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% -----------------------------------------------------------------------------
% (C) Altran Praxis Limited
% -----------------------------------------------------------------------------
%
% The SPARK toolset is free software; you can redistribute it and/or modify it
% under terms of the GNU General Public License as published by the Free
% Software Foundation; either version 3, or (at your option) any later
% version. The SPARK toolset 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 distributed with the SPARK toolset; see file
% COPYING3. If not, go to http://www.gnu.org/licenses for a complete copy of
% the license.
%
% =============================================================================
%###############################################################################
% PURPOSE
%-------------------------------------------------------------------------------
% Support to declare operator precedences and fixivity.
%###############################################################################
%###############################################################################
% MODULE
%###############################################################################
:- module(opdeclar,
[declare_operators/0,
hide_operators/0]).
%###############################################################################
% DEPENDENCIES
%###############################################################################
%###############################################################################
% TYPES
%###############################################################################
%###############################################################################
% DYNAMICS
%###############################################################################
%###############################################################################
% PREDICATES
%###############################################################################
%===============================================================================
% declare_operators.
%-------------------------------------------------------------------------------
% Declare operator precedence and fixivity as used by the spark tools.
%===============================================================================
declare_operators :-
%--------------------
op(350, xfx, ** ),
% INITIAL VALUE POSTFIX
op(350, xf, ~),
% Attributes
op(350, yfx, #),
%--------------------
%--------------------
op(375, fx, + ),
op(375, fx, - ),
%--------------------
%--------------------
op(400, yfx, * ),
op(400, yfx, / ),
op(400, yfx, div),
op(400, yfx, mod),
op(400, yfx, rem),
op(400, yfx, @ ),
op(400, yfx, /\ ),
%--------------------
%--------------------
op(500, yfx, + ),
op(500, yfx, - ),
op(500, yfx, \/ ),
op(500, yfx, \ ),
%--------------------
%--------------------
op(700, yfx, <> ),
op(700, yfx, <= ),
op(700, yfx, in ),
op(700, yfx, not_in ),
op(700, yfx, subset_of ),
op(700, yfx, strict_subset_of ),
% Signed 'is' and special case 'exp_iss' for ** operator
op(700, xfx, iss),
op(700, xfx, exp_iss),
% Arithmetic
op(700, yfx, less_than),
% Sets
op(700, fy, set),
%--------------------
%--------------------
op(900, fy, not ),
%--------------------
%--------------------
op(925, yfx, and ),
%--------------------
%--------------------
op(950, yfx, or ),
% Guesstimated precedence!
op(950, yfx, xor ),
%--------------------
%--------------------
op(975, yfx, -> ),
op(975, yfx, <-> ),
%--------------------
%--------------------
% for range notation
op(990, yfx, '..'),
% Used for "unit function"
op(990, fx, unit),
%--------------------
%--------------------
op(992, yfx, requires),
%--------------------
%--------------------
% Used in array aggregates
op(995, yfx, ':='),
%--------------------
%--------------------
% Used in array aggregates
op(997, yfx, &),
op(997, fx, rule_family),
%--------------------
%--------------------
op(998, yfx, may_be_deduced_from),
op(998, yfx, may_be_replaced_by),
op(998, xf, are_interchangeable),
op(998, yfx, if),
op(998, xf, may_be_deduced),
%--------------------
%--------------------
% Used in quantification
op(999, xfy, :),
%--------------------
!.
%===============================================================================
% hide_operators.
%-------------------------------------------------------------------------------
% After all dynamic predicates have been introduced, we need to disable
% "dynamic" as an operator in case a user has an fdl entity called
% "dynamic". Same goes for the other predefined prolog operators that might
% look like fdl identifiers. See the sicstus manual section "Standard
% Operators".
%===============================================================================
hide_operators:-
op(0, fx, mode),
op(0, fx, public),
op(0, fx, dynamic),
op(0, fx, multifile),
op(0, fx, volatile),
op(0, fx, block),
op(0, fx, meta_predicate),
op(0, fx, discontiguous),
op(0, fx, initialization),
op(0, fx, spy),
op(0, fx, nospy),
!.
%###############################################################################
% END-OF-FILE
|
