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-*- Autoconf -*- # D language support for Bison # Copyright (C) 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/>. # _b4_comment(TEXT, OPEN, CONTINUE, END) # -------------------------------------- # Put TEXT in comment. Avoid trailing spaces: don't indent empty lines. # Avoid adding indentation to the first line, as the indentation comes # from OPEN. That's why we don't patsubst([$1], [^\(.\)], [ \1]). # # Prefix all the output lines with PREFIX. m4_define([_b4_comment], [$2[]m4_bpatsubst(m4_expand([[$1]]), [ \(.\)], [ $3\1])$4]) # b4_comment(TEXT, [PREFIX]) # -------------------------- # Put TEXT in comment. Prefix all the output lines with PREFIX. m4_define([b4_comment], [_b4_comment([$1], [$2/* ], [$2 ], [ */])]) # b4_sync_start(LINE, FILE) # ------------------------- m4_define([b4_sync_start], [[#]line $1 $2]) # b4_list2(LIST1, LIST2) # ---------------------- # Join two lists with a comma if necessary. m4_define([b4_list2], [$1[]m4_ifval(m4_quote($1), [m4_ifval(m4_quote($2), [[, ]])])[]$2]) # b4_percent_define_get3(DEF, PRE, POST, NOT) # ------------------------------------------- # Expand to the value of DEF surrounded by PRE and POST if it's %define'ed, # otherwise NOT. m4_define([b4_percent_define_get3], [m4_ifval(m4_quote(b4_percent_define_get([$1])), [$2[]b4_percent_define_get([$1])[]$3], [$4])]) # b4_flag_value(BOOLEAN-FLAG) # --------------------------- m4_define([b4_flag_value], [b4_flag_if([$1], [true], [false])]) # b4_parser_class_declaration # --------------------------- # The declaration of the parser class ("class YYParser"), with all its # qualifiers/annotations. b4_percent_define_default([[api.parser.abstract]], [[false]]) b4_percent_define_default([[api.parser.final]], [[false]]) b4_percent_define_default([[api.parser.public]], [[false]]) m4_define([b4_parser_class_declaration], [b4_percent_define_get3([api.parser.annotations], [], [ ])dnl b4_percent_define_flag_if([api.parser.public], [public ])dnl b4_percent_define_flag_if([api.parser.abstract], [abstract ])dnl b4_percent_define_flag_if([api.parser.final], [final ])dnl [class ]b4_parser_class[]dnl b4_percent_define_get3([api.parser.extends], [ extends ])dnl b4_percent_define_get3([api.parser.implements], [ implements ])]) # b4_lexer_if(TRUE, FALSE) # ------------------------ m4_define([b4_lexer_if], [b4_percent_code_ifdef([[lexer]], [$1], [$2])]) # b4_position_type_if(TRUE, FALSE) # -------------------------------- m4_define([b4_position_type_if], [b4_percent_define_ifdef([[position_type]], [$1], [$2])]) # b4_location_type_if(TRUE, FALSE) # -------------------------------- m4_define([b4_location_type_if], [b4_percent_define_ifdef([[location_type]], [$1], [$2])]) # b4_identification # ----------------- m4_define([b4_identification], [[/** Version number for the Bison executable that generated this parser. */ public static immutable string yy_bison_version = "]b4_version_string["; /** Name of the skeleton that generated this parser. */ public static immutable string yy_bison_skeleton = ]b4_skeleton[; ]]) ## ------------ ## ## Data types. ## ## ------------ ## # b4_int_type(MIN, MAX) # --------------------- # Return the smallest int type able to handle numbers ranging from # MIN to MAX (included). m4_define([b4_int_type], [m4_if(b4_ints_in($@, [-128], [127]), [1], [byte], b4_ints_in($@, [-32768], [32767]), [1], [short], [int])]) # b4_int_type_for(NAME) # --------------------- # Return the smallest 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_null # ------- m4_define([b4_null], [null]) # b4_integral_parser_table_define(NAME, DATA, COMMENT) #----------------------------------------------------- # Define "yy<TABLE-NAME>" whose contents is CONTENT. m4_define([b4_integral_parser_table_define], [m4_ifvaln([$3], [b4_comment([$3], [ ])])dnl private static immutable b4_int_type_for([$2])[[]] yy$1_ = @{ $2 @};dnl ]) ## ------------- ## ## Token kinds. ## ## ------------- ## m4_define([b4_symbol(-2, id)], [[YYEMPTY]]) # b4_token_enum(TOKEN-NAME, TOKEN-NUMBER) # --------------------------------------- # Output the definition of this token as an enum. m4_define([b4_token_enum], [b4_token_format([ %s = %s, ], [$1])]) # b4_token_enums # -------------- # Output the definition of the tokens as enums. m4_define([b4_token_enums], [/* Token kinds. */ public enum TokenKind { ]b4_symbol_kind([-2])[ = -2, b4_symbol_foreach([b4_token_enum])dnl } ]) ## -------------- ## ## Symbol kinds. ## ## -------------- ## b4_percent_define_default([[api.symbol.prefix]], [[S_]]) # b4_symbol_kind(NUM) # ------------------- m4_define([b4_symbol_kind], [SymbolKind.b4_symbol_kind_base($@)]) # b4_symbol_enum(SYMBOL-NUM) # -------------------------- # Output the definition of this symbol as an enum. m4_define([b4_symbol_enum], [m4_format([ %-30s %s], m4_format([[%s = %s,]], b4_symbol([$1], [kind_base]), [$1]), [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 kinds. */ public enum SymbolKind { ]b4_symbol(-2, kind_base)[ = -2, /* No symbol. */ ]b4_symbol_foreach([b4_symbol_enum])dnl [ }; ]])]) # b4-case(ID, CODE, [COMMENTS]) # ----------------------------- m4_define([b4_case], [ case $1:m4_ifval([$3], [ b4_comment([$3])]) $2 break;]) ## ---------------- ## ## Default values. ## ## ---------------- ## m4_define([b4_yystype], [b4_percent_define_get([[stype]])]) b4_percent_define_default([[stype]], [[YYSemanticType]])]) # %name-prefix m4_define_default([b4_prefix], [[YY]]) b4_percent_define_default([[api.parser.class]], [b4_prefix[]Parser])]) m4_define([b4_parser_class], [b4_percent_define_get([[api.parser.class]])]) #b4_percent_define_default([[location_type]], [Location])]) m4_define([b4_location_type], b4_percent_define_ifdef([[location_type]],[b4_percent_define_get([[location_type]])],[YYLocation])) #b4_percent_define_default([[position_type]], [Position])]) m4_define([b4_position_type], b4_percent_define_ifdef([[position_type]],[b4_percent_define_get([[position_type]])],[YYPosition])) ## ----------------- ## ## Semantic Values. ## ## ----------------- ## # b4_symbol_value(VAL, [SYMBOL-NUM], [TYPE-TAG]) # ---------------------------------------------- # See README. FIXME: factor in c-like? 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])])]) # b4_lhs_value(SYMBOL-NUM, [TYPE]) # -------------------------------- # See README. m4_define([b4_lhs_value], [b4_symbol_value([yyval], [$1], [$2])]) # b4_rhs_value(RULE-LENGTH, POS, SYMBOL-NUM, [TYPE]) # -------------------------------------------------- # See README. # # In this simple implementation, %token and %type have class names # between the angle brackets. m4_define([b4_rhs_value], [b4_symbol_value([(yystack.valueAt (b4_subtract([$1], [$2])))], [$3], [$4])]) # b4_lhs_location() # ----------------- # Expansion of @$. m4_define([b4_lhs_location], [(yyloc)]) # b4_rhs_location(RULE-LENGTH, POS) # --------------------------------- # Expansion of @POS, where the current rule has RULE-LENGTH symbols # on RHS. m4_define([b4_rhs_location], [yystack.locationAt ([$1], [$2])]) # b4_lex_param # b4_parse_param # -------------- # If defined, b4_lex_param arrives double quoted, but below we prefer # it to be single quoted. Same for b4_parse_param. # TODO: should be in bison.m4 m4_define_default([b4_lex_param], [[]])) m4_define([b4_lex_param], b4_lex_param)) m4_define([b4_parse_param], b4_parse_param)) # b4_lex_param_decl # ------------------- # Extra formal arguments of the constructor. m4_define([b4_lex_param_decl], [m4_ifset([b4_lex_param], [b4_remove_comma([$1], b4_param_decls(b4_lex_param))], [$1])]) m4_define([b4_param_decls], [m4_map([b4_param_decl], [$@])]) m4_define([b4_param_decl], [, $1]) m4_define([b4_remove_comma], [m4_ifval(m4_quote($1), [$1, ], [])m4_shift2($@)]) # b4_parse_param_decl # ------------------- # Extra formal arguments of the constructor. m4_define([b4_parse_param_decl], [m4_ifset([b4_parse_param], [b4_remove_comma([$1], b4_param_decls(b4_parse_param))], [$1])]) # b4_lex_param_call # ------------------- # Delegating the lexer parameters to the lexer constructor. m4_define([b4_lex_param_call], [m4_ifset([b4_lex_param], [b4_remove_comma([$1], b4_param_calls(b4_lex_param))], [$1])]) m4_define([b4_param_calls], [m4_map([b4_param_call], [$@])]) m4_define([b4_param_call], [, $2]) # b4_parse_param_cons # ------------------- # Extra initialisations of the constructor. m4_define([b4_parse_param_cons], [m4_ifset([b4_parse_param], [b4_constructor_calls(b4_parse_param)])]) m4_define([b4_constructor_calls], [m4_map([b4_constructor_call], [$@])]) m4_define([b4_constructor_call], [this.$2 = $2; ]) # b4_parse_param_vars # ------------------- # Extra instance variables. m4_define([b4_parse_param_vars], [m4_ifset([b4_parse_param], [ /* User arguments. */ b4_var_decls(b4_parse_param)])]) m4_define([b4_var_decls], [m4_map_sep([b4_var_decl], [ ], [$@])]) m4_define([b4_var_decl], [ protected $1;])
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