570 lines
25 KiB
Prolog
570 lines
25 KiB
Prolog
%%% -*- Mode: Prolog; -*-
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% Flags was developed at Katholieke Universiteit Leuven
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%
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% Copyright 2010
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% Katholieke Universiteit Leuven
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%
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% Contributions to this file:
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% Author: Theofrastos Mantadelis
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% Sugestions: Bernd Gutmann, Paulo Moura
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% $Date: 2011-02-15 13:33:01 +0100 (Tue, 15 Feb 2011) $
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% $Revision: 15 $
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%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% Artistic License 2.0
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%
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% Copyright (c) 2000-2006, The Perl Foundation.
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%
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% Everyone is permitted to copy and distribute verbatim copies of this
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% license document, but changing it is not allowed. Preamble
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%
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% This license establishes the terms under which a given free software
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% Package may be copied, modified, distributed, and/or
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% redistributed. The intent is that the Copyright Holder maintains some
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% artistic control over the development of that Package while still
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% keeping the Package available as open source and free software.
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%
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% You are always permitted to make arrangements wholly outside of this
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% license directly with the Copyright Holder of a given Package. If the
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% terms of this license do not permit the full use that you propose to
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% make of the Package, you should contact the Copyright Holder and seek
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% a different licensing arrangement. Definitions
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%
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% "Copyright Holder" means the individual(s) or organization(s) named in
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% the copyright notice for the entire Package.
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%
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% "Contributor" means any party that has contributed code or other
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% material to the Package, in accordance with the Copyright Holder's
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% procedures.
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%
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% "You" and "your" means any person who would like to copy, distribute,
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% or modify the Package.
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%
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% "Package" means the collection of files distributed by the Copyright
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% Holder, and derivatives of that collection and/or of those files. A
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% given Package may consist of either the Standard Version, or a
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% Modified Version.
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%
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% "Distribute" means providing a copy of the Package or making it
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% accessible to anyone else, or in the case of a company or
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% organization, to others outside of your company or organization.
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%
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% "Distributor Fee" means any fee that you charge for Distributing this
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% Package or providing support for this Package to another party. It
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% does not mean licensing fees.
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%
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% "Standard Version" refers to the Package if it has not been modified,
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% or has been modified only in ways explicitly requested by the
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% Copyright Holder.
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%
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% "Modified Version" means the Package, if it has been changed, and such
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% changes were not explicitly requested by the Copyright Holder.
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%
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% "Original License" means this Artistic License as Distributed with the
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% Standard Version of the Package, in its current version or as it may
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% be modified by The Perl Foundation in the future.
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%
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% "Source" form means the source code, documentation source, and
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% configuration files for the Package.
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%
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% "Compiled" form means the compiled bytecode, object code, binary, or
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% any other form resulting from mechanical transformation or translation
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% of the Source form.
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%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% Permission for Use and Modification Without Distribution
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%
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% (1) You are permitted to use the Standard Version and create and use
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% Modified Versions for any purpose without restriction, provided that
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% you do not Distribute the Modified Version.
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%
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% Permissions for Redistribution of the Standard Version
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%
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% (2) You may Distribute verbatim copies of the Source form of the
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% Standard Version of this Package in any medium without restriction,
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% either gratis or for a Distributor Fee, provided that you duplicate
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% all of the original copyright notices and associated disclaimers. At
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% your discretion, such verbatim copies may or may not include a
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% Compiled form of the Package.
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%
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% (3) You may apply any bug fixes, portability changes, and other
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% modifications made available from the Copyright Holder. The resulting
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% Package will still be considered the Standard Version, and as such
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% will be subject to the Original License.
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%
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% Distribution of Modified Versions of the Package as Source
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%
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% (4) You may Distribute your Modified Version as Source (either gratis
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% or for a Distributor Fee, and with or without a Compiled form of the
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% Modified Version) provided that you clearly document how it differs
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% from the Standard Version, including, but not limited to, documenting
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% any non-standard features, executables, or modules, and provided that
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% you do at least ONE of the following:
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%
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% (a) make the Modified Version available to the Copyright Holder of the
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% Standard Version, under the Original License, so that the Copyright
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% Holder may include your modifications in the Standard Version. (b)
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% ensure that installation of your Modified Version does not prevent the
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% user installing or running the Standard Version. In addition, the
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% modified Version must bear a name that is different from the name of
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% the Standard Version. (c) allow anyone who receives a copy of the
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% Modified Version to make the Source form of the Modified Version
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% available to others under (i) the Original License or (ii) a license
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% that permits the licensee to freely copy, modify and redistribute the
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% Modified Version using the same licensing terms that apply to the copy
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% that the licensee received, and requires that the Source form of the
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% Modified Version, and of any works derived from it, be made freely
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% available in that license fees are prohibited but Distributor Fees are
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% allowed.
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%
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% Distribution of Compiled Forms of the Standard Version or
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% Modified Versions without the Source
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%
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% (5) You may Distribute Compiled forms of the Standard Version without
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% the Source, provided that you include complete instructions on how to
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% get the Source of the Standard Version. Such instructions must be
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% valid at the time of your distribution. If these instructions, at any
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% time while you are carrying out such distribution, become invalid, you
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% must provide new instructions on demand or cease further
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% distribution. If you provide valid instructions or cease distribution
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% within thirty days after you become aware that the instructions are
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% invalid, then you do not forfeit any of your rights under this
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% license.
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%
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% (6) You may Distribute a Modified Version in Compiled form without the
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% Source, provided that you comply with Section 4 with respect to the
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% Source of the Modified Version.
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%
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% Aggregating or Linking the Package
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%
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% (7) You may aggregate the Package (either the Standard Version or
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% Modified Version) with other packages and Distribute the resulting
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% aggregation provided that you do not charge a licensing fee for the
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% Package. Distributor Fees are permitted, and licensing fees for other
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% components in the aggregation are permitted. The terms of this license
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% apply to the use and Distribution of the Standard or Modified Versions
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% as included in the aggregation.
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%
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% (8) You are permitted to link Modified and Standard Versions with
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% other works, to embed the Package in a larger work of your own, or to
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% build stand-alone binary or bytecode versions of applications that
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% include the Package, and Distribute the result without restriction,
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% provided the result does not expose a direct interface to the Package.
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% Items That are Not Considered Part of a Modified Version
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%
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% (9) Works (including, but not limited to, modules and scripts) that
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% merely extend or make use of the Package, do not, by themselves, cause
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% the Package to be a Modified Version. In addition, such works are not
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% considered parts of the Package itself, and are not subject to the
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% terms of this license.
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%
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% General Provisions
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%
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% (10) Any use, modification, and distribution of the Standard or
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% Modified Versions is governed by this Artistic License. By using,
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% modifying or distributing the Package, you accept this license. Do not
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% use, modify, or distribute the Package, if you do not accept this
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% license.
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%
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% (11) If your Modified Version has been derived from a Modified Version
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% made by someone other than you, you are nevertheless required to
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% ensure that your Modified Version complies with the requirements of
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% this license.
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%
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% (12) This license does not grant you the right to use any trademark,
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% service mark, tradename, or logo of the Copyright Holder.
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%
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% (13) This license includes the non-exclusive, worldwide,
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% free-of-charge patent license to make, have made, use, offer to sell,
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% sell, import and otherwise transfer the Package with respect to any
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% patent claims licensable by the Copyright Holder that are necessarily
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% infringed by the Package. If you institute patent litigation
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% (including a cross-claim or counterclaim) against any party alleging
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% that the Package constitutes direct or contributory patent
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% infringement, then this Artistic License to you shall terminate on the
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% date that such litigation is filed.
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%
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% (14) Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT
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% HOLDER AND CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED
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% WARRANTIES. THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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% PARTICULAR PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED TO THE EXTENT
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% PERMITTED BY YOUR LOCAL LAW. UNLESS REQUIRED BY LAW, NO COPYRIGHT
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% HOLDER OR CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT, INDIRECT,
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% INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT OF THE USE
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% OF THE PACKAGE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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:- module(flags, [flag_define/2,
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flag_define/5,
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flag_define/7,
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flag_set/2,
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flag_set/3,
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flag_unsafe_set/2,
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flag_get/2,
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flags_reset/0,
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flags_reset/1,
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flags_save/1,
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flags_load/1,
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flag_groups/1,
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flag_group_chk/1,
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flag_help/0,
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flags_print/0,
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defined_flag/7]).
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:- use_module(library(lists), [append/3, memberchk/2, member/2]).
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:- style_check(all).
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:- yap_flag(unknown, error).
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:- dynamic(['$defined_flag$'/7, '$store_flag_value$'/2]).
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:- meta_predicate(flag_define(+, +, +, ?, ?, ?, :)).
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:- meta_predicate(flag_define(+, :)).
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:- meta_predicate(validate(+, :, ?, +)).
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:- multifile(flags_type_definition/3).
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flag_define(FlagName, InputOptions):-
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strip_module(InputOptions, Module, UserOptions),
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Defaults = [flag_group(general), flag_type(nonvar), default_value(true), description(FlagName), access(read_write), handler(true)],
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append(UserOptions, Defaults, Options),
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memberchk(flag_group(FlagGroup), Options),
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memberchk(flag_type(FlagType), Options),
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memberchk(default_value(DefaultValue), Options),
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memberchk(description(Description), Options),
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memberchk(access(Access), Options),
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memberchk(handler(Handler), Options),
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flag_define(FlagName, FlagGroup, FlagType, DefaultValue, Description, Access, Module:Handler).
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flag_define(FlagName, FlagGroup, FlagType, DefaultValue, Description):-
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flag_define(FlagName, FlagGroup, FlagType, DefaultValue, Description, read_write, true).
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flag_define(FlagName, FlagGroup, FlagType, DefaultValue, Description, Access, MHandler):-
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strip_module(MHandler, Module, Handler),
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nonvar(FlagName),
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nonvar(FlagGroup),
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nonvar(FlagType),
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nonvar(Access),
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nonvar(Handler), !,
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(\+ atom(FlagName) ->
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throw(error(type_error(atom, FlagName), message('Flag name needs to be an atom.', flag_define(FlagName, FlagGroup, FlagType, DefaultValue, Description, Access, Module:Handler))))
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; \+ atom(FlagGroup) ->
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throw(error(type_error(atom, FlagGroup), message('Flag group needs to be an atom.', flag_define(FlagName, FlagGroup, FlagType, DefaultValue, Description, Access, Module:Handler))))
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; \+ flag_type(FlagType) ->
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throw(error(domain_error(flag_type, FlagType), message('Unknown flag type.', flag_define(FlagName, FlagGroup, FlagType, DefaultValue, Description, Module:Handler))))
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; \+ validate_type(FlagType) ->
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throw(error(evaluation_error(type_validation), message('Validation of flag type failed, check custom domain.', flag_define(FlagName, FlagGroup, FlagType, DefaultValue, Description, Access, Module:Handler))))
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; '$defined_flag$'(FlagName, _FlagGroup, _FlagType, _DefaultValue, _Description, _Access, _Handler) ->
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throw(error(permission_error(create, flag, FlagName), message('Re-defining a flag is not allowed.', flag_define(FlagName, FlagGroup, FlagType, DefaultValue, Description, Access, Module:Handler))))
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; \+ memberchk(Access, [read_write, read_only, hidden, hidden_read_only]),
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throw(error(domain_error(access, Access), message('Wrong access attribute, available are: read_write, read_only, hidden, hidden_read_only.', flag_define(FlagName, FlagGroup, FlagType, DefaultValue, Description, Access, Module:Handler))))
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; \+ callable(Handler) -> % the Handler comes from: strip_module(MHandler, Module, Handler)
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throw(error(type_error(callable, Handler), message('Flag handler needs to be callable.', flag_define(FlagName, FlagGroup, FlagType, DefaultValue, Description, Access, Module:Handler))))
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;
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validate(FlagType, Module:Handler, DefaultValue, FlagName),
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assertz('$defined_flag$'(FlagName, FlagGroup, FlagType, DefaultValue, Description, Access, Module:Handler)),
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assertz('$store_flag_value$'(FlagName, DefaultValue)),
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(Handler == true ->
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true
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;
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call(Module:Handler, stored, DefaultValue)
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)
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).
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flag_define(FlagName, FlagGroup, FlagType, DefaultValue, Description, Access, Handler):-
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throw(error(instantiation_error, message('Flag name, group, type, access and handler need to be instantiated.', flag_define(FlagName, FlagGroup, FlagType, DefaultValue, Description, Access, Handler)))).
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flag_groups(FlagGroups):-
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all(FlagGroup, ('$defined_flag$'(_FlagName, FlagGroup, _FlagType, _DefaultValue, _Description, Access, _Handler), Access \== hidden, Access \== hidden_read_only), FlagGroups).
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flag_group_chk(FlagGroup):-
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nonvar(FlagGroup),
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'$defined_flag$'(_FlagName, FlagGroup, _FlagType, _DefaultValue, _Description, _Access, _Handler), !.
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flag_type(Type):-
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flags_type_definition(Type, _, _).
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% flags_type_definition(TypeName, TypeHandler, TypeValidator).
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flags_type_definition(nonvar, nonvar, true).
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flags_type_definition(atom, atom, true).
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flags_type_definition(atomic, atomic, true).
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flags_type_definition(integer, integer, true).
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flags_type_definition(float, float, true).
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flags_type_definition(number, number, true).
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flags_type_definition(ground, ground, true).
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flags_type_definition(compound, compound, true).
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flags_type_definition(is_list, is_list, true).
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flags_type_definition(callable, callable, true).
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flags_type_definition(in_interval(Type, Interval), in_interval(Type, Interval), in_interval(Type, Interval)).
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flags_type_definition(integer_in_interval(Interval), in_interval(integer, Interval), in_interval(integer, Interval)).
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flags_type_definition(positive_integer, in_interval(integer, (0, (+inf))), true).
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flags_type_definition(non_negative_integer, in_interval(integer, ([0], (+inf))), true).
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flags_type_definition(negative_integer, in_interval(integer, ((-inf), 0)), true).
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flags_type_definition(float_in_interval(Interval), in_interval(float, Interval), in_interval(float, Interval)).
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flags_type_definition(positive_float, in_interval(float, (0.0, (+inf))), true).
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flags_type_definition(non_negative_float, in_interval(float, ([0.0], (+inf))), true).
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flags_type_definition(negative_float, in_interval(float, ((-inf), 0.0)), true).
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flags_type_definition(number_in_interval(Interval), in_interval(number, Interval), in_interval(number, Interval)).
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flags_type_definition(positive_number, in_interval(number, (0.0, (+inf))), true).
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flags_type_definition(non_negative_number, in_interval(number, ([0.0], (+inf))), true).
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flags_type_definition(negative_number, in_interval(number, ((-inf), 0.0)), true).
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flags_type_definition(in_domain(Domain), in_domain(Domain), in_domain(Domain)).
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flags_type_definition(boolean, in_domain([true, false]), true).
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flags_type_definition(switch, in_domain([on, off]), true).
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in_domain(Domain):-
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ground(Domain),
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is_list(Domain).
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in_domain(Domain, Value):-
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ground(Value),
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memberchk(Value, Domain).
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in_interval(Type, Interval):-
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is_list(Interval), !,
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Interval \== [],
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in_interval_conj(Type, Interval).
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in_interval(Type, Interval):-
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in_interval_single(Type, Interval).
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in_interval_conj(_Type, []).
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in_interval_conj(Type, [Interval|Rest]):-
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in_interval_single(Type, Interval),
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in_interval_conj(Type, Rest).
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in_interval_single(Type, ([Min], [Max])):-
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!, call(Type, Min),
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call(Type, Max),
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Min =< Max.
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in_interval_single(Type, ([Min], Max)):-
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!, call(Type, Min),
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type_or_inf(Type, Max),
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Min < Max.
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in_interval_single(Type, (Min, [Max])):-
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!, type_or_inf(Type, Min),
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call(Type, Max),
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Min < Max.
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in_interval_single(Type, (Min, Max)):-
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type_or_inf(Type, Min),
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type_or_inf(Type, Max),
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Min < Max,
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Max - Min > 0.0.
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type_or_inf(Type, Value):-
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nonvar(Type), nonvar(Value),
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Value == (+inf), !.
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type_or_inf(Type, Value):-
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nonvar(Type), nonvar(Value),
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Value == (-inf), !.
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type_or_inf(Type, Value):- call(Type, Value).
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in_interval(Type, [Interval|_Rest], Value):-
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in_interval(Type, Interval, Value), !.
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in_interval(Type, [_Interval|Rest], Value):-
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in_interval(Type, Rest, Value).
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in_interval(Type, ([Min], [Max]), Value):-
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!, call(Type, Value),
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Value >= Min,
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Value =< Max.
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in_interval(Type, ([Min], Max), Value):-
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!, call(Type, Value),
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Value >= Min,
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Value < Max.
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in_interval(Type, (Min, [Max]), Value):-
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!, call(Type, Value),
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Value > Min,
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Value =< Max.
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in_interval(Type, (Min, Max), Value):-
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call(Type, Value),
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Value > Min,
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Value < Max.
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validate_type(Type):-
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flags_type_definition(Type, _, TypeValidater),
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call(TypeValidater).
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validate(FlagType, Handler, Value, FlagName):-
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strip_module(Handler, _Module, true),
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!, flags_type_definition(FlagType, FlagValidator, _),
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(call(FlagValidator, Value) ->
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true
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;
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throw(error(validation_error(FlagType, Value), message('Validation of value fails.', validate(FlagType, Value, FlagName))))
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).
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validate(FlagType, Handler, Value, FlagName):-
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flags_type_definition(FlagType, FlagValidator, _),
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((call(Handler, validating, Value), (call(FlagValidator, Value); call(Handler, validate, Value))) ->
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call(Handler, validated, Value)
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;
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throw(error(validation_error(FlagType, Value), message('Validation of value fails.', validate(FlagType, Handler, Value, FlagName))))
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).
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flag_set(FlagName, FlagValue):-
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flag_set(FlagName, _OldValue, FlagValue).
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flag_set(FlagName, OldValue, FlagValue):-
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atom(FlagName),
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'$defined_flag$'(FlagName, _FlagGroup, FlagType, _DefaultValue, _Description, Access, Module:Handler), !,
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(Access \== read_only, Access \== hidden_read_only ->
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validate(FlagType, Module:Handler, FlagValue, FlagName),
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retract('$store_flag_value$'(FlagName, OldValue)),
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assertz('$store_flag_value$'(FlagName, FlagValue)),
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(Handler == true ->
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true
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;
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call(Module:Handler, stored, FlagValue)
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)
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;
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throw(error(permission_error(set, flag, FlagName), message('Setting the flag value is not allowed.',flag_set(FlagName, OldValue, FlagValue))))
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).
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flag_set(FlagName, OldValue, FlagValue):-
|
|
throw(error(existence_error(flag, FlagName), message('The flag is not defined.', flag_set(FlagName, OldValue, FlagValue)))).
|
|
|
|
flag_unsafe_set(FlagName, FlagValue):-
|
|
retract('$store_flag_value$'(FlagName, _)),
|
|
assertz('$store_flag_value$'(FlagName, FlagValue)).
|
|
|
|
flag_get(FlagName, FlagValue):-
|
|
\+ '$store_flag_value$'(FlagName, _),
|
|
throw(error(existence_error(flag, FlagName), message('The flag is not defined.', flag_get(FlagName, FlagValue)))).
|
|
flag_get(FlagName, FlagValue):-
|
|
'$store_flag_value$'(FlagName, FlagValue).
|
|
|
|
flags_reset:-
|
|
retractall('$store_flag_value$'(_, _)),
|
|
'$defined_flag$'(FlagName, _FlagGroup, _FlagType, DefaultValue, _Description, _Access, Module:Handler),
|
|
assertz('$store_flag_value$'(FlagName, DefaultValue)),
|
|
(Handler == true ->
|
|
true
|
|
;
|
|
call(Module:Handler, stored, DefaultValue)
|
|
),
|
|
fail.
|
|
flags_reset.
|
|
|
|
flags_reset(FlagGroup):-
|
|
'$defined_flag$'(FlagName, FlagGroup, _FlagType, DefaultValue, _Description, _Access, Module:Handler),
|
|
retractall('$store_flag_value$'(FlagName, _)),
|
|
assertz('$store_flag_value$'(FlagName, DefaultValue)),
|
|
(Handler == true ->
|
|
true
|
|
;
|
|
call(Module:Handler, stored, DefaultValue)
|
|
),
|
|
fail.
|
|
flags_reset(_).
|
|
|
|
flags_save(FileName):-
|
|
tell(FileName),
|
|
catch(('$store_flag_value$'(FlagName, Value),
|
|
write_canonical('$store_flag_value$'(FlagName, Value)),
|
|
write('.'), nl),
|
|
Exception, clean_and_throw(told, Exception)),
|
|
fail.
|
|
flags_save(_FileName):-
|
|
told.
|
|
|
|
flags_load(FileName):-
|
|
see(FileName),
|
|
catch((read('$store_flag_value$'(FlagName, Value)),
|
|
flag_set(FlagName, Value)),
|
|
Exception, clean_and_throw(seen, Exception)),
|
|
fail.
|
|
flags_load(_FileName):-
|
|
seen.
|
|
|
|
clean_and_throw(Action, Exception):-
|
|
Action,
|
|
throw(Exception).
|
|
|
|
flag_help:-
|
|
format('This is a short tutorial for the flags library.~nExported predicates:~n'),
|
|
format(' flag_define/5 : defines a new flag without a handler~n'),
|
|
format(' flag_define(FlagName, FlagGroup, FlagType, DefaultValue, Description)~n'),
|
|
format(' flag_define/6 : defines a new flag with a handler~n'),
|
|
format(' flag_define(FlagName, FlagGroup, FlagType, DefaultValue, Description, Handler)~n'),
|
|
format(' FlagName : the name of the flag~n'),
|
|
format(' FlagGroup : the name of the flag group~n'),
|
|
format(' FlagType : the type of the flag available types are:~n'),
|
|
flag_help_types,
|
|
format(' DefaultValue : the default value for the flag~n'),
|
|
format(' Description : a flag description~n'),
|
|
format(' Handler : a handler~n'),
|
|
flags:flag_help_handler,
|
|
format(' flag_groups/1 : returns all the flag groups in a list~n'),
|
|
format(' flag_group_chk/1 : checks if a group exists~n'),
|
|
format(' flag_set/2 : sets the value of a flag~n'),
|
|
format(' flag_get/2 : gets the value of a flag~n'),
|
|
format(' flag_store/2 : sets the value of a flag ignoring all tests and handlers~n'),
|
|
format(' flag_reset/0 : resets all flags to their default value~n'),
|
|
format(' flag_reset/1 : resets all flags of a group to their default value~n'),
|
|
format(' flag_help/0 : this screen~n'),
|
|
format(' flags_print/0 : shows the current flags/values~n').
|
|
flag_help_types:-
|
|
flag_type(FlagType),
|
|
format(' ~w~n', [FlagType]),
|
|
fail.
|
|
flag_help_types.
|
|
|
|
flag_help_handler:-
|
|
format(' Handler important notes:~n'),
|
|
format(' Conjuction: external_handler(validating, Value):-...~n'),
|
|
format(' Disjunction: external_handler(validate, Value):-...~n'),
|
|
format(' After: external_handler(validated, Value):-...~n'),
|
|
format(' After set: external_handler(stored, Value):-...~n'),
|
|
format(' this is implemented as (validating,(original;validated))~n'),
|
|
format(' validating|original|validate|result~n'),
|
|
format(' true | true | true | true~n'),
|
|
format(' true | true | fail | true~n'),
|
|
format(' true | fail | true | true~n'),
|
|
format(' true | fail | fail | fail~n'),
|
|
format(' fail | true | true | fail~n'),
|
|
format(' fail | true | fail | fail~n'),
|
|
format(' fail | fail | true | fail~n'),
|
|
format(' fail | fail | fail | fail~n'),
|
|
format(' Default behaviour is validating->true, validate->fail~n'),
|
|
format(' To completly replace original set validate->true~n'),
|
|
format(' To add new values to original set validating->true~n'),
|
|
format(' To remove values from original set validate->fail~n'),
|
|
format(' Example definition with a handler:~n'),
|
|
format(' flag_define(myflag, mygroup, in_interval(integer, [(-5, 5),([15],[25])]), 0, description, my_handler).~n'),
|
|
format(' my_handler(validate, Value):-Value is 10.~n'),
|
|
format(' my_handler(validating, Value).~n'),
|
|
format(' my_handler(validated, Value).~n'),
|
|
format(' my_handler(stored, Value).~n'),
|
|
format(' This has defined a flag that accepts integers (-5,5)v[15,25].~n'),
|
|
format(' The handler adds the value 10 in those.~n').
|
|
|
|
flags_print:-
|
|
flag_groups(Groups),
|
|
forall(member(Group, Groups), flags_print(Group)).
|
|
flags_print(Group):-
|
|
format(' ~w:~n~w~38+ ~w~19+ ~w~10+ ~w~10+~n', [Group, 'Description', 'Domain', 'Flag', 'Value']),
|
|
fail.
|
|
flags_print(FlagGroup):-
|
|
'$defined_flag$'(FlagName, FlagGroup, FlagType, _DefaultValue, Description, Access, _Handler),
|
|
Access \== hidden, Access \== hidden_read_only,
|
|
flag_get(FlagName, Value),
|
|
format('~w~38+ ~w~19+ ~w~10+ ~q~10+~n', [Description, FlagType, FlagName, Value]),
|
|
fail.
|
|
flags_print(_).
|
|
|
|
defined_flag(FlagName, FlagGroup, FlagType, DefaultValue, Description, Access, Handler):-
|
|
'$defined_flag$'(FlagName, FlagGroup, FlagType, DefaultValue, Description, Access, Handler),
|
|
Access \== hidden, Access \== hidden_read_only.
|
|
defined_flag(FlagName, FlagGroup, FlagType, DefaultValue, Description, Access, Handler):-
|
|
nonvar(FlagName), nonvar(FlagGroup),
|
|
'$defined_flag$'(FlagName, FlagGroup, FlagType, DefaultValue, Description, Access, Handler).
|
|
|
|
|