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metta_eval.pl
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metta_eval.pl
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/*
* Project: MeTTaLog - A MeTTa to Prolog Transpiler/Interpreter
* Description: This file is part of the source code for a transpiler designed to convert
* MeTTa language programs into Prolog, utilizing the SWI-Prolog compiler for
* optimizing and transforming function/logic programs. It handles different
* logical constructs and performs conversions between functions and predicates.
*
* Author: Douglas R. Miles
* Contact: [email protected] / [email protected]
* License: LGPL
* Repository: https://github.com/trueagi-io/metta-wam
* https://github.com/logicmoo/hyperon-wam
* Created Date: 8/23/2023
* Last Modified: $LastChangedDate$ # You will replace this with Git automation
*
* Usage: This file is a part of the transpiler that transforms MeTTa programs into Prolog. For details
* on how to contribute or use this project, please refer to the repository README or the project documentation.
*
* Contribution: Contributions are welcome! For contributing guidelines, please check the CONTRIBUTING.md
* file in the repository.
*
* Notes:
* - Ensure you have SWI-Prolog installed and properly configured to use this transpiler.
* - This project is under active development, and we welcome feedback and contributions.
*
* Acknowledgments: Special thanks to all contributors and the open source community for their support and contributions.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 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 OWNER 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.
*/
% When the the `metta_interp` library is loaded, it makes sure the rest of the files are intially loaded in
% the correct order independent of which file is loaded first the needed predicates and ops are defined.
:- ensure_loaded(metta_interp).
% post match modew
%:- style_check(-singleton).
:- multifile(fake_notrace/1).
:- meta_predicate(fake_notrace(0)).
:- meta_predicate(color_g_mesg(+,0)).
:- multifile(color_g_mesg/2).
self_eval0(X):- \+ callable(X),!.
self_eval0(X):- py_is_py(X),!.
%self_eval0(X):- py_type(X,List), List\==list,!.
self_eval0(X):- is_valid_nb_state(X),!.
%self_eval0(X):- string(X),!.
%self_eval0(X):- number(X),!.
%self_eval0([]).
self_eval0(X):- is_metta_declaration(X),!.
self_eval0([_,Ar,_]):- (Ar=='-->';Ar=='<->';Ar=='<--'),!.
self_eval0([F|X]):- !, is_list(X),length(X,Len),!,nonvar(F), is_self_eval_l_fa(F,Len),!.
self_eval0(X):- typed_list(X,_,_),!.
%self_eval0(X):- compound(X),!.
%self_eval0(X):- is_ref(X),!,fail.
self_eval0('True'). self_eval0('False'). % self_eval0('F').
self_eval0('Empty').
self_eval0([]).
self_eval0('%Undefined%').
self_eval0(X):- atom(X),!, \+ nb_bound(X,_),!.
nb_bound(Name,X):- atom(Name), % atom_concat('&', _, Name),
nb_current(Name, X), compound(X). % spaces and states are stored as compounds
coerce(Type,Value,Result):- nonvar(Value),Value=[Echo|EValue], Echo == echo, EValue = [RValue],!,coerce(Type,RValue,Result).
coerce(Type,Value,Result):- var(Type), !, Value=Result, freeze(Type,coerce(Type,Value,Result)).
coerce('Atom',Value,Result):- !, Value=Result.
coerce('Bool',Value,Result):- var(Value), !, Value=Result, freeze(Value,coerce('Bool',Value,Result)).
coerce('Bool',Value,Result):- Value=0, !, Result='False'.
coerce('Bool',Value,Result):- Value='False', !, Result='False'.
coerce('Bool',Value,Result):- is_list(Value), length(Value, 0), !, Result='False'.
coerce('Bool',Value,Result):- is_list(Value),!,as_tf(call_true(Value),Result),
set_list_value(Value,Result).
coerce('Bool',Value,Result):- !, Result='True'.
coerce('Number',Value,Result):- number(Value), !, Value=Result.
coerce('Number',Value,Result):- string(Value), !, number_string(Result, Value).
coerce('Number',Value,Result):- Value='False', !, Result=0.
coerce('Number',Value,Result):- Value='True', !, Result=1.
coerce('Number',Value,Result):- atom(Value), !, atom_number(Value, Result).
coerce('String', Value, Result):- term_string(Value,Result).
set_list_value(Value,Result):- nb_setarg(1,Value,echo),nb_setarg(1,Value,[Result]).
%is_self_eval_l_fa('S',1). % cheat to comment
% these should get uncomented with a flag
%is_self_eval_l_fa(':',2).
% is_self_eval_l_fa('=',2).
% eval_20(Eq,RetType,Depth,Self,['quote',Eval],RetVal):- !, Eval = RetVal, check_returnval(Eq,RetType,RetVal).
is_self_eval_l_fa('quote',_).
is_self_eval_l_fa('Error',_).
is_self_eval_l_fa('{...}',_).
is_self_eval_l_fa('[...]',_).
self_eval(X):- notrace(self_eval0(X)).
:- set_prolog_flag(access_level,system).
hyde(F/A):- functor(P,F,A), redefine_system_predicate(P),'$hide'(F/A), '$iso'(F/A).
:- 'hyde'(option_else/2).
:- 'hyde'(atom/1).
:- 'hyde'(quietly/1).
%:- 'hyde'(fake_notrace/1).
:- 'hyde'(var/1).
:- 'hyde'(is_list/1).
:- 'hyde'(copy_term/2).
:- 'hyde'(nonvar/1).
:- 'hyde'(quietly/1).
%:- 'hyde'(option_value/2).
is_metta_declaration([F|_]):- F == '->',!.
is_metta_declaration([F,H,_|T]):- T ==[], is_metta_declaration_f(F,H).
is_metta_declaration_f(F,H):- F == ':<', !, nonvar(H).
is_metta_declaration_f(F,H):- F == ':>', !, nonvar(H).
is_metta_declaration_f(F,H):- F == '=', !, is_list(H), \+ (current_self(Space), is_user_defined_head_f(Space,F)).
% is_metta_declaration([F|T]):- is_list(T), is_user_defined_head([F]),!.
% Sets the current self space to '&self'. This is likely used to track the current context or scope during the evaluation of Metta code.
:- nb_setval(self_space, '&self').
%current_self(Space):- nb_current(self_space,Space).
do_expander('=',_,X,X):-!.
do_expander(':',_,X,Y):- !, get_type(X,Y)*->X=Y.
get_type(Arg,Type):- eval_H(['get-type',Arg],Type).
%! eval_true(+X) is semidet.
% Evaluates the given term X and succeeds if X is not a constraint (i.e. \+ iz_conz(X)) and is callable, and calling X succeeds.
%
% If X is not callable, this predicate will attempt to evaluate the arguments of X (using eval_args/2) and succeed if the result is not False.
eval_true(X):- \+ iz_conz(X), callable(X), call(X).
eval_true(X):- eval_args(X,Y), once(var(Y) ; \+ is_False(Y)).
eval(Depth,Self,X,Y):- eval('=',_,Depth,Self,X,Y).
eval(Eq,RetType,Depth,Self,X,Y):-
catch_metta_return(eval_args(Eq,RetType,Depth,Self,X,Y),Y).
%:- set_prolog_flag(gc,false).
/*
eval_args(Eq,RetTyp e,Depth,Self,X,Y):-
locally(set_prolog_flag(gc,true),
rtrace_on_existence_error(
eval(Eq,RetType,Depth,Self,X,Y))).
*/
%! eval_args(+X,-Y) is semidet.
eval_args(X,Y):- current_self(Self), eval_args(500,Self,X,Y).
%eval_args(Eq,RetType,Depth,_Self,X,_Y):- forall(between(6,Depth,_),write(' ')),writeqln(eval_args(Eq,RetType,X)),fail.
eval_args(Depth,Self,X,Y):- eval_args('=',_RetType,Depth,Self,X,Y).
%! eval_to(+X,+Y) is semidet.
% checks if X evals to Y
evals_to(XX,Y):- Y=@=XX,!.
evals_to(XX,Y):- Y=='True',!, is_True(XX),!.
eval_args(_Eq,_RetType,_Dpth,_Slf,X,Y):- var(X),nonvar(Y),!,X=Y.
eval_args(_Eq,_RetType,_Dpth,_Slf,X,Y):- notrace(self_eval(X)),!,Y=X.
eval_args(Eq,RetType,Depth,Self,X,Y):-
notrace(nonvar(Y)), var(RetType),
% super safety checks is optional code that can be ran .. normally this is done with assertion/1 but unfortionately assertion/1 is not guarenteed to keep bindings (THUS WOULDNT HAVE WORED HERE) and can be said to be wrapped in `once/1`
super_safety_checks(copy_term(Y,YC)),
get_type(Depth,Self,Y,WasType),
super_safety_checks(must_det_ll(Y=@=YC)),
can_assign(WasType,RetType),
nonvar(RetType),!,
eval_args(Eq,RetType,Depth,Self,X,Y).
eval_args(Eq,RetType,Depth,Self,X,Y):- notrace(nonvar(Y)),!,
eval_args(Eq,RetType,Depth,Self,X,XX),evals_to(XX,Y).
eval_args(Eq,RetType,_Dpth,_Slf,[X|T],Y):- T==[], number(X),!, do_expander(Eq,RetType,X,YY),Y=[YY].
/*
eval_args(Eq,RetType,Depth,Self,[F|X],Y):-
(F=='superpose' ; ( option_value(no_repeats,false))),
notrace((D1 is Depth-1)),!,
eval_args(Eq,RetType,D1,Self,[F|X],Y).
*/
eval_args(Eq,RetType,Depth,Self,X,Y):- atom(Eq), ( Eq \== ('='), Eq \== ('match')) ,!,
call(call,Eq,'=',RetType,Depth,Self,X,Y).
eval_args(_Eq,_RetType,_Dpth,_Slf,X,Y):- self_eval(X),!,Y=X.
eval_args(Eq,RetType,Depth,Self,X,Y):-
eval_00(Eq,RetType,Depth,Self,X,Y).
%eval_ret(Eq,RetType,1000,Self,X,Y):- !,
% catch_metta_return(eval_ret(Eq,RetType,99,Self,X,Y),Y).
eval_ret(Eq,RetType,Depth,Self,X,Y):-
eval_00(Eq,RetType,Depth,Self,X,Y), is_returned(Y).
catch_metta_return(G,Y):-
catch(G,metta_return(Y),ignore(retract(thrown_metta_return(Y)))).
allow_repeats_eval_(_):- !.
allow_repeats_eval_(_):- option_value(no_repeats,false),!.
allow_repeats_eval_(X):- \+ is_list(X),!,fail.
allow_repeats_eval_([F|_]):- atom(F),allow_repeats_eval_f(F).
allow_repeats_eval_f('superpose').
allow_repeats_eval_f('collapse').
:- nodebug(metta(overflow)).
eval_00(_Eq,_RetType,_Depth,_Slf,X,Y):- self_eval(X),!,X=Y.
eval_00(Eq,RetType,Depth,Self,X,YO):-
eval_01(Eq,RetType,Depth,Self,X,YO).
eval_01(Eq,RetType,Depth,Self,X,YO):-
X\==[empty], % speed up n-queens x60
if_t((Depth<1, trace_on_overflow),
debug(metta(eval_args))),
notrace((Depth2 is Depth-1, copy_term(X, XX))),
trace_eval(eval_20(Eq,RetType),e,Depth2,Self,X,M),
(self_eval(M)-> YO=M ;
(((M=@=XX)-> Y=M
;eval_01(Eq,RetType,Depth2,Self,M,Y)),
eval_02(Eq,RetType,Depth2,Self,Y,YO))).
eval_02(Eq,RetType,Depth2,Self,Y,YO):- Y\==[empty], % speed up n-queens x60
once(if_or_else((subst_args_here(Eq,RetType,Depth2,Self,Y,YO)),
if_or_else((fail,finish_eval(Eq,RetType,Depth2,Self,Y,YO)),
Y=YO))).
% subst_args_here(Eq,RetType,Depth2,Self,Y,YO):-
% Y =@= [ house, _59198,_59204,==,fish,fish],!,break.
% % this needs to test itself for when it can be skipped
% % uncommented causes 7% failure but a 10x speedup
% subst_args_here(Eq,RetType,Depth2,Self,Y,YO):- Y=YO.
% % this next one at least causes no failures and 5x speedup
subst_args_here(Eq,RetType,Depth2,Self,Y,YO):- wont_need_subst(Y),!, Y=YO.
subst_args_here(Eq,RetType,Depth2,Self,Y,YO):-
subst_args(Eq,RetType,Depth2,Self,Y,YO),
notrace(if_t_else((wont_need_subst(Y),Y\=@=YO),
(write_src_uo(needed_subst_args(Y,YO)),bt,sleep(1.0)),
nop(write_src_uo(unneeded_subst_args(Y))))).
wont_need_subst([_,A|_]):- number(A),!,fail.
wont_need_subst([F|_]):-atom(F), \+ need_subst_f(F).
need_subst_f('==').
% ['Mortal','Socrates'] -> 'T'
need_subst_f('Mortal').
need_subst_f('*'). need_subst_f('+').
need_subst_f('-'). need_subst_f('/').
need_subst_f('<'). need_subst_f('=<').
if_t_else(If,Then,Else):- If -> Then ; Else.
finish_eval_here(Eq,RetType,Depth2,Self,Y,YO):-
finish_eval(Eq,RetType,Depth2,Self,Y,YO),
notrace(if_t(Y\=@=YO,write_src_uo(finish_eval(Y,YO)))).
:- nodebug(metta(e)).
:- discontiguous eval_20/6.
:- discontiguous eval_40/6.
:- discontiguous eval_70/6.
%:- discontiguous eval_30fz/5.
%:- discontiguous eval_31/5.
%:- discontiguous eval_maybe_defn/5.
eval_20(Eq,RetType,_Dpth,_Slf,Name,Y):-
atom(Name), !,
(nb_bound(Name,X)->do_expander(Eq,RetType,X,Y);
Y = Name).
eval_20(Eq,RetType,_Dpth,_Slf,X,Y):- no_eval(X),!,do_expander(Eq,RetType,X,Y).
args_not_evaled(X):- ( \+ is_list(X); maplist(no_eval,X)),!.
no_eval(X):- self_eval(X),!.
no_eval([SL|X]):- atomic(SL), !, is_sl(SL), args_not_evaled(X).
no_eval([SL|X]):- ( \+ atom(SL), \+ is_list(SL)), !,
args_not_evaled(X).
is_sl(N):- number(N).
is_sl('ExtSet').
is_sl('IntSet').
%is_sl('___').
% =================================================================
% =================================================================
% =================================================================
% VAR HEADS/ NON-LISTS
% =================================================================
% =================================================================
% =================================================================
eval_20(Eq,RetType,_Dpth,_Slf,[X|T],Y):- T==[], \+ callable(X),!, do_expander(Eq,RetType,X,YY),Y=[YY].
%eval_20(Eq,RetType,_Dpth,Self,[X|T],Y):- T==[], atom(X),
% \+ is_user_defined_head_f(Self,X),
% do_expander(Eq,RetType,X,YY),!,Y=[YY].
eval_20(Eq,RetType,Depth,Self,X,Y):- atom(Eq), ( Eq \== ('=')) ,!,
call(Eq,'=',RetType,Depth,Self,X,Y).
eval_20(Eq,RetType,Depth,Self,[F,[Eval,V]|VI],VO):- Eval == eval,!,
((eval_args(Eq,_FRype,Depth,Self,V,VV), V\=@=VV)*-> true; VV = V),
eval_args(Eq,RetType,Depth,Self,[F,VV|VI],VO).
eval_20(Eq,RetType,Depth,Self,[[Eval,V]|VI],VO):- Eval == eval,!,
((eval_args(Eq,_FRype,Depth,Self,V,VV), V\=@=VV)*-> true; VV = V),
eval_args(Eq,RetType,Depth,Self,[VV|VI],VO).
% DMILES @ TODO make sure this isnt an implicit curry
eval_20(Eq,_RetType,Depth,Self,[V|VI],VO):- \+ callable(V), is_list(VI),!,
maplist(eval_ret(Eq,_ArgRetType,Depth,Self),[V|VI],VOO),VO=VOO.
eval_20(Eq,RetType,Depth,Self,[X|T],[Y]):- T==[], is_list(X),!,
eval_args(Eq,RetType,Depth,Self,X,Y).
eval_20(Eq,RetType,Depth,Self,[X|Rest],YL):- is_list(Rest), is_list(X),!,
eval_args(Eq,RetType,Depth,Self,X,Y),
((X\=@=Y,atom(Y)) -> eval_args(Eq,RetType,Depth,Self,[Y|Rest],YL)
; ((maplist(eval_args(Eq,RetType,Depth,Self),Rest,YRest),YL=[Y|YRest]))).
eval_20(Eq,RetType,Depth,Self,[V|VI],VVO):- \+ is_list(VI),!,
eval_args(Eq,RetType,Depth,Self,VI,VM),
( VM\==VI -> eval_args(Eq,RetType,Depth,Self,[V|VM],VVO) ;
(eval_args(Eq,RetType,Depth,Self,V,VV), (V\==VV -> eval_args(Eq,RetType,Depth,Self,[VV|VI],VVO) ; VVO = [V|VI]))).
eval_20(Eq,RetType,_Dpth,_Slf,X,Y):- \+ is_list(X),!,do_expander(Eq,RetType,X,Y).
eval_20(Eq,_RetType,Depth,Self,[V|VI],[V|VO]):- var(V),is_list(VI),!,maplist(eval_args(Eq,_ArgRetType,Depth,Self),VI,VO).
eval_20(_,_,_,_,['echo',Value],Value):- !.
eval_20(=,Type,_,_,['coerce',Type,Value],Result):- !, coerce(Type,Value,Result).
% =================================================================
% =================================================================
% =================================================================
% LET*
% =================================================================
% =================================================================
% =================================================================
%eval_20(Eq,RetType,Depth2,Self,[Qw,X,Y],YO):- Qw == ('=='),!,
% eval_args(X,XX),eval_args(Y,YY), !, as_tf(XX==YY,YO).
eval_20(Eq,RetType,Depth,Self,['let*',Lets,Body],RetVal):-
expand_let_star(Lets,Body,NewLet),!,
eval_20(Eq,RetType,Depth,Self,NewLet,RetVal).
expand_let_star(Lets,Body,Body):- Lets==[],!.
expand_let_star([H|LetRest],Body,['let',V,E,NewBody]):-
is_list(H), H = [V,E], !,
expand_let_star(LetRest,Body,NewBody).
eval_20(Eq,RetType,Depth,Self,X,RetVal):-
once(expand_eval(X,XX)),X\==XX,!,
%fbug(expand_eval(X,XX)),
eval_20(Eq,RetType,Depth,Self,XX,RetVal).
expand_eval(X,Y):- \+ is_list(X),!, X=Y.
expand_eval([H|A],[H|AA]):- \+ ground(H),!,maplist(expand_eval,A,AA).
expand_eval(['let*',Lets,Body],NewBody):- expand_let_star(Lets,Body,NewBody),!.
expand_eval([H|A],[H|AA]):- maplist(expand_eval,A,AA).
% =================================================================
% =================================================================
% =================================================================
% EVAL LAZY
% =================================================================
% =================================================================
% =================================================================
is_progn(C):- var(C),!,fail.
is_progn('chain-body').
is_progn('progn').
eval_20(Eq,RetType,Depth,Self,[Comma,X ],Res):- is_progn(Comma),!, eval_args(Eq,RetType,Depth,Self,X,Res).
%eval_20(Eq,RetType,Depth,Self,[Comma,X,Y],Res):- is_progn(Comma),!, eval_args(Eq,_,Depth,Self,X,_),
% eval_args(Eq,RetType,Depth,Self,Y,Res).
eval_20(Eq,RetType,Depth,Self,[Comma,X|Y],Res):- is_progn(Comma),!, eval_args(Eq,_,Depth,Self,X,_),
eval_args(Eq,RetType,Depth,Self,[Comma|Y],Res).
eval_20(Eq,RetType,Depth,Self,['chain',Atom,Var|Y],Res):- !, eval_args(Eq,_RetType,Depth,Self,Atom,R),
Var = R, eval_args(Eq,RetType,Depth,Self,['chain-body'|Y],Res).
%eval_20(Eq,RetType,Depth,Self,['chain-body',X],Res):- !,eval_args(Eq,RetType,Depth,Self,X,Res).
%eval_20(Eq,RetType,Depth,Self,['chain-body',X|Y],Res):- !, eval_args(Eq,RetType,Depth,Self,X,_), eval_args(Eq,RetType,Depth,Self,['chain-body'|Y],Res).
% simple version of Minimal MeTTa's `evalc` function
eval_20(Eq,RetType,Depth,Self,['evalc',Eval,Other],Result):-!,
into_space(Depth,Self,Other,Space),
eval_args_once(Eq,RetType,Depth,Space,Eval,Result).
% @TODO needs to only reduce one steps
eval_args_once(Eq,RetType,Depth,Space,Eval,Result):-
eval_20(Eq,RetType,Depth,Space,Eval,Result)*->true;(Eval=Result).
eval_20(Eq,RetType,Depth,Self,['eval',X],Res):- !,
eval_args(Eq,RetType,Depth,Self,X, Res).
eval_20(Eq,RetType,Depth,Self,['eval-for',Type,X],Res):- !,
ignore(Type=RetType),
eval_args(Eq,Type,Depth,Self,X, Res).
eval_20(Eq,RetType,Depth,Self,['eval-for',_Why,Type,X],Res):- !,
ignore(Type=RetType),
eval_args(Eq,Type,Depth,Self,X, Res).
% simple version of Minimal MeTTa's `metta` function (we dont call evalc/2 as it will be corrected to only reduce once)
eval_20(Eq,_Maybe_TODO_RetType,Depth,Self,['metta',Eval,RetType,Other],Result):-!,
into_space(Depth,Self,Other,Space),
eval_args(Eq,RetType,Depth,Space,Eval,Result),
filter_type(Result,RetType).
filter_type(Result,RetType):-
get_type(Result, ResultType),
type_conform(ResultType, RetType),!.
/* Function takes list of atoms (first argument), variable (second argument) and filter predicate (third argument) and returns list with items which passed filter.
E.g. (filter-atom (1 2 3 4) $v (eval (> $v 2))) will give (3 4)") */
eval_20(Eq,RetType,Depth,Self,['filter-atom',List,Var,Pred],Res):- !,
call_filter_atom(Eq,RetType,Depth,Self,List,Var,Pred,Res).
call_filter_atom(_Eq,_RetType,_Depth,_Self,[],_Var,_Pred1,[]):-!.
call_filter_atom(Eq,RetType,Depth,Self,[E|List],Var,Pred,Out):-
(( \+ \+ (E = Var, eval_args_true(Eq,RetType,Depth,Self,Pred))) -> Out = [E|Res] ; Out = Res),
call_filter_atom(Eq,RetType,Depth,Self,List,Var,Pred,Res).
% "Function takes list of atoms (first argument), variable to be used inside (second variable) and an expression which will be evaluated for each atom in list (third argument). Expression should contain variable. So e.g. (map-atom (1 2 3 4) $v (eval (+ $v 1))) will give (2 3 4 5)"
eval_20(Eq,RetType,Depth,Self,['map-atom',List,V,Eval],Res):- !,
call_map_atom(Eq,RetType,Depth,Self,List,V,Eval,Res).
call_map_atom(Eq,RetType,Depth,Self,[E|List],V,Eval,[CR|Res]):- !, faster_replace(V,E,Eval,CEval),
eval_args(Eq,RetType,Depth,Self,CEval,CR),
call_map_atom(Eq,RetType,Depth,Self,List,V,Eval,Res).
call_map_atom(_Eq,_RetType,_Depth,_Self,[],_V,_Pred,[]):-!.
% which is faster?
%faster_replace(B,E,Eval,CEval):- subst0011a(B,E,Eva2,CEval).
faster_replace(B,E,Eval,CEval):- copy_term(B+Eval,CB+CEval), E = CB.
%faster_replace(A,Init,B,E,Eval,CEval):- copy_term(A+B+Eval,CA+CB+CEval), CA = Init, CB = E.
% Function takes list of values (first argument), initial value (second argument) and operation (fifth argument) and applies it consequently to the list of values, using init value as a start. It also takes two variables (third and fourth argument) to use them inside
eval_20(Eq,RetType,Depth,Self,['foldl-atom',List,Init,A,B,Eval],Res):- !,
call_foldl_atom(Eq,RetType,Depth,Self,List,Init,A,B,Eval,Res).
% Last Cail
call_foldl_atom(Eq,RetType,Depth,Self,[E],Init,A,B,Eval,Res):- !, A = Init, B = E,
eval_args(Eq,RetType,Depth,Self,Eval,Res).
% Recursive Cail
call_foldl_atom(Eq,RetType,Depth,Self,[E|List],Init,A,B,Eval,Res):- !, faster_replace(A,Init,B,E,Eval,CEval),
eval_args(Eq,RetType,Depth,Self,CEval,CR),
call_foldl_atom(Eq,RetType,Depth,Self,List,CR,A,B,Eval,Res).
% Empty List
call_foldl_atom(_Eq,_RetType,_Depth,_Self,[],Init,_A,_B,_Eval,Init):-!.
% which is faster?
faster_replace(A,Init,B,E,Eval,CEval):- subst0011a(A,Init,Eval,Eva2), subst0011a(B,E,Eva2,CEval).
%faster_replace(A,Init,B,E,Eval,CEval):- copy_term(A+B+Eval,CA+CB+CEval), CA = Init, CB = E.
% =================================================================
% =================================================================
% =================================================================
% LET
% =================================================================
% =================================================================
% =================================================================
unified(X,Y):- X=@=Y,X=Y,!.
unified(X,Y):- X=Y,!.
unified(X,Y):- eval(X,XX),X\=@=XX,unified(Y,XX).
unified(X,Y):- eval(Y,YY),Y\=@=YY,unified(YY,X).
eval_until_unify(_Eq,_RetType,_Dpth,_Slf,X,X):- !.
eval_until_unify(Eq,RetType,Depth,Self,X,Y):- eval_until_eq(Eq,RetType,Depth,Self,X,Y),!.
eval_until_eq(_Eq,_RetType,_Dpth,_Slf,X,Y):- catch_nowarn(X=:=Y),!.
eval_until_eq(_Eq,_RetType,_Dpth,_Slf,X,Y):- catch_nowarn('#='(X,Y)),!.
eval_until_eq(Eq,RetType,_Dpth,_Slf,X,Y):- X=Y,check_returnval(Eq,RetType,Y).
%eval_until_eq(Eq,RetType,Depth,Self,X,Y):- var(Y),!,eval_in_steps_or_same(Eq,RetType,Depth,Self,X,XX),Y=XX.
%eval_until_eq(Eq,RetType,Depth,Self,Y,X):- var(Y),!,eval_in_steps_or_same(Eq,RetType,Depth,Self,X,XX),Y=XX.
eval_until_eq(Eq,RetType,Depth,Self,X,Y):- \+is_list(Y),!,eval_in_steps_some_change(Eq,RetType,Depth,Self,X,XX),Y=XX.
eval_until_eq(Eq,RetType,Depth,Self,Y,X):- \+is_list(Y),!,eval_in_steps_some_change(Eq,RetType,Depth,Self,X,XX),Y=XX.
eval_until_eq(Eq,RetType,Depth,Self,X,Y):- eval_in_steps_some_change(Eq,RetType,Depth,Self,X,XX),eval_until_eq(Eq,RetType,Depth,Self,Y,XX).
eval_until_eq(_Eq,_RetType,_Dpth,_Slf,X,Y):- length(X,Len), \+ length(Y,Len),!,fail.
eval_until_eq(Eq,RetType,Depth,Self,X,Y):- nth1(N,X,EX,RX), nth1(N,Y,EY,RY),
EX=EY,!, maplist(eval_until_eq(Eq,RetType,Depth,Self),RX,RY).
eval_until_eq(Eq,RetType,Depth,Self,X,Y):- nth1(N,X,EX,RX), nth1(N,Y,EY,RY),
((var(EX);var(EY)),eval_until_eq(Eq,RetType,Depth,Self,EX,EY)),
maplist(eval_until_eq(Eq,RetType,Depth,Self),RX,RY).
eval_until_eq(Eq,RetType,Depth,Self,X,Y):- nth1(N,X,EX,RX), nth1(N,Y,EY,RY),
h((is_list(EX);is_list(EY)),eval_until_eq(Eq,RetType,Depth,Self,EX,EY)),
maplist(eval_until_eq(Eq,RetType,Depth,Self),RX,RY).
eval_1change(Eq,RetType,Depth,Self,EX,EXX):-
eval_20(Eq,RetType,Depth,Self,EX,EXX), EX \=@= EXX.
eval_complete_change(Eq,RetType,Depth,Self,EX,EXX):-
eval_args(Eq,RetType,Depth,Self,EX,EXX), EX \=@= EXX.
eval_in_steps_some_change(_Eq,_RetType,_Dpth,_Slf,EX,_):- \+ is_list(EX),!,fail.
eval_in_steps_some_change(Eq,RetType,Depth,Self,EX,EXX):- eval_1change(Eq,RetType,Depth,Self,EX,EXX).
eval_in_steps_some_change(Eq,RetType,Depth,Self,X,Y):- append(L,[EX|R],X),is_list(EX),
eval_in_steps_some_change(Eq,RetType,Depth,Self,EX,EXX), EX\=@=EXX,
append(L,[EXX|R],XX),eval_in_steps_or_same(Eq,RetType,Depth,Self,XX,Y).
eval_in_steps_or_same(Eq,RetType,Depth,Self,X,Y):-eval_in_steps_some_change(Eq,RetType,Depth,Self,X,Y).
eval_in_steps_or_same(Eq,RetType,_Dpth,_Slf,X,Y):- X=Y,check_returnval(Eq,RetType,Y).
% (fail,make_nop(RetType,[],Template))).
possible_type(_Self,_Var,_RetTypeV).
eval_20(Eq,RetType,Depth,Self,['let',E,V,Body],OO):- var(V), nonvar(E), !,
%(var(V)->true;trace),
possible_type(Self,V,RetTypeV),
eval_args(Eq,RetTypeV,Depth,Self,E,ER), V=ER,
eval_args(Eq,RetType,Depth,Self,Body,OO).
eval_20(Eq,RetType,Depth,Self,['let',V,E,Body],OO):- !, % var(V), nonvar(E), !,
%(var(V)->true;trace),
possible_type(Self,V,RetTypeV),
eval_args(Eq,RetTypeV,Depth,Self,E,ER), V=ER,
eval_args(Eq,RetType,Depth,Self,Body,OO).
/*
eval_20(Eq,RetType,Depth,Self,['let',V,E,Body],OO):- nonvar(V),nonvar(E),!,
possible_type(Self,V,RetTypeV),
possible_type(Self,E,RetTypeV),
((V=E,fail) -> true;
(eval_args(Eq,RetTypeV,Depth,Self,E,ER),
(V=ER -> true;
(eval_args(Eq,RetTypeV,Depth,Self,V,VR),
(E=VR -> true; ER=VR))))),
eval_args(Eq,RetType,Depth,Self,Body,OO).
eval_20(Eq,RetType,Depth,Self,['let',V,E,Body],OO):- var(V), nonvar(E), !,
%(var(V)->true;trace),
possible_type(Self,V,RetTypeV),
eval_args(Eq,RetTypeV,Depth,Self,E,ER), V=ER,
eval_args(Eq,RetType,Depth,Self,Body,OO).
eval_20(Eq,RetType,Depth,Self,['let',V,E,Body],OO):- var(V), var(E), !,
V=E, eval_args(Eq,RetType,Depth,Self,Body,OO).
%eval_20(Eq,RetType,Depth,Self,['let',V,E,Body],BodyO):- !,eval_args(Eq,RetType,Depth,Self,E,V),eval_args(Eq,RetType,Depth,Self,Body,BodyO).
eval_20(Eq,RetType,Depth,Self,['let*',[],Body],RetVal):- !, eval_args(Eq,RetType,Depth,Self,Body,RetVal).
%eval_20(Eq,RetType,Depth,Self,['let*',[[Var,Val]|LetRest],Body],RetVal):- !,
% eval_until_unify(Eq,_RetTypeV,Depth,Self,Val,Var),
% eval_20(Eq,RetType,Depth,Self,['let*',LetRest,Body],RetVal).
eval_20(Eq,RetType,Depth,Self,['let*',[[Var,Val]|LetRest],Body],RetVal):- !,
eval_20(Eq,RetType,Depth,Self,['let',Var,Val,['let*',LetRest,Body]],RetVal).
*/
% =================================================================
% =================================================================
% =================================================================
% TRACE/PRINT
% =================================================================
% =================================================================
% =================================================================
eval_20(Eq,RetType,_Dpth,_Slf,['repl!'],Y):- !, repl,check_returnval(Eq,RetType,Y).
%eval_20(Eq,RetType,Depth,Self,['enforce',Cond],Res):- !, enforce_true(Eq,RetType,Depth,Self,Cond,Res).
eval_20(Eq,RetType,Depth,Self,['!',Cond],Res):- !, call(eval_args(Eq,RetType,Depth,Self,Cond,Res)).
eval_20(Eq,RetType,Depth,Self,['rtrace!',Cond],Res):- !, rtrace(eval_args(Eq,RetType,Depth,Self,Cond,Res)).
eval_20(Eq,RetType,Depth,Self,['no-rtrace!',Cond],Res):- !, quietly(eval_args(Eq,RetType,Depth,Self,Cond,Res)).
eval_20(Eq,RetType,Depth,Self,['trace!',A,B],C):- !, % writeln(trace(A)),
stream_property(S,file_no(2)),!,
eval_args(Eq,RetType,Depth,Self,B,C),
ignore((eval_args(Eq,_RetType,Depth,Self,A,AA),
with_output_to(S,(format('~N'), write_src(AA),format('~N'))))).
eval_20(Eq,RetType,Depth,Self,['trace',Cond],Res):- !, with_debug(eval_args,eval_args(Eq,RetType,Depth,Self,Cond,Res)).
eval_20(Eq,RetType,Depth,Self,['profile!',Cond],Res):- !, time_eval(profile(Cond),profile(eval_args(Eq,RetType,Depth,Self,Cond,Res))).
eval_20(Eq,RetType,Depth,Self,['cpu-time',Cond],Res):- !, ctime_eval(eval_args(Cond),eval_args(Eq,RetType,Depth,Self,Cond,Res)).
eval_20(Eq,RetType,Depth,Self,['wall-time',Cond],Res):- !, wtime_eval(eval_args(Cond),eval_args(Eq,RetType,Depth,Self,Cond,Res)).
eval_20(Eq,RetType,Depth,Self,['time',Cond],Res):- !, wtime_eval(eval_args(Cond),eval_args(Eq,RetType,Depth,Self,Cond,Res)).
eval_20(Eq,RetType,Depth,Self,['print',Cond],Res):- !, eval_args(Eq,RetType,Depth,Self,Cond,Res),format('~N'),print(Res),format('~N').
% !(print! $1)
eval_20(Eq,RetType,Depth,Self,['princ!'|Cond],Res):- !,
maplist(eval_args(Eq,RetType,Depth,Self),Cond,Out),
maplist(princ_impl,Out),
make_nop(RetType,[],Res),check_returnval(Eq,RetType,Res).
% !(println! $1)
eval_20(Eq,RetType,Depth,Self,['println!'|Cond],Res):- !,
maplist(eval_args(Eq,RetType,Depth,Self),Cond,Out),
maplist(println_impl,Out),
make_nop(RetType,[],Res),check_returnval(Eq,RetType,Res).
println_impl(X):- format("~N~@~N",[write_sln(X)]),!,flush_output.
%println_impl(X):- user_io((ansi_format(fg('#c7ea46'),"~N~@~N",[write_sln(X)]))),flush_output.
%println_impl(X):- ((ansi_format(fg('#c7ea46'),"~N~@~N",[write_sln(X)]))),flush_output.
princ_impl(X):- format("~@",[write_sln(X)]),!,flush_output.
write_sln(X):- string(X), !, write(X),flush_output.
write_sln(X):- write_src_woi(X),flush_output.
with_output_to_str( Sxx , Goal ):-
wots( Sxx , Goal ).
% =================================================================
% =================================================================
% =================================================================
% UNIT TESTING/assert<STAR>
% =================================================================
% =================================================================
% =================================================================
eval_20(Eq,RetType,Depth,Self,['assertTrue', X],TF):- !,
eval_20(Eq,RetType,Depth,Self,['assertEqual',X,'True'],TF).
eval_20(Eq,RetType,Depth,Self,['assertFalse',X],TF):- !,
eval_20(Eq,RetType,Depth,Self,['assertEqual',X,'False'],TF).
eval_20(Eq,_RetType,Depth,Self,['assertEqual',X,Y],RetVal):- !,
loonit_assert_source_tf_empty(
['assertEqual',X,Y],XX,YY,
(findall_eval(Eq,_ARetType,Depth,Self,X,XX),
findall_eval(Eq,_BRetType,Depth,Self,Y,YY)),
equal_enough_for_test(XX,YY), RetVal).
eval_20(Eq,_RetType,Depth,Self,['assertNotEqual',X,Y],RetVal):- !,
loonit_assert_source_tf_empty(
['assertNotEqual',X,Y],XX,YY,
(findall_eval(Eq,_ARetType,Depth,Self,X,XX),
findall_eval(Eq,_BRetType,Depth,Self,Y,YY)),
( \+ equal_enough(XX,YY)), RetVal).
eval_20(Eq,_RetType,Depth,Self,['assertEqualToResult',X,Y],RetVal):- !,
loonit_assert_source_tf_empty(
['assertEqualToResult',X,Y],XX,YY,
(findall_eval(Eq,_ARetType,Depth,Self,X,XX),
=(Y,YY)),
equal_enough_for_test(XX,YY), RetVal).
loonit_assert_source_tf_empty(Src,XX,YY,Goal,Check,RetVal):-
loonit_assert_source_tf(Src,Goal,Check,TF),
tf_to_empty(TF,['Error'(got(XX),expected(YY))],RetVal).
tf_to_empty(TF,Else,RetVal):-
(TF=='True'->as_nop(RetVal);RetVal=Else).
val_sort(Y,YY):- is_list(Y),!,sort(Y,YY).
val_sort(Y,[Y]).
loonit_assert_source_tf(_Src,Goal,Check,TF):- fail, \+ is_testing,!,
reset_eval_num,
tst_call_limited(Goal),
as_tf(Check,TF),!.
loonit_assert_source_tf(Src,Goal,Check,TF):-
copy_term(Goal,OrigGoal),
reset_eval_num,
call_cleanup(loonit_asserts(Src, time_eval('\n; EVAL TEST\n;',Goal), Check),
(as_tf(notrace(Check),TF),!,
ignore((
once((TF='True', trace_on_pass);(TF='False', trace_on_fail)),
with_debug((eval_args),time_eval('Trace',OrigGoal)))))).
sort_result(Res,Res):- \+ compound(Res),!.
sort_result([And|Res1],Res):- is_and(And),!,sort_result(Res1,Res).
sort_result([T,And|Res1],Res):- is_and(And),!,sort_result([T|Res1],Res).
sort_result([H|T],[HH|TT]):- !, sort_result(H,HH),sort_result(T,TT).
sort_result(Res,Res).
unify_case(A,B):- A=@=B,!,A=B.
unify_case(A,B):- A=B,!.
unify_enough(L,L).
unify_enough(L,C):- into_list_args(L,LL),into_list_args(C,CC),unify_lists(CC,LL).
%unify_lists(C,L):- \+ compound(C),!,L=C.
%unify_lists(L,C):- \+ compound(C),!,L=C.
unify_lists(L,L):-!.
unify_lists([C|CC],[L|LL]):- unify_enough(L,C),!,unify_lists(CC,LL).
is_blank(X):- var(X),!,fail.
is_blank(E):- is_empty(E),!.
is_blank([]).
is_blank([X]):-!,is_blank(X).
has_let_star(Y):- sub_var('let*',Y).
sort_univ(L,S):- cl_list_to_set(L,E),sort(E,S).
% !(pragma! unit-tests tollerant) ; tollerant or exact
is_tollerant:- \+ option_value('unit-tests','exact').
equal_enough_for_test(X,Y):- X==Y,!.
equal_enough_for_test(X,Y):- X=@=Y,!.
equal_enough_for_test(X,Y):- is_list(X),is_list(Y),sort(X,X0),sort(Y,Y0),
Y0=[YY],X0=[XX],!,equal_enough_for_test(XX,YY).
equal_enough_for_test(X,Y):- is_list(X),is_list(Y),X=[ErrorX|_],Y=[ErrorY|_],ErrorX=='Error',
ErrorY == ErrorX,!.
equal_enough_for_test(X,Y):- is_blank(X),!,is_blank(Y).
equal_enough_for_test(X,Y):- has_let_star(Y),!,\+ is_blank(X).
equal_enough_for_test(X,Y):- is_list(X),is_list(Y),
Y=[YY],X=[XX],!,equal_enough_for_test(XX,YY).
%length(XX,XL),length(YY,YL),
%equal_enough_for_test(X,Y):-!,fail.
equal_enough_for_test(X,Y):- must_det_ll((subst_vars(X,XX),subst_vars(Y,YY))),!,
equal_enough_for_test2(XX,YY),!.
equal_enough_for_test2(X,Y):- equal_enough(X,Y).
equal_enough(R,V):- is_list(R),is_list(V),sort_univ(R,RR),sort_univ(V,VV),!,equal_enouf(RR,VV),!.
equal_enough(R,V):- copy_term(R,RR),copy_term(V,VV),equal_enouf(R,V),!,R=@=RR,V=@=VV. % has not altered the term
equal_enouf(R,V):- is_ftVar(R), is_ftVar(V), R=V,!.
equal_enouf(X,Y):- is_blank(X),!,is_blank(Y).
equal_enouf(R,V):- py_is_py(R),py_is_py(V),py_pp_str(R,RR),py_pp_str(V,VV),!,RR=VV.
equal_enouf(X,Y):- symbol(X),symbol(Y),atom_concat('&',_,X),atom_concat('Grounding',_,Y).
equal_enouf(R,V):- R=@=V, R=V, !.
equal_enouf(_,V):- V=@='...',!.
equal_enouf(L,C):- is_tollerant, is_list(L),is_list(C),
maybe_remove_nils(C,CC),equal_enouf(L,CC).
equal_enouf(L,C):- is_list(L),into_list_args(C,CC),!,equal_enouf_l(CC,L).
equal_enouf(C,L):- is_list(L),into_list_args(C,CC),!,equal_enouf_l(CC,L).
%equal_enouf(R,V):- (var(R),var(V)),!, R=V.
equal_enouf(R,V):- (var(R);var(V)),!, R==V.
equal_enouf(R,V):- number(R),number(V),!, RV is abs(R-V), RV < 0.03 .
equal_enouf(R,V):- atom(R),!,atom(V), has_unicode(R),has_unicode(V).
equal_enouf(R,V):- (\+ compound(R) ; \+ compound(V)),!, R==V.
equal_enouf(L,C):- into_list_args(L,LL),into_list_args(C,CC),!,equal_enouf_l(CC,LL).
equal_enouf_l([S1,V1|_],[S2,V2|_]):- S1 == 'State',S2 == 'State',!, equal_enouf(V1,V2).
equal_enouf_l(C,L):- \+ compound(C),!,L=@=C.
equal_enouf_l(L,C):- \+ compound(C),!,L=@=C.
equal_enouf_l([C|CC],[L|LL]):- !, equal_enouf(L,C),!,equal_enouf_l(CC,LL).
maybe_remove_nils(I,O):- always_remove_nils(I,O),!,I\=@=O.
always_remove_nils(I,O):- \+ compound(I),!,I=O.
always_remove_nils([H|T], TT):- H==[],!, always_remove_nils(T,TT).
always_remove_nils([H|T], TT):- H=='Empty',!, always_remove_nils(T,TT).
always_remove_nils([H|T],[H|TT]):- always_remove_nils(T,TT).
has_unicode(A):- atom_codes(A,Cs),member(N,Cs),N>127,!.
set_last_error(_).
% =================================================================
% =================================================================
% =================================================================
% SCOPING
% =================================================================
% =================================================================
% =================================================================
eval_20(_Eq, _RetType, _Depth, _Self, ['sealed', InputVarList, Expr], Result) :- !,
omit_atoms(InputVarList,OutputVarList),
check_replace_with_local_var(OutputVarList, Expr, Result).
% omit_atoms(+input variables, -variables less atoms)
% If there are already bound values passed to sealed, no need for replacement
omit_atoms([], []).
omit_atoms([Head|Tail], Result) :-
atomic(Head),
!,
omit_atoms(Tail, Result).
omit_atoms([Head|Tail], [Head|Result]) :-
omit_atoms(Tail, Result).
% check_replace_with_local_var(+Sealed-Variables, +Expression, -NewExpression)
% Boundary case -- no remaining variables to process, just return expression.
check_replace_with_local_var([], Expr, Result) :-
Result = Expr.
% General case -- replace sealed variable with a new variable
check_replace_with_local_var([VarHead|VarTail], Expr, Result) :-
% '_' gives us a prolog variable
replace_by_value(VarHead,Replacement),
subst_same(Expr, VarHead, Replacement, NewExpr),
check_replace_with_local_var(VarTail, NewExpr, Result).
% change the variable into an new anonymous one (but copy attributes)
replace_by_value(Var,Replacement):- var(Var),!,copy_term(Var,Replacement).
% creates a deep copy that allows caller to destructively change it
replace_by_value(Var,Replacement):- duplicate_term(Var,Replacement).
%! subst_same(+Term, +OldTerm, +NewTerm, -ResultTerm) is det.
%
% Recursively substitutes occurrences of OldTerm with NewTerm within a Prolog term (Term),
% producing a new term (ResultTerm). This predicate handles both simple and compound terms, including lists.
% Note: Matching is done with the SWI same_term predicate which states that terms are equal if the
% condition "the same variable, equivalent atomic data or a compound term allocated at the same address"
% If the current term (Term) exactly matches OldTerm (with above criteria).
subst_same(Term, OldTerm, NewTerm, NewTerm) :-
same_term(OldTerm, Term),
!.
% If the current term is not a compound term (like an atom, number or the wrong variable) it stays the same
subst_same(Term, _, _, Term) :- \+ compound(Term), !.
% If the current term is a list, it processes each element of the list recursively.
subst_same([Old|Structure], OldTerm, NewTerm, [New|StructureO]) :- !,
subst_same(Old, OldTerm, NewTerm, New),
subst_same(Structure, OldTerm, NewTerm, StructureO).
% Compound Terms are decomposed and reconstructed with the possibly modified arguments.
subst_same(OldStructure, OldTerm, NewTerm, NewStructure) :-
OldStructure =.. [Functor|Args],
subst_same(Args, OldTerm, NewTerm, NewArgs),
NewStructure =.. [Functor|NewArgs].
% =================================================================
% =================================================================
% =================================================================
% SPACE EDITING
% =================================================================
% =================================================================
% =================================================================
eval_20(Eq,RetType,_Dpth,_Slf,['new-space'],Space):- !, 'new-space'(Space),check_returnval(Eq,RetType,Space).
eval_20(Eq,RetType,Depth,Self,[Op,Space|Args],Res):- is_space_op(Op),!,
eval_space_start(Eq,RetType,Depth,Self,[Op,Space|Args],Res).
eval_20(Eq,RetType,Depth,Self,['unify',Space|Args],Res):- !,
eval_space_start(Eq,RetType,Depth,Self,['match',Space|Args],Res).
eval_space_start(Eq,RetType,_Depth,_Self,[_Op,_Other,Atom],Res):-
(Atom == [] ; Atom =='Empty'; Atom =='Nil'),!,make_nop(RetType,'False',Res),check_returnval(Eq,RetType,Res).
eval_space_start(Eq,RetType,Depth,Self,[Op,Other|Args],Res):-
into_space(Depth,Self,Other,Space),
eval_space(Eq,RetType,Depth,Self,[Op,Space|Args],Res).
eval_space(Eq,RetType,_Dpth,_Slf,['add-atom',Space,PredDecl],Res):- !,
do_metta(python,load,Space,PredDecl,TF),make_nop(RetType,TF,Res),check_returnval(Eq,RetType,Res).
eval_space(Eq,RetType,_Dpth,_Slf,['remove-atom',Space,PredDecl],Res):- !,
do_metta(python,unload_all,Space,PredDecl,TF),
make_nop(RetType,TF,Res),check_returnval(Eq,RetType,Res).
eval_space(Eq,RetType,_Dpth,_Slf,['atom-count',Space],Count):- !,
ignore(RetType='Number'),ignore(Eq='='),
'atom-count'(Space, Count).
%findall(Atom, metta_atom(Space, Atom),Atoms),
%length(Atoms,Count).
eval_space(Eq,RetType,_Dpth,_Slf,['atom-replace',Space,Rem,Add],TF):- !,
copy_term(Rem,RCopy), as_tf((metta_atom_iter_ref(Space,RCopy,Ref), RCopy=@=Rem,erase(Ref), do_metta(Space,load,Add)),TF),
check_returnval(Eq,RetType,TF).
eval_space(Eq,RetType,_Dpth,_Slf,['get-atoms',Space],Atom):- !,
ignore(RetType='Atom'),
get_metta_atom_from(Space, Atom),
check_returnval(Eq,RetType,Atom).
% Match-ELSE
eval_space(Eq,RetType,Depth,Self,['match',Other,Goal,Template,Else],Template):- !,
((eval_space(Eq,RetType,Depth,Self,['match',Other,Goal,Template],Template),
\+ make_nop(RetType,[],Template))*->true;Template=Else).
% Match-TEMPLATE
eval_space(Eq,_RetType,Depth,Self,['match',Other,Goal,Template],Template):-!,
metta_atom_iter(Eq,Depth,Self,Other,Goal).
/*
eval_space(Eq,RetType,Depth,Self,['match',Other,Goal,Template],Res):- !,
metta_atom_iter(Eq,Depth,Self,Other,Goal),
eval_args(Eq,RetType,Depth,Self,Template,Res).
*/
%metta_atom_iter(Eq,_Depth,_Slf,Other,[Equal,[F|H],B]):- Eq == Equal,!, % trace,
% metta_eq_def(Eq,Other,[F|H],B).
/*
metta_atom_iter(Eq,Depth,Self,Other,[Equal,[F|H],B]):- Eq == Equal,!, % trace,
metta_eq_def(Eq,Other,[F|H],BB),
eval_sometimes(Eq,_RetType,Depth,Self,B,BB).
*/
metta_atom_iter(_Eq,Depth,_,_,_):- Depth<3,!,fail.
metta_atom_iter(Eq,Depth,Self,Other,[And|Y]):- atom(And), is_comma(And),!,
(Y==[] -> true ;
( D2 is Depth -1, Y = [H|T],
metta_atom_iter(Eq,D2,Self,Other,H),metta_atom_iter(Eq,D2,Self,Other,[And|T]))).
%metta_atom_iter(Eq,Depth,_Slf,Other,X):- dcall0000000000(eval_args_true(Eq,_RetType,Depth,Other,X)).
metta_atom_iter(Eq,Depth,Self,Other,X):-
%copy_term(X,XX),
dcall0000000000(metta_atom_true(Eq,Depth,Self,Other,X)). %, X=XX.
metta_atom_true(_Eq,Depth,Self,Other,H):-
can_be_ok(metta_atom_true,H),
into_space(Depth,Self,Other,Space),
metta_atom(Space,H).
% is this OK?
%metta_atom_true(Eq,Depth,Self,Other,H):- nonvar(H), metta_eq_def(Eq,Other,H,B), D2 is Depth -1, eval_args_true(Eq,_,D2,Self,B).
% is this OK?
%metta_atom_true(Eq,Depth,Self,Other,H):- Other\==Self, nonvar(H), metta_eq_def(Eq,Other,H,B), D2 is Depth -1, eval_args_true(Eq,_,D2,Other,B).
eval_args_true_r(Eq,RetType,Depth,Self,X,TF1):-
((eval_ne(Eq,RetType,Depth,Self,X,TF1), \+ is_False(TF1));
( \+ is_False(TF1),metta_atom_true(Eq,Depth,Self,Self,X))).
eval_args_true(Eq,RetType,Depth,Self,X):-
% can_be_ok(eval_args_true,X),
% metta_atom_true(Eq,Depth,Self,Self,X);
(nonvar(X),eval_ne(Eq,RetType,Depth,Self,X,TF1), \+ is_False(TF1)).
metta_atom_iter_ref(Other,H,Ref):-clause(metta_atom_asserted(Other,H),true,Ref).
%can_be_ok(A,B):- cant_be_ok(A,B),!,fbug(cant_be_ok(A,B)),trace.
can_be_ok(_,_).
cant_be_ok(_,[Let|_]):- Let==let.
% =================================================================
% =================================================================
% =================================================================
% CASE/SWITCH
% =================================================================
% =================================================================
% =================================================================
% Macro: case
:- nodebug(metta(case)).
eval_20(Eq,RetType,Depth,Self,['switch',A,CL|T],Res):- !,
eval_20(Eq,RetType,Depth,Self,['case',A,CL|T],Res).
eval_20(Eq,RetType,Depth,Self,[P,X|More],YY):- fail, is_list(X),X=[_,_,_],simple_math(X),
eval_selfless_2(X,XX),X\=@=XX,!, eval_20(Eq,RetType,Depth,Self,[P,XX|More],YY).
% if there is only a void then always return nothing for each Case
eval_20(Eq,_RetType,Depth,Self,['case',A,[[Void,_]]],Res):-
'%void%' == Void,
eval_args(Eq,_UnkRetType,Depth,Self,A,_),!,Res =[].
% if there is nothing for case just treat like a collapse
eval_20(Eq,RetType,Depth,Self,['case',A,[]],NoResult):- !,
%forall(eval_args(Eq,_RetType2,Depth,Self,Expr,_),true),
once(eval_args(Eq,_RetType2,Depth,Self,A,_)),
make_nop(RetType,[],NoResult).
into_case_keys(_,[],[]).
into_case_keys(Nth,[Case0|CASES],[Key-Value|KVs]):-
Nth1 is Nth+1,
is_case(Key,Case0,Value),
if_trace((case),(format('~N'),writeqln(c(Nth,Key)=Value))),
into_case_keys(Nth1,CASES,KVs).
% Macro: case
eval_20(Eq,RetType,Depth,Self,['case',A,CL|T],Res):- !,
must_det_ll(T==[]),
into_case_list(CL,CASES),
into_case_keys(1,CASES,KVs),
eval_case(Eq,RetType,Depth,Self,A,KVs,Res).
eval_case(Eq,CaseRetType,Depth,Self,A,KVs,Res):-
if_trace((case),(writeqln('case'=A))),
((eval_args(Eq,_UnkRetType,Depth,Self,A,AA),
if_trace((case),writeqln('switch'=AA)),
(select_case(Depth,Self,AA,KVs,Value)->true;(member(Void -Value,KVs),Void=='%void%')))
*->true;(member(Void -Value,KVs),Void=='%void%')),
eval_args(Eq,CaseRetType,Depth,Self,Value,Res).
select_case(Depth,Self,AA,Cases,Value):-