491 lines
15 KiB
Prolog
491 lines
15 KiB
Prolog
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%%
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%% preprocessing for meta-calls
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%%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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:- use_module(library(lists), [append/3]).
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:- use_module(library(charsio), [format_to_chars/3, read_from_chars/2]).
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:- use_module(library(error), [must_be/2]).
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:- use_module(library(occurs), [sub_term/2]).
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:- multifile user:goal_expansion/3.
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user:goal_expansion(checklist(Meta, List), Mod, Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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!,
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Mod, Module),
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% the new goal
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pred_name(checklist, 2, Proto, GoalName),
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append(MetaVars, [List], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[]], Base),
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append_args(HeadPrefix, [[In|Ins]], RecursionHead),
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append_args(Pred, [In], Apply),
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append_args(HeadPrefix, [Ins], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :- Apply, RecursiveCall)
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], Module).
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user:goal_expansion(maplist(Meta, List), Mod, Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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!,
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Mod, Module),
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% the new goal
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pred_name(maplist, 2, Proto, GoalName),
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append(MetaVars, [List], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[]], Base),
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append_args(HeadPrefix, [[In|Ins]], RecursionHead),
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append_args(Pred, [In], Apply),
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append_args(HeadPrefix, [Ins], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :- Apply, RecursiveCall)
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], Module).
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user:goal_expansion(maplist(Meta, ListIn, ListOut), Mod, Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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!,
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Mod, Module),
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% the new goal
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pred_name(maplist, 3, Proto, GoalName),
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append(MetaVars, [ListIn, ListOut], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], []], Base),
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append_args(HeadPrefix, [[In|Ins], [Out|Outs]], RecursionHead),
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append_args(Pred, [In, Out], Apply),
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append_args(HeadPrefix, [Ins, Outs], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :- Apply, RecursiveCall)
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], Module).
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user:goal_expansion(maplist(Meta, L1, L2, L3), Mod, Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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!,
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Mod, Module),
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% the new goal
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pred_name(maplist, 4, Proto, GoalName),
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append(MetaVars, [L1, L2, L3], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], [], []], Base),
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append_args(HeadPrefix, [[A1|A1s], [A2|A2s], [A3|A3s]], RecursionHead),
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append_args(Pred, [A1, A2, A3], Apply),
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append_args(HeadPrefix, [A1s, A2s, A3s], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :- Apply, RecursiveCall)
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], Module).
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user:goal_expansion(maplist(Meta, L1, L2, L3, L4), Mod, Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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!,
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Mod, Module),
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% the new goal
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pred_name(maplist, 5, Proto, GoalName),
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append(MetaVars, [L1, L2, L3, L4], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], [], [], []], Base),
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append_args(HeadPrefix, [[A1|A1s], [A2|A2s], [A3|A3s], [A4|A4s]], RecursionHead),
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append_args(Pred, [A1, A2, A3, A4], Apply),
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append_args(HeadPrefix, [A1s, A2s, A3s, A4s], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :- Apply, RecursiveCall)
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], Module).
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user:goal_expansion(selectlist(Meta, ListIn, ListOut), Mod, Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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!,
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Mod, Module),
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% the new goal
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pred_name(selectlist, 3, Proto, GoalName),
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append(MetaVars, [ListIn, ListOut], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], []], Base),
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append_args(HeadPrefix, [[In|Ins], Outs], RecursionHead),
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append_args(Pred, [In], Apply),
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append_args(HeadPrefix, [Ins, NOuts], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :-
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(Apply -> Outs = [In|NOuts]; Outs = NOuts),
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RecursiveCall)
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], Module).
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% same as selectlist
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user:goal_expansion(include(Meta, ListIn, ListOut), Mod, Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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!,
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Mod, Module),
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% the new goal
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pred_name(include, 3, Proto, GoalName),
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append(MetaVars, [ListIn, ListOut], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], []], Base),
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append_args(HeadPrefix, [[In|Ins], Outs], RecursionHead),
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append_args(Pred, [In], Apply),
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append_args(HeadPrefix, [Ins, NOuts], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :-
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(Apply -> Outs = [In|NOuts]; Outs = NOuts),
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RecursiveCall)
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], Module).
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user:goal_expansion(exclude(Meta, ListIn, ListOut), Mod, Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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!,
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Mod, Module),
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% the new goal
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pred_name(exclude, 3, Proto, GoalName),
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append(MetaVars, [ListIn, ListOut], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], []], Base),
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append_args(HeadPrefix, [[In|Ins], Outs], RecursionHead),
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append_args(Pred, [In], Apply),
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append_args(HeadPrefix, [Ins, NOuts], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :-
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(Apply -> Outs = [In|NOuts]; Outs = NOuts),
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RecursiveCall)
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], Module).
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user:goal_expansion(partition(Meta, ListIn, List1, List2), Mod, Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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!,
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Mod, Module),
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% the new goal
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pred_name(partition, 4, Proto, GoalName),
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append(MetaVars, [ListIn, List1, List2], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], [], []], Base),
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append_args(HeadPrefix, [[In|Ins], Outs1, Outs2], RecursionHead),
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append_args(Pred, [In], Apply),
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append_args(HeadPrefix, [Ins, NOuts1, NOuts2], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :-
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(Apply -> Outs1 = [In|NOuts1], Outs2 = NOuts2; Outs1 = NOuts1, Outs2 = [In|NOuts2]),
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RecursiveCall)
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], Module).
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user:goal_expansion(partition(Meta, ListIn, List1, List2, List3), Mod, Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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!,
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Mod, Module),
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% the new goal
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pred_name(partition2, 5, Proto, GoalName),
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append(MetaVars, [ListIn, List1, List2, List3], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], [], [], []], Base),
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append_args(HeadPrefix, [[In|Ins], Outs1, Outs2, Outs3], RecursionHead),
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append_args(Pred, [In,Diff], Apply),
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append_args(HeadPrefix, [Ins, NOuts1, NOuts2, NOuts3], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :-
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Apply,
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(Diff == (<) ->
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Outs1 = [In|NOuts1],
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Outs2 = NOuts2,
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Outs3 = NOuts3
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;
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Diff == (=) ->
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Outs1 = NOuts1,
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Outs2 = [In|NOuts2],
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Outs3 = NOuts3
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;
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Diff == (>) ->
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Outs1 = NOuts1,
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Outs2 = NOuts2,
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Outs3 = [In|NOuts3]
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;
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error:must_be(oneof([<,=,>]), Diff)
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),
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RecursiveCall)
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], Module).
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user:goal_expansion(convlist(Meta, ListIn, ListOut), Mod, Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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!,
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Mod, Module),
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% the new goal
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pred_name(convlist, 3, Proto, GoalName),
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append(MetaVars, [ListIn, ListOut], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], []], Base),
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append_args(HeadPrefix, [[In|Ins], Outs], RecursionHead),
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append_args(Pred, [In, Out], Apply),
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append_args(HeadPrefix, [Ins, NOuts], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :-
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(Apply -> Outs = [Out|NOuts]; Outs = NOuts),
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RecursiveCall)
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], Module).
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user:goal_expansion(sumlist(Meta, List, AccIn, AccOut), Mod, Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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!,
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Mod, Module),
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% the new goal
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pred_name(sumlist, 4, Proto, GoalName),
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append(MetaVars, [List, AccIn, AccOut], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], Acc, Acc], Base),
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append_args(HeadPrefix, [[In|Ins], Acc1, Acc2], RecursionHead),
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append_args(Pred, [In, Acc1, Acc3], Apply),
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append_args(HeadPrefix, [Ins, Acc3, Acc2], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :- Apply, RecursiveCall)
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], Module).
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user:goal_expansion(mapargs(Meta, In, Out), _Module, NewGoal) :-
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goal_expansion_allowed,
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( var(Out)
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->
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NewGoal = (
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In =.. [F|InArgs],
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maplist(Meta, InArgs, OutArgs),
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Out =.. [F|OutArgs]
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)
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;
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NewGoal = (
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Out =.. [F|OutArgs],
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maplist(Meta, InArgs, OutArgs),
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In =.. [F|InArgs]
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)
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).
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user:goal_expansion(sumargs(Meta, Term, AccIn, AccOut), _Module, Goal) :-
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goal_expansion_allowed,
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Goal = (
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Term =.. [_|TermArgs],
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sumlist(Meta, TermArgs, AccIn, AccOut)
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).
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user:goal_expansion(mapnodes(Meta, InTerm, OutTerm), Mod, Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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!,
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Mod, Module),
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% the new goal
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pred_name(mapnodes, 3, Proto, GoalName),
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append(MetaVars, [[InTerm], [OutTerm]], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], []], Base),
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append_args(HeadPrefix, [[In|Ins], [Out|Outs]], RecursionHead),
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append_args(Pred, [In, Temp], Apply),
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append_args(HeadPrefix, [InArgs, OutArgs], SubRecursiveCall),
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append_args(HeadPrefix, [Ins, Outs], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :-
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Apply,
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(compound(Temp)
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->
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Temp =.. [F|InArgs],
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SubRecursiveCall,
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Out =.. [F|OutArgs]
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;
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Out = Temp
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),
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RecursiveCall)
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], Module).
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user:goal_expansion(checknodes(Meta, Term), Mod, Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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!,
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Mod, Module),
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% the new goal
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pred_name(checknodes, 2, Proto, GoalName),
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append(MetaVars, [[Term]], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[]], Base),
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append_args(HeadPrefix, [[In|Ins]], RecursionHead),
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append_args(Pred, [In], Apply),
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append_args(HeadPrefix, [Args], SubRecursiveCall),
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append_args(HeadPrefix, [Ins], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :-
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Apply,
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(compound(In)
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->
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In =.. [_|Args],SubRecursiveCall
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;
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true
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),
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RecursiveCall)
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], Module).
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user:goal_expansion(sumnodes(Meta, Term, AccIn, AccOut), Mod, Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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!,
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Mod, Module),
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% the new goal
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pred_name(sumnodes, 4, Proto, GoalName),
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append(MetaVars, [[Term], AccIn, AccOut], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], Acc, Acc], Base),
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append_args(HeadPrefix, [[In|Ins], Acc1, Acc2], RecursionHead),
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append_args(Pred, [In, Acc1, Acc3], Apply),
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append_args(HeadPrefix, [Args, Acc3, Acc4], SubRecursiveCall),
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append_args(HeadPrefix, [Ins, Acc4, Acc2], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :-
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Apply,
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(compound(In)
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->
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In =.. [_|Args],SubRecursiveCall
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;
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Acc3 = Acc4
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),
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RecursiveCall)
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], Module).
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:- unhide('$translate_rule').
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% stolen from SWI-Prolog
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user:goal_expansion(phrase(NT,Xs), Mod, NTXsNil) :-
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user:goal_expansion(phrase(NT,Xs,[]), Mod, NTXsNil).
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user:goal_expansion(phrase(NT,Xs0,Xs), _Mod, NewGoal) :-
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goal_expansion_allowed,
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Goal = phrase(NT,Xs0,Xs),
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nonvar(NT),
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catch('$translate_rule'((pseudo_nt --> NT), Rule),
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error(Pat,ImplDep),
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( \+ harmless_dcgexception(Pat),
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throw(error(Pat,ImplDep))
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)),
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Rule = (pseudo_nt(Xs0c,Xsc) :- NewGoal0),
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Goal \== NewGoal0,
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% apply translation only if we are safe
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\+ contains_illegal_dcgnt(NT), !,
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( var(Xsc), Xsc \== Xs0c
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-> Xs = Xsc, NewGoal1 = NewGoal0
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; NewGoal1 = (NewGoal0, Xsc = Xs)
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),
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( var(Xs0c)
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-> Xs0 = Xs0c,
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NewGoal = NewGoal1
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; ( Xs0 = Xs0c, NewGoal1 ) = NewGoal
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).
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:- hide('$translate_rule').
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%%%%%%%%%%%%%%%%%%%%
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% utilities
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%%%%%%%%%%%%%%%%%%%%
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compile_aux([Clause|Clauses], Module) :-
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% compile the predicat declaration if needed
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( Clause = (Head :- _)
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; Clause = Head ),
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!,
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functor(Head, F, N),
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( current_predicate(Module:F/N)
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->
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true
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;
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% format("*** Creating auxiliary predicate ~q~n", [F/N]),
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% checklist(portray_clause, [Clause|Clauses]),
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compile_term([Clause|Clauses], Module)
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).
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compile_term([], _).
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compile_term([Clause|Clauses], Module) :-
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assert_static(Module:Clause),
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compile_term(Clauses, Module).
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append_args(Term, Args, NewTerm) :-
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Term =.. [Meta|OldArgs],
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append(OldArgs, Args, GoalArgs),
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NewTerm =.. [Meta|GoalArgs].
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aux_preds(Module:Meta, MetaVars, Pred, PredVars, Proto, _, OModule) :- !,
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Module, OModule).
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto, Module, Module) :-
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Meta =.. [F|Args],
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aux_args(Args, MetaVars, PredArgs, PredVars, ProtoArgs),
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Pred =.. [F|PredArgs],
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Proto =.. [F|ProtoArgs].
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aux_args([], [], [], [], []).
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aux_args([Arg|Args], MVars, [Arg|PArgs], PVars, [Arg|ProtoArgs]) :-
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ground(Arg), !,
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aux_args(Args, MVars, PArgs, PVars, ProtoArgs).
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aux_args([Arg|Args], [Arg|MVars], [PVar|PArgs], [PVar|PVars], ['_'|ProtoArgs]) :-
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aux_args(Args, MVars, PArgs, PVars, ProtoArgs).
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pred_name(Macro, Arity, Proto, Name) :-
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format_to_chars('\'~a(~d,~w)\'.',[Macro, Arity, Proto], Chars),
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read_from_chars(Chars, Name).
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harmless_dcgexception(instantiation_error). % ex: phrase(([1],x:X,[3]),L)
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harmless_dcgexception(type_error(callable,_)). % ex: phrase(27,L)
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%% contains_illegal_dcgnt(+Term) is semidet.
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%
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% True if Term contains a non-terminal we cannot deal with using
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% goal-expansion. The test is too general approximation, but safe.
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contains_illegal_dcgnt(NT) :-
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sub_term(I, NT),
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|
nonvar(I),
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|
( I = ! ; I = phrase(_,_,_) ), !.
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% write(contains_illegal_nt(NT)), % JW: we do not want to write
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% nl.
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goal_expansion_allowed :-
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\+ current_prolog_flag(xref, true).
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