;])[ +#else + typedef YYSTYPE semantic_type; +#endif /// Symbol locations. - typedef traits<]b4_parser_class_name[>::location_type location_type; - - public: - /// Build a parser object. - ]b4_parser_class_name[ (]b4_parse_param_decl[) : - yydebug_ (false), - yycdebug_ (&std::cerr)]b4_parse_param_cons[ + typedef ]b4_location_type[ location_type; + /// Tokens. + struct token { - } + ]b4_token_enums(b4_tokens)[ + }; - virtual ~]b4_parser_class_name[ () - { - } + /// Build a parser object. + ]b4_parser_class_name[ (]b4_parse_param_decl[); + virtual ~]b4_parser_class_name[ (); /// Parse. /// \returns 0 iff parsing succeeded. @@ -257,17 +137,16 @@ namespace yy void set_debug_level (debug_level_type l); private: - - /// 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_ (); + /// Generate an error message. + /// \param state the state where the error occurred. + /// \param tok the look-ahead token. + virtual std::string yysyntax_error_ (int yystate]dnl +b4_error_verbose_if([, int tok])[); #if YYDEBUG /// \brief Report a symbol on the debug stream. @@ -281,7 +160,7 @@ namespace yy /// State numbers. - typedef traits<]b4_parser_class_name[>::state_type state_type; + typedef int state_type; /// State stack type. typedef stack state_stack_type; /// Semantic value stack type. @@ -297,7 +176,7 @@ namespace yy location_stack_type yylocation_stack_; /// Internal symbol numbers. - typedef traits<]b4_parser_class_name[>::token_number_type token_number_type; + typedef ]b4_int_type_for([b4_translate])[ token_number_type; /* Tables. */ /// For a state, the index in \a yytable_ of its portion. static const ]b4_int_type_for([b4_pact])[ yypact_[]; @@ -341,7 +220,7 @@ namespace yy #if YYDEBUG /// A type to store symbol numbers and -1. - typedef traits<]b4_parser_class_name[>::rhs_number_type rhs_number_type; + typedef ]b4_int_type_for([b4_rhs])[ 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_. @@ -385,38 +264,22 @@ namespace yy static const unsigned int yyuser_token_number_max_; static const token_number_type yyundef_token_; - /* State. */ - int yyn_; - int yylen_; - int yystate_; - - /* Error handling. */ - int yynerrs_; - int yyerrstatus_; - /* Debugging. */ int yydebug_; std::ostream* yycdebug_; - /* Look-ahead and look-ahead in internal form. */ - int yylooka_; - int yyilooka_; - - /// Semantic value of the look-ahead. - semantic_type yylval; - /// Location of the look-ahead. - location_type yylloc; - /// The locations where the error started and ended. - location yyerror_range_[2]; - - /// $$. - semantic_type yyval; - /// @@$. - location_type yyloc; ]b4_parse_param_vars[ }; } +]m4_ifset([b4_global_tokens_and_yystype], +[b4_token_defines(b4_tokens) + +#ifndef YYSTYPE + /* Redirection for backward compatibility. */ +# define YYSTYPE yy::b4_parser_class_name::semantic_type +#endif +])[ #endif /* ! defined PARSER_HEADER_H */] ])dnl @output @output_parser_name@ @@ -430,6 +293,12 @@ m4_if(b4_defines_flag, 0, [], [ #include @output_header_name@])[ +/* User implementation prologue. */ +]b4_post_prologue[ + +]/* Line __line__ of lalr1.cc. */ +b4_syncline([@oline@], [@ofile@])[ + #ifndef YY_ # if YYENABLE_NLS # if ENABLE_NLS @@ -442,6 +311,9 @@ m4_if(b4_defines_flag, 0, [], # endif #endif +/* Suppress unused-variable warnings by "using" E. */ +#define YYUSE(e) do {;} while (false && (e)) + /* A pseudo ostream that takes yydebug_ into account. */ # define YYCDEBUG \ for (bool yydebugcond_ = yydebug_; yydebugcond_; yydebugcond_ = false) \ @@ -458,19 +330,19 @@ do { \ yysymprint_ ((Type), (Value), (Location)); \ *yycdebug_ << std::endl; \ } \ -} while (0) +} while (false) # define YY_REDUCE_PRINT(Rule) \ do { \ if (yydebug_) \ yyreduce_print_ (Rule); \ -} while (0) +} while (false) # define YY_STACK_PRINT() \ do { \ if (yydebug_) \ yystack_print_ (); \ -} while (0) +} while (false) #else /* !YYDEBUG */ @@ -525,609 +397,634 @@ yy::]b4_parser_class_name[::yytnamerr_ (const char *yystr) #endif +namespace yy +{ + /// Build a parser object. + ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[) + : yydebug_ (false), + yycdebug_ (&std::cerr)]b4_parse_param_cons[ + { + } + + ]b4_parser_class_name::~b4_parser_class_name[ () + { + } + #if YYDEBUG -/*--------------------------------. -| Print this symbol on YYOUTPUT. | -`--------------------------------*/ + /*--------------------------------. + | Print this symbol on YYOUTPUT. | + `--------------------------------*/ -void -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_; - - *yycdebug_ << (yytype < yyntokens_ ? "token" : "nterm") - << ' ' << yytname_[yytype] << " (" - << *yylocationp << ": "; - switch (yytype) - { -]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl -[ default: - break; - } - *yycdebug_ << ')'; -} + void + ]b4_parser_class_name[::yysymprint_ (int yytype, + const semantic_type* yyvaluep, const location_type* yylocationp) + { + /* Backward compatibility, but should be removed eventually. */ + std::ostream& cdebug_ = *yycdebug_; + + YYUSE (!&cdebug_); + YYUSE (yylocationp); + YYUSE (yyvaluep); + + *yycdebug_ << (yytype < yyntokens_ ? "token" : "nterm") + << ' ' << yytname_[yytype] << " (" + << *yylocationp << ": "; + switch (yytype) + { + ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl +[ default: + break; + } + *yycdebug_ << ')'; + } #endif /* ! YYDEBUG */ -void -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; + void + ]b4_parser_class_name[::yydestruct_ (const char* yymsg, + int yytype, semantic_type* yyvaluep, location_type* yylocationp) + { + YYUSE (yylocationp); + YYUSE (yymsg); + YYUSE (yyvaluep); + + YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp); + + switch (yytype) + { + ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[ + default: + break; + } + } - YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp); + void + ]b4_parser_class_name[::yypop_ (unsigned int n) + { + yystate_stack_.pop (n); + yysemantic_stack_.pop (n); + yylocation_stack_.pop (n); + } - switch (yytype) - { -]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[ - default: - break; - } -} + std::ostream& + ]b4_parser_class_name[::debug_stream () const + { + return *yycdebug_; + } -void -yy::]b4_parser_class_name[::yypop_ (unsigned int n) -{ - yystate_stack_.pop (n); - yysemantic_stack_.pop (n); - yylocation_stack_.pop (n); -} + void + ]b4_parser_class_name[::set_debug_stream (std::ostream& o) + { + yycdebug_ = &o; + } -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; -} + ]b4_parser_class_name[::debug_level_type + ]b4_parser_class_name[::debug_level () const + { + return yydebug_; + } + void + ]b4_parser_class_name[::set_debug_level (debug_level_type l) + { + yydebug_ = l; + } -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 + ]b4_parser_class_name[::parse () + { + /// Look-ahead and look-ahead in internal form. + int yychar = yyempty_; + int yytoken = 0; + /* State. */ + int yyn; + int yylen; + int yystate = 0; -int -yy::]b4_parser_class_name[::parse () -{ - int yyresult_; + /* Error handling. */ + int yynerrs_ = 0; + int yyerrstatus_ = 0; + + /// Semantic value of the look-ahead. + semantic_type yylval; + /// Location of the look-ahead. + location_type yylloc; + /// The locations where the error started and ended. + location yyerror_range[2]; - YYCDEBUG << "Starting parse" << std::endl; + /// $$. + semantic_type yyval; + /// @@$. + location_type yyloc; - yynerrs_ = 0; - yyerrstatus_ = 0; + int yyresult; - /* Start. */ - yystate_ = 0; - yylooka_ = yyempty_; + YYCDEBUG << "Starting parse" << std::endl; ]m4_ifdef([b4_initial_action], [ m4_pushdef([b4_at_dollar], [yylloc])dnl m4_pushdef([b4_dollar_dollar], [yylval])dnl - /* User initialization code. */ - b4_initial_action + /* User initialization code. */ + b4_initial_action m4_popdef([b4_dollar_dollar])dnl m4_popdef([b4_at_dollar])dnl -/* Line __line__ of yacc.c. */ + /* Line __line__ of yacc.c. */ b4_syncline([@oline@], [@ofile@])])dnl -[ /* Initialize the stacks. The initial state will be pushed in - yynewstate, since the latter expects the semantical and the - location values to have been already stored, initialize these - stacks with a primary value. */ - 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: - yystate_stack_.push (yystate_); - YYCDEBUG << "Entering state " << yystate_ << std::endl; - goto yybackup; - - /* Backup. */ -yybackup: - - /* Try to take a decision without look-ahead. */ - yyn_ = yypact_[yystate_]; - if (yyn_ == yypact_ninf_) - goto yydefault; - - /* Read a look-ahead token. */ - if (yylooka_ == yyempty_) - yylex_ (); - - /* Convert token to internal form. */ - if (yylooka_ <= yyeof_) - { - yylooka_ = yyilooka_ = yyeof_; - YYCDEBUG << "Now at end of input." << std::endl; - } - else - { - 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. */ - yyn_ += yyilooka_; - if (yyn_ < 0 || yylast_ < yyn_ || yycheck_[yyn_] != yyilooka_) - goto yydefault; + [ /* Initialize the stacks. The initial state will be pushed in + yynewstate, since the latter expects the semantical and the + location values to have been already stored, initialize these + stacks with a primary value. */ + 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: + yystate_stack_.push (yystate); + YYCDEBUG << "Entering state " << yystate << std::endl; + goto yybackup; + + /* Backup. */ + yybackup: + + /* Try to take a decision without look-ahead. */ + yyn = yypact_[yystate]; + if (yyn == yypact_ninf_) + goto yydefault; + + /* Read a look-ahead token. */ + if (yychar == yyempty_) + { + YYCDEBUG << "Reading a token: "; + yychar = ]b4_c_function_call([yylex], [int], + [[YYSTYPE*], [&yylval]][]dnl +b4_location_if([, [[location*], [&yylloc]]])dnl +m4_ifdef([b4_lex_param], [, ]b4_lex_param))[; + } + + + /* Convert token to internal form. */ + if (yychar <= yyeof_) + { + yychar = yytoken = yyeof_; + YYCDEBUG << "Now at end of input." << std::endl; + } + else + { + yytoken = yytranslate_ (yychar); + YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc); + } + + /* If the proper action on seeing token YYTOKEN is to reduce or to + detect an error, take that action. */ + yyn += yytoken; + if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yytoken) + goto yydefault; + + /* Reduce or error. */ + yyn = yytable_[yyn]; + if (yyn <= 0) + { + if (yyn == 0 || yyn == yytable_ninf_) + goto yyerrlab; + yyn = -yyn; + goto yyreduce; + } + + /* Accept? */ + if (yyn == yyfinal_) + goto yyacceptlab; + + /* Shift the look-ahead token. */ + YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc); + + /* Discard the token being shifted unless it is eof. */ + if (yychar != yyeof_) + yychar = yyempty_; + + yysemantic_stack_.push (yylval); + yylocation_stack_.push (yylloc); + + /* Count tokens shifted since error; after three, turn off error + status. */ + if (yyerrstatus_) + --yyerrstatus_; + + yystate = yyn; + goto yynewstate; + + /*-----------------------------------------------------------. + | yydefault -- do the default action for the current state. | + `-----------------------------------------------------------*/ + yydefault: + yyn = yydefact_[yystate]; + if (yyn == 0) + goto yyerrlab; + goto yyreduce; + + /*-----------------------------. + | yyreduce -- Do a reduction. | + `-----------------------------*/ + yyreduce: + 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 (yylen) + yyval = yysemantic_stack_[yylen - 1]; + else + yyval = yysemantic_stack_[0]; - /* Reduce or error. */ - yyn_ = yytable_[yyn_]; - if (yyn_ < 0) { - if (yyn_ == yytable_ninf_) - goto yyerrlab; - else - { - yyn_ = -yyn_; - goto yyreduce; - } + slice slice (yylocation_stack_, yylen); + YYLLOC_DEFAULT (yyloc, slice, yylen); } - else if (yyn_ == 0) - goto yyerrlab; - - /* Accept? */ - if (yyn_ == yyfinal_) - goto yyacceptlab; - - /* Shift the look-ahead token. */ - YY_SYMBOL_PRINT ("Shifting", yyilooka_, &yylval, &yylloc); - - /* Discard the token being shifted unless it is eof. */ - if (yylooka_ != yyeof_) - yylooka_ = yyempty_; - - yysemantic_stack_.push (yylval); - yylocation_stack_.push (yylloc); - - /* Count tokens shifted since error; after three, turn off error - status. */ - if (yyerrstatus_) - --yyerrstatus_; - - yystate_ = yyn_; - goto yynewstate; - -/*-----------------------------------------------------------. -| yydefault -- do the default action for the current state. | -`-----------------------------------------------------------*/ -yydefault: - yyn_ = yydefact_[yystate_]; - if (yyn_ == 0) - goto yyerrlab; - goto yyreduce; - -/*-----------------------------. -| yyreduce -- Do a reduction. | -`-----------------------------*/ -yyreduce: - 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 (yylen_) - yyval = yysemantic_stack_[yylen_ - 1]; - else - yyval = yysemantic_stack_[0]; + YY_REDUCE_PRINT (yyn); + switch (yyn) + { + ]b4_actions[ + default: break; + } + + ]/* Line __line__ of lalr1.cc. */ + b4_syncline([@oline@], [@ofile@])[ + + yypop_ (yylen); + + YY_STACK_PRINT (); + + yysemantic_stack_.push (yyval); + yylocation_stack_.push (yyloc); + + /* Shift the result of the reduction. */ + yyn = yyr1_[yyn]; + yystate = yypgoto_[yyn - yyntokens_] + yystate_stack_[0]; + if (0 <= yystate && yystate <= yylast_ + && yycheck_[yystate] == yystate_stack_[0]) + yystate = yytable_[yystate]; + else + yystate = yydefgoto_[yyn - yyntokens_]; + goto yynewstate; + + /*------------------------------------. + | yyerrlab -- here on detecting error | + `------------------------------------*/ + yyerrlab: + /* If not already recovering from an error, report this error. */ + if (!yyerrstatus_) + { + ++yynerrs_; + error (yylloc, yysyntax_error_ (yystate]dnl +b4_error_verbose_if([, yytoken])[)); + } + + yyerror_range[0] = yylloc; + if (yyerrstatus_ == 3) + { + /* If just tried and failed to reuse look-ahead token after an + error, discard it. */ + + if (yychar <= yyeof_) + { + /* Return failure if at end of input. */ + if (yychar == yyeof_) + YYABORT; + } + else + { + yydestruct_ ("Error: discarding", yytoken, &yylval, &yylloc); + yychar = yyempty_; + } + } + + /* Else will try to reuse look-ahead token after shifting the error + token. */ + goto yyerrlab1; + + + /*---------------------------------------------------. + | yyerrorlab -- error raised explicitly by YYERROR. | + `---------------------------------------------------*/ + yyerrorlab: + + /* 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; + + 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: + yyerrstatus_ = 3; /* Each real token shifted decrements this. */ + + for (;;) + { + yyn = yypact_[yystate]; + if (yyn != yypact_ninf_) + { + yyn += yyterror_; + if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_) + { + yyn = yytable_[yyn]; + if (0 < yyn) + break; + } + } + + /* Pop the current state because it cannot handle the error token. */ + if (yystate_stack_.height () == 1) + YYABORT; + + 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 (yyn == yyfinal_) + goto yyacceptlab; + + yyerror_range[1] = yylloc; + // Using YYLLOC is tempting, but would change the location of + // the look-ahead. YYLOC is available though. + YYLLOC_DEFAULT (yyloc, yyerror_range - 1, 2); + yysemantic_stack_.push (yylval); + yylocation_stack_.push (yyloc); + + /* Shift the error token. */ + YY_SYMBOL_PRINT ("Shifting", yystos_[yyn], + &yysemantic_stack_[0], &yylocation_stack_[0]); + + yystate = yyn; + goto yynewstate; + + /* Accept. */ + yyacceptlab: + yyresult = 0; + goto yyreturn; + + /* Abort. */ + yyabortlab: + yyresult = 1; + goto yyreturn; + + yyreturn: + if (yychar != yyeof_ && yychar != yyempty_) + yydestruct_ ("Cleanup: discarding lookahead", yytoken, &yylval, &yylloc); + + while (yystate_stack_.height () != 1) + { + yydestruct_ ("Cleanup: popping", + yystos_[yystate_stack_[0]], + &yysemantic_stack_[0], + &yylocation_stack_[0]); + yypop_ (); + } + + return yyresult; + } + // Generate an error message. + std::string + ]b4_parser_class_name[::yysyntax_error_ (int yystate]dnl +b4_error_verbose_if([, int tok])[) { - slice slice (yylocation_stack_, yylen_); - YYLLOC_DEFAULT (yyloc, slice, yylen_); + std::string res; +#if YYERROR_VERBOSE + int 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; + + // FIXME: This method of building the message is not compatible + // with internationalization. It should work like yacc.c does it. + // That is, first build a string that looks like this: + // "syntax error, unexpected %s or %s or %s" + // Then, invoke YY_ on this string. + // Finally, use the string as a format to output + // yytname_[tok], etc. + // Until this gets fixed, this message appears in English only. + res = "syntax error, unexpected "; + res += yytnamerr_ (yytname_[tok]); + if (count < 5) + { + count = 0; + for (int x = yyxbegin; x < yyxend; ++x) + if (yycheck_[x + yyn] == x && x != yyterror_) + { + res += (!count++) ? ", expecting " : " or "; + res += yytnamerr_ (yytname_[x]); + } + } + } + else +#endif + res = YY_("syntax error"); + return res; } - YY_REDUCE_PRINT (yyn_); - switch (yyn_) - { - ]b4_actions[ - default: break; - } - -]/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])[ - - yypop_ (yylen_); - - YY_STACK_PRINT (); - - yysemantic_stack_.push (yyval); - yylocation_stack_.push (yyloc); - - /* Shift the result of the reduction. */ - yyn_ = yyr1_[yyn_]; - yystate_ = yypgoto_[yyn_ - yyntokens_] + yystate_stack_[0]; - if (0 <= yystate_ && yystate_ <= yylast_ - && yycheck_[yystate_] == yystate_stack_[0]) - yystate_ = yytable_[yystate_]; - else - yystate_ = yydefgoto_[yyn_ - yyntokens_]; - goto yynewstate; - -/*------------------------------------. -| yyerrlab -- here on detecting error | -`------------------------------------*/ -yyerrlab: - /* If not already recovering from an error, report this error. */ - yyreport_syntax_error_ (); - - yyerror_range_[0] = yylloc; - if (yyerrstatus_ == 3) - { - /* If just tried and failed to reuse look-ahead token after an - error, discard it. */ - - if (yylooka_ <= yyeof_) - { - /* Return failure if at end of input. */ - if (yylooka_ == yyeof_) - YYABORT; - } - else - { - yydestruct_ ("Error: discarding", yyilooka_, &yylval, &yylloc); - yylooka_ = yyempty_; - } - } - - /* Else will try to reuse look-ahead token after shifting the error - token. */ - goto yyerrlab1; -/*---------------------------------------------------. -| yyerrorlab -- error raised explicitly by YYERROR. | -`---------------------------------------------------*/ -yyerrorlab: - - /* 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; - - 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: - yyerrstatus_ = 3; /* Each real token shifted decrements this. */ - - for (;;) - { - yyn_ = yypact_[yystate_]; - if (yyn_ != yypact_ninf_) - { - yyn_ += yyterror_; - if (0 <= yyn_ && yyn_ <= yylast_ && yycheck_[yyn_] == yyterror_) - { - yyn_ = yytable_[yyn_]; - if (0 < yyn_) - break; - } - } - - /* Pop the current state because it cannot handle the error token. */ - if (yystate_stack_.height () == 1) - YYABORT; - - 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 (yyn_ == yyfinal_) - goto yyacceptlab; - - yyerror_range_[1] = yylloc; - // Using YYLLOC is tempting, but would change the location of - // the look-ahead. YYLOC is available though. - YYLLOC_DEFAULT (yyloc, yyerror_range_ - 1, 2); - yysemantic_stack_.push (yylval); - yylocation_stack_.push (yyloc); - - /* Shift the error token. */ - YY_SYMBOL_PRINT ("Shifting", yystos_[yyn_], - &yysemantic_stack_[0], &yylocation_stack_[0]); - - yystate_ = yyn_; - goto yynewstate; - - /* Accept. */ -yyacceptlab: - yyresult_ = 0; - goto yyreturn; - - /* Abort. */ -yyabortlab: - yyresult_ = 1; - goto yyreturn; - -yyreturn: - if (yylooka_ != yyeof_ && yylooka_ != yyempty_) - yydestruct_ ("Cleanup: discarding lookahead", yyilooka_, &yylval, &yylloc); - - while (yystate_stack_.height () != 1) - { - yydestruct_ ("Cleanup: popping", - yystos_[yystate_stack_[0]], - &yysemantic_stack_[0], - &yylocation_stack_[0]); - yypop_ (); - } - - return yyresult_; -} - -void -yy::]b4_parser_class_name[::yylex_ () -{ - YYCDEBUG << "Reading a token: "; - yylooka_ = ]b4_c_function_call([yylex], [int], -[[YYSTYPE*], [&yylval]][]dnl -b4_location_if([, [[location*], [&yylloc]]])dnl -m4_ifdef([b4_lex_param], [, ]b4_lex_param))[; -} - -// Generate an error message, and invoke error. -void -yy::]b4_parser_class_name[::yyreport_syntax_error_ () -{ - /* If not already recovering from an error, report this error. */ - if (!yyerrstatus_) - { - ++yynerrs_; - std::string message; -#if YYERROR_VERBOSE - 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; - - // FIXME: This method of building the message is not compatible - // with internationalization. It should work like yacc.c does it. - // That is, first build a string that looks like this: - // "syntax error, unexpected %s or %s or %s" - // Then, invoke YY_ on this string. - // Finally, use the string as a format to output - // yytname_[yyilooka_], etc. - // Until this gets fixed, this message appears in English only. - message = "syntax error, unexpected "; - message += yytnamerr_ (yytname_[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 += yytnamerr_ (yytname_[x]); - } - } - } - else -#endif - message = YY_("syntax 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) b4_parser_class_name::yypact_ninf_ = b4_pact_ninf[; + const ]b4_int_type_for([b4_pact])[ + ]b4_parser_class_name[::yypact_[] = + { + ]b4_pact[ + }; + /* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE + doesn't specify something else to do. Zero means the default is an + error. */ + const ]b4_int_type_for([b4_defact])[ + ]b4_parser_class_name[::yydefact_[] = + { + ]b4_defact[ + }; -/* 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::yypact_ninf_ = b4_pact_ninf[; -const ]b4_int_type_for([b4_pact])[ -yy::]b4_parser_class_name[::yypact_[] = -{ - ]b4_pact[ -}; - -/* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE - 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[::yydefact_[] = -{ - ]b4_defact[ -}; + /* YYPGOTO[NTERM-NUM]. */ + const ]b4_int_type_for([b4_pgoto])[ + ]b4_parser_class_name[::yypgoto_[] = + { + ]b4_pgoto[ + }; -/* YYPGOTO[NTERM-NUM]. */ -const ]b4_int_type_for([b4_pgoto])[ -yy::]b4_parser_class_name[::yypgoto_[] = -{ - ]b4_pgoto[ -}; + /* YYDEFGOTO[NTERM-NUM]. */ + const ]b4_int_type_for([b4_defgoto])[ + ]b4_parser_class_name[::yydefgoto_[] = + { + ]b4_defgoto[ + }; -/* YYDEFGOTO[NTERM-NUM]. */ -const ]b4_int_type_for([b4_defgoto])[ -yy::]b4_parser_class_name[::yydefgoto_[] = -{ - ]b4_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::yytable_ninf_ = b4_table_ninf[; -const ]b4_int_type_for([b4_table])[ -yy::]b4_parser_class_name[::yytable_[] = -{ - ]b4_table[ -}; + /* 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) b4_parser_class_name::yytable_ninf_ = b4_table_ninf[; + const ]b4_int_type_for([b4_table])[ + ]b4_parser_class_name[::yytable_[] = + { + ]b4_table[ + }; -/* YYCHECK. */ -const ]b4_int_type_for([b4_check])[ -yy::]b4_parser_class_name[::yycheck_[] = -{ - ]b4_check[ -}; + /* YYCHECK. */ + const ]b4_int_type_for([b4_check])[ + ]b4_parser_class_name[::yycheck_[] = + { + ]b4_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[::yystos_[] = -{ - ]b4_stos[ -}; + /* STOS_[STATE-NUM] -- The (internal number of the) accessing + symbol of state STATE-NUM. */ + const ]b4_int_type_for([b4_stos])[ + ]b4_parser_class_name[::yystos_[] = + { + ]b4_stos[ + }; #if YYDEBUG -/* TOKEN_NUMBER_[YYLEX-NUM] -- Internal symbol number corresponding - to YYLEX-NUM. */ -const ]b4_int_type_for([b4_toknum])[ -yy::]b4_parser_class_name[::yytoken_number_[] = -{ - ]b4_toknum[ -}; + /* TOKEN_NUMBER_[YYLEX-NUM] -- Internal symbol number corresponding + to YYLEX-NUM. */ + const ]b4_int_type_for([b4_toknum])[ + ]b4_parser_class_name[::yytoken_number_[] = + { + ]b4_toknum[ + }; #endif -/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */ -const ]b4_int_type_for([b4_r1])[ -yy::]b4_parser_class_name[::yyr1_[] = -{ - ]b4_r1[ -}; + /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */ + const ]b4_int_type_for([b4_r1])[ + ]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[::yyr2_[] = -{ - ]b4_r2[ -}; + /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */ + const ]b4_int_type_for([b4_r2])[ + ]b4_parser_class_name[::yyr2_[] = + { + ]b4_r2[ + }; #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE -/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. - First, the terminals, then, starting at \a yyntokens_, nonterminals. */ -const char* -const yy::]b4_parser_class_name[::yytname_[] = -{ - ]b4_tname[ -}; + /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. + First, the terminals, then, starting at \a yyntokens_, nonterminals. */ + const char* + const ]b4_parser_class_name[::yytname_[] = + { + ]b4_tname[ + }; #endif #if YYDEBUG -/* YYRHS -- A `-1'-separated list of the rules' RHS. */ -const yy::]b4_parser_class_name[::rhs_number_type -yy::]b4_parser_class_name[::yyrhs_[] = -{ - ]b4_rhs[ -}; + /* YYRHS -- A `-1'-separated list of the rules' RHS. */ + const ]b4_parser_class_name[::rhs_number_type + ]b4_parser_class_name[::yyrhs_[] = + { + ]b4_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[::yyprhs_[] = -{ - ]b4_prhs[ -}; + /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in + YYRHS. */ + const ]b4_int_type_for([b4_prhs])[ + ]b4_parser_class_name[::yyprhs_[] = + { + ]b4_prhs[ + }; -/* YYRLINE[YYN] -- Source line where rule number YYN was defined. */ -const ]b4_int_type_for([b4_rline])[ -yy::]b4_parser_class_name[::yyrline_[] = -{ - ]b4_rline[ -}; + /* YYRLINE[YYN] -- Source line where rule number YYN was defined. */ + const ]b4_int_type_for([b4_rline])[ + ]b4_parser_class_name[::yyrline_[] = + { + ]b4_rline[ + }; -// Print the state stack on the debug stream. -void -yy::]b4_parser_class_name[::yystack_print_ () -{ - *yycdebug_ << "Stack now"; - for (state_stack_type::const_iterator i = yystate_stack_.begin (); - i != yystate_stack_.end (); ++i) - *yycdebug_ << ' ' << *i; - *yycdebug_ << std::endl; -} + // Print the state stack on the debug stream. + void + ]b4_parser_class_name[::yystack_print_ () + { + *yycdebug_ << "Stack now"; + for (state_stack_type::const_iterator i = yystate_stack_.begin (); + i != yystate_stack_.end (); ++i) + *yycdebug_ << ' ' << *i; + *yycdebug_ << std::endl; + } -// Report on the debug stream that the rule \a yyrule is going to be reduced. -void -yy::]b4_parser_class_name[::yyreduce_print_ (int yyrule) -{ - unsigned int yylno = yyrline_[yyrule]; - /* Print the symbols being reduced, and their result. */ - *yycdebug_ << "Reducing stack by rule " << yyn_ - 1 - << " (line " << yylno << "), "; - for (]b4_int_type_for([b4_prhs])[ i = yyprhs_[yyn_]; - 0 <= yyrhs_[i]; ++i) - *yycdebug_ << yytname_[yyrhs_[i]] << ' '; - *yycdebug_ << "-> " << yytname_[yyr1_[yyn_]] << std::endl; -} + // Report on the debug stream that the rule \a yyrule is going to be reduced. + void + ]b4_parser_class_name[::yyreduce_print_ (int yyrule) + { + unsigned int yylno = yyrline_[yyrule]; + /* Print the symbols being reduced, and their result. */ + *yycdebug_ << "Reducing stack by rule " << yyrule - 1 + << " (line " << yylno << "), "; + for (]b4_int_type_for([b4_prhs])[ i = yyprhs_[yyrule]; + 0 <= yyrhs_[i]; ++i) + *yycdebug_ << yytname_[yyrhs_[i]] << ' '; + *yycdebug_ << "-> " << yytname_[yyr1_[yyrule]] << std::endl; + } #endif // YYDEBUG -/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */ -yy::]b4_parser_class_name[::token_number_type -yy::]b4_parser_class_name[::yytranslate_ (int token) -{ - static - const token_number_type - translate_table[] = + /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */ + ]b4_parser_class_name[::token_number_type + ]b4_parser_class_name[::yytranslate_ (int token) { - ]b4_translate[ - }; - if ((unsigned int) token <= yyuser_token_number_max_) - return translate_table[token]; - else - return yyundef_token_; -} + static + const token_number_type + translate_table[] = + { + ]b4_translate[ + }; + if ((unsigned int) token <= yyuser_token_number_max_) + return translate_table[token]; + else + return yyundef_token_; + } -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 int ]b4_parser_class_name[::yyeof_ = 0; + const int ]b4_parser_class_name[::yylast_ = ]b4_last[; + const int ]b4_parser_class_name[::yynnts_ = ]b4_nterms_number[; + const int ]b4_parser_class_name[::yyempty_ = -2; + const int ]b4_parser_class_name[::yyfinal_ = ]b4_final_state_number[; + const int ]b4_parser_class_name[::yyterror_ = 1; + const int ]b4_parser_class_name[::yyerrcode_ = 256; + const int ]b4_parser_class_name[::yyntokens_ = ]b4_tokens_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[; + const unsigned int ]b4_parser_class_name[::yyuser_token_number_max_ = ]b4_user_token_number_max[; + const ]b4_parser_class_name[::token_number_type ]b4_parser_class_name[::yyundef_token_ = ]b4_undef_token_number[; + +} // namespace yy ]b4_epilogue dnl -@output stack.hh +@output b4_dir_prefix[]stack.hh b4_copyright([stack handling for Bison C++ parsers], [2002, 2003, 2004, 2005])[ #ifndef BISON_STACK_HH @@ -1225,227 +1122,4 @@ namespace yy } #endif // not BISON_STACK_HH] -dnl -@output position.hh -b4_copyright([Position class for Bison C++ parsers], [2002, 2003, 2004, 2005])[ - -/** - ** \file position.hh - ** Define the position class. - */ - -#ifndef BISON_POSITION_HH -# define BISON_POSITION_HH - -# include -# include - -namespace yy -{ - /// Abstract a position. - class position - { - public: - /// Initial column number. - static const unsigned int initial_column = 0; - /// Initial line number. - static const unsigned int initial_line = 1; - - /** \name Ctor & dtor. - ** \{ */ - public: - /// Construct a position. - position () : - filename (0), - line (initial_line), - column (initial_column) - { - } - /** \} */ - - - /** \name Line and Column related manipulators - ** \{ */ - public: - /// (line related) Advance to the COUNT next lines. - inline void lines (int count = 1) - { - column = initial_column; - line += count; - } - - /// (column related) Advance to the COUNT next columns. - inline void columns (int count = 1) - { - int leftmost = initial_column; - int current = column; - if (leftmost <= current + count) - column += count; - else - column = initial_column; - } - /** \} */ - - public: - /// File name to which this position refers. - ]b4_filename_type[* filename; - /// Current line number. - unsigned int line; - /// Current column number. - unsigned int column; - }; - - /// Add and assign a position. - inline const position& - operator+= (position& res, const int width) - { - res.columns (width); - return res; - } - - /// Add two position objects. - inline const position - operator+ (const position& begin, const int width) - { - position res = begin; - return res += width; - } - - /// Add and assign a position. - inline const position& - operator-= (position& res, const int width) - { - return res += -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 - */ - inline std::ostream& - operator<< (std::ostream& ostr, const position& pos) - { - if (pos.filename) - ostr << *pos.filename << ':'; - return ostr << pos.line << '.' << pos.column; - } - -} -#endif // not BISON_POSITION_HH] -@output location.hh -b4_copyright([Location class for Bison C++ parsers], [2002, 2003, 2004, 2005])[ - -/** - ** \file location.hh - ** Define the location class. - */ - -#ifndef BISON_LOCATION_HH -# define BISON_LOCATION_HH - -# include -# include -# include "position.hh" - -namespace yy -{ - - /// Abstract a location. - class location - { - /** \name Ctor & dtor. - ** \{ */ - public: - /// Construct a location. - location () : - begin (), - end () - { - } - /** \} */ - - - /** \name Line and Column related manipulators - ** \{ */ - public: - /// Reset initial location to final location. - inline void step () - { - begin = end; - } - - /// Extend the current location to the COUNT next columns. - inline void columns (unsigned int count = 1) - { - end += count; - } - - /// Extend the current location to the COUNT next lines. - inline void lines (unsigned int count = 1) - { - end.lines (count); - } - /** \} */ - - - public: - /// Beginning of the located region. - position begin; - /// End of the located region. - position end; - }; - - /// Join two location objects to create a location. - inline const location operator+ (const location& begin, const location& end) - { - location res = begin; - res.end = end.end; - return res; - } - - /// Add two location objects. - inline const location operator+ (const location& begin, unsigned int width) - { - location res = begin; - res.columns (width); - return res; - } - - /// Add and assign a location. - inline location& operator+= (location& res, unsigned int width) - { - res.columns (width); - return res; - } - - /** \brief Intercept output stream redirection. - ** \param ostr the destination output stream - ** \param loc a reference to the location to redirect - ** - ** Avoid duplicate information. - */ - inline std::ostream& operator<< (std::ostream& ostr, const location& loc) - { - position last = loc.end - 1; - ostr << loc.begin; - 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; - else if (loc.begin.column != last.column) - ostr << '-' << last.column; - return ostr; - } - -} - -#endif // not BISON_LOCATION_HH] +m4_divert(-1)