-*- Autoconf -*-

# Common code for C-like languages (C, C++, Java, etc.)

# Copyright (C) 2012-2015 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/>.

# 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

])