/usr/share/bison/c-like.m4 is in bison 2:3.0.2.dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 | -*- Autoconf -*-
# Common code for C-like languages (C, C++, Java, etc.)
# Copyright (C) 2012-2013 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
# 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/>.
# b4_comment_(TEXT, OPEN, CONTINUE, END)
# --------------------------------------
# Put TEXT in comment. Avoid trailing spaces: don't indent empty lines.
# Avoid adding indentation to the first line, as the indentation comes
# from OPEN. That's why we don't patsubst([$1], [^\(.\)], [ \1]).
#
# Prefix all the output lines with PREFIX.
m4_define([b4_comment_],
[$2[]m4_bpatsubst(m4_expand([[$1]]), [
\(.\)], [
$3\1])$4])
# b4_comment(TEXT, [PREFIX])
# --------------------------
# Put TEXT in comment. Prefix all the output lines with PREFIX.
m4_define([b4_comment],
[b4_comment_([$1], [$2/* ], [$2 ], [ */])])
# b4_dollar_dollar_(VALUE, FIELD, DEFAULT-FIELD)
# ----------------------------------------------
# If FIELD (or DEFAULT-FIELD) is non-null, return "VALUE.FIELD",
# otherwise just VALUE. Be sure to pass "(VALUE)" is VALUE is a
# pointer.
m4_define([b4_dollar_dollar_],
[b4_symbol_value([$1],
m4_if([$2], [[]],
[[$3]], [[$2]]))])
# b4_dollar_pushdef(VALUE-POINTER, DEFAULT-FIELD, LOCATION)
# b4_dollar_popdef
# ---------------------------------------------------------
# Define b4_dollar_dollar for VALUE and DEFAULT-FIELD,
# and b4_at_dollar for LOCATION.
m4_define([b4_dollar_pushdef],
[m4_pushdef([b4_dollar_dollar],
[b4_dollar_dollar_([$1], m4_dquote($][1), [$2])])dnl
m4_pushdef([b4_at_dollar], [$3])dnl
])
m4_define([b4_dollar_popdef],
[m4_popdef([b4_at_dollar])dnl
m4_popdef([b4_dollar_dollar])dnl
])
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