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-*- Autoconf -*- # C M4 Macros for Bison. # Copyright (C) 2002, 2004-2015, 2018-2020 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 # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. m4_include(b4_skeletonsdir/[c-like.m4]) # b4_tocpp(STRING) # ---------------- # Convert STRING into a valid C macro name. m4_define([b4_tocpp], [m4_toupper(m4_bpatsubst(m4_quote($1), [[^a-zA-Z0-9]+], [_]))]) # b4_cpp_guard(FILE) # ------------------ # A valid C macro name to use as a CPP header guard for FILE. m4_define([b4_cpp_guard], [[YY_]b4_tocpp(m4_defn([b4_prefix])/[$1])[_INCLUDED]]) # b4_cpp_guard_open(FILE) # b4_cpp_guard_close(FILE) # ------------------------ # If FILE does not expand to nothing, open/close CPP inclusion guards for FILE. m4_define([b4_cpp_guard_open], [m4_ifval(m4_quote($1), [#ifndef b4_cpp_guard([$1]) # define b4_cpp_guard([$1])])]) m4_define([b4_cpp_guard_close], [m4_ifval(m4_quote($1), [#endif b4_comment([!b4_cpp_guard([$1])])])]) ## ---------------- ## ## Identification. ## ## ---------------- ## # b4_identification # ----------------- # Depends on individual skeletons to define b4_pure_flag, b4_push_flag, or # b4_pull_flag if they use the values of the %define variables api.pure or # api.push-pull. m4_define([b4_identification], [[/* Identify Bison output, and Bison version. */ #define YYBISON ]b4_version[ /* Bison version string. */ #define YYBISON_VERSION "]b4_version_string[" /* Skeleton name. */ #define YYSKELETON_NAME ]b4_skeleton[]m4_ifdef([b4_pure_flag], [[ /* Pure parsers. */ #define YYPURE ]b4_pure_flag])[]m4_ifdef([b4_push_flag], [[ /* Push parsers. */ #define YYPUSH ]b4_push_flag])[]m4_ifdef([b4_pull_flag], [[ /* Pull parsers. */ #define YYPULL ]b4_pull_flag])[ ]]) ## ---------------- ## ## Default values. ## ## ---------------- ## # b4_api_prefix, b4_api_PREFIX # ---------------------------- # Corresponds to %define api.prefix b4_percent_define_default([[api.prefix]], [[yy]]) m4_define([b4_api_prefix], [b4_percent_define_get([[api.prefix]])]) m4_define([b4_api_PREFIX], [m4_toupper(b4_api_prefix)]) # b4_prefix # --------- # If the %name-prefix is not given, it is api.prefix. m4_define_default([b4_prefix], [b4_api_prefix]) # If the %union is not named, its name is YYSTYPE. b4_percent_define_default([[api.value.union.name]], [b4_api_PREFIX[][STYPE]]) b4_percent_define_default([[api.symbol.prefix]], [[YYSYMBOL_]]) ## ------------------------ ## ## Pure/impure interfaces. ## ## ------------------------ ## # b4_lex_formals # -------------- # All the yylex formal arguments. # b4_lex_param arrives quoted twice, but we want to keep only one level. m4_define([b4_lex_formals], [b4_pure_if([[[[YYSTYPE *yylvalp]], [[&yylval]]][]dnl b4_locations_if([, [[YYLTYPE *yyllocp], [&yylloc]]])])dnl m4_ifdef([b4_lex_param], [, ]b4_lex_param)]) # b4_lex # ------ # Call yylex. m4_define([b4_lex], [b4_function_call([yylex], [int], b4_lex_formals)]) # b4_user_args # ------------ m4_define([b4_user_args], [m4_ifset([b4_parse_param], [, b4_args(b4_parse_param)])]) # b4_user_formals # --------------- # The possible parse-params formal arguments preceded by a comma. m4_define([b4_user_formals], [m4_ifset([b4_parse_param], [, b4_formals(b4_parse_param)])]) # b4_parse_param # -------------- # If defined, b4_parse_param arrives double quoted, but below we prefer # it to be single quoted. m4_define([b4_parse_param], b4_parse_param) # b4_parse_param_for(DECL, FORMAL, BODY) # --------------------------------------- # Iterate over the user parameters, binding the declaration to DECL, # the formal name to FORMAL, and evaluating the BODY. m4_define([b4_parse_param_for], [m4_foreach([$1_$2], m4_defn([b4_parse_param]), [m4_pushdef([$1], m4_unquote(m4_car($1_$2)))dnl m4_pushdef([$2], m4_shift($1_$2))dnl $3[]dnl m4_popdef([$2])dnl m4_popdef([$1])dnl ])]) # b4_parse_param_use([VAL], [LOC]) # -------------------------------- # 'YYUSE' VAL, LOC if locations are enabled, and all the parse-params. m4_define([b4_parse_param_use], [m4_ifvaln([$1], [ YYUSE ([$1]);])dnl b4_locations_if([m4_ifvaln([$2], [ YYUSE ([$2]);])])dnl b4_parse_param_for([Decl], [Formal], [ YYUSE (Formal); ])dnl ]) ## ------------ ## ## Data Types. ## ## ------------ ## # b4_int_type(MIN, MAX) # --------------------- # Return a narrow int type able to handle integers ranging from MIN # to MAX (included) in portable C code. Assume MIN and MAX fall in # 'int' range. m4_define([b4_int_type], [m4_if(b4_ints_in($@, [-127], [127]), [1], [signed char], b4_ints_in($@, [0], [255]), [1], [unsigned char], b4_ints_in($@, [-32767], [32767]), [1], [short], b4_ints_in($@, [0], [65535]), [1], [unsigned short], [int])]) # b4_c99_int_type(MIN, MAX) # ------------------------- # Like b4_int_type, but for C99. # b4_c99_int_type_define replaces b4_int_type with this. m4_define([b4_c99_int_type], [m4_if(b4_ints_in($@, [-127], [127]), [1], [yytype_int8], b4_ints_in($@, [0], [255]), [1], [yytype_uint8], b4_ints_in($@, [-32767], [32767]), [1], [yytype_int16], b4_ints_in($@, [0], [65535]), [1], [yytype_uint16], [int])]) # b4_c99_int_type_define # ---------------------- # Define private types suitable for holding small integers in C99 or later. m4_define([b4_c99_int_type_define], [m4_copy_force([b4_c99_int_type], [b4_int_type])dnl [#ifdef short # undef short #endif /* On compilers that do not define __PTRDIFF_MAX__ etc., make sure <limits.h> and (if available) <stdint.h> are included so that the code can choose integer types of a good width. */ #ifndef __PTRDIFF_MAX__ # include <limits.h> /* INFRINGES ON USER NAME SPACE */ # if defined __STDC_VERSION__ && 199901 <= __STDC_VERSION__ # include <stdint.h> /* INFRINGES ON USER NAME SPACE */ # define YY_STDINT_H # endif #endif /* Narrow types that promote to a signed type and that can represent a signed or unsigned integer of at least N bits. In tables they can save space and decrease cache pressure. Promoting to a signed type helps avoid bugs in integer arithmetic. */ #ifdef __INT_LEAST8_MAX__ typedef __INT_LEAST8_TYPE__ yytype_int8; #elif defined YY_STDINT_H typedef int_least8_t yytype_int8; #else typedef signed char yytype_int8; #endif #ifdef __INT_LEAST16_MAX__ typedef __INT_LEAST16_TYPE__ yytype_int16; #elif defined YY_STDINT_H typedef int_least16_t yytype_int16; #else typedef short yytype_int16; #endif #if defined __UINT_LEAST8_MAX__ && __UINT_LEAST8_MAX__ <= __INT_MAX__ typedef __UINT_LEAST8_TYPE__ yytype_uint8; #elif (!defined __UINT_LEAST8_MAX__ && defined YY_STDINT_H \ && UINT_LEAST8_MAX <= INT_MAX) typedef uint_least8_t yytype_uint8; #elif !defined __UINT_LEAST8_MAX__ && UCHAR_MAX <= INT_MAX typedef unsigned char yytype_uint8; #else typedef short yytype_uint8; #endif #if defined __UINT_LEAST16_MAX__ && __UINT_LEAST16_MAX__ <= __INT_MAX__ typedef __UINT_LEAST16_TYPE__ yytype_uint16; #elif (!defined __UINT_LEAST16_MAX__ && defined YY_STDINT_H \ && UINT_LEAST16_MAX <= INT_MAX) typedef uint_least16_t yytype_uint16; #elif !defined __UINT_LEAST16_MAX__ && USHRT_MAX <= INT_MAX typedef unsigned short yytype_uint16; #else typedef int yytype_uint16; #endif]]) # b4_sizes_types_define # --------------------- # Define YYPTRDIFF_T/YYPTRDIFF_MAXIMUM, YYSIZE_T/YYSIZE_MAXIMUM, # and YYSIZEOF. m4_define([b4_sizes_types_define], [[#ifndef YYPTRDIFF_T # if defined __PTRDIFF_TYPE__ && defined __PTRDIFF_MAX__ # define YYPTRDIFF_T __PTRDIFF_TYPE__ # define YYPTRDIFF_MAXIMUM __PTRDIFF_MAX__ # elif defined PTRDIFF_MAX # ifndef ptrdiff_t # include <stddef.h> /* INFRINGES ON USER NAME SPACE */ # endif # define YYPTRDIFF_T ptrdiff_t # define YYPTRDIFF_MAXIMUM PTRDIFF_MAX # else # define YYPTRDIFF_T long # define YYPTRDIFF_MAXIMUM LONG_MAX # endif #endif #ifndef YYSIZE_T # ifdef __SIZE_TYPE__ # define YYSIZE_T __SIZE_TYPE__ # elif defined size_t # define YYSIZE_T size_t # elif defined __STDC_VERSION__ && 199901 <= __STDC_VERSION__ # include <stddef.h> /* INFRINGES ON USER NAME SPACE */ # define YYSIZE_T size_t # else # define YYSIZE_T unsigned # endif #endif #define YYSIZE_MAXIMUM \ YY_CAST (YYPTRDIFF_T, \ (YYPTRDIFF_MAXIMUM < YY_CAST (YYSIZE_T, -1) \ ? YYPTRDIFF_MAXIMUM \ : YY_CAST (YYSIZE_T, -1))) #define YYSIZEOF(X) YY_CAST (YYPTRDIFF_T, sizeof (X)) ]]) # b4_int_type_for(NAME) # --------------------- # Return a narrow int type able to handle numbers ranging from # 'NAME_min' to 'NAME_max' (included). m4_define([b4_int_type_for], [b4_int_type($1_min, $1_max)]) # b4_table_value_equals(TABLE, VALUE, LITERAL, SYMBOL) # ---------------------------------------------------- # Without inducing a comparison warning from the compiler, check if the # literal value LITERAL equals VALUE from table TABLE, which must have # TABLE_min and TABLE_max defined. SYMBOL denotes m4_define([b4_table_value_equals], [m4_if(m4_eval($3 < m4_indir([b4_]$1[_min]) || m4_indir([b4_]$1[_max]) < $3), [1], [[0]], [(($2) == $4)])]) ## ----------------- ## ## Compiler issues. ## ## ----------------- ## # b4_attribute_define([noreturn]) # ------------------------------- # Provide portable compiler "attributes". If "noreturn" is passed, define # _Noreturn. m4_define([b4_attribute_define], [[#ifndef YY_ATTRIBUTE_PURE # if defined __GNUC__ && 2 < __GNUC__ + (96 <= __GNUC_MINOR__) # define YY_ATTRIBUTE_PURE __attribute__ ((__pure__)) # else # define YY_ATTRIBUTE_PURE # endif #endif #ifndef YY_ATTRIBUTE_UNUSED # if defined __GNUC__ && 2 < __GNUC__ + (7 <= __GNUC_MINOR__) # define YY_ATTRIBUTE_UNUSED __attribute__ ((__unused__)) # else # define YY_ATTRIBUTE_UNUSED # endif #endif ]m4_bmatch([$1], [\bnoreturn\b], [[/* The _Noreturn keyword of C11. */ ]dnl This is close to lib/_Noreturn.h, except that we do enable dnl the use of [[noreturn]], because _Noreturn is used in places dnl where [[noreturn]] works in C++. We need this in particular dnl because of glr.cc which compiles code from glr.c in C++. dnl And the C++ compiler chokes on _Noreturn. Also, we do not dnl use C' _Noreturn in C++, to avoid -Wc11-extensions warnings. [#ifndef _Noreturn # if (defined __cplusplus \ && ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \ || (defined _MSC_VER && 1900 <= _MSC_VER))) # define _Noreturn [[noreturn]] # elif (!defined __cplusplus \ && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \ || 4 < __GNUC__ + (7 <= __GNUC_MINOR__) \ || (defined __apple_build_version__ \ ? 6000000 <= __apple_build_version__ \ : 3 < __clang_major__ + (5 <= __clang_minor__)))) /* _Noreturn works as-is. */ # elif 2 < __GNUC__ + (8 <= __GNUC_MINOR__) || 0x5110 <= __SUNPRO_C # define _Noreturn __attribute__ ((__noreturn__)) # elif 1200 <= (defined _MSC_VER ? _MSC_VER : 0) # define _Noreturn __declspec (noreturn) # else # define _Noreturn # endif #endif ]])[/* Suppress unused-variable warnings by "using" E. */ #if ! defined lint || defined __GNUC__ # define YYUSE(E) ((void) (E)) #else # define YYUSE(E) /* empty */ #endif #if defined __GNUC__ && ! defined __ICC && 407 <= __GNUC__ * 100 + __GNUC_MINOR__ /* Suppress an incorrect diagnostic about yylval being uninitialized. */ # define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN \ _Pragma ("GCC diagnostic push") \ _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"") \ _Pragma ("GCC diagnostic ignored \"-Wmaybe-uninitialized\"") # define YY_IGNORE_MAYBE_UNINITIALIZED_END \ _Pragma ("GCC diagnostic pop") #else # define YY_INITIAL_VALUE(Value) Value #endif #ifndef YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN # define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN # define YY_IGNORE_MAYBE_UNINITIALIZED_END #endif #ifndef YY_INITIAL_VALUE # define YY_INITIAL_VALUE(Value) /* Nothing. */ #endif #if defined __cplusplus && defined __GNUC__ && ! defined __ICC && 6 <= __GNUC__ # define YY_IGNORE_USELESS_CAST_BEGIN \ _Pragma ("GCC diagnostic push") \ _Pragma ("GCC diagnostic ignored \"-Wuseless-cast\"") # define YY_IGNORE_USELESS_CAST_END \ _Pragma ("GCC diagnostic pop") #endif #ifndef YY_IGNORE_USELESS_CAST_BEGIN # define YY_IGNORE_USELESS_CAST_BEGIN # define YY_IGNORE_USELESS_CAST_END #endif ]]) # b4_cast_define # -------------- m4_define([b4_cast_define], [# ifndef YY_CAST # ifdef __cplusplus # define YY_CAST(Type, Val) static_cast<Type> (Val) # define YY_REINTERPRET_CAST(Type, Val) reinterpret_cast<Type> (Val) # else # define YY_CAST(Type, Val) ((Type) (Val)) # define YY_REINTERPRET_CAST(Type, Val) ((Type) (Val)) # endif # endif[]dnl ]) # b4_null_define # -------------- # Portability issues: define a YY_NULLPTR appropriate for the current # language (C, C++98, or C++11). # # In C++ pre C++11 it is standard practice to use 0 (not NULL) for the # null pointer. In C, prefer ((void*)0) to avoid having to include stdlib.h. m4_define([b4_null_define], [# ifndef YY_NULLPTR # if defined __cplusplus # if 201103L <= __cplusplus # define YY_NULLPTR nullptr # else # define YY_NULLPTR 0 # endif # else # define YY_NULLPTR ((void*)0) # endif # endif[]dnl ]) # b4_null # ------- # Return a null pointer constant. m4_define([b4_null], [YY_NULLPTR]) ## ---------## ## Values. ## ## ---------## # b4_integral_parser_table_define(TABLE-NAME, CONTENT, COMMENT) # ------------------------------------------------------------- # Define "yy<TABLE-NAME>" whose contents is CONTENT. m4_define([b4_integral_parser_table_define], [m4_ifvaln([$3], [b4_comment([$3], [ ])])dnl static const b4_int_type_for([$2]) yy$1[[]] = { $2 };dnl ]) ## ------------- ## ## Token kinds. ## ## ------------- ## # Because C enums are not scoped, because tokens are exposed in the # header, and because these tokens are common to all the parsers, we # need to make sure their names don't collide: use the api.prefix. # YYEOF is special, since the user may give it a different name. m4_define([b4_symbol(-2, id)], [b4_api_PREFIX[][EMPTY]]) m4_define([b4_symbol(-2, tag)], [[No symbol.]]) m4_if(b4_symbol(0, id), [YYEOF], [m4_define([b4_symbol(0, id)], [b4_api_PREFIX[][EOF]])]) m4_define([b4_symbol(1, id)], [b4_api_PREFIX[][error]]) m4_define([b4_symbol(2, id)], [b4_api_PREFIX[][UNDEF]]) # b4_token_define(TOKEN-NUM) # -------------------------- # Output the definition of this token as #define. m4_define([b4_token_define], [b4_token_format([#define %s %s], [$1])]) # b4_token_defines # ---------------- # Output the definition of the tokens. m4_define([b4_token_defines], [[/* Token kinds. */ #define ]b4_symbol([-2], [id])[ -2 ]m4_join([ ], b4_symbol_map([b4_token_define])) ]) # b4_token_enum(TOKEN-NUM) # ------------------------ # Output the definition of this token as an enum. m4_define([b4_token_enum], [b4_token_visible_if([$1], [m4_format([ %-30s %s], m4_format([[%s = %s%s%s]], b4_symbol([$1], [id]), b4_symbol([$1], b4_api_token_raw_if([[number]], [[code]])), m4_if([$1], b4_last_enum_token, [], [[,]])), [b4_symbol_tag_comment([$1])])])]) # b4_token_enums # -------------- # The definition of the token kinds. m4_define([b4_token_enums], [b4_any_token_visible_if([[/* Token kinds. */ #ifndef ]b4_api_PREFIX[TOKENTYPE # define ]b4_api_PREFIX[TOKENTYPE enum ]b4_api_prefix[tokentype { ]b4_symbol([-2], [id])[ = -2, ]b4_symbol_foreach([b4_token_enum])dnl [ }; typedef enum ]b4_api_prefix[tokentype ]b4_api_prefix[token_kind_t; #endif ]])]) # b4_token_enums_defines # ---------------------- # The definition of the tokens (if there are any) as enums and, # if POSIX Yacc is enabled, as #defines. m4_define([b4_token_enums_defines], [b4_token_enums[]b4_yacc_if([b4_token_defines])]) # b4_symbol_translate(STRING) # --------------------------- # Used by "bison" in the array of symbol names to mark those that # require translation. m4_define([b4_symbol_translate], [[N_($1)]]) ## -------------- ## ## Symbol kinds. ## ## -------------- ## # b4_symbol_enum(SYMBOL-NUM) # -------------------------- # Output the definition of this symbol as an enum. m4_define([b4_symbol_enum], [m4_format([ %-40s %s], m4_format([[%s = %s%s%s]], b4_symbol([$1], [kind_base]), [$1], m4_if([$1], b4_last_symbol, [], [[,]])), [b4_symbol_tag_comment([$1])])]) # b4_declare_symbol_enum # ---------------------- # The definition of the symbol internal numbers as an enum. # Defining YYEMPTY here is important: it forces the compiler # to use a signed type, which matters for yytoken. m4_define([b4_declare_symbol_enum], [[/* Symbol kind. */ enum yysymbol_kind_t { ]b4_symbol([-2], kind_base)[ = -2, ]b4_symbol_foreach([b4_symbol_enum])dnl [}; typedef enum yysymbol_kind_t yysymbol_kind_t; ]])]) ## ----------------- ## ## Semantic Values. ## ## ----------------- ## # b4_symbol_value(VAL, [SYMBOL-NUM], [TYPE-TAG]) # ---------------------------------------------- # See README. m4_define([b4_symbol_value], [m4_ifval([$3], [($1.$3)], [m4_ifval([$2], [b4_symbol_if([$2], [has_type], [($1.b4_symbol([$2], [type]))], [$1])], [$1])])]) ## ---------------------- ## ## Defining C functions. ## ## ---------------------- ## # b4_formals([DECL1, NAME1], ...) # ------------------------------- # The formal arguments of a C function definition. m4_define([b4_formals], [m4_if([$#], [0], [void], [$#$1], [1], [void], [m4_map_sep([b4_formal], [, ], [$@])])]) m4_define([b4_formal], [$1]) ## --------------------- ## ## Calling C functions. ## ## --------------------- ## # b4_function_call(NAME, RETURN-VALUE, [DECL1, NAME1], ...) # ----------------------------------------------------------- # Call the function NAME with arguments NAME1, NAME2 etc. m4_define([b4_function_call], [$1 (b4_args(m4_shift2($@)))[]dnl ]) # b4_args([DECL1, NAME1], ...) # ---------------------------- # Output the arguments NAME1, NAME2... m4_define([b4_args], [m4_map_sep([b4_arg], [, ], [$@])]) m4_define([b4_arg], [$2]) ## ----------- ## ## Synclines. ## ## ----------- ## # b4_sync_start(LINE, FILE) # ------------------------- m4_define([b4_sync_start], [[#]line $1 $2]) ## -------------- ## ## User actions. ## ## -------------- ## # b4_case(LABEL, STATEMENTS, [COMMENTS]) # -------------------------------------- m4_define([b4_case], [ case $1:m4_ifval([$3], [ b4_comment([$3])]) $2 b4_syncline([@oline@], [@ofile@])dnl break;]) # b4_predicate_case(LABEL, CONDITIONS) # ------------------------------------ m4_define([b4_predicate_case], [ case $1: if (! ( $2)) YYERROR; b4_syncline([@oline@], [@ofile@])dnl break;]) # b4_yydestruct_define # -------------------- # Define the "yydestruct" function. m4_define_default([b4_yydestruct_define], [[/*-----------------------------------------------. | Release the memory associated to this symbol. | `-----------------------------------------------*/ static void yydestruct (const char *yymsg, yysymbol_kind_t yykind, YYSTYPE *yyvaluep]b4_locations_if(dnl [[, YYLTYPE *yylocationp]])[]b4_user_formals[) { ]b4_parse_param_use([yyvaluep], [yylocationp])dnl [ if (!yymsg) yymsg = "Deleting"; YY_SYMBOL_PRINT (yymsg, yykind, yyvaluep, yylocationp); YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN ]b4_symbol_actions([destructor])[ YY_IGNORE_MAYBE_UNINITIALIZED_END }]dnl ]) # b4_yy_symbol_print_define # ------------------------- # Define the "yy_symbol_print" function. m4_define_default([b4_yy_symbol_print_define], [[ /*-----------------------------------. | Print this symbol's value on YYO. | `-----------------------------------*/ static void yy_symbol_value_print (FILE *yyo, yysymbol_kind_t yykind, YYSTYPE const * const yyvaluep]b4_locations_if(dnl [[, YYLTYPE const * const yylocationp]])[]b4_user_formals[) { FILE *yyoutput = yyo; ]b4_parse_param_use([yyoutput], [yylocationp])dnl [ if (!yyvaluep) return;] dnl glr.c does not feature yytoknum. m4_if(b4_skeleton, ["yacc.c"], [[# ifdef YYPRINT if (yykind < YYNTOKENS) YYPRINT (yyo, yytoknum[yykind], *yyvaluep); # endif ]])dnl b4_percent_code_get([[pre-printer]])dnl YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN b4_symbol_actions([printer]) YY_IGNORE_MAYBE_UNINITIALIZED_END b4_percent_code_get([[post-printer]])dnl [} /*---------------------------. | Print this symbol on YYO. | `---------------------------*/ static void yy_symbol_print (FILE *yyo, yysymbol_kind_t yykind, YYSTYPE const * const yyvaluep]b4_locations_if(dnl [[, YYLTYPE const * const yylocationp]])[]b4_user_formals[) { YYFPRINTF (yyo, "%s %s (", yykind < YYNTOKENS ? "token" : "nterm", yysymbol_name (yykind)); ]b4_locations_if([ YY_LOCATION_PRINT (yyo, *yylocationp); YYFPRINTF (yyo, ": "); ])dnl [ yy_symbol_value_print (yyo, yykind, yyvaluep]dnl b4_locations_if([, yylocationp])[]b4_user_args[); YYFPRINTF (yyo, ")"); }]dnl ]) ## ---------------- ## ## api.value.type. ## ## ---------------- ## # ---------------------- # # api.value.type=union. # # ---------------------- # # b4_symbol_type_register(SYMBOL-NUM) # ----------------------------------- # Symbol SYMBOL-NUM has a type (for variant) instead of a type-tag. # Extend the definition of %union's body (b4_union_members) with a # field of that type, and extend the symbol's "type" field to point to # the field name, instead of the type name. m4_define([b4_symbol_type_register], [m4_define([b4_symbol($1, type_tag)], [b4_symbol_if([$1], [has_id], [b4_symbol([$1], [id])], [yykind_[]b4_symbol([$1], [number])])])dnl m4_append([b4_union_members], m4_expand([m4_format([ %-40s %s], m4_expand([b4_symbol([$1], [type]) b4_symbol([$1], [type_tag]);]), [b4_symbol_tag_comment([$1])])])) ]) # b4_type_define_tag(SYMBOL1-NUM, ...) # ------------------------------------ # For the batch of symbols SYMBOL1-NUM... (which all have the same # type), enhance the %union definition for each of them, and set # there "type" field to the field tag name, instead of the type name. m4_define([b4_type_define_tag], [b4_symbol_if([$1], [has_type], [m4_map([b4_symbol_type_register], [$@])]) ]) # b4_symbol_value_union(VAL, SYMBOL-NUM, [TYPE]) # ---------------------------------------------- # Same of b4_symbol_value, but when api.value.type=union. m4_define([b4_symbol_value_union], [m4_ifval([$3], [(*($3*)(&$1))], [m4_ifval([$2], [b4_symbol_if([$2], [has_type], [($1.b4_symbol([$2], [type_tag]))], [$1])], [$1])])]) # b4_value_type_setup_union # ------------------------- # Setup support for api.value.type=union. Symbols are defined with a # type instead of a union member name: build the corresponding union, # and give the symbols their tag. m4_define([b4_value_type_setup_union], [m4_define([b4_union_members]) b4_type_foreach([b4_type_define_tag]) m4_copy_force([b4_symbol_value_union], [b4_symbol_value]) ]) # -------------------------- # # api.value.type = variant. # # -------------------------- # # b4_value_type_setup_variant # --------------------------- # Setup support for api.value.type=variant. By default, fail, specialized # by other skeletons. m4_define([b4_value_type_setup_variant], [b4_complain_at(b4_percent_define_get_loc([[api.value.type]]), [['%s' does not support '%s']], [b4_skeleton], [%define api.value.type variant])]) # _b4_value_type_setup_keyword # ---------------------------- # api.value.type is defined with a keyword/string syntax. Check if # that is properly defined, and prepare its use. m4_define([_b4_value_type_setup_keyword], [b4_percent_define_check_values([[[[api.value.type]], [[none]], [[union]], [[union-directive]], [[variant]], [[yystype]]]])dnl m4_case(b4_percent_define_get([[api.value.type]]), [union], [b4_value_type_setup_union], [variant], [b4_value_type_setup_variant])]) # b4_value_type_setup # ------------------- # Check if api.value.type is properly defined, and possibly prepare # its use. b4_define_silent([b4_value_type_setup], [# Define default value. b4_percent_define_ifdef([[api.value.type]], [], [# %union => api.value.type=union-directive m4_ifdef([b4_union_members], [m4_define([b4_percent_define_kind(api.value.type)], [keyword]) m4_define([b4_percent_define(api.value.type)], [union-directive])], [# no tag seen => api.value.type={int} m4_if(b4_tag_seen_flag, 0, [m4_define([b4_percent_define_kind(api.value.type)], [code]) m4_define([b4_percent_define(api.value.type)], [int])], [# otherwise api.value.type=yystype m4_define([b4_percent_define_kind(api.value.type)], [keyword]) m4_define([b4_percent_define(api.value.type)], [yystype])])])]) # Set up. m4_bmatch(b4_percent_define_get_kind([[api.value.type]]), [keyword\|string], [_b4_value_type_setup_keyword]) ]) ## -------------- ## ## Declarations. ## ## -------------- ## # b4_value_type_define # -------------------- m4_define([b4_value_type_define], [b4_value_type_setup[]dnl /* Value type. */ m4_bmatch(b4_percent_define_get_kind([[api.value.type]]), [code], [[#if ! defined ]b4_api_PREFIX[STYPE && ! defined ]b4_api_PREFIX[STYPE_IS_DECLARED typedef ]b4_percent_define_get([[api.value.type]])[ ]b4_api_PREFIX[STYPE; # define ]b4_api_PREFIX[STYPE_IS_TRIVIAL 1 # define ]b4_api_PREFIX[STYPE_IS_DECLARED 1 #endif ]], [m4_bmatch(b4_percent_define_get([[api.value.type]]), [union\|union-directive], [[#if ! defined ]b4_api_PREFIX[STYPE && ! defined ]b4_api_PREFIX[STYPE_IS_DECLARED ]b4_percent_define_get_syncline([[api.value.union.name]])dnl [union ]b4_percent_define_get([[api.value.union.name]])[ { ]b4_user_union_members[ }; ]b4_percent_define_get_syncline([[api.value.union.name]])dnl [typedef union ]b4_percent_define_get([[api.value.union.name]])[ ]b4_api_PREFIX[STYPE; # define ]b4_api_PREFIX[STYPE_IS_TRIVIAL 1 # define ]b4_api_PREFIX[STYPE_IS_DECLARED 1 #endif ]])])]) # b4_location_type_define # ----------------------- m4_define([b4_location_type_define], [[/* Location type. */ ]b4_percent_define_ifdef([[api.location.type]], [[typedef ]b4_percent_define_get([[api.location.type]])[ ]b4_api_PREFIX[LTYPE; ]], [[#if ! defined ]b4_api_PREFIX[LTYPE && ! defined ]b4_api_PREFIX[LTYPE_IS_DECLARED typedef struct ]b4_api_PREFIX[LTYPE ]b4_api_PREFIX[LTYPE; struct ]b4_api_PREFIX[LTYPE { int first_line; int first_column; int last_line; int last_column; }; # define ]b4_api_PREFIX[LTYPE_IS_DECLARED 1 # define ]b4_api_PREFIX[LTYPE_IS_TRIVIAL 1 #endif ]])]) # b4_declare_yylstype # ------------------- # Declarations that might either go into the header (if --defines) or # in the parser body. Declare YYSTYPE/YYLTYPE, and yylval/yylloc. m4_define([b4_declare_yylstype], [b4_value_type_define[]b4_locations_if([ b4_location_type_define]) b4_pure_if([], [[extern ]b4_api_PREFIX[STYPE ]b4_prefix[lval; ]b4_locations_if([[extern ]b4_api_PREFIX[LTYPE ]b4_prefix[lloc;]])])[]dnl ]) # b4_YYDEBUG_define # ----------------- m4_define([b4_YYDEBUG_define], [[/* Debug traces. */ ]m4_if(b4_api_prefix, [yy], [[#ifndef YYDEBUG # define YYDEBUG ]b4_parse_trace_if([1], [0])[ #endif]], [[#ifndef ]b4_api_PREFIX[DEBUG # if defined YYDEBUG #if YYDEBUG # define ]b4_api_PREFIX[DEBUG 1 # else # define ]b4_api_PREFIX[DEBUG 0 # endif # else /* ! defined YYDEBUG */ # define ]b4_api_PREFIX[DEBUG ]b4_parse_trace_if([1], [0])[ # endif /* ! defined YYDEBUG */ #endif /* ! defined ]b4_api_PREFIX[DEBUG */]])[]dnl ]) # b4_declare_yydebug # ------------------ m4_define([b4_declare_yydebug], [b4_YYDEBUG_define[ #if ]b4_api_PREFIX[DEBUG extern int ]b4_prefix[debug; #endif][]dnl ]) # b4_yylloc_default_define # ------------------------ # Define YYLLOC_DEFAULT. m4_define([b4_yylloc_default_define], [[/* 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). */ #ifndef YYLLOC_DEFAULT # define YYLLOC_DEFAULT(Current, Rhs, N) \ do \ if (N) \ { \ (Current).first_line = YYRHSLOC (Rhs, 1).first_line; \ (Current).first_column = YYRHSLOC (Rhs, 1).first_column; \ (Current).last_line = YYRHSLOC (Rhs, N).last_line; \ (Current).last_column = YYRHSLOC (Rhs, N).last_column; \ } \ else \ { \ (Current).first_line = (Current).last_line = \ YYRHSLOC (Rhs, 0).last_line; \ (Current).first_column = (Current).last_column = \ YYRHSLOC (Rhs, 0).last_column; \ } \ while (0) #endif ]]) # b4_yy_location_print_define # --------------------------- # Define YY_LOCATION_PRINT. m4_define([b4_yy_location_print_define], [b4_locations_if([[ /* YY_LOCATION_PRINT -- Print the location on the stream. This macro was not mandated originally: define only if we know we won't break user code: when these are the locations we know. */ # ifndef YY_LOCATION_PRINT # if defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL /* Print *YYLOCP on YYO. Private, do not rely on its existence. */ YY_ATTRIBUTE_UNUSED static int yy_location_print_ (FILE *yyo, YYLTYPE const * const yylocp) { int res = 0; int end_col = 0 != yylocp->last_column ? yylocp->last_column - 1 : 0; if (0 <= yylocp->first_line) { res += YYFPRINTF (yyo, "%d", yylocp->first_line); if (0 <= yylocp->first_column) res += YYFPRINTF (yyo, ".%d", yylocp->first_column); } if (0 <= yylocp->last_line) { if (yylocp->first_line < yylocp->last_line) { res += YYFPRINTF (yyo, "-%d", yylocp->last_line); if (0 <= end_col) res += YYFPRINTF (yyo, ".%d", end_col); } else if (0 <= end_col && yylocp->first_column < end_col) res += YYFPRINTF (yyo, "-%d", end_col); } return res; } # define YY_LOCATION_PRINT(File, Loc) \ yy_location_print_ (File, &(Loc)) # else # define YY_LOCATION_PRINT(File, Loc) ((void) 0) # endif # endif /* !defined YY_LOCATION_PRINT */]], [[/* This macro is provided for backward compatibility. */ # ifndef YY_LOCATION_PRINT # define YY_LOCATION_PRINT(File, Loc) ((void) 0) # endif]]) ]) # b4_yyloc_default # ---------------- # Expand to a possible default value for yylloc. m4_define([b4_yyloc_default], [[ # if defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL = { ]m4_join([, ], m4_defn([b4_location_initial_line]), m4_defn([b4_location_initial_column]), m4_defn([b4_location_initial_line]), m4_defn([b4_location_initial_column]))[ } # endif ]])
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