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 Types::Standard qw(ArrayRef); |
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7 | use DX::Utils qw(expand_deps); |
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8 | |
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9 | use DX::Class; |
10 | |
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11 | with 'DX::Role::Step'; |
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12 | |
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13 | has resolves => (is => 'lazy', init_arg => undef, builder => sub { |
14 | my ($self) = @_; |
15 | $self->resolution_space->proposition; |
16 | }); |
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17 | |
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18 | has resolution_space => (is => 'ro', isa => ResolutionSpace); |
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19 | |
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20 | has current_resolution => (is => 'lazy', init_arg => undef, builder => sub { |
21 | my ($self) = @_; |
22 | $self->resolution_space->next_resolution; |
23 | }); |
24 | |
25 | has actions => (is => 'lazy', init_arg => undef, builder => sub { |
26 | my ($self) = @_; |
27 | $self->current_resolution->actions; |
28 | }); |
29 | |
30 | has depends_on => (is => 'lazy', init_arg => undef, builder => sub { |
31 | my ($self) = @_; |
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32 | expand_deps($self->current_resolution->veracity_depends_on); |
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33 | }); |
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34 | |
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35 | has alternative_step => (is => 'lazy', init_arg => undef, builder => sub { |
36 | my ($self) = @_; |
37 | my $rspace = $self->resolution_space->remaining_resolution_space; |
38 | return undef unless @{$rspace->members}; |
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39 | return $rspace->next_step; |
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40 | }); |
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41 | |
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42 | sub but_first { |
43 | my ($self, @actions) = @_; |
44 | $self->but(actions => [ @actions, @{$self->actions} ]); |
45 | } |
46 | |
0498469a |
47 | sub but_with_dependencies_on { |
48 | my ($self, @deps) = @_; |
49 | $self->but(depends_on => [ @{$self->depends_on}, @deps ]); |
50 | } |
51 | |
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52 | sub apply_to { |
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53 | my ($self, $old_ss) = @_; |
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54 | trace resolve => [ statement => [ |
55 | [ symbol => 'resolve' ], |
56 | [ block => [ |
57 | [ statement => [ |
58 | [ symbol => 'proposition' ], |
59 | @{$self->resolves->for_deparse->[1]}, |
60 | ] ], |
61 | (@{$self->actions} |
62 | ? [ statement => [ |
63 | [ symbol => 'actions' ], |
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64 | [ block => $self->actions ], |
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65 | ] ] |
66 | : ()), |
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67 | [ statement => [ |
68 | [ symbol => 'depends_on' ], |
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69 | [ block => [ |
70 | map [ statement => [ |
71 | [ symbol => (split '::', ${$_->[0]})[-1] ], |
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72 | [ value_path => [ @{$_}[1..$#$_] ] ] |
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73 | ] ], @{$self->depends_on} |
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74 | ] ], |
75 | ] ], |
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76 | ] ] |
77 | ] ]; |
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78 | my $ns = do { |
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79 | if (my $prop = $old_ss->next_proposition) { |
86dbedb6 |
80 | DX::Step::ConsiderProposition->new( |
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81 | proposition => $prop |
82 | ) |
83 | } else { |
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84 | $old_ss->on_solution_step |
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85 | } |
86 | }; |
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87 | my $ss = $old_ss->but( |
88 | next_step => $ns, |
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89 | decisions_taken => [ |
90 | [ $self->resolution_space, $old_ss ], |
91 | @{$old_ss->decisions_taken} |
92 | ], |
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93 | ); |
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94 | my $new_ss = $self->_apply_to_ss($ss); |
95 | return $ss->but(next_step => DX::Step::Backtrack->new) unless $new_ss; |
96 | return $new_ss; |
9d759b64 |
97 | } |
98 | |
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99 | sub _apply_to_ss { |
100 | my ($self, $old_ss) = @_; |
101 | my $old_hyp = $old_ss->current_hypothesis; |
77065529 |
102 | (my $hyp, my @recheck) = $old_hyp->with_resolution( |
cdca8723 |
103 | $self->resolves, $self->depends_on, $self->actions |
104 | ); |
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105 | return undef unless $hyp; |
106 | return $self->_recheck_for( |
107 | $old_ss->but(current_hypothesis => $hyp), |
108 | @recheck |
109 | ); |
04844099 |
110 | } |
111 | |
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112 | sub _recheck_for { |
113 | my ($self, $old_ss, @recheck) = @_; |
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114 | |
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115 | return $old_ss unless @recheck; |
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116 | |
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117 | my $ss = $old_ss->but( |
118 | next_step => DX::Step::EnterRecheck->new( |
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119 | proposition_list => \@recheck, |
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120 | on_completion_step => $old_ss->next_step, |
121 | on_failure_step => DX::Step::Backtrack->new, |
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122 | ), |
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123 | ); |
124 | |
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125 | return $ss; |
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126 | } |
127 | |
128 | 1; |