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333 lines
9.6 KiB
333 lines
9.6 KiB
-*- Autoconf -*-
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# D language support for Bison
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# Copyright (C) 2018-2019 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# _b4_comment(TEXT, OPEN, CONTINUE, END)
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# --------------------------------------
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# Put TEXT in comment. Avoid trailing spaces: don't indent empty lines.
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# Avoid adding indentation to the first line, as the indentation comes
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# from OPEN. That's why we don't patsubst([$1], [^\(.\)], [ \1]).
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#
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# Prefix all the output lines with PREFIX.
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m4_define([_b4_comment],
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[$2[]m4_bpatsubst(m4_expand([[$1]]), [
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\(.\)], [
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$3\1])$4])
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# b4_comment(TEXT, [PREFIX])
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# --------------------------
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# Put TEXT in comment. Prefix all the output lines with PREFIX.
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m4_define([b4_comment],
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[_b4_comment([$1], [$2/* ], [$2 ], [ */])])
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# b4_sync_start(LINE, FILE)
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# -------------------------
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m4_define([b4_sync_start], [[#]line $1 $2])
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# b4_list2(LIST1, LIST2)
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# ----------------------
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# Join two lists with a comma if necessary.
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m4_define([b4_list2],
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[$1[]m4_ifval(m4_quote($1), [m4_ifval(m4_quote($2), [[, ]])])[]$2])
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# b4_percent_define_get3(DEF, PRE, POST, NOT)
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# -------------------------------------------
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# Expand to the value of DEF surrounded by PRE and POST if it's %define'ed,
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# otherwise NOT.
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m4_define([b4_percent_define_get3],
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[m4_ifval(m4_quote(b4_percent_define_get([$1])),
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[$2[]b4_percent_define_get([$1])[]$3], [$4])])
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# b4_flag_value(BOOLEAN-FLAG)
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# ---------------------------
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m4_define([b4_flag_value], [b4_flag_if([$1], [true], [false])])
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# b4_parser_class_declaration
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# ---------------------------
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# The declaration of the parser class ("class YYParser"), with all its
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# qualifiers/annotations.
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b4_percent_define_default([[api.parser.abstract]], [[false]])
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b4_percent_define_default([[api.parser.final]], [[false]])
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b4_percent_define_default([[api.parser.public]], [[false]])
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m4_define([b4_parser_class_declaration],
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[b4_percent_define_get3([api.parser.annotations], [], [ ])dnl
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b4_percent_define_flag_if([api.parser.public], [public ])dnl
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b4_percent_define_flag_if([api.parser.abstract], [abstract ])dnl
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b4_percent_define_flag_if([api.parser.final], [final ])dnl
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[class ]b4_parser_class[]dnl
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b4_percent_define_get3([api.parser.extends], [ extends ])dnl
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b4_percent_define_get3([api.parser.implements], [ implements ])])
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# b4_lexer_if(TRUE, FALSE)
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# ------------------------
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m4_define([b4_lexer_if],
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[b4_percent_code_ifdef([[lexer]], [$1], [$2])])
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# b4_position_type_if(TRUE, FALSE)
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# --------------------------------
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m4_define([b4_position_type_if],
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[b4_percent_define_ifdef([[position_type]], [$1], [$2])])
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# b4_location_type_if(TRUE, FALSE)
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# --------------------------------
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m4_define([b4_location_type_if],
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[b4_percent_define_ifdef([[location_type]], [$1], [$2])])
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# b4_identification
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# -----------------
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m4_define([b4_identification],
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[/** Version number for the Bison executable that generated this parser. */
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public static immutable string yy_bison_version = "b4_version";
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/** Name of the skeleton that generated this parser. */
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public static immutable string yy_bison_skeleton = b4_skeleton;
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])
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## ------------ ##
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## Data types. ##
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## ------------ ##
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# b4_int_type(MIN, MAX)
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# ---------------------
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# Return the smallest int type able to handle numbers ranging from
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# MIN to MAX (included).
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m4_define([b4_int_type],
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[m4_if(b4_ints_in($@, [-128], [127]), [1], [byte],
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b4_ints_in($@, [-32768], [32767]), [1], [short],
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[int])])
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# b4_int_type_for(NAME)
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# ---------------------
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# Return the smallest int type able to handle numbers ranging from
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# `NAME_min' to `NAME_max' (included).
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m4_define([b4_int_type_for],
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[b4_int_type($1_min, $1_max)])
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# b4_null
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# -------
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m4_define([b4_null], [null])
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# b4_integral_parser_table_define(NAME, DATA, COMMENT)
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#-----------------------------------------------------
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# Define "yy<TABLE-NAME>" whose contents is CONTENT.
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m4_define([b4_integral_parser_table_define],
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[m4_ifvaln([$3], [b4_comment([$3], [ ])])dnl
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private static immutable b4_int_type_for([$2])[[]] yy$1_ =
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@{
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$2
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@};dnl
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])
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## ------------------------- ##
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## Assigning token numbers. ##
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## ------------------------- ##
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# b4_token_enum(TOKEN-NAME, TOKEN-NUMBER)
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# ---------------------------------------
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# Output the definition of this token as an enum.
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m4_define([b4_token_enum],
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[b4_token_format([ %s = %s,
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], [$1])])
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# b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
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# -----------------------------------------------------
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# Output the definition of the tokens as enums.
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m4_define([b4_token_enums],
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[/* Tokens. */
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public enum YYTokenType {
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/** Token returned by the scanner to signal the end of its input. */
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EOF = 0,
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b4_symbol_foreach([b4_token_enum])
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}
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])
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# b4-case(ID, CODE)
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# -----------------
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m4_define([b4_case], [ case $1:
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$2
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break;])
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## ---------------- ##
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## Default values. ##
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## ---------------- ##
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m4_define([b4_yystype], [b4_percent_define_get([[stype]])])
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b4_percent_define_default([[stype]], [[YYSemanticType]])])
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# %name-prefix
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m4_define_default([b4_prefix], [[YY]])
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b4_percent_define_default([[api.parser.class]], [b4_prefix[]Parser])])
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m4_define([b4_parser_class], [b4_percent_define_get([[api.parser.class]])])
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#b4_percent_define_default([[location_type]], [Location])])
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m4_define([b4_location_type], b4_percent_define_ifdef([[location_type]],[b4_percent_define_get([[location_type]])],[YYLocation]))
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#b4_percent_define_default([[position_type]], [Position])])
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m4_define([b4_position_type], b4_percent_define_ifdef([[position_type]],[b4_percent_define_get([[position_type]])],[YYPosition]))
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## ----------------- ##
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## Semantic Values. ##
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## ----------------- ##
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# b4_symbol_value(VAL, [SYMBOL-NUM], [TYPE-TAG])
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# ----------------------------------------------
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# See README. FIXME: factor in c-like?
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m4_define([b4_symbol_value],
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[m4_ifval([$3],
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[($1.$3)],
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[m4_ifval([$2],
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[b4_symbol_if([$2], [has_type],
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[($1.b4_symbol([$2], [type]))],
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[$1])],
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[$1])])])
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# b4_lhs_value(SYMBOL-NUM, [TYPE])
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# --------------------------------
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# See README.
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m4_define([b4_lhs_value],
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[b4_symbol_value([yyval], [$1], [$2])])
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# b4_rhs_value(RULE-LENGTH, POS, SYMBOL-NUM, [TYPE])
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# --------------------------------------------------
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# See README.
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#
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# In this simple implementation, %token and %type have class names
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# between the angle brackets.
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m4_define([b4_rhs_value],
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[b4_symbol_value([(yystack.valueAt (b4_subtract([$1], [$2])))], [$3], [$4])])
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# b4_lhs_location()
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# -----------------
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# Expansion of @$.
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m4_define([b4_lhs_location],
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[(yyloc)])
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# b4_rhs_location(RULE-LENGTH, POS)
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# ---------------------------------
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# Expansion of @POS, where the current rule has RULE-LENGTH symbols
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# on RHS.
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m4_define([b4_rhs_location],
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[yystack.locationAt ([$1], [$2])])
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# b4_lex_param
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# b4_parse_param
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# --------------
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# If defined, b4_lex_param arrives double quoted, but below we prefer
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# it to be single quoted. Same for b4_parse_param.
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# TODO: should be in bison.m4
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m4_define_default([b4_lex_param], [[]]))
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m4_define([b4_lex_param], b4_lex_param))
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m4_define([b4_parse_param], b4_parse_param))
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# b4_lex_param_decl
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# -------------------
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# Extra formal arguments of the constructor.
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m4_define([b4_lex_param_decl],
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[m4_ifset([b4_lex_param],
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[b4_remove_comma([$1],
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b4_param_decls(b4_lex_param))],
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[$1])])
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m4_define([b4_param_decls],
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[m4_map([b4_param_decl], [$@])])
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m4_define([b4_param_decl], [, $1])
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m4_define([b4_remove_comma], [m4_ifval(m4_quote($1), [$1, ], [])m4_shift2($@)])
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# b4_parse_param_decl
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# -------------------
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# Extra formal arguments of the constructor.
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m4_define([b4_parse_param_decl],
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[m4_ifset([b4_parse_param],
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[b4_remove_comma([$1],
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b4_param_decls(b4_parse_param))],
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[$1])])
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# b4_lex_param_call
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# -------------------
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# Delegating the lexer parameters to the lexer constructor.
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m4_define([b4_lex_param_call],
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[m4_ifset([b4_lex_param],
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[b4_remove_comma([$1],
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b4_param_calls(b4_lex_param))],
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[$1])])
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m4_define([b4_param_calls],
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[m4_map([b4_param_call], [$@])])
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m4_define([b4_param_call], [, $2])
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# b4_parse_param_cons
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# -------------------
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# Extra initialisations of the constructor.
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m4_define([b4_parse_param_cons],
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[m4_ifset([b4_parse_param],
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[b4_constructor_calls(b4_parse_param)])])
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m4_define([b4_constructor_calls],
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[m4_map([b4_constructor_call], [$@])])
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m4_define([b4_constructor_call],
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[this.$2 = $2;
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])
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# b4_parse_param_vars
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# -------------------
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# Extra instance variables.
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m4_define([b4_parse_param_vars],
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[m4_ifset([b4_parse_param],
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[
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/* User arguments. */
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b4_var_decls(b4_parse_param)])])
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m4_define([b4_var_decls],
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[m4_map_sep([b4_var_decl], [
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], [$@])])
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m4_define([b4_var_decl],
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[ protected $1;])
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