Commit | Line | Data |
a3104d41 |
1 | package DX::Step::ResolveProposition; |
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2 | |
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3 | use DX::Step::EnterRecheck; |
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4 | use DX::Step::Backtrack; |
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5 | |
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6 | use DX::Utils qw(expand_deps); |
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7 | |
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8 | use DX::Class; |
9 | |
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10 | with 'DX::Role::Step'; |
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11 | |
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12 | has resolution_space => (is => 'ro', isa => ResolutionSpace); |
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13 | |
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14 | sub resolves { shift->resolution_space->proposition } |
15 | |
16 | sub current_resolution { shift->resolution_space->next_resolution } |
17 | |
18 | sub actions { shift->current_resolution->actions } |
19 | |
20 | sub depends_on { shift->current_resolution->veracity_depends_on } |
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21 | |
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22 | sub but_first { |
23 | my ($self, @actions) = @_; |
24 | $self->but(actions => [ @actions, @{$self->actions} ]); |
25 | } |
26 | |
0498469a |
27 | sub but_with_dependencies_on { |
28 | my ($self, @deps) = @_; |
29 | $self->but(depends_on => [ @{$self->depends_on}, @deps ]); |
30 | } |
31 | |
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32 | sub apply_to { |
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33 | my ($self, $old_ss) = @_; |
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34 | trace resolve => [ statement => [ |
35 | [ symbol => 'resolve' ], |
36 | [ block => [ |
37 | [ statement => [ |
38 | [ symbol => 'proposition' ], |
39 | @{$self->resolves->for_deparse->[1]}, |
40 | ] ], |
41 | (@{$self->actions} |
42 | ? [ statement => [ |
43 | [ symbol => 'actions' ], |
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44 | [ block => $self->actions ], |
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45 | ] ] |
46 | : ()), |
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47 | [ statement => [ |
48 | [ symbol => 'depends_on' ], |
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49 | [ block => [ |
50 | map [ statement => [ |
51 | [ symbol => (split '::', ${$_->[0]})[-1] ], |
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52 | [ value_path => [ @{$_}[1..$#$_] ] ] |
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53 | ] ], @{$self->depends_on} |
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54 | ] ], |
55 | ] ], |
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56 | ] ] |
57 | ] ]; |
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58 | my $ns = do { |
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59 | if (my $prop = $old_ss->next_proposition) { |
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60 | DX::Step::ConsiderProposition->new( |
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61 | proposition => $prop |
62 | ) |
63 | } else { |
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64 | $old_ss->on_solution_step |
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65 | } |
66 | }; |
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67 | my $ss = $old_ss->but( |
68 | next_step => $ns, |
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69 | decisions_taken => [ |
70 | [ $self->resolution_space, $old_ss ], |
71 | @{$old_ss->decisions_taken} |
72 | ], |
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73 | ); |
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74 | my $old_hyp = $old_ss->current_hypothesis; |
77065529 |
75 | (my $hyp, my @recheck) = $old_hyp->with_resolution( |
cdca8723 |
76 | $self->resolves, $self->depends_on, $self->actions |
77 | ); |
161534ff |
78 | return $ss->but(next_step => DX::Step::Backtrack->new) unless $hyp; |
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79 | return $self->_recheck_for( |
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80 | $ss->but(current_hypothesis => $hyp), |
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81 | @recheck |
82 | ); |
04844099 |
83 | } |
84 | |
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85 | sub _recheck_for { |
86 | my ($self, $old_ss, @recheck) = @_; |
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87 | |
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88 | return $old_ss unless @recheck; |
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89 | |
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90 | my $ss = $old_ss->but( |
91 | next_step => DX::Step::EnterRecheck->new( |
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92 | proposition_list => \@recheck, |
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93 | on_completion_step => $old_ss->next_step, |
94 | on_failure_step => DX::Step::Backtrack->new, |
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95 | ), |
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96 | ); |
97 | |
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98 | return $ss; |
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99 | } |
100 | |
101 | 1; |