1 package DX::ShellSession;
4 use Scalar::Util qw(weaken);
7 use DX::Utils qw(deparse);
10 has shell_state => (is => 'rwp', required => 1, isa => ShellState);
13 is => 'lazy', builder => sub { DX::Expander->new(tcl => $_[0]->tcl) },
14 handles => [ qw(expand_args) ],
17 has tcl => (is => 'lazy', builder => sub {
21 $tcl->CreateCommand('?' => sub {
22 $self->apply_to_state([ 'new_query_state' ], [ mode => 'query' ]);
24 $tcl->CreateCommand('?+' => sub {
25 $self->apply_to_state([ mode => 'query' ]);
28 $tcl->CreateCommand('.' => sub {
29 $self->apply_to_state([ mode => 'shell' ]);
32 $tcl->CreateCommand('...' => sub {
33 $self->apply_to_state([ mode => 'shell' ]);
34 my $orig = my $cur = $self->shell_state->current_query_state;
36 $self->_set_shell_state(
37 $self->shell_state->but(current_query_state => $cur)
40 $cur = eval { $cur->with_forced_backtrack };
41 push our @Result, [ output => $@ ] if $@;
43 $self->_set_shell_state(
44 $self->shell_state->but(
45 current_query_state => $orig
50 $tcl->CreateCommand(qlist => sub {
51 push our @Result, map [ output => $_ ], @{
52 $self->shell_state->current_query_state->proposition_sequence->members
56 $tcl->CreateCommand(qvars => $qvars = sub {
57 my $locals = $self->shell_state->current_query_state->search_state
58 ->current_hypothesis->scope->locals->[0];
59 push our @Result, [ output => $locals ];
62 $tcl->CreateCommand(qdeps => sub {
63 my $rps = $self->shell_state->current_query_state->search_state
64 ->current_hypothesis->resolved_propositions;
65 push our @Result, [ output => $rps ];
68 $tcl->CreateCommand(qact => sub {
69 my $act = $self->shell_state->current_query_state->search_state
70 ->current_hypothesis->actions;
71 push our @Result, map [ output => $_ ], @$act;
75 keys %{$self->shell_state->template_query_state->predicates}
77 $tcl->CreateCommand($pred => sub {
78 my (undef, undef, undef, @args) = @_; # ($data, $interp, $pred)
79 $self->apply_predicate($pred => @args);
82 $tcl->CreateCommand(const => sub {
83 my (undef, undef, undef, $name, $value) = @_;
84 my $tqs = $self->shell_state->template_query_state;
85 my $new_tqs = $tqs->but(
86 globals => $tqs->globals->with_member_at(
87 $name => $self->expand_args($value),
90 $self->_set_shell_state(
91 $self->shell_state->but(
92 template_query_state => $new_tqs
96 $tcl->CreateCommand(trace => sub {
97 my (undef, undef, undef, @trace) = @_;
98 $self->_set_shell_state(
99 $self->shell_state->with_trace_changes(@trace)
106 my ($self, @to_apply) = @_;
107 my $state = $self->shell_state;
109 foreach my $to_apply (@to_apply) {
110 my ($change, @args) = @$to_apply;
111 ($state, my @this_result) = $state->${\"with_${change}"}(@args);
112 push @Result, @this_result;
114 $self->_set_shell_state($state);
118 sub is_complete_command_string {
119 my ($self, $string) = @_;
120 return !!$self->tcl->icall(info => complete => $string);
123 sub eval_command_string {
124 my ($self, $string) = @_;
127 no warnings 'redefine';
128 local *DX::Utils::trace = $self->shell_state->trace_sub;
129 $self->tcl->Eval($string);
131 push @Result, [ output => $_ ];
134 ($_->[0] eq 'output' and ref($_->[1]))
135 ? [ output => deparse($_->[1]) ]
140 sub apply_predicate {
141 my ($self, $pred, @arg_strings) = @_;
142 die "Can't call predicate ${pred} outside a query\n"
143 unless $self->shell_state->mode eq 'query';
144 my @args = $self->expand_args(@arg_strings);
145 my ($intro, $need) = ({}, {});
146 foreach my $arg (@args) {
148 next if $arg =~ /^\??[a-z]/; # skip globals
149 # ?Foo is intro, Foo is need
150 ($arg =~ s/^\?// ? $intro : $need)->{$arg} = 1;
152 my $prop = DX::Proposition->new(
155 introduced_names => $intro,
156 required_names => $need,
158 my $old_qstate = $self->shell_state->current_query_state;
159 my $qstate = $old_qstate->with_additional_proposition($prop);
160 my $old_application_count = @{
161 $old_qstate->search_state->current_hypothesis->action_applications
163 my @applications = @{
164 $qstate->search_state->current_hypothesis->action_applications
167 map [ output => $_ ],
168 @applications[$old_application_count..$#applications];
169 $self->_set_shell_state(
170 $self->shell_state->but(
171 current_query_state => $qstate