X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/5807bb9156930091850a52b5bb9ab9f89082b04e..acb741cd8c1b768fa3582198c3b6ca8a7b4a466c:/data/lalr1.cc diff --git a/data/lalr1.cc b/data/lalr1.cc index 34eef138..32654f1d 100644 --- a/data/lalr1.cc +++ b/data/lalr1.cc @@ -120,10 +120,9 @@ m4_pushdef([b4_copyright_years], m4_define([b4_parser_class_name], [b4_percent_define_get([[parser_class_name]])]) -b4_locations_if([b4_percent_define_ifdef([[api.location.type]], [], - [# Backward compatibility. +b4_bison_locations_if([# Backward compatibility. 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])]) @@ -139,8 +138,8 @@ m4_define([b4_shared_declarations], # include # include ]b4_defines_if([[ # include "stack.hh" -]b4_locations_if([b4_percent_define_ifdef([[api.location.type]], [], - [[# include "location.hh"]])])])[ +]b4_bison_locations_if([[# include "location.hh"]])])[ +]b4_variant_if([b4_variant_includes])[ ]b4_YYDEBUG_define[ @@ -148,9 +147,8 @@ m4_define([b4_shared_declarations], ]b4_defines_if([], [b4_stack_define -b4_locations_if([b4_percent_define_ifdef([[api.location.type]], [], - [b4_position_define -b4_location_define])])])[ +b4_bison_locations_if([b4_position_define +b4_location_define])])[ ]b4_variant_if([b4_variant_define])[ @@ -304,7 +302,7 @@ b4_location_define])])])[ /// Pop \a n symbols the three stacks. inline void yypop_ (unsigned int n = 1); - /* Constants. */ + // Constants. enum { yyeof_ = 0, @@ -328,18 +326,15 @@ b4_public_types_define])[ [b4_token_defines #ifndef ]b4_api_PREFIX[STYPE - /* Redirection for backward compatibility. */ + // Redirection for backward compatibility. # define ]b4_api_PREFIX[STYPE b4_namespace_ref::b4_parser_class_name::semantic_type #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_output_begin([b4_spec_defines_file]) b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++]) [ /** @@ -347,17 +342,16 @@ b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++]) ** Define the ]b4_namespace_ref[::parser class. */ -/* C++ LALR(1) parser skeleton written by Akim Demaille. */ +// 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]) -m4_divert_pop(0)dnl +b4_output_end() ]) -m4_divert_push(0)dnl -@output(b4_parser_file_name@)@ +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], [], @@ -373,14 +367,14 @@ m4_if(b4_prefix, [yy], [], ]b4_defines_if([[#include "@basename(]b4_spec_defines_file[@)"]], [b4_shared_declarations])[ -/* User implementation prologue. */ +// User implementation prologue. ]b4_user_post_prologue[ ]b4_percent_code_get[ #ifndef YY_ # if defined YYENABLE_NLS && YYENABLE_NLS # if ENABLE_NLS -# include /* FIXME: INFRINGES ON USER NAME SPACE */ +# include // FIXME: INFRINGES ON USER NAME SPACE. # define YY_(msgid) dgettext ("bison-runtime", msgid) # endif # endif @@ -393,13 +387,13 @@ m4_if(b4_prefix, [yy], [], [#define YYRHSLOC(Rhs, K) ((Rhs)[K].location) ]b4_yylloc_default_define])[ -/* Suppress unused-variable warnings by "using" E. */ -#define YYUSE(e) ((void) (e)) +// Suppress unused-variable warnings by "using" E. +#define YYUSE(E) ((void) (E)) -/* Enable debugging if requested. */ +// Enable debugging if requested. #if ]b4_api_PREFIX[DEBUG -/* A pseudo ostream that takes yydebug_ into account. */ +// A pseudo ostream that takes yydebug_ into account. # define YYCDEBUG if (yydebug_) (*yycdebug_) # define YY_SYMBOL_PRINT(Title, Symbol) \ @@ -424,14 +418,14 @@ m4_if(b4_prefix, [yy], [], yystack_print_ (); \ } while (false) -#else /* !]b4_api_PREFIX[DEBUG */ +#else // !]b4_api_PREFIX[DEBUG # define YYCDEBUG if (false) std::cerr # define YY_SYMBOL_PRINT(Title, Symbol) YYUSE(Symbol) # define YY_REDUCE_PRINT(Rule) static_cast(0) # define YY_STACK_PRINT() static_cast(0) -#endif /* !]b4_api_PREFIX[DEBUG */ +#endif // !]b4_api_PREFIX[DEBUG #define yyerrok (yyerrstatus_ = 0) #define yyclearin (yyempty = true) @@ -466,7 +460,7 @@ m4_if(b4_prefix, [yy], [], case '\\': if (*++yyp != '\\') goto do_not_strip_quotes; - /* Fall through. */ + // Fall through. default: yyr += *yyp; break; @@ -691,7 +685,7 @@ m4_if(b4_prefix, [yy], [], ]m4_ifdef([b4_initial_action], [ b4_dollar_pushdef([yyla.value], [], [yyla.location])dnl - /* User initialization code. */ + // User initialization code. b4_user_initial_action b4_dollar_popdef])[]dnl @@ -706,31 +700,32 @@ b4_dollar_popdef])[]dnl yynewstate: YYCDEBUG << "Entering state " << yystack_[0].state << std::endl; - /* Accept? */ + // Accept? if (yystack_[0].state == yyfinal_) goto yyacceptlab; goto yybackup; - /* Backup. */ + // Backup. yybackup: - /* Try to take a decision without lookahead. */ + // Try to take a decision without lookahead. yyn = yypact_[yystack_[0].state]; if (yy_pact_value_is_default_ (yyn)) goto yydefault; - /* Read a lookahead token. */ + // Read a lookahead token. if (yyempty) { YYCDEBUG << "Reading a token: "; try { ]b4_token_ctor_if( -[ yyla = b4_function_call([yylex], [symbol_type], - m4_ifdef([b4_lex_param], b4_lex_param));], -[ yyla.type = yytranslate_ (b4_function_call([yylex], [int], - [b4_api_PREFIX[STYPE*], [&yyla.value]][]dnl +[ symbol_type yylookahead = b4_function_call([yylex], [symbol_type], + m4_ifdef([b4_lex_param], b4_lex_param)); + yyla.move(yylookahead);], +[ 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)));])[ } @@ -749,7 +744,7 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[ if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yyla.type) goto yydefault; - /* Reduce or error. */ + // Reduce or error. yyn = yytable_[yyn]; if (yyn <= 0) { @@ -759,15 +754,14 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[ goto yyreduce; } - /* Discard the token being shifted. */ + // Discard the token being shifted. yyempty = true; - /* Count tokens shifted since error; after three, turn off error - status. */ + // Count tokens shifted since error; after three, turn off error status. if (yyerrstatus_) --yyerrstatus_; - /* Shift the lookahead token. */ + // Shift the lookahead token. yypush_ ("Shifting", yyn, yyla); goto yynewstate; @@ -844,7 +838,7 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[ yylen = 0; YY_STACK_PRINT (); - /* Shift the result of the reduction. */ + // Shift the result of the reduction. yypush_ (YY_NULL, yylhs); goto yynewstate; @@ -852,7 +846,7 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[ | yyerrlab -- here on detecting error. | `--------------------------------------*/ yyerrlab: - /* If not already recovering from an error, report this error. */ + // If not already recovering from an error, report this error. if (!yyerrstatus_) { ++yynerrs_; @@ -868,7 +862,7 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[ /* If just tried and failed to reuse lookahead token after an error, discard it. */ - /* Return failure if at end of input. */ + // Return failure if at end of input. if (yyla.type == yyeof_) YYABORT; else if (!yyempty) @@ -878,8 +872,7 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[ } } - /* Else will try to reuse lookahead token after shifting the error - token. */ + // Else will try to reuse lookahead token after shifting the error token. goto yyerrlab1; @@ -906,7 +899,7 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[ | yyerrlab1 -- common code for both syntax error and YYERROR. | `-------------------------------------------------------------*/ yyerrlab1: - yyerrstatus_ = 3; /* Each real token shifted decrements this. */ + yyerrstatus_ = 3; // Each real token shifted decrements this. { stack_symbol_type error_token; for (;;) @@ -936,18 +929,18 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[ yyerror_range[2].location = yyla.location; YYLLOC_DEFAULT (error_token.location, yyerror_range, 2);]])[ - /* Shift the error token. */ + // Shift the error token. error_token.state = yyn; yypush_ ("Shifting", error_token); } goto yynewstate; - /* Accept. */ + // Accept. yyacceptlab: yyresult = 0; goto yyreturn; - /* Abort. */ + // Abort. yyabortlab: yyresult = 1; goto yyreturn; @@ -1042,7 +1035,7 @@ b4_error_verbose_if([state_type yystate, int yytoken], YYCHECK. In other words, skip the first -YYN actions for this state because they are default actions. */ int yyxbegin = yyn < 0 ? -yyn : 0; - /* Stay within bounds of both yycheck and yytname. */ + // Stay within bounds of both yycheck and yytname. int yychecklim = yylast_ - yyn + 1; int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_; for (int yyx = yyxbegin; yyx < yyxend; ++yyx) @@ -1098,8 +1091,8 @@ b4_error_verbose_if([state_type yystate, int yytoken], ]b4_parser_tables_define[ ]b4_token_table_if([], [[#if ]b4_api_PREFIX[DEBUG]])[ - /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. - First, the terminals, then, starting at \a yyntokens_, nonterminals. */ + // 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_[] = { @@ -1128,10 +1121,10 @@ b4_error_verbose_if([state_type yystate, int yytoken], { unsigned int yylno = yyrline_[yyrule]; int yynrhs = yyr2_[yyrule]; - /* Print the symbols being reduced, and their result. */ + // Print the symbols being reduced, and their result. *yycdebug_ << "Reducing stack by rule " << yyrule - 1 << " (line " << yylno << "):" << std::endl; - /* The symbols being reduced. */ + // The symbols being reduced. for (int yyi = 0; yyi < yynrhs; yyi++) YY_SYMBOL_PRINT (" $" << yyi + 1 << " =", ]b4_rhs_data(yynrhs, yyi + 1)[); @@ -1141,5 +1134,7 @@ b4_error_verbose_if([state_type yystate, int yytoken], ]b4_token_ctor_if([], [b4_yytranslate_define])[ ]b4_namespace_close[ ]b4_epilogue[]dnl -m4_divert_pop(0) +b4_output_end() + + m4_popdef([b4_copyright_years])dnl