X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/6c05543cb03b40b9728f7073c4073ce993d796c6..85bc7f546609ef28269c44945db09bf44f04015b:/data/bison.m4 diff --git a/data/bison.m4 b/data/bison.m4 index 42a548da..9c5d48f5 100644 --- a/data/bison.m4 +++ b/data/bison.m4 @@ -2,7 +2,7 @@ # Language-independent M4 Macros for Bison. -# Copyright (C) 2002, 2004-2012 Free Software Foundation, Inc. +# Copyright (C) 2002, 2004-2013 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 @@ -61,6 +61,30 @@ This special exception was added by the Free Software Foundation in version 2.2 of Bison.])]) +## -------- ## +## Output. ## +## -------- ## + +# b4_output_begin(FILE) +# --------------------- +# Enable output, i.e., send to diversion 0, expand after "#", and +# generate the tag to output into FILE. Must be followed by EOL. +m4_define([b4_output_begin], +[m4_changecom() +m4_divert_push(0)dnl +@output(m4_unquote([$1])@)@dnl +]) + + +# b4_output_end() +# --------------- +# Output nothing, restore # as comment character (no expansions after #). +m4_define([b4_output_end], +[m4_divert_pop(0) +m4_changecom([#]) +]) + + ## ---------------- ## ## Error handling. ## ## ---------------- ## @@ -82,30 +106,16 @@ _m4eof ])dnl m4_if(m4_sysval, [0], [], [m4_fatal([$0: cannot write to stdout])])]) -# b4_error(KIND, FORMAT, [ARG1], [ARG2], ...) -# ------------------------------------------- -# Write @KIND(FORMAT@,ARG1@,ARG2@,...@) to stdout. +# b4_error(KIND, START, END, FORMAT, [ARG1], [ARG2], ...) +# ------------------------------------------------------- +# Write @KIND(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout. # # For example: # -# b4_error([[warn]], [[invalid value for '%s': %s]], [[foo]], [[3]]) +# b4_error([[complain]], [[input.y:2.3]], [[input.y:5.4]], +# [[invalid %s]], [[foo]]) m4_define([b4_error], -[b4_cat([[@]$1[(]$2[]]dnl -[m4_if([$#], [2], [], - [m4_foreach([b4_arg], - m4_dquote(m4_shift(m4_shift($@))), - [[@,]b4_arg])])[@)]])]) - -# b4_error_at(KIND, START, END, FORMAT, [ARG1], [ARG2], ...) -# ---------------------------------------------------------- -# Write @KIND_at(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout. -# -# For example: -# -# b4_error_at([[complain]], [[input.y:2.3]], [[input.y:5.4]], -# [[invalid %s]], [[foo]]) -m4_define([b4_error_at], -[b4_cat([[@]$1[_at(]$2[@,]$3[@,]$4[]]dnl +[b4_cat([[@complain][(]$1[@,]$2[@,]$3[@,]$4[]]dnl [m4_if([$#], [4], [], [m4_foreach([b4_arg], m4_dquote(m4_shift(m4_shift(m4_shift(m4_shift($@))))), @@ -125,21 +135,21 @@ m4_define([b4_error_at], # m4_define([asdf], [ASDF]) # m4_define([fsa], [FSA]) # m4_define([fdsa], [FDSA]) -# b4_warn([[[asdf), asdf]]], [[[fsa), fsa]]], [[[fdsa), fdsa]]]) -# b4_warn([[asdf), asdf]], [[fsa), fsa]], [[fdsa), fdsa]]) -# b4_warn() -# b4_warn(1) -# b4_warn(1, 2) +# b4_warn_at([[[asdf), asdf]]], [[[fsa), fsa]]], [[[fdsa), fdsa]]]) +# b4_warn_at([[asdf), asdf]], [[fsa), fsa]], [[fdsa), fdsa]]) +# b4_warn_at() +# b4_warn_at(1) +# b4_warn_at(1, 2) # # Should produce this without newlines: # -# @warn([asdf), asdf]@,[fsa), fsa]@,[fdsa), fdsa]@) -# @warn(asdf), asdf@,fsa), fsa@,fdsa), fdsa@) +# @warn_at([asdf), asdf]@,@,@,[fsa), fsa]@,[fdsa), fdsa]@) +# @warn(asdf), asdf@,@,@,fsa), fsa@,fdsa), fdsa@) # @warn(@) # @warn(1@) # @warn(1@,2@) m4_define([b4_warn], -[b4_error([[warn]], $@)]) +[b4_error([[warn]], [], [], $@)]) # b4_warn_at(START, END, FORMAT, [ARG1], [ARG2], ...) # --------------------------------------------------- @@ -149,15 +159,15 @@ m4_define([b4_warn], # # b4_warn_at([[input.y:2.3]], [[input.y:5.4]], [[invalid %s]], [[foo]]) m4_define([b4_warn_at], -[b4_error_at([[warn]], $@)]) +[b4_error([[warn]], $@)]) # b4_complain(FORMAT, [ARG1], [ARG2], ...) # ---------------------------------------- -# Write @complain(FORMAT@,ARG1@,ARG2@,...@) to stdout. +# Bounce to b4_complain_at. # # See b4_warn example. m4_define([b4_complain], -[b4_error([[complain]], $@)]) +[b4_error([[complain]], [], [], $@)]) # b4_complain_at(START, END, FORMAT, [ARG1], [ARG2], ...) # ------------------------------------------------------- @@ -165,15 +175,15 @@ m4_define([b4_complain], # # See b4_warn_at example. m4_define([b4_complain_at], -[b4_error_at([[complain]], $@)]) +[b4_error([[complain]], $@)]) # b4_fatal(FORMAT, [ARG1], [ARG2], ...) # ------------------------------------- -# Write @fatal(FORMAT@,ARG1@,ARG2@,...@) to stdout and exit. +# Bounce to b4_fatal_at. # # See b4_warn example. m4_define([b4_fatal], -[b4_error([[fatal]], $@)dnl +[b4_error([[fatal]], [], [], $@)dnl m4_exit(1)]) # b4_fatal_at(START, END, FORMAT, [ARG1], [ARG2], ...) @@ -182,7 +192,7 @@ m4_exit(1)]) # # See b4_warn_at example. m4_define([b4_fatal_at], -[b4_error_at([[fatal]], $@)dnl +[b4_error([[fatal]], $@)dnl m4_exit(1)]) @@ -240,30 +250,30 @@ m4_define([b4_integral_parser_tables_map], STATE-NUM.]]) $1([defact], [b4_defact], - [[YYDEFACT[S] -- default reduction number in state S. Performed when -YYTABLE does not specify something else to do. Zero means the default -is an error.]]) + [[YYDEFACT[STATE-NUM] -- Default reduction number in state STATE-NUM. +Performed when YYTABLE does not specify something else to do. Zero +means the default is an error.]]) $1([pgoto], [b4_pgoto], [[YYPGOTO[NTERM-NUM].]]) $1([defgoto], [b4_defgoto], [[YYDEFGOTO[NTERM-NUM].]]) $1([table], [b4_table], - [[YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If -positive, shift that token. If negative, reduce the rule which + [[YYTABLE[YYPACT[STATE-NUM]] -- What to do in state STATE-NUM. If +positive, shift that token. If negative, reduce the rule whose number is the opposite. If YYTABLE_NINF, syntax error.]]) $1([check], [b4_check]) $1([stos], [b4_stos], - [[STOS_[STATE-NUM] -- The (internal number of the) accessing + [[YYSTOS[STATE-NUM] -- The (internal number of the) accessing symbol of state STATE-NUM.]]) $1([r1], [b4_r1], [[YYR1[YYN] -- Symbol number of symbol that rule YYN derives.]]) $1([r2], [b4_r2], - [[YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.]]) + [[YYR2[YYN] -- Number of symbols on the right hand side of rule YYN.]]) ]) @@ -290,7 +300,7 @@ m4_define([b4_flag_if], [m4_case(b4_$1_flag, [0], [$3], [1], [$2], - [m4_fatal([invalid $1 value: ]$1)])]) + [m4_fatal([invalid $1 value: ]b4_$1_flag)])]) # b4_define_flag_if(FLAG) @@ -303,7 +313,7 @@ m4_define([b4_define_flag_if], # _b4_define_flag_if($1, $2, FLAG) # -------------------------------- # Work around the impossibility to define macros inside macros, -# because issuing `[$1]' is not possible in M4. GNU M4 should provide +# because issuing '[$1]' is not possible in M4. GNU M4 should provide # $$1 a la M5/TeX. m4_define([_b4_define_flag_if], [m4_if([$1$2], $[1]$[2], [], @@ -331,6 +341,33 @@ b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated. # macro per (token, field), where field can has_id, id, etc.: see # src/output.c:prepare_symbols_definitions(). # +# The various FIELDS are: +# +# - has_id: 0 or 1. +# Whether the symbol has an id. +# - id: string +# If has_id, the id. Guaranteed to be usable as a C identifier. +# - tag: string. +# A representat of the symbol. Can be 'foo', 'foo.id', '"foo"' etc. +# - user_number: integer +# The assigned (external) number as used by yylex. +# - is_token: 0 or 1 +# Whether this is a terminal symbol. +# - number: integer +# The internalized number (used after yytranslate). +# - has_type: 0, 1 +# Whether has a semantic value. +# - type +# If it has a semantic value, its type tag, or, if variant are used, +# its type. +# - has_printer: 0, 1 +# - printer: string +# - printer_file: string +# - printer_line: integer +# If the symbol has a printer, everything about it. +# - has_destructor, destructor, destructor_file, destructor_line +# Likewise. +# # The following macros provide access to these values. # b4_symbol_(NUM, FIELD) @@ -344,10 +381,10 @@ m4_define([b4_symbol_], # b4_symbol(NUM, FIELD) # --------------------- # Recover a FIELD about symbol #NUM. Thanks to m4_indir, fails if -# undefined. If FIELD = id, prepend the prefix. +# undefined. If FIELD = id, prepend the token prefix. m4_define([b4_symbol], [m4_case([$2], - [id], [m4_do([b4_percent_define_get([api.tokens.prefix])], + [id], [m4_do([b4_percent_define_get([api.token.prefix])], [b4_symbol_([$1], [id])])], [b4_symbol_($@)])]) @@ -363,6 +400,14 @@ m4_define([b4_symbol_if], [m4_fatal([$0: field $2 of $1 is not a Boolean:] b4_symbol([$1], [$2]))])]) +# b4_symbol_tag_comment(SYMBOL-NUM) +# --------------------------------- +# Issue a comment giving the tag of symbol NUM. +m4_define([b4_symbol_tag_comment], +[b4_comment([b4_symbol([$1], [tag])]) +]) + + # b4_symbol_action_location(SYMBOL-NUM, KIND) # ------------------------------------------- # Report the location of the KIND action as FILE:LINE. @@ -380,9 +425,9 @@ m4_define([b4_symbol_action], b4_symbol_if([$1], [has_type], [m4_dquote(b4_symbol([$1], [type]))]), [(*yylocationp)])dnl - b4_symbol_case_([$1])[]dnl + b4_symbol_case_([$1])[]dnl b4_syncline([b4_symbol([$1], [$2_line])], ["b4_symbol([$1], [$2_file])"]) - b4_symbol([$1], [$2]) + b4_symbol([$1], [$2]) b4_syncline([@oline@], [@ofile@]) break; @@ -401,7 +446,7 @@ m4_define([b4_symbol_printer], [b4_symbol_action([$1], [printer])]) # --------------------------- # Issue a "case NUM" for SYMBOL-NUM. m4_define([b4_symbol_case_], -[ case b4_symbol([$1], [number]): // b4_symbol([$1], [tag]) +[case b4_symbol([$1], [number]): b4_symbol_tag_comment([$1])]) ]) @@ -459,9 +504,12 @@ m4_define([b4_token_format], # --------------------- # Run actions for the symbol NUMS that all have the same type-name. # Skip NUMS that have no type-name. +# +# To specify the action to run, define b4_dollar_dollar(NUMBER, +# TAG, TYPE). m4_define([b4_type_action_], [b4_symbol_if([$1], [has_type], -[m4_map([b4_symbol_case_], [$@])[]dnl +[m4_map([ b4_symbol_case_], [$@])[]dnl b4_dollar_dollar([b4_symbol([$1], [number])], [b4_symbol([$1], [tag])], [b4_symbol([$1], [type])]); @@ -493,11 +541,21 @@ m4_define([b4_basename], # ----------------------- m4_define([b4_syncline], [b4_flag_if([synclines], -[b4_sync_end([__line__], [b4_basename(m4_quote(__file__))]) -b4_sync_start([$1], [$2])])]) +[b4_sync_start([$1], [$2]) b4_sync_end([__line__], + [b4_basename(m4_quote(__file__))])[]dnl +])]) + +# b4_sync_start(LINE, FILE) +# ----------------------- +# Syncline for the new place. Typically a directive for the compiler. +m4_define([b4_sync_start], [b4_comment([$2:$1])]) + +# b4_sync_end(LINE, FILE) +# ----------------------- +# Syncline for the current place, which ends. Typically a comment +# left for the reader. +m4_define([b4_sync_end], [b4_comment([$2:$1])]) -m4_define([b4_sync_end], [b4_comment([Line $1 of $2])]) -m4_define([b4_sync_start], [b4_comment([Line $1 of $2])]) # b4_user_code(USER-CODE) # ----------------------- @@ -519,14 +577,14 @@ m4_define([b4_define_user_code], # b4_user_initial_action # b4_user_post_prologue # b4_user_pre_prologue -# b4_user_stype +# b4_user_union_members # ---------------------- # Macros that issue user code, ending with synclines. b4_define_user_code([actions]) b4_define_user_code([initial_action]) b4_define_user_code([post_prologue]) b4_define_user_code([pre_prologue]) -b4_define_user_code([stype]) +b4_define_user_code([union_members]) # b4_check_user_names(WHAT, USER-LIST, BISON-NAMESPACE) @@ -711,17 +769,18 @@ m4_define([b4_percent_define_default], m4_define([b4_percent_define_syncline(]$1[)], [[]])])]) -# b4_percent_define_if_define(VARIABLE) -# ------------------------------------- -# Define b4_VARIABLE_if that executes its $1 or $2 depending whether -# VARIABLE was %defined. The characters `.' and `-' in VARIABLE are mapped -# to `_'. +# b4_percent_define_if_define(NAME, [VARIABLE = NAME]) +# ---------------------------------------------------- +# Define b4_NAME_if that executes its $1 or $2 depending whether +# VARIABLE was %defined. The characters '.' and `-' in VARIABLE are mapped +# to '_'. m4_define([b4_percent_define_if_define_], [m4_define(m4_bpatsubst([b4_$1_if], [[-.]], [_]), - [b4_percent_define_flag_if([$1], [$2], [$3])])]) + [b4_percent_define_flag_if(m4_default([$2], [$1]), + [$3], [$4])])]) m4_define([b4_percent_define_if_define], -[b4_percent_define_default([[$1]], [[false]]) -b4_percent_define_if_define_([$1], $[1], $[2])]) +[b4_percent_define_default([m4_default([$2], [$1])], [[false]]) +b4_percent_define_if_define_([$1], [$2], $[1], $[2])]) # b4_percent_define_check_values(VALUES) @@ -757,7 +816,7 @@ m4_define([_b4_percent_define_check_values], [$1], m4_dquote(m4_indir([b4_percent_define(]$1[)]))) m4_foreach([b4_value], m4_dquote(m4_shift($@)), - [b4_complain_at(b4_percent_define_get_loc([$1]), + [b4_error([[note]], b4_percent_define_get_loc([$1]), [] [[accepted value: '%s']], m4_dquote(b4_value))])])dnl m4_popdef([b4_good_value])], @@ -804,19 +863,25 @@ m4_define([b4_percent_code_ifdef], # Default values for %define. # --------------------------- -# If the api.tokens.prefix, it is empty. -m4_percent_define_default([[api.tokens.prefix]], [[]]) +# If the api.token.prefix, it is empty. +m4_percent_define_default([[api.token.prefix]], [[]]) # b4_parse_assert_if([IF-ASSERTIONS-ARE-USED], [IF-NOT]) # b4_parse_trace_if([IF-DEBUG-TRACES-ARE-ENABLED], [IF-NOT]) -# b4_lex_symbol_if([IF-YYLEX-RETURNS-A-COMPLETE-SYMBOL], [IF-NOT]) -# b4_variant_if([IF-VARIANT-ARE-USED], [IF-NOT]) +# b4_token_ctor_if([IF-YYLEX-RETURNS-A-TOKEN], [IF-NOT]) # ---------------------------------------------- -b4_percent_define_if_define([lex_symbol]) +b4_percent_define_if_define([token_ctor], [api.token.constructor]) b4_percent_define_if_define([locations]) # Whether locations are tracked. b4_percent_define_if_define([parse.assert]) b4_percent_define_if_define([parse.trace]) -b4_percent_define_if_define([variant]) + + +# b4_bison_locations_if([IF-TRUE]) +# -------------------------------- +# Expand IF-TRUE if using locations, and using the default location +# type. +m4_define([b4_bison_locations_if], +[b4_locations_if([b4_percent_define_ifdef([[api.location.type]], [], [$1])])]) # b4_error_verbose_if([IF-ERRORS-ARE-VERBOSE], [IF-NOT]) @@ -836,6 +901,15 @@ b4_define_flag_if([error_verbose]) b4_error_verbose_if([m4_define([b4_token_table_flag], [1])]) +# b4_variant_if([IF-VARIANT-ARE-USED], [IF-NOT]) +# ---------------------------------------------- +b4_percent_define_if_define([variant]) +m4_case(b4_percent_define_get([[api.value.type]]), + [variant], [m4_define([b4_variant_flag], [[1]])], + [m4_define([b4_variant_flag], [[0]])]) +b4_define_flag_if([variant]) + + ## ----------------------------------------------------------- ## ## After processing the skeletons, check that all the user's ## ## %define variables and %code qualifiers were used by Bison. ##