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File Name : bison.m4

-*- Autoconf -*-

# Language-independent M4 Macros for Bison.

# Copyright (C) 2002, 2004-2015, 2018-2021 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 <https://www.gnu.org/licenses/>.

# m4_gsub(STRING, RE1, SUBST1, RE2, SUBST2, ...)
# ----------------------------------------------
# m4 equivalent of
#
#   $_ = STRING;
#   s/RE1/SUBST1/g;
#   s/RE2/SUBST2/g;
#   ...
#
# Really similar to m4_bpatsubsts, but behaves properly with quotes.
# See m4.at's "Generating Comments".  Super inelegant, but so far, I
# did not find any better solution.
m4_define([b4_gsub],
[m4_bpatsubst(m4_bpatsubst(m4_bpatsubst([[[[$1]]]],
                                        [$2], [$3]),
                           [$4], [$5]),
              [$6], [$7])])

# m4_shift2 and m4_shift3 are provided by m4sugar.
m4_define([m4_shift4], [m4_shift(m4_shift(m4_shift(m4_shift($@))))])

## ---------------- ##
## Identification.  ##
## ---------------- ##

# b4_generated_by
# ---------------
m4_define([b4_generated_by],
[b4_comment([A Bison parser, made by GNU Bison b4_version_string.])
])

# b4_copyright(TITLE, [YEARS])
# ----------------------------
# If YEARS are not defined, use b4_copyright_years.
m4_define([b4_copyright],
[b4_generated_by
b4_comment([$1

]m4_dquote(m4_text_wrap([Copyright (C)
]m4_ifval([$2], [[$2]], [m4_defn([b4_copyright_years])])[
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 <https://www.gnu.org/licenses/>.])

b4_comment([As a special exception, you may create a larger work that contains
part or all of the Bison parser skeleton and distribute that work
under terms of your choice, so long as that work isn't itself a
parser generator using the skeleton or a modified version thereof
as a parser skeleton.  Alternatively, if you modify or redistribute
the parser skeleton itself, you may (at your option) remove this
special exception, which will cause the skeleton and the resulting
Bison output files to be licensed under the GNU General Public
License without this special exception.

This special exception was added by the Free Software Foundation in
version 2.2 of Bison.])
])

# b4_disclaimer
# -------------
# Issue a warning about private implementation details.
m4_define([b4_disclaimer],
[b4_comment([DO NOT RELY ON FEATURES THAT ARE NOT DOCUMENTED in the manual,
especially those whose name start with YY_ or yy_.  They are
private implementation details that can be changed or removed.])
])

# b4_required_version_if(VERSION, IF_NEWER, IF_OLDER)
# ---------------------------------------------------
# If the version %require'd by the user is VERSION (or newer) expand
# IF_NEWER, otherwise IF_OLDER.  VERSION should be an integer, e.g.,
# 302 for 3.2.
m4_define([b4_required_version_if],
[m4_if(m4_eval($1 <= b4_required_version),
              [1], [$2], [$3])])

## -------- ##
## Output.  ##
## -------- ##

# b4_output_begin(FILE1, FILE2)
# -----------------------------
# Enable output, i.e., send to diversion 0, expand after "#", and
# generate the tag to output into FILE.  Must be followed by EOL.
# FILE is FILE1 concatenated to FILE2.  FILE2 can be empty, or be
# absolute: do the right thing.
m4_define([b4_output_begin],
[m4_changecom()
m4_divert_push(0)dnl
@output(m4_unquote([$1])@,m4_unquote([$2])@)@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.  ##
## ---------------- ##

# The following error handling macros print error directives that should not
# become arguments of other macro invocations since they would likely then be
# mangled.  Thus, they print to stdout directly.

# b4_cat(TEXT)
# ------------
# Write TEXT to stdout.  Precede the final newline with an @ so that it's
# escaped.  For example:
#
#   b4_cat([[@complain(invalid input@)]])
m4_define([b4_cat],
[m4_syscmd([cat <<'_m4eof'
]m4_bpatsubst(m4_dquote($1), [_m4eof], [_m4@`eof])[@
_m4eof
])dnl
m4_if(m4_sysval, [0], [], [m4_fatal([$0: cannot write to stdout])])])

# b4_error(KIND, START, END, FORMAT, [ARG1], [ARG2], ...)
# -------------------------------------------------------
# Write @KIND(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
#
# For example:
#
#   b4_error([[complain]], [[input.y:2.3]], [[input.y:5.4]],
#            [[invalid %s]], [[foo]])
m4_define([b4_error],
[b4_cat([[@complain][(]$1[@,]$2[@,]$3[@,]$4[]]dnl
[m4_if([$#], [4], [],
       [m4_foreach([b4_arg],
                   m4_dquote(m4_shift4($@)),
                   [[@,]b4_arg])])[@)]])])

# b4_warn(FORMAT, [ARG1], [ARG2], ...)
# ------------------------------------
# Write @warn(FORMAT@,ARG1@,ARG2@,...@) to stdout.
#
# For example:
#
#   b4_warn([[invalid value for '%s': %s]], [[foo]], [[3]])
#
# As a simple test suite, this:
#
#   m4_divert(-1)
#   m4_define([asdf], [ASDF])
#   m4_define([fsa], [FSA])
#   m4_define([fdsa], [FDSA])
#   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_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_warn_at([], [], $@)])

# b4_warn_at(START, END, FORMAT, [ARG1], [ARG2], ...)
# ---------------------------------------------------
# Write @warn(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
#
# For example:
#
#   b4_warn_at([[input.y:2.3]], [[input.y:5.4]], [[invalid %s]], [[foo]])
m4_define([b4_warn_at],
[b4_error([[warn]], $@)])

# b4_complain(FORMAT, [ARG1], [ARG2], ...)
# ----------------------------------------
# Bounce to b4_complain_at.
#
# See b4_warn example.
m4_define([b4_complain],
[b4_complain_at([], [], $@)])

# b4_complain_at(START, END, FORMAT, [ARG1], [ARG2], ...)
# -------------------------------------------------------
# Write @complain(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
#
# See b4_warn_at example.
m4_define([b4_complain_at],
[b4_error([[complain]], $@)])

# b4_fatal(FORMAT, [ARG1], [ARG2], ...)
# -------------------------------------
# Bounce to b4_fatal_at.
#
# See b4_warn example.
m4_define([b4_fatal],
[b4_fatal_at([], [], $@)])

# b4_fatal_at(START, END, FORMAT, [ARG1], [ARG2], ...)
# ----------------------------------------------------
# Write @fatal(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout and exit.
#
# See b4_warn_at example.
m4_define([b4_fatal_at],
[b4_error([[fatal]], $@)dnl
m4_exit(1)])

# b4_canary(MSG)
# --------------
# Issue a warning on stderr and in the output.  Used in the test suite
# to catch spurious m4 evaluations.
m4_define([b4_canary],
[m4_errprintn([dead canary: $1])DEAD CANARY($1)])

## ------------ ##
## Data Types.  ##
## ------------ ##

# b4_ints_in(INT1, INT2, LOW, HIGH)
# ---------------------------------
# Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise.
m4_define([b4_ints_in],
[m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])])

# b4_subtract(LHS, RHS)
# ---------------------
# Evaluate LHS - RHS if they are integer literals, otherwise expand
# to (LHS) - (RHS).
m4_define([b4_subtract],
[m4_bmatch([$1$2], [^[0123456789]*$],
           [m4_eval([$1 - $2])],
           [($1) - ($2)])])

# b4_join(ARG1, ...)
# _b4_join(ARG1, ...)
# -------------------
# Join with comma, skipping empty arguments.
# b4_join calls itself recursively until it sees the first non-empty
# argument, then calls _b4_join (i.e., `_$0`) which prepends each
# non-empty argument with a comma.
m4_define([b4_join],
[m4_if([$#$1],
       [1], [],
       [m4_ifval([$1],
                 [$1[]_$0(m4_shift($@))],
                 [$0(m4_shift($@))])])])

# _b4_join(ARGS1, ...)
# --------------------
m4_define([_b4_join],
[m4_if([$#$1],
       [1], [],
       [m4_ifval([$1], [, $1])[]$0(m4_shift($@))])])

# b4_integral_parser_tables_map(MACRO)
# -------------------------------------
# Map MACRO on all the integral tables.  MACRO is expected to have
# the signature MACRO(TABLE-NAME, CONTENT, COMMENT).
m4_define([b4_integral_parser_tables_map],
[$1([pact], [b4_pact],
    [[YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
STATE-NUM.]])

$1([defact], [b4_defact],
   [[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 whose
number is the opposite.  If YYTABLE_NINF, syntax error.]])

$1([check], [b4_check])

$1([stos], [b4_stos],
   [[YYSTOS[STATE-NUM] -- The symbol kind of the accessing symbol of
state STATE-NUM.]])

$1([r1], [b4_r1],
   [[YYR1[RULE-NUM] -- Symbol kind of the left-hand side of rule RULE-NUM.]])

$1([r2], [b4_r2],
   [[YYR2[RULE-NUM] -- Number of symbols on the right-hand side of rule RULE-NUM.]])
])

# b4_parser_tables_declare
# b4_parser_tables_define
# ------------------------
# Define/declare the (deterministic) parser tables.
m4_define([b4_parser_tables_declare],
[b4_integral_parser_tables_map([b4_integral_parser_table_declare])])

m4_define([b4_parser_tables_define],
[b4_integral_parser_tables_map([b4_integral_parser_table_define])])

## ------------------ ##
## Decoding options.  ##
## ------------------ ##

# b4_flag_if(FLAG, IF-TRUE, IF-FALSE)
# -----------------------------------
# Run IF-TRUE if b4_FLAG_flag is 1, IF-FALSE if FLAG is 0, otherwise fail.
m4_define([b4_flag_if],
[m4_case(b4_$1_flag,
         [0], [$3],
         [1], [$2],
         [m4_fatal([invalid $1 value: ]b4_$1_flag)])])

# b4_define_flag_if(FLAG)
# -----------------------
# Define "b4_FLAG_if(IF-TRUE, IF-FALSE)" that depends on the
# value of the Boolean FLAG.
m4_define([b4_define_flag_if],
[_b4_define_flag_if($[1], $[2], [$1])])

# _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
# $$1 a la M5/TeX.
m4_define([_b4_define_flag_if],
[m4_if([$1$2], $[1]$[2], [],
       [m4_fatal([$0: Invalid arguments: $@])])dnl
m4_define([b4_$3_if],
          [b4_flag_if([$3], [$1], [$2])])])

# b4_FLAG_if(IF-TRUE, IF-FALSE)
# -----------------------------
# Expand IF-TRUE, if FLAG is true, IF-FALSE otherwise.
b4_define_flag_if([glr])                # Whether a GLR parser is requested.
b4_define_flag_if([has_translations])   # Whether some tokens are internationalized.
b4_define_flag_if([header])             # Whether a header 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.

# b4_glr_cc_if([IF-TRUE], [IF-FALSE])
# -----------------------------------
m4_define([b4_glr_cc_if],
          [m4_if(b4_skeleton, ["glr.cc"], $@)])

# b4_glr2_cc_if([IF-TRUE], [IF-FALSE])
# ------------------------------------
m4_define([b4_glr2_cc_if],
          [m4_if(b4_skeleton, ["glr2.cc"], $@)])

## --------- ##
## Symbols.  ##
## --------- ##

# For a description of the Symbol handling, see README.md.
#
# The following macros provide access to symbol related values.

# __b4_symbol(NUM, FIELD)
# -----------------------
# Fetch FIELD of symbol #NUM.  Fail if undefined.
m4_define([__b4_symbol],
[m4_indir([b4_symbol($1, $2)])])

# _b4_symbol(NUM, FIELD)
# ----------------------
# Fetch FIELD of symbol #NUM (or "orig NUM", see README.md).
# Fail if undefined.
m4_define([_b4_symbol],
[m4_ifdef([b4_symbol($1, number)],
          [__b4_symbol(m4_indir([b4_symbol($1, number)]), $2)],
          [__b4_symbol([$1], [$2])])])

# b4_symbol_token_kind(NUM)
# -------------------------
# The token kind of this symbol.
m4_define([b4_symbol_token_kind],
[b4_percent_define_get([api.token.prefix])dnl
_b4_symbol([$1], [id])])

# b4_symbol_kind_base(NUM)
# ------------------------
# Build the name of the kind of this symbol.  It must always exist,
# otherwise some symbols might not be represented in the enum, which
# might be compiled into too small a type to contain all the symbol
# numbers.
m4_define([b4_symbol_prefix], [b4_percent_define_get([api.symbol.prefix])])
m4_define([b4_symbol_kind_base],
[b4_percent_define_get([api.symbol.prefix])dnl
m4_case([$1],
  [-2],                             [[YYEMPTY]],
  [0],                              [[YYEOF]],
  [1],                              [[YYerror]],
  [2],                              [[YYUNDEF]],
  [m4_case(b4_symbol([$1], [tag]),
      [$accept],                    [[YYACCEPT]],
      [b4_symbol_if([$1], [has_id], _b4_symbol([$1], [id]),
                                    [m4_bpatsubst([$1-][]_b4_symbol([$1], [tag]), [[^a-zA-Z_0-9]+], [_])])])])])

# b4_symbol_kind(NUM)
# -------------------
# Same as b4_symbol_kind, but possibly with a prefix in some
# languages.  E.g., EOF's kind_base and kind are YYSYMBOL_YYEOF in C,
# but are S_YYEMPTY and symbol_kind::S_YYEMPTY in C++.
m4_copy([b4_symbol_kind_base], [b4_symbol_kind])

# b4_symbol_slot(NUM)
# -------------------
# The name of union member that contains the value of these symbols.
# Currently, we are messy, this should actually be type_tag, but type_tag
# has several meanings.
m4_define([b4_symbol_slot],
[m4_case(b4_percent_define_get([[api.value.type]]),
         [union],   [b4_symbol([$1], [type_tag])],
         [variant], [b4_symbol([$1], [type_tag])],
         [b4_symbol([$1], [type])])])

# b4_symbol(NUM, FIELD)
# ---------------------
# Fetch FIELD of symbol #NUM (or "orig NUM", or "empty").  Fail if undefined.
#
# If FIELD = id, prepend the token prefix.
m4_define([b4_symbol],
[m4_if([$1], [empty], [b4_symbol([-2], [$2])],
       [$1], [eof],   [b4_symbol([0], [$2])],
       [$1], [error], [b4_symbol([1], [$2])],
       [$1], [undef], [b4_symbol([2], [$2])],
       [m4_case([$2],
                [id],        [b4_symbol_token_kind([$1])],
                [kind_base], [b4_symbol_kind_base([$1])],
                [kind],      [b4_symbol_kind([$1])],
                [slot],      [b4_symbol_slot([$1])],
                [_b4_symbol($@)])])])

# b4_symbol_if(NUM, FIELD, IF-TRUE, IF-FALSE)
# -------------------------------------------
# If FIELD about symbol #NUM is 1 expand IF-TRUE, if is 0, expand IF-FALSE.
# Otherwise an error.
m4_define([b4_symbol_if],
[m4_case(b4_symbol([$1], [$2]),
         [1], [$3],
         [0], [$4],
         [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(SYMBOL-NUM, ACTION)
# ------------------------------------
# Run the action ACTION ("destructor" or "printer") for SYMBOL-NUM.
m4_define([b4_symbol_action],
[b4_symbol_if([$1], [has_$2],
[b4_dollar_pushdef([(*yyvaluep)],
                   [$1],
                   [],
                   [(*yylocationp)])dnl
    _b4_symbol_case([$1])[]dnl
b4_syncline([b4_symbol([$1], [$2_line])], [b4_symbol([$1], [$2_file])])dnl
b4_symbol([$1], [$2])
b4_syncline([@oline@], [@ofile@])dnl
        break;

b4_dollar_popdef[]dnl
])])

# b4_symbol_destructor(SYMBOL-NUM)
# b4_symbol_printer(SYMBOL-NUM)
# --------------------------------
m4_define([b4_symbol_destructor], [b4_symbol_action([$1], [destructor])])
m4_define([b4_symbol_printer],    [b4_symbol_action([$1], [printer])])

# b4_symbol_actions(ACTION, [KIND = yykind])
# ------------------------------------------
# Emit the symbol actions for ACTION ("destructor" or "printer").
# Dispatch on KIND.
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], [yykind]))
    {
m4_defn([b4_actions_])[]dnl
      default:
        break;
    }dnl
],
[b4_use(m4_default([$2], [yykind]));])dnl
m4_popdef([b4_actions_])dnl
])

# _b4_symbol_case(SYMBOL-NUM)
# ---------------------------
# Issue a "case NUM" for SYMBOL-NUM.  Ends with its EOL to make it
# easier to use with m4_map, but then, use []dnl to suppress the last
# one.
m4_define([_b4_symbol_case],
[case b4_symbol([$1], [kind]): b4_symbol_tag_comment([$1])])
])

# b4_symbol_foreach(MACRO)
# ------------------------
# Invoke MACRO(SYMBOL-NUM) for each SYMBOL-NUM.
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 kind 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)
# ----------------------------
# If token NUM has a visible ID, format FORMAT with ID, USER_NUMBER.
m4_define([b4_token_format],
[b4_token_visible_if([$2],
[m4_format([[$1]],
           b4_symbol([$2], [id]),
           b4_symbol([$2], b4_api_token_raw_if([[number]], [[code]])))])])

# b4_last_enum_token
# ------------------
# The code of the last token visible token.
m4_define([_b4_last_enum_token],
[b4_token_visible_if([$1],
   [m4_define([b4_last_enum_token], [$1])])])
b4_symbol_foreach([_b4_last_enum_token])

# b4_last_symbol
# --------------
# The code of the last symbol.
m4_define([b4_last_symbol], m4_eval(b4_tokens_number + b4_nterms_number - 1))

## ------- ##
## Types.  ##
## ------- ##

# _b4_type_action(NUMS)
# ---------------------
# 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(SYMBOL-NUM,
# TAG, TYPE).
m4_define([_b4_type_action],
[b4_symbol_if([$1], [has_type],
[m4_map([      _b4_symbol_case], [$@])[]dnl
        b4_dollar_dollar([b4_symbol([$1], [number])],
                         [b4_symbol([$1], [tag])],
                         [b4_symbol([$1], [type])]);
        break;

])])

# b4_type_foreach(MACRO, [SEP])
# -----------------------------
# Invoke MACRO(SYMBOL-NUMS) for each set of SYMBOL-NUMS for each type set.
m4_define([b4_type_foreach],
          [m4_map_sep([$1], [$2], m4_defn([b4_type_names]))])

## ----------- ##
## Synclines.  ##
## ----------- ##

# b4_basename(NAME)
# -----------------
# Similar to POSIX basename; the differences don't matter here.
# Beware that NAME is not evaluated.
m4_define([b4_basename],
[m4_bpatsubst([$1], [^.*/$[^/]+$/*$], [\1])])

# b4_syncline(LINE, FILE)dnl
# --------------------------
# Should always be following by a dnl.
#
# Emit "#line LINE FILE /* __LINE__ __FILE__ */".
m4_define([b4_syncline],
[b4_flag_if([synclines],
[b4_sync_start([$1], [$2])[]dnl
b4_sync_end([__line__], [b4_basename(m4_quote(__file__))])
])])

# 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])]
)
# This generates dependencies on the Bison skeletons hence lots of
# useless 'git diff'.  This location is useless for the regular
# user (who does not care about the skeletons) and is actually not
# useful for Bison developers too (I, Akim, never used this to locate
# the code in skeletons that generated output).  So disable it
# completely.  If someone thinks this was actually useful, a %define
# variable should be provided to control the level of verbosity of
# '#line', in replacement of --no-lines.
m4_define([b4_sync_end])

# b4_user_code(USER-CODE)
# -----------------------
# Emit code from the user, ending it with synclines.
m4_define([b4_user_code],
[$1
b4_syncline([@oline@], [@ofile@])])

# b4_define_user_code(MACRO, COMMENT)
# -----------------------------------
# From b4_MACRO, if defined, build b4_user_MACRO that includes the synclines.
m4_define([b4_define_user_code],
[m4_define([b4_user_$1],
           [m4_ifdef([b4_$1],
                     [m4_ifval([$2],
                               [b4_comment([$2])
])b4_user_code([b4_$1])])])])

# b4_user_actions
# b4_user_initial_action
# b4_user_post_prologue
# b4_user_pre_prologue
# b4_user_union_members
# ----------------------
# Macros that issue user code, ending with synclines.
b4_define_user_code([actions])
b4_define_user_code([initial_action], [User initialization code.])
b4_define_user_code([post_prologue], [Second part of user prologue.])
b4_define_user_code([pre_prologue], [First part of user prologue.])
b4_define_user_code([union_members])

# b4_check_user_names(WHAT, USER-LIST, BISON-NAMESPACE)
# -----------------------------------------------------
# Complain if any name of type WHAT is used by the user (as recorded in
# USER-LIST) but is not used by Bison (as recorded by macros in the
# namespace BISON-NAMESPACE).
#
# USER-LIST must expand to a list specifying all user occurrences of all names
# of type WHAT.   Each item in the list must be a triplet specifying one
# occurrence: name, start boundary, and end boundary.  Empty string names are
# fine.  An empty list is fine.
#
# For example, to define b4_foo_user_names to be used for USER-LIST with three
# name occurrences and with correct quoting:
#
#   m4_define([b4_foo_user_names],
#             [[[[[[bar]], [[parser.y:1.7]], [[parser.y:1.16]]]],
#               [[[[bar]], [[parser.y:5.7]], [[parser.y:5.16]]]],
#               [[[[baz]], [[parser.y:8.7]], [[parser.y:8.16]]]]]])
#
# The macro BISON-NAMESPACE(bar) must be defined iff the name bar of type WHAT
# is used by Bison (in the front-end or in the skeleton).  Empty string names
# are fine, but it would be ugly for Bison to actually use one.
#
# For example, to use b4_foo_bison_names for BISON-NAMESPACE and define that
# the names bar and baz are used by Bison:
#
#   m4_define([b4_foo_bison_names(bar)])
#   m4_define([b4_foo_bison_names(baz)])
#
# To invoke b4_check_user_names with TYPE foo, with USER-LIST
# b4_foo_user_names, with BISON-NAMESPACE b4_foo_bison_names, and with correct
# quoting:
#
#   b4_check_user_names([[foo]], [b4_foo_user_names],
#                       [[b4_foo_bison_names]])
m4_define([b4_check_user_names],
[m4_foreach([b4_occurrence], $2,
[m4_pushdef([b4_occurrence], b4_occurrence)dnl
m4_pushdef([b4_user_name], m4_car(b4_occurrence))dnl
m4_pushdef([b4_start], m4_car(m4_shift(b4_occurrence)))dnl
m4_pushdef([b4_end], m4_shift2(b4_occurrence))dnl
m4_ifndef($3[(]m4_quote(b4_user_name)[)],
          [b4_complain_at([b4_start], [b4_end],
                          [[%s '%s' is not used]],
                          [$1], [b4_user_name])])[]dnl
m4_popdef([b4_occurrence])dnl
m4_popdef([b4_user_name])dnl
m4_popdef([b4_start])dnl
m4_popdef([b4_end])dnl
])])

## --------------------- ##
## b4_percent_define_*.  ##
## --------------------- ##

# b4_percent_define_use(VARIABLE)
# -------------------------------
# Declare that VARIABLE was used.
m4_define([b4_percent_define_use],
[m4_define([b4_percent_define_bison_variables(]$1[)])dnl
])

# 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).
#
# For example:
#
#   b4_percent_define_get([[foo]])
m4_define([b4_percent_define_get],
[b4_percent_define_use([$1])dnl
_b4_percent_define_ifdef([$1],
                         [m4_indir([b4_percent_define(]$1[)])],
                         [$2])])

# b4_percent_define_get_loc(VARIABLE)
# -----------------------------------
# Mimic muscle_percent_define_get_loc in ../src/muscle-tab.h exactly.  That is,
# if the %define variable VARIABLE is undefined, complain fatally since that's
# a Bison or skeleton error.  Otherwise, return its definition location in a
# form appropriate for the first two arguments of b4_warn_at, b4_complain_at, or
# b4_fatal_at.  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.
#
# For example:
#
#   b4_complain_at(b4_percent_define_get_loc([[foo]]), [[invalid foo]])
m4_define([b4_percent_define_get_loc],
[m4_ifdef([b4_percent_define_loc(]$1[)],
          [m4_pushdef([b4_loc], m4_indir([b4_percent_define_loc(]$1[)]))dnl
b4_loc[]dnl
m4_popdef([b4_loc])],
          [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)dnl
# -------------------------------------------
# Should always be following by a dnl.
#
# Mimic muscle_percent_define_get_syncline in ../src/muscle-tab.h exactly.
# That is, if the %define variable VARIABLE is undefined, complain fatally
# since that's a Bison or skeleton error.  Otherwise, return its definition
# location as a b4_syncline invocation.  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.
#
# For example:
#
#   b4_percent_define_get_syncline([[foo]])
m4_define([b4_percent_define_get_syncline],
[m4_ifdef([b4_percent_define_syncline(]$1[)],
          [m4_indir([b4_percent_define_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])
# ------------------------------------------------------
# Mimic muscle_percent_define_ifdef in ../src/muscle-tab.h exactly.  That is,
# if the %define variable VARIABLE is defined, expand IF-TRUE, else expand
# IF-FALSE.  Also, record Bison's usage of VARIABLE by defining
# b4_percent_define_bison_variables(VARIABLE).
#
# For example:
#
#   b4_percent_define_ifdef([[foo]], [[it's defined]], [[it's undefined]])
m4_define([b4_percent_define_ifdef],
[_b4_percent_define_ifdef([$1],
                         [b4_percent_define_use([$1])$2],
                         [$3])])

# b4_percent_define_check_file_complain(VARIABLE)
# -----------------------------------------------
# Warn about %define variable VARIABLE having an incorrect
# value.
m4_define([b4_percent_define_check_file_complain],
[b4_complain_at(b4_percent_define_get_loc([$1]),
                [[%%define variable '%s' requires 'none' or '"..."' values]],
                [$1])])

# b4_percent_define_check_file(MACRO, VARIABLE, DEFAULT)
# ------------------------------------------------------
# If the %define variable VARIABLE:
# - is undefined, then if DEFAULT is non-empty, define MACRO to DEFAULT
# - is a string, define MACRO to its value
# - is the keyword 'none', do nothing
# - otherwise, warn about the incorrect value.
m4_define([b4_percent_define_check_file],
[b4_percent_define_ifdef([$2],
  [m4_case(b4_percent_define_get_kind([$2]),
    [string],
         [m4_define([$1], b4_percent_define_get([$2]))],
    [keyword],
         [m4_if(b4_percent_define_get([$2]), [none], [],
                [b4_percent_define_check_file_complain([$2])])],
    [b4_percent_define_check_file_complain([$2])])
   ],
   [m4_ifval([$3],
             [m4_define([$1], [$3])])])
])

## --------- ##
## Options.  ##
## --------- ##

# b4_percent_define_flag_if(VARIABLE, IF-TRUE, [IF-FALSE])
# --------------------------------------------------------
# Mimic muscle_percent_define_flag_if in ../src/muscle-tab.h exactly.  That is,
# if the %define variable VARIABLE is defined to "" or "true", expand IF-TRUE.
# If it is defined to "false", expand IF-FALSE.  Complain if it is undefined
# (a Bison or skeleton error since the default value should have been set
# already) or defined to any other value (possibly a user error).  Also, record
# Bison's usage of VARIABLE by defining
# b4_percent_define_bison_variables(VARIABLE).
#
# For example:
#
#   b4_percent_define_flag_if([[foo]], [[it's true]], [[it's false]])
m4_define([b4_percent_define_flag_if],
[b4_percent_define_ifdef([$1],
  [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']],
                                           [$1])],
                           [[b4_percent_define_flag_if($1)]])])],
  [b4_fatal([[$0: undefined %%define variable '%s']], [$1])])])

# 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
# suspect that the value has yet influenced the output.
#
# For example:
#
#   b4_percent_define_default([[foo]], [[default value]])
m4_define([_b4_percent_define_define],
[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[)],
          [[[[<skeleton default value>:-1.-1]],
            [[<skeleton default value>:-1.-1]]]])dnl
m4_define([b4_percent_define_syncline(]$1[)], [[]])])

m4_define([b4_percent_define_default],
[_b4_percent_define_ifdef([$1], [],
                          [_b4_percent_define_define($@)])])

# 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_default([m4_default([$2], [$1])], [[false]])dnl
b4_percent_define_flag_if(m4_default([$2], [$1]),
                                     [$3], [$4])])])

m4_define([b4_percent_define_if_define],
[_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)
# --------------------------------------
# Mimic muscle_percent_define_check_values in ../src/muscle-tab.h exactly
# except that the VALUES structure is more appropriate for M4.  That is, VALUES
# is a list of sublists of strings.  For each sublist, the first string is the
# name of a %define variable, and all remaining strings in that sublist are the
# valid values for that variable.  Complain if such a variable is undefined (a
# Bison error since the default value should have been set already) or defined
# to any other value (possibly a user error).  Don't record this as a Bison
# usage of the variable as there's no reason to suspect that the value has yet
# influenced the output.
#
# For example:
#
#   b4_percent_define_check_values([[[[foo]], [[foo-value1]], [[foo-value2]]]],
#                                  [[[[bar]], [[bar-value1]]]])
m4_define([b4_percent_define_check_values],
[m4_foreach([b4_sublist], m4_quote($@),
            [_b4_percent_define_check_values(b4_sublist)])])

m4_define([_b4_percent_define_check_values],
[_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']],
                         [$1],
                         m4_dquote(m4_indir([b4_percent_define(]$1[)])))
          m4_foreach([b4_value], m4_dquote(m4_shift($@)),
                     [b4_error([[note]], b4_percent_define_get_loc([$1]), []
                                     [[accepted value: '%s']],
                                     m4_dquote(b4_value))])])dnl
   m4_popdef([b4_good_value])],
  [b4_fatal([[$0: undefined %%define variable '%s']], [$1])])])

# b4_percent_code_get([QUALIFIER])
# --------------------------------
# If any %code blocks for QUALIFIER are defined, emit them beginning with a
# comment and ending with synclines and a newline.  If QUALIFIER is not
# specified or empty, do this for the unqualified %code blocks.  Also, record
# Bison's usage of QUALIFIER (if specified) by defining
# b4_percent_code_bison_qualifiers(QUALIFIER).
#
# For example, to emit any unqualified %code blocks followed by any %code
# blocks for the qualifier foo:
#
#   b4_percent_code_get
#   b4_percent_code_get([[foo]])
m4_define([b4_percent_code_get],
[m4_pushdef([b4_macro_name], [[b4_percent_code(]$1[)]])dnl
m4_ifval([$1], [m4_define([b4_percent_code_bison_qualifiers(]$1[)])])dnl
m4_ifdef(b4_macro_name,
[b4_comment(m4_if([$#], [0], [[[Unqualified %code blocks.]]],
                  [[["%code ]$1[" blocks.]]]))
b4_user_code([m4_indir(b4_macro_name)])])dnl
m4_popdef([b4_macro_name])])

# b4_percent_code_ifdef(QUALIFIER, IF-TRUE, [IF-FALSE])
# -----------------------------------------------------
# If any %code blocks for QUALIFIER (or unqualified %code blocks if
# QUALIFIER is empty) are defined, expand IF-TRUE, else expand IF-FALSE.
# Also, record Bison's usage of QUALIFIER (if specified) by defining
# b4_percent_code_bison_qualifiers(QUALIFIER).
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])])

## ------------------ ##
## Common variables.  ##
## ------------------ ##

# b4_parse_assert_if([IF-ASSERTIONS-ARE-USED], [IF-NOT])
# b4_parse_trace_if([IF-DEBUG-TRACES-ARE-ENABLED], [IF-NOT])
# b4_token_ctor_if([IF-YYLEX-RETURNS-A-TOKEN], [IF-NOT])
# ----------------------------------------------------------
b4_percent_define_if_define([api.token.raw])
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([posix])

# 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])])])

# %define parse.error "(custom|detailed|simple|verbose)"
# ------------------------------------------------------
b4_percent_define_default([[parse.error]], [[simple]])
b4_percent_define_check_values([[[[parse.error]],
                                 [[custom]], [[detailed]], [[simple]], [[verbose]]]])

# b4_parse_error_case(CASE1, THEN1, CASE2, THEN2, ..., ELSE)
# ----------------------------------------------------------
m4_define([b4_parse_error_case],
[m4_case(b4_percent_define_get([[parse.error]]), $@)])

# b4_parse_error_bmatch(PATTERN1, THEN1, PATTERN2, THEN2, ..., ELSE)
# ------------------------------------------------------------------
m4_define([b4_parse_error_bmatch],
[m4_bmatch(b4_percent_define_get([[parse.error]]), $@)])

# b4_union_if([IF-UNION-ARE-USED], [IF-NOT])
# b4_variant_if([IF-VARIANT-ARE-USED], [IF-NOT])
# ----------------------------------------------
# Depend on whether api.value.type is union, or variant.
m4_define([b4_union_flag],   [[0]])
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]]),
                     [union],   [m4_define([b4_union_flag],   [[1]])],
                     [variant], [m4_define([b4_variant_flag], [[1]])])])])
b4_define_flag_if([union])
b4_define_flag_if([variant])

## ----------------------------------------------------------- ##
## After processing the skeletons, check that all the user's   ##
## %define variables and %code qualifiers were used by Bison.  ##
## ----------------------------------------------------------- ##

m4_define([b4_check_user_names_wrap],
[m4_ifdef([b4_percent_]$1[_user_]$2[s],
          [b4_check_user_names([[%]$1 $2],
                               [b4_percent_]$1[_user_]$2[s],
                               [[b4_percent_]$1[_bison_]$2[s]])])])

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_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.type={...} (C, C++ and Java).
b4_percent_define_check_kind([api.location.type], [code], [deprecated])

# api.position.type={...} (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"])])])])

# api.value.union.name.
b4_percent_define_check_kind([api.value.union.name], [keyword])

# parse.error (custom|detailed) >< token-table.
b4_token_table_if(
[b4_parse_error_bmatch([custom\|detailed],
[b4_complain_at(b4_percent_define_get_loc([parse.error]),
                [['%s' and '%s' cannot be used together]],
                [%token-table],
                [%define parse.error (custom|detailed)])])])

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..	dir	-	0/0	0755	2024-07-24 11:58:04
bison.m4	text/plain	42.36 KB	0/0	0644	2024-07-09 03:16:13
c++-skel.m4	text/plain	1.14 KB	0/0	0644	2024-07-09 03:16:13
c++.m4	text/x-c	22.53 KB	0/0	0644	2024-07-09 03:16:13
c-like.m4	text/plain	2.5 KB	0/0	0644	2024-07-09 03:16:13
c-skel.m4	text/plain	1.14 KB	0/0	0644	2024-07-09 03:16:13
c.m4	text/x-c	33.73 KB	0/0	0644	2024-07-09 03:16:13
d-skel.m4	text/plain	1.11 KB	0/0	0644	2024-07-09 03:16:13
d.m4	text/plain	19.04 KB	0/0	0644	2024-07-09 03:16:13
glr.c	text/x-c	89.19 KB	0/0	0644	2024-07-09 03:16:13
glr.cc	text/x-c	12.37 KB	0/0	0644	2024-07-09 03:16:13
glr2.cc	text/x-c++	112.32 KB	0/0	0644	2024-07-09 03:16:13
java-skel.m4	text/plain	1.14 KB	0/0	0644	2024-07-09 03:16:13
java.m4	text/plain	14.25 KB	0/0	0644	2024-07-09 03:16:13
lalr1.cc	text/x-c++	50.34 KB	0/0	0644	2024-07-09 03:16:13
lalr1.d	text/x-java	42.48 KB	0/0	0644	2024-07-09 03:16:13
lalr1.java	text/x-java	44.29 KB	0/0	0644	2024-07-09 03:16:13
location.cc	text/x-c++	10.15 KB	0/0	0644	2024-07-09 03:16:13
stack.hh	text/x-c++	3.91 KB	0/0	0644	2024-07-09 03:16:13
traceon.m4	text/x-m4	87 B	0/0	0644	2024-07-09 03:16:13
variant.hh	text/x-c++	14.68 KB	0/0	0644	2024-07-09 03:16:13
yacc.c	text/plain	73.24 KB	0/0	0644	2024-07-09 03:16:13