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-B and fixes

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This commit is contained in:
Vitor Santos Costa 2016-07-31 10:34:00 -05:00
parent 5db8e25735
commit 9db06bcfe1
1 changed files with 171 additions and 127 deletions
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250
pl/boot.yap
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@ -171,10 +171,10 @@ list, since backtracking could not "pass through" the cut.
*/
system_module(_Mod, _SysExps, _Decls) :- ! .
system_module(_Mod, _SysExps, _Decls).
% new_system_module(Mod).
use_system_module(_init, _SysExps) :- !.
use_system_module(_init, _SysExps).
private(_).
@ -251,6 +251,9 @@ private(_).
:- use_system_module( '$_strict_iso', ['$check_iso_strict_clause'/1,
'$iso_check_goal'/2]).
'$early_print_message'(Level, Msg) :-
'$pred_exists'(print_message(_,_), prolog), !,
print_message( Level, Msg).
'$early_print_message'(informational, _) :-
yap_flag( verbose, S),
S == silent,
@ -258,9 +261,11 @@ private(_).
'$early_print_message'(_, absolute_file_path(X, Y)) :- !,
format(user_error, X, Y), nl(user_error).
'$early_print_message'(_, loading( C, F)) :- !,
format(user_error, '~*|% ~a ~w...~n', [2,C,F]).
(yap_flag( verbose_load , silent ) -> true;
format(user_error, '~*|% ~a ~w...~n', [2,C,F]) ).
'$early_print_message'(_, loaded(F,C,M,T,H)) :- !,
format(user_error, '~*|% ~a:~w ~a ~d bytes in ~d seconds...~n', [2, M, F ,C, H, T]).
(yap_flag( verbose_load , silent ) -> true;
format(user_error, '~*|% ~a:~w ~a ~d bytes in ~d seconds...~n', [2, M, F ,C, H, T]) ).
'$early_print_message'(Level, Msg) :-
source_location(F0, L),
!,
@ -268,31 +273,43 @@ private(_).
'$early_print_message'(Level, Msg) :-
format(user_error, 'unprocessed ~a ~w ~n', [Level,Msg]).
'$handle_error'(_Action,_G0,_M0) :- fail.
% cases where we cannot afford to ever fail.
'$undefp0'([ImportingMod|G], _) :-
'$bootstrap_predicate'('$expand_a_clause'(_,_,_,_), _M, _) :- !,
fail.
'$bootstrap_predicate'('$imported_predicate'(_,_,_,_), _M, _) :- !,
fail.
'$bootstrap_predicate'('$all_directives'(_), _M, _) :- !,
fail.
'$bootstrap_predicate'('$LoopError'( Error, _), _M, _) :- !,
source_location(F0, L),
format('~a:~d:0: error in bootstrap:~n ~w~n', [F0,L,Error]),
fail.
'$bootstrap_predicate'(delayed_goals(_, _, _ ), _M, _) :- !,
fail.
'$bootstrap_predicate'(sort(L, S), _M, _) :- !,
'$sort'(L, S).
'$bootstrap_predicate'(print_message(Context, Msg), _M, _) :- !,
'$early_print_message'(Context, Msg).
'$bootstrap_predicate'(meta_predicate(G), M, _) :- !,
strip_module(M:G, M1, G1),
'$meta_predicate'(M1:G1).
'$bootstrap_predicate'(G, ImportingMod, _) :-
recorded('$import','$import'(ExportingModI,ImportingMod,G,G0I,_,_),_), !,
% writeln('$execute0'(G0I, ExportingModI)),
'$execute0'(G0I, ExportingModI).
'$undefp0'([_|print_message(Context, Msg)], _) :- !,
'$early_print_message'(Context, Msg).
% undef handler
'$undefp0'([M0|G0], Action) :-
% undef handler
'$bootstrap_predicate'(G0, M0, Action) :-
% make sure we do not loop on undefined predicates
yap_flag( unknown, Action, fail),
Action \= fail,
'$handle_error'(Action,G0,M0),
clause_location(Call, Caller),
source_module(M),
strip_module(M:Goal,M1,NGoal),
throw(error(Error, [[g|g(M1:NGoal)],[p|Call],[e|Caller],[h|g(Head)]])).
format(user_error,'undefined directive ~w', [M0:G0]),
strip_module(M0:G0,M1,NGoal),
throw(error(evaluation(undefined,M0:G0),
[[g|g(M1:NGoal)],[p|Call],[e|Caller],[h|g(M0:G0)]])).
%
%
%
'$undefp0'([M|G], Action) :-
'$bootstrap_predicate'(G, M, Action).
/** @pred true is iso
Succeed.
@ -325,23 +342,14 @@ true :- true.
set_value('$yap_inited', true),
% do catch as early as possible
(
% \+ '$uncaught_throw'
current_prolog_flag(halt_after_consult, false),
current_prolog_flag(verbose, normal)
% \+ '$uncaught_throw'
->
'$version'
;
true
),
% '$init_preds', % needs to be done before library_directory
% (
% retractall(user:library_directory(_)),
% '$system_library_directories'(D),
% assertz(user:library_directory(D)),
% fail
% ;
% true
% ),
current_prolog_flag(file_name_variables, OldF),
set_prolog_flag(file_name_variables, true),
'$init_consult',
@ -361,14 +369,25 @@ true :- true.
prolog_flag(resource_database, RootPath),
file_directory_name( RootPath, Dir ),
atom_concat( Dir, '/init.yap' , Init),
(
% is lib_dir set?
system_library( LibDir )
->
true
;
% get it from boot.yap
atom_concat( LibDir, '/pl' , Dir),
system_library(LibDir)
),
bootstrap(Init),
set_prolog_flag(verbose, OldV),
module( user ),
'$make_saved_state'
;
true
% use saved state
'$init_state'
),
'$init_state',
'$db_clean_queues'(0),
% this must be executed from C-code.
% '$startup_saved_state',
@ -380,7 +399,7 @@ true :- true.
'$make_saved_state' :-
current_prolog_flag(os_argv, Args),
(
member( Arg, Args ),
lists:member( Arg, Args ),
atom_concat( '-B', _, Arg )
->
qsave_program( 'startup.yss'),
@ -441,10 +460,10 @@ true :- true.
/* main execution loop */
'$read_toplevel'(Goal, Bindings) :-
'$prompt',
'$system_catch'(read_term(user_input,
catch(read_term(user_input,
Goal,
[variable_names(Bindings), syntax_errors(dec10)]),
prolog, E, '$handle_toplevel_error'( E) ).
E, '$handle_toplevel_error'( E) ).
'$handle_toplevel_error'( syntax_error(_)) :-
!,
@ -628,9 +647,10 @@ number of steps.
O = (:- G1)
->
'$current_module'(M),
'$process_directive'(G1, Option, M, VL, Pos)
;
'$execute_commands'(O,VL,Pos,Option,O)
'$execute_commands'(G1,VL,Pos,Option,O)
).
'$execute_command'((?-G), VL, Pos, Option, Source) :-
Option \= top,
@ -660,7 +680,12 @@ number of steps.
%
% default case
%
'$process_directive'(Gs, Mode, M, VL, Pos) :-
'$process_directive'(Gs, _Mode, M, _VL, _Pos) :-
'$undefined'('$all_directives'(Gs),prolog),
!,
'$execute'(M:Gs).
'$process_directive'(Gs, Mode, M, VL, Pos) :-
'$all_directives'(Gs), !,
'$exec_directives'(Gs, Mode, M, VL, Pos).
@ -675,15 +700,7 @@ number of steps.
% but YAP and SICStus does.
%
'$process_directive'(G, Mode, M, VL, Pos) :-
( '$undefined'('$save_directive'(G, Mode, M, VL, Pos),prolog) ->
true
;
'$save_directive'(G, Mode, M, VL, Pos)
->
true
;
true
),
'$save_directive'(G, Mode, M, VL, Pos),
(
'$execute'(M:G)
->
@ -741,7 +758,7 @@ number of steps.
recorded('$import','$import'(NM,Mod,NH,H,_,_),RI),
% NM \= Mod,
functor(NH,N,Ar),
'$early_print'(warning,redefine_imported(Mod,NM,Mod:N/Ar)),
print_message(warning,redefine_imported(Mod,NM,Mod:N/Ar)),
erase(RI),
fail.
'$init_pred'(H, Mod, Where ) :-
@ -844,7 +861,7 @@ number of steps.
).
'$out_neg_answer' :-
'$early_print'( help, false),
print_message( help, false),
fail.
@ -891,11 +908,11 @@ number of steps.
->
'$add_nl_outside_console',
(
'$undefined'('$early_print'(_,_),prolog)
'$undefined'(print_message(_,_),prolog)
->
format(user_error,'yes~n', [])
;
'$early_print'(help,yes)
print_message(help,yes)
)
;
C== 13
@ -1313,22 +1330,10 @@ not(G) :- \+ '$execute'(G).
'$check_callable'(_,_).
'$bootstrap' :-
bootstrap('init.yap'),
module(user),
'$live'.
'$silent_bootstrap'(F) :-
yap_flag(verbose, Old, silent),
bootstrap( F ),
yap_flag(verbose, _, Old),
'$live'.
bootstrap(F) :-
% '$open'(F, '$csult', Stream, 0, 0, F),
% '$open'(F, '$csult', Stream, 0, 0, F),
% '$file_name'(Stream,File),
yap_flag(verbose_load, Old, silent),
open(F, read, Stream),
stream_property(Stream, [file_name(File)]),
'$start_consult'(consult, File, LC),
@ -1342,7 +1347,7 @@ bootstrap(F) :-
H0 is heapused, '$cputime'(T0,_),
format(user_error, '~*|% consulting ~w...~n', [LC,F])
),
'$loop'(Stream,consult),
'$boot_loop'(Stream,consult),
working_directory(_, OldD),
'$current_module'(_, prolog),
'$end_consult',
@ -1355,12 +1360,9 @@ bootstrap(F) :-
format(user_error, '~*|% ~w consulted ~w bytes in ~d msecs~n', [LC,F,H,T])
),
!,
yap_flag(verbose_load, _, Old),
close(Stream).
% '$undefp'([M0|G0], Default) :-
% writeln(M0:G0),
% fail.
'$loop'(Stream,exo) :-
prolog_flag(agc_margin,Old,0),
@ -1390,6 +1392,52 @@ bootstrap(F) :-
),
!.
'$boot_loop'(Stream,Where) :-
repeat,
'$current_module'( OldModule, OldModule ),
read_clause(Stream, Command, [module(OldModule), syntax_errors(dec10),variable_names(_Vars), term_position(_Pos)]),
(Command == end_of_file
->
!
;
Command = (:- Goal) ->
'$system_catch'('$boot_execute'(Goal), prolog, Error,
user:'$LoopError'(Error, consult) ),
fail
;
Command = (H --> B) ->
'$system_catch'('$boot_dcg'(H,B, Where), prolog, Error,
user:'$LoopError'(Error, consult) ),
fail
;
'$system_catch'('$boot_clause'( Command, Where ), prolog, Error,
user:'$LoopError'(Error, consult) ),
fail
).
'$boot_execute'( Goal ) :-
'$execute'( Goal ),
!.
'$boot_execute'( Goal ) :-
format(user_error, ':- ~w failed.~n', [Goal]).
'$boot_dcg'( H, B, Where ) :-
'$translate_rule'((H --> B), (NH :- NB) ),
'$$compile'((NH :- NB), Where, ( H --> B), _R),
!.
'$boot_dcg'( H, B, _ ) :-
format(user_error, ' ~w --> ~w failed.~n', [H,B]).
'$boot_clause'( Command, Where ) :-
'$$compile'(Command, Where, Command, _R),
!.
'$boot_clause'( Command, _ ) :-
format(user_error, ' ~w failed.~n', [Command]).
'$enter_command'(Stream, Mod, Status) :-
prompt1(': '), prompt(_,' '),
Options = [module(Mod), syntax_errors(dec10),variable_names(Vars), term_position(Pos)],
@ -1519,7 +1567,7 @@ is responsible to capture uncaught exceptions.
*/
catch(G, C, A) :-
'$catch'(G,_,[C|A]).
'$catch'(G,C,A).
% makes sure we have an environment.
'$true'.
@ -1532,24 +1580,44 @@ catch(G, C, A) :-
%
'$system_catch'(G, M, C, A) :-
% check current trail
'$catch'(M:G,_,[C|A]).
'$catch'(M:G,C,A).
'$catch'(MG,_,_) :-
'$$save_by'(CP0),
'$execute'(MG),
'$$save_by'(CP1),
% remove catch
(CP0 == CP1 -> !; true ).
'$catch'(_,C0,[C|A]) :-
nonvar(C0),
C0 = throw(Ball),
( catch_ball( Ball, C)
(
CP0 == CP1
->
'$execute'(A)
!
;
throw(Ball)
true
).
'$catch'(_,C,A) :-
nonvar(C),
'$run_catch'(A, C).
% variable throws are user-handled.
'$run_catch'(G,E) :-
E = '$VAR'(_),
!,
call(G ).
'$run_catch'('$Error'(E),E) :-
!,
'$LoopError'(E, top ).
'$run_catch'('$LoopError'(E, Where),E) :-
!,
'$LoopError'(E, Where).
'$run_catch'('$TraceError'(E, GoalNumber, G, Module, CalledFromDebugger),E) :-
!,
'$TraceError'(E, GoalNumber, G, Module, CalledFromDebugger).
'$run_catch'(_Signal,E) :-
functor( E, N, _),
'$hidden_atom'(N), !,
throw(E).
'$run_catch'(E, _Signal) :-
call(E).
%
% throw has to be *exactly* after system catch!
@ -1563,25 +1631,8 @@ a matching catch/3, or until reaching top-level.
*/
throw(Ball) :-
( var(Ball) ->
'$do_error'(instantiation_error,throw(Ball))
;
% get current jump point
'$jump_env_and_store_ball'(Ball)
).
catch_ball(Abort, _) :-
Abort == '$abort', !, fail.
% system defined throws should be ignored by user, unless the
% user is hacking away.
catch_ball(Ball, V) :-
var(V),
nonvar(Ball),
Ball = error(Type,_), % internal error ??
functor(Type, Name, _),
atom_codes(Name, [0'$|_]), %'0
!, fail.
catch_ball(C, C).
'$jump_env_and_store_ball'(Ball).
'$run_toplevel_hooks' :-
current_prolog_flag(break_level, 0 ),
@ -1600,13 +1651,6 @@ log_event( String, Args ) :-
format( atom( M ), String, Args),
log_event( M ).
'$early_print'( Lev, Msg ) :-
( '$undefined'(print_message(_,_),prolog) ->
'$early_print_message'(Lev, Msg)
;
print_message(Lev, Msg)
).
'$prompt' :-
current_prolog_flag(break_level, BreakLevel),
(