X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/416a9da61efaad96d1a2e38be1f6ac3f3c544561..ae7cd18c98d9bad7e95d4f4070d2d09e8db675f8:/data/bison.m4 diff --git a/data/bison.m4 b/data/bison.m4 index f7c84633..ca27159c 100644 --- a/data/bison.m4 +++ b/data/bison.m4 @@ -1,8 +1,8 @@ -*- Autoconf -*- # Language-independent M4 Macros for Bison. -# Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009 -# 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 +61,44 @@ 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([#]) +]) + + +# b4_divert_kill(CODE) +# -------------------- +# Expand CODE for its side effects, discard its output. +m4_define([b4_divert_kill], +[m4_divert_text([KILL], [$1])]) + + +# b4_define_silent(MACRO, CODE) +# ----------------------------- +# Same as m4_define, but throw away the expansion of CODE. +m4_define([b4_define_silent], +[m4_define([$1], [b4_divert_kill([$2])])]) + + ## ---------------- ## ## Error handling. ## ## ---------------- ## @@ -82,30 +120,16 @@ _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($@))))), @@ -117,7 +141,7 @@ m4_define([b4_error_at], # # For example: # -# b4_warn([[invalid value for `%s': %s]], [[foo]], [[3]]) +# b4_warn([[invalid value for '%s': %s]], [[foo]], [[3]]) # # As a simple test suite, this: # @@ -125,21 +149,21 @@ 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 +173,15 @@ 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 +189,15 @@ 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], ...) @@ -182,25 +206,10 @@ 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)]) -## ---------------- ## -## Default values. ## -## ---------------- ## - -# m4_define_default([b4_lex_param], []) dnl breaks other skeletons -m4_define_default([b4_pre_prologue], []) -m4_define_default([b4_post_prologue], []) -m4_define_default([b4_epilogue], []) -m4_define_default([b4_parse_param], []) - -# The initial column and line. -m4_define_default([b4_location_initial_column], [1]) -m4_define_default([b4_location_initial_line], [1]) - - ## ------------ ## ## Data Types. ## ## ------------ ## @@ -221,23 +230,23 @@ m4_define([b4_subtract], [m4_eval([$1 - $2])], [($1) - ($2)])]) -# b4_args(ARG1, ...) -# _b4_args(ARG1, ...) +# b4_join(ARG1, ...) +# _b4_join(ARG1, ...) # ------------------- # Join with comma, skipping empty arguments. -# b4_args calls itself recursively until it sees the first non-empty -# argument, then calls _b4_args which prepends each non-empty argument +# b4_join calls itself recursively until it sees the first non-empty +# argument, then calls _b4_join which prepends each non-empty argument # with a comma. -m4_define([b4_args], +m4_define([b4_join], [m4_if([$#$1], [1], [], [m4_ifval([$1], [$1[]_$0(m4_shift($@))], [$0(m4_shift($@))])])]) -# _b4_args(ARGS1, ...) +# _b4_join(ARGS1, ...) # -------------------- -m4_define([_b4_args], +m4_define([_b4_join], [m4_if([$#$1], [1], [], [m4_ifval([$1], [, $1])[]$0(m4_shift($@))])]) @@ -255,30 +264,30 @@ 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.]]) ]) @@ -304,8 +313,8 @@ m4_define([b4_parser_tables_define], m4_define([b4_flag_if], [m4_case(b4_$1_flag, [0], [$3], - [1], [$2], - [m4_fatal([invalid $1 value: ]$1)])]) + [1], [$2], + [m4_fatal([invalid $1 value: ]b4_$1_flag)])]) # b4_define_flag_if(FLAG) @@ -317,9 +326,9 @@ m4_define([b4_define_flag_if], # _b4_define_flag_if($1, $2, FLAG) # -------------------------------- -# This macro works around the impossibility to define macros -# inside macros, because issuing `[$1]' is not possible in M4 :(. -# This sucks hard, GNU M4 should really provide M5 like $$1. +# Work around the impossibility to define macros inside macros, +# because issuing '[$1]' is not possible in M4. GNU M4 should provide +# $$1 a la M5/TeX. m4_define([_b4_define_flag_if], [m4_if([$1$2], $[1]$[2], [], [m4_fatal([$0: Invalid arguments: $@])])dnl @@ -330,16 +339,56 @@ m4_define([b4_$3_if], # b4_FLAG_if(IF-TRUE, IF-FALSE) # ----------------------------- # Expand IF-TRUE, if FLAG is true, IF-FALSE otherwise. -b4_define_flag_if([defines]) # Whether headers are requested. -b4_define_flag_if([glr]) # Whether a GLR parser is requested. -b4_define_flag_if([nondeterministic]) # Whether conflicts should be handled. -b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated. +b4_define_flag_if([defines]) # Whether headers are requested. +b4_define_flag_if([glr]) # Whether a GLR parser is requested. +b4_define_flag_if([nondeterministic]) # Whether conflicts should be handled. +b4_define_flag_if([token_table]) # Whether yytoken_table is demanded. +b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated. ## --------- ## ## Symbols. ## ## --------- ## +# In order to unify the handling of the various aspects of symbols +# (tag, type_name, whether terminal, etc.), bison.exe defines one +# 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. +# Prefixed by api.token.prefix if defined. +# - 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_tag: string +# When api.value.type=union, the generated name for the union member. +# yytype_INT etc. for symbols that has_id, otherwise yytype_1 etc. +# - type +# If it has a semantic value, its type tag, or, if variant are used, +# its type. +# In the case of api.value.type=union, type is the real type (e.g. int). +# - 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) # ---------------------- # Recover a FIELD about symbol #NUM. Thanks to m4_indir, fails if @@ -351,10 +400,10 @@ 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_([$1], [id])])], [b4_symbol_($@)])]) @@ -370,6 +419,14 @@ 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. @@ -383,19 +440,17 @@ m4_define([b4_symbol_action_location], # Same as in C, but using references instead of pointers. m4_define([b4_symbol_action], [b4_symbol_if([$1], [has_$2], -[m4_pushdef([b4_dollar_dollar], - [b4_symbol_value([(*yyvaluep)], - b4_symbol_if([$1], [has_type], - [b4_symbol([$1], [type])]))])dnl -m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl - b4_symbol_case_([$1]) +[b4_dollar_pushdef([(*yyvaluep)], + b4_symbol_if([$1], [has_type], + [m4_dquote(b4_symbol([$1], [type]))]), + [(*yylocationp)])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; -m4_popdef([b4_at_dollar])dnl -m4_popdef([b4_dollar_dollar])dnl +b4_dollar_popdef[]dnl ])]) @@ -406,11 +461,29 @@ m4_define([b4_symbol_destructor], [b4_symbol_action([$1], [destructor])]) m4_define([b4_symbol_printer], [b4_symbol_action([$1], [printer])]) +# b4_symbol_actions(KIND, [TYPE = yytype]) +# ---------------------------------------- +# Emit the symbol actions for KIND ("printer" or "destructor"). +# Dispatch on TYPE. +m4_define([b4_symbol_actions], +[m4_pushdef([b4_actions_], m4_expand([b4_symbol_foreach([b4_symbol_$1])]))dnl +m4_ifval(m4_defn([b4_actions_]), +[switch (m4_default([$2], [yytype])) + { + m4_defn([b4_actions_]) + default: + break; + }dnl +], +[YYUSE (m4_default([$2], [yytype]));])dnl +m4_popdef([b4_actions_])dnl +]) + # b4_symbol_case_(SYMBOL-NUM) # --------------------------- # 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])]) ]) @@ -420,6 +493,45 @@ m4_define([b4_symbol_case_], m4_define([b4_symbol_foreach], [m4_map([$1], m4_defn([b4_symbol_numbers]))]) +# b4_symbol_map(MACRO) +# -------------------- +# Return a list (possibly empty elements) of MACRO invoked for each +# SYMBOL-NUM. +m4_define([b4_symbol_map], +[m4_map_args_sep([$1(], [)], [,], b4_symbol_numbers)]) + + +# b4_token_visible_if(NUM, IF-TRUE, IF-FALSE) +# ------------------------------------------- +# Whether NUM denotes a token that has an exported definition (i.e., +# shows in enum yytokentype). +m4_define([b4_token_visible_if], +[b4_symbol_if([$1], [is_token], + [b4_symbol_if([$1], [has_id], [$2], [$3])], + [$3])]) + +# b4_token_has_definition(NUM) +# ---------------------------- +# 1 if NUM is visible, nothing otherwise. +m4_define([b4_token_has_definition], +[b4_token_visible_if([$1], [1])]) + +# b4_any_token_visible_if([IF-TRUE], [IF-FALSE]) +# ---------------------------------------------- +# Whether there is a token that needs to be defined. +m4_define([b4_any_token_visible_if], +[m4_ifval(b4_symbol_foreach([b4_token_has_definition]), + [$1], [$2])]) + + +# b4_token_format(FORMAT, NUM) +# ---------------------------- +m4_define([b4_token_format], +[b4_token_visible_if([$2], +[m4_quote(m4_format([$1], + [b4_symbol([$2], [id])], + [b4_symbol([$2], [user_number])]))])]) + ## ------- ## ## Types. ## @@ -429,13 +541,16 @@ m4_define([b4_symbol_foreach], # --------------------- # 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])]); - break; + break; ])]) @@ -463,11 +578,21 @@ 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) # ----------------------- @@ -489,14 +614,14 @@ 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) @@ -542,7 +667,7 @@ m4_pushdef([b4_start], m4_car(m4_shift(b4_occurrence)))dnl m4_pushdef([b4_end], m4_shift(m4_shift(b4_occurrence)))dnl m4_ifndef($3[(]m4_quote(b4_user_name)[)], [b4_complain_at([b4_start], [b4_end], - [[%s `%s' is not used]], + [[%s '%s' is not used]], [$1], [b4_user_name])])[]dnl m4_popdef([b4_occurrence])dnl m4_popdef([b4_user_name])dnl @@ -564,10 +689,11 @@ m4_define([b4_percent_define_use], [m4_define([b4_percent_define_bison_variables(]$1[)])dnl ]) -# b4_percent_define_get(VARIABLE) -# ------------------------------- -# Mimic muscle_percent_define_get in ../src/muscle-tab.h exactly. That is, if -# the %define variable VARIABLE is defined, emit its value. Also, record +# b4_percent_define_get(VARIABLE, [DEFAULT]) +# ------------------------------------------ +# Mimic muscle_percent_define_get in ../src/muscle-tab.h. That is, if +# the %define variable VARIABLE is defined, emit its value. Contrary +# to its C counterpart, return DEFAULT otherwise. Also, record # Bison's usage of VARIABLE by defining # b4_percent_define_bison_variables(VARIABLE). # @@ -576,7 +702,9 @@ m4_define([b4_percent_define_use], # b4_percent_define_get([[foo]]) m4_define([b4_percent_define_get], [b4_percent_define_use([$1])dnl -m4_ifdef([b4_percent_define(]$1[)], [m4_indir([b4_percent_define(]$1[)])])]) +b4_percent_define_ifdef_([$1], + [m4_indir([b4_percent_define(]$1[)])], + [$2])]) # b4_percent_define_get_loc(VARIABLE) # ----------------------------------- @@ -595,7 +723,21 @@ m4_define([b4_percent_define_get_loc], [m4_pushdef([b4_loc], m4_indir([b4_percent_define_loc(]$1[)]))dnl b4_loc[]dnl m4_popdef([b4_loc])], - [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_get_loc]], [$1])])]) + [b4_fatal([[$0: undefined %%define variable '%s']], [$1])])]) + +# b4_percent_define_get_kind(VARIABLE) +# ------------------------------------ +# Get the kind (code, keyword, string) of VARIABLE, i.e., how its +# value was defined (braces, not delimiters, quotes). +# +# If the %define variable VARIABLE is undefined, complain fatally +# since that's a Bison or skeleton error. Don't record this as a +# Bison usage of VARIABLE as there's no reason to suspect that the +# user-supplied value has yet influenced the output. +m4_define([b4_percent_define_get_kind], +[m4_ifdef([b4_percent_define_kind(]$1[)], + [m4_indir([b4_percent_define_kind(]$1[)])], + [b4_fatal([[$0: undefined %%define variable '%s']], [$1])])]) # b4_percent_define_get_syncline(VARIABLE) # ---------------------------------------- @@ -612,7 +754,20 @@ m4_popdef([b4_loc])], m4_define([b4_percent_define_get_syncline], [m4_ifdef([b4_percent_define_syncline(]$1[)], [m4_indir([b4_percent_define_syncline(]$1[)])], - [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_get_syncline]], [$1])])]) + [b4_fatal([[$0: undefined %%define variable '%s']], [$1])])]) + +# b4_percent_define_ifdef_(VARIABLE, IF-TRUE, [IF-FALSE]) +# ------------------------------------------------------ +# If the %define variable VARIABLE is defined, expand IF-TRUE, else expand +# IF-FALSE. Don't record usage of VARIABLE. +# +# For example: +# +# b4_percent_define_ifdef_([[foo]], [[it's defined]], [[it's undefined]]) +m4_define([b4_percent_define_ifdef_], +[m4_ifdef([b4_percent_define(]$1[)], + [$2], + [$3])]) # b4_percent_define_ifdef(VARIABLE, IF-TRUE, [IF-FALSE]) # ------------------------------------------------------ @@ -625,9 +780,9 @@ m4_define([b4_percent_define_get_syncline], # # b4_percent_define_ifdef([[foo]], [[it's defined]], [[it's undefined]]) m4_define([b4_percent_define_ifdef], -[m4_ifdef([b4_percent_define(]$1[)], - [b4_percent_define_use([$1])$2], - [$3])]) +[b4_percent_define_ifdef_([$1], + [b4_percent_define_use([$1])$2], + [$3])]) ## --------- ## @@ -653,14 +808,14 @@ m4_define([b4_percent_define_flag_if], [m4_case(b4_percent_define_get([$1]), [], [$2], [true], [$2], [false], [$3], [m4_expand_once([b4_complain_at(b4_percent_define_get_loc([$1]), - [[invalid value for %%define Boolean variable `%s']], + [[invalid value for %%define Boolean variable '%s']], [$1])], [[b4_percent_define_flag_if($1)]])])], - [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_flag_if]], [$1])])]) + [b4_fatal([[$0: undefined %%define variable '%s']], [$1])])]) -# b4_percent_define_default(VARIABLE, DEFAULT) -# -------------------------------------------- +# b4_percent_define_default(VARIABLE, DEFAULT, [KIND = keyword]) +# -------------------------------------------------------------- # Mimic muscle_percent_define_default in ../src/muscle-tab.h exactly. That is, # if the %define variable VARIABLE is undefined, set its value to DEFAULT. # Don't record this as a Bison usage of VARIABLE as there's no reason to @@ -670,25 +825,43 @@ m4_define([b4_percent_define_flag_if], # # b4_percent_define_default([[foo]], [[default value]]) m4_define([b4_percent_define_default], -[m4_ifndef([b4_percent_define(]$1[)], +[b4_percent_define_ifdef_([$1], [], [m4_define([b4_percent_define(]$1[)], [$2])dnl + m4_define([b4_percent_define_kind(]$1[)], + [m4_default([$3], [keyword])])dnl m4_define([b4_percent_define_loc(]$1[)], [[[[:-1.-1]], [[:-1.-1]]]])dnl 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_kind(VARIABLE, KIND, [DIAGNOSTIC = complain]) +# --------------------------------------------------------------------- +m4_define([b4_percent_define_check_kind], +[b4_percent_define_ifdef_([$1], + [m4_if(b4_percent_define_get_kind([$1]), [$2], [], + [b4_error([m4_default([$3], [complain])], + b4_percent_define_get_loc([$1]), + [m4_case([$2], + [code], [[%%define variable '%s' requires '{...}' values]], + [keyword], [[%%define variable '%s' requires keyword values]], + [string], [[%%define variable '%s' requires '"..."' values]])], + [$1])])])dnl +]) # b4_percent_define_check_values(VALUES) @@ -712,23 +885,24 @@ m4_define([b4_percent_define_check_values], [_b4_percent_define_check_values(b4_sublist)])]) m4_define([_b4_percent_define_check_values], -[m4_ifdef([b4_percent_define(]$1[)], - [m4_pushdef([b4_good_value], [0])dnl +[b4_percent_define_ifdef_([$1], + [b4_percent_define_check_kind(]$1[, [keyword], [deprecated])dnl + m4_pushdef([b4_good_value], [0])dnl m4_if($#, 1, [], [m4_foreach([b4_value], m4_dquote(m4_shift($@)), [m4_if(m4_indir([b4_percent_define(]$1[)]), b4_value, [m4_define([b4_good_value], [1])])])])dnl m4_if(b4_good_value, [0], [b4_complain_at(b4_percent_define_get_loc([$1]), - [[invalid value for %%define variable `%s': `%s']], + [[invalid value for %%define variable '%s': '%s']], [$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]), - [[accepted value: `%s']], + [b4_error([[note]], b4_percent_define_get_loc([$1]), [] + [[accepted value: '%s']], m4_dquote(b4_value))])])dnl m4_popdef([b4_good_value])], - [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_check_values]], [$1])])]) + [b4_fatal([[$0: undefined %%define variable '%s']], [$1])])]) # b4_percent_code_get([QUALIFIER]) # -------------------------------- @@ -762,28 +936,30 @@ m4_popdef([b4_macro_name])]) m4_define([b4_percent_code_ifdef], [m4_ifdef([b4_percent_code(]$1[)], [m4_ifval([$1], [m4_define([b4_percent_code_bison_qualifiers(]$1[)])])$2], - [$3])]) + [$3])]) ## ------------------ ## ## Common variables. ## ## ------------------ ## -# Default values for %define. -# --------------------------- -# If the api.tokens.prefix, it is empty. -m4_percent_define_default([[api.tokens.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]) @@ -799,6 +975,20 @@ m4_define([b4_error_verbose_flag], [verbose], [[1]])]) b4_define_flag_if([error_verbose]) +# yytoken_table is needed to support verbose errors. +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_define([b4_variant_flag], [[0]]) +b4_percent_define_ifdef([[api.value.type]], + [m4_case(b4_percent_define_get_kind([[api.value.type]]), [keyword], + [m4_case(b4_percent_define_get([[api.value.type]]), [variant], + [m4_define([b4_variant_flag], [[1]])])])]) +b4_define_flag_if([variant]) + ## ----------------------------------------------------------- ## ## After processing the skeletons, check that all the user's ## @@ -815,3 +1005,59 @@ m4_wrap_lifo([ b4_check_user_names_wrap([[define]], [[variable]]) b4_check_user_names_wrap([[code]], [[qualifier]]) ]) + + +## ---------------- ## +## Default values. ## +## ---------------- ## + +# m4_define_default([b4_lex_param], []) dnl breaks other skeletons +m4_define_default([b4_pre_prologue], []) +m4_define_default([b4_post_prologue], []) +m4_define_default([b4_epilogue], []) +m4_define_default([b4_parse_param], []) + +# The initial column and line. +m4_define_default([b4_location_initial_column], [1]) +m4_define_default([b4_location_initial_line], [1]) + + +## --------------- ## +## Sanity checks. ## +## --------------- ## + +# api.location.prefix={...} (Java and C++). +b4_percent_define_check_kind([api.location.type], [code], [deprecated]) + +# api.position.prefix={...} (Java). +b4_percent_define_check_kind([api.position.type], [code], [deprecated]) + +# api.prefix >< %name-prefix. +b4_percent_define_check_kind([api.prefix], [code], [deprecated]) +b4_percent_define_ifdef([api.prefix], +[m4_ifdef([b4_prefix], +[b4_complain_at(b4_percent_define_get_loc([api.prefix]), + [['%s' and '%s' cannot be used together]], + [%name-prefix], + [%define api.prefix])])]) + +# api.token.prefix={...} +# Make it a warning for those who used betas of Bison 3.0. +b4_percent_define_check_kind([api.token.prefix], [code], [deprecated]) + +# api.value.type >< %union. +b4_percent_define_ifdef([api.value.type], +[m4_ifdef([b4_union_members], +[b4_complain_at(b4_percent_define_get_loc([api.value.type]), + [['%s' and '%s' cannot be used together]], + [%union], + [%define api.value.type])])]) + +# api.value.type=union >< %yacc. +b4_percent_define_ifdef([api.value.type], +[m4_if(b4_percent_define_get([api.value.type]), [union], +[b4_yacc_if(dnl +[b4_complain_at(b4_percent_define_get_loc([api.value.type]), + [['%s' and '%s' cannot be used together]], + [%yacc], + [%define api.value.type "union"])])])])