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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
%-------------------------------------------------------------------------------
% Provides support for processing rules after they have been loaded.
%###############################################################################
%###############################################################################
%MODULE
%###############################################################################
:- module(processrules, [do_rule_substitutions0/0]).
:- use_module('data__rules.pro').
:- use_module('newutilities.pro').
%###############################################################################
%DEPENDENCIES
%###############################################################################
%###############################################################################
%TYPES
%###############################################################################
%###############################################################################
%DATA
%###############################################################################
%###############################################################################
%PREDICATES
%###############################################################################
%===============================================================================
%do_rule_substitutions0.
%-------------------------------------------------------------------------------
% Seeks to apply the loaded rules to transform the loaded rules. The aim
% here is to eliminate constants in the rules up-front, to reduce the
% number of rule applications seen in rewriting the vcs.
%===============================================================================
do_rule_substitutions0 :-
scalar_replacement_rule(Name, X, Y),
apply_rule_to_existing_rules(Name, X, Y).
do_rule_substitutions0 :- !.
%-------------------------------------------------------------------------------
scalar_replacement_rule(Name, X, Y) :-
replace_rule(Name, X, Y),
atom(X),
user:int_enum_lit_or_const(Y, _T).
%-------------------------------------------------------------------------------
apply_rule_to_existing_rules(ApplyRuleName_Atom, ApplyLHS_Exp, ApplyRHS_Exp) :-
get_rule(TargetRuleFile_Atom,
TargetRuleName_Atom,
RuleSource,
Target_RuleHeuristic,
Target_RuleLogic,
TargetLHS_ExpList,
TargetRHS_ExpList,
TargetCondition_ExpList),
/* prevent self-application */
TargetRuleName_Atom\= ApplyRuleName_Atom,
user:subst_vbl_list(ApplyLHS_Exp, ApplyRHS_Exp, TargetLHS_ExpList, NewTargetLHS_ExpList),
user:subst_vbl_list(ApplyLHS_Exp, ApplyRHS_Exp, TargetRHS_ExpList, NewTargetRHS_ExpList),
user:subst_vbl_list(ApplyLHS_Exp, ApplyRHS_Exp, TargetCondition_ExpList, NewTargetCondition_ExpList),
/* so they do differ */
\+ (TargetLHS_ExpList == NewTargetLHS_ExpList,
TargetRHS_ExpList == NewTargetRHS_ExpList,
TargetCondition_ExpList == NewTargetCondition_ExpList),
prune_rule(TargetRuleFile_Atom,
TargetRuleName_Atom,
RuleSource,
Target_RuleHeuristic,
Target_RuleLogic,
TargetLHS_ExpList,
TargetRHS_ExpList,
TargetCondition_ExpList),
add_rule(TargetRuleFile_Atom,
TargetRuleName_Atom,
RuleSource,
Target_RuleHeuristic,
Target_RuleLogic,
NewTargetLHS_ExpList,
NewTargetRHS_ExpList,
NewTargetCondition_ExpList),
fail.
%###############################################################################
%END-OF-FILE
|
