java.m4
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-*- Autoconf -*- # Java language support for Bison # Copyright (C) 2007-2015 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_pkgdatadir/[c-like.m4]) # 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_public_if(TRUE, FALSE) # ------------------------- b4_percent_define_default([[public]], [[false]]) m4_define([b4_public_if], [b4_percent_define_flag_if([public], [$1], [$2])]) # b4_abstract_if(TRUE, FALSE) # --------------------------- b4_percent_define_default([[abstract]], [[false]]) m4_define([b4_abstract_if], [b4_percent_define_flag_if([abstract], [$1], [$2])]) # b4_final_if(TRUE, FALSE) # --------------------------- b4_percent_define_default([[final]], [[false]]) m4_define([b4_final_if], [b4_percent_define_flag_if([final], [$1], [$2])]) # b4_strictfp_if(TRUE, FALSE) # --------------------------- b4_percent_define_default([[strictfp]], [[false]]) m4_define([b4_strictfp_if], [b4_percent_define_flag_if([strictfp], [$1], [$2])]) # b4_lexer_if(TRUE, FALSE) # ------------------------ m4_define([b4_lexer_if], [b4_percent_code_ifdef([[lexer]], [$1], [$2])]) # b4_identification # ----------------- m4_define([b4_identification], [ /** Version number for the Bison executable that generated this parser. */ public static final String bisonVersion = "b4_version"; /** Name of the skeleton that generated this parser. */ public static final String bisonSkeleton = b4_skeleton; ]) ## ------------ ## ## Data types. ## ## ------------ ## # b4_int_type(MIN, MAX) # --------------------- # Return the smallest int type able to handle numbers ranging from # MIN to MAX (included). m4_define([b4_int_type], [m4_if(b4_ints_in($@, [-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_typed_parser_table_define(TYPE, NAME, DATA, COMMENT) # ------------------------------------------------------- m4_define([b4_typed_parser_table_define], [m4_ifval([$4], [b4_comment([$4]) ])dnl [private static final ]$1[ yy$2_[] = yy$2_init(); private static final ]$1[[] yy$2_init() { return new ]$1[[] { ]$3[ }; }]]) # b4_integral_parser_table_define(NAME, DATA, COMMENT) #----------------------------------------------------- m4_define([b4_integral_parser_table_define], [b4_typed_parser_table_define([b4_int_type_for([$2])], [$1], [$2], [$3])]) ## ------------------------- ## ## Assigning token numbers. ## ## ------------------------- ## # b4_token_enum(TOKEN-NUM) # ------------------------ # Output the definition of this token as an enum. m4_define([b4_token_enum], [b4_token_format([ /** Token number, to be returned by the scanner. */ static final int %s = %s; ], [$1])]) # b4_token_enums # -------------- # Output the definition of the tokens (if there are) as enums. m4_define([b4_token_enums], [b4_any_token_visible_if([/* Tokens. */ b4_symbol_foreach([b4_token_enum])])]) # b4-case(ID, CODE) # ----------------- # We need to fool Java's stupid unreachable code detection. m4_define([b4_case], [ case $1: if (yyn == $1) $2; break; ]) # b4_predicate_case(LABEL, CONDITIONS) # ------------------------------------ m4_define([b4_predicate_case], [ case $1: if (! ($2)) YYERROR; break; ]) ## -------- ## ## Checks. ## ## -------- ## b4_percent_define_check_kind([[api.value.type]], [code], [deprecated]) b4_percent_define_check_kind([[annotations]], [code], [deprecated]) b4_percent_define_check_kind([[extends]], [code], [deprecated]) b4_percent_define_check_kind([[implements]], [code], [deprecated]) b4_percent_define_check_kind([[init_throws]], [code], [deprecated]) b4_percent_define_check_kind([[lex_throws]], [code], [deprecated]) b4_percent_define_check_kind([[parser_class_name]], [code], [deprecated]) b4_percent_define_check_kind([[throws]], [code], [deprecated]) ## ---------------- ## ## Default values. ## ## ---------------- ## m4_define([b4_yystype], [b4_percent_define_get([[api.value.type]])]) b4_percent_define_default([[api.value.type]], [[Object]]) # %name-prefix m4_define_default([b4_prefix], [[YY]]) b4_percent_define_default([[parser_class_name]], [b4_prefix[]Parser]) m4_define([b4_parser_class_name], [b4_percent_define_get([[parser_class_name]])]) b4_percent_define_default([[lex_throws]], [[java.io.IOException]]) m4_define([b4_lex_throws], [b4_percent_define_get([[lex_throws]])]) b4_percent_define_default([[throws]], []) m4_define([b4_throws], [b4_percent_define_get([[throws]])]) b4_percent_define_default([[init_throws]], []) m4_define([b4_init_throws], [b4_percent_define_get([[init_throws]])]) b4_percent_define_default([[api.location.type]], [Location]) m4_define([b4_location_type], [b4_percent_define_get([[api.location.type]])]) b4_percent_define_default([[api.position.type]], [Position]) m4_define([b4_position_type], [b4_percent_define_get([[api.position.type]])]) ## ----------------- ## ## Semantic Values. ## ## ----------------- ## # b4_lhs_value([TYPE]) # -------------------- # Expansion of $<TYPE>$. m4_define([b4_lhs_value], [yyval]) # b4_rhs_value(RULE-LENGTH, NUM, [TYPE]) # -------------------------------------- # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH # symbols on RHS. # # In this simple implementation, %token and %type have class names # between the angle brackets. m4_define([b4_rhs_value], [(m4_ifval($3, [($3)])[](yystack.valueAt ($1-($2))))]) # b4_lhs_location() # ----------------- # Expansion of @$. 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], [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 final $1;]) # b4_maybe_throws(THROWS) # ----------------------- # Expand to either an empty string or "throws THROWS". m4_define([b4_maybe_throws], [m4_ifval($1, [throws $1])])
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