%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  This file is part of Logtalk <https://logtalk.org/>
%  SPDX-FileCopyrightText: 2010 Victor Lagerkvist
%  SPDX-License-Identifier: BSD-3-Clause
%
%  Redistribution and use in source and binary forms, with or without
%  modification, are permitted provided that the following conditions are met:
%
%  * Redistributions of source code must retain the above copyright notice, this
%    list of conditions and the following disclaimer.
%
%  * Redistributions in binary form must reproduce the above copyright notice,
%    this list of conditions and the following disclaimer in the documentation
%    and/or other materials provided with the distribution.
%
%  * Neither the name of the copyright holder nor the names of its
%    contributors may be used to endorse or promote products derived from
%    this software without specific prior written permission.
%
%  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
%  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
%  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
%  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
%  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
%  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
%  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
%  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
%  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
%  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


:- op(1000, xfy, and).


:- category(flatting).

	:- info([
		version is 1:1:0,
		author is 'Victor Lagerkvist',
		date is 2025-10-06,
		comment is 'Flattens conjunction of goals with the form f and g into a list [f,g].',
		source is 'Based on source code from The Craft of Prolog, by Richard O''Keefe.'
	]).

	:- protected(flatten_goals//1).
	:- mode_non_terminal(flatten_goals(+callable), one).
	:- info(flatten_goals//1, [
		comment is 'Flattens a conjunction of goals.',
		argnames is ['Conjunction']
	]).

	flatten_goals((G1 and G2)) -->
		!,
		flatten_goals(G1),
		flatten_goals(G2).
	flatten_goals(true) -->
		!,
		[].
	flatten_goals(G) -->
		[G].

:- end_category.
