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Plugins/Plang: override `print` built-in to collect output

This commit is contained in:
Pragmatic Software 2020-07-18 19:48:05 -07:00
parent 184d6faf8f
commit 38daf04bfa
2 changed files with 24 additions and 3 deletions
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2
Plang

@ -1 +1 @@
Subproject commit 78afb131f474ff191739bbc5101911b3135f0058
Subproject commit 91432db555e7fab5ff2437b954b75731b2602f03

25
Plugins/Plang.pm
View File

@ -19,17 +19,25 @@ use Getopt::Long qw(GetOptionsFromArray);
sub initialize {
my ($self, %conf) = @_;
# load Plang module
my $path = $self->{pbot}->{registry}->get_value('general', 'plang_dir') // 'Plang';
unshift @INC, $path if not grep { $_ eq $path } @INC;
require "$path/Interpreter.pm";
# allow !refresh to reload these modules
$self->{pbot}->{refresher}->{refresher}->update_cache("$path/Interpreter.pm");
$self->{pbot}->{refresher}->{refresher}->update_cache("$path/AstInterpreter.pm");
$self->{pbot}->{refresher}->{refresher}->update_cache("$path/Grammar.pm");
$self->{pbot}->{refresher}->{refresher}->update_cache("$path/Lexer.pm");
$self->{pbot}->{refresher}->{refresher}->update_cache("$path/Parser.pm");
# regset plang.debug 0-10 -- Plugin must be reloaded for this value to take effect.
my $debug = $self->{pbot}->{registry}->get_value('plang', 'debug') // 0;
# create our Plang interpreter object
$self->{plang} = Plang::Interpreter->new(embedded => 1, debug => $debug);
# register some built-in functions
# register some PBot-specific built-in functions
$self->{plang}->{interpreter}->add_function_builtin('factset',
# parameters are [['param1 name', default arg], ['param2 name', default arg], ...]
[['namespace', undef], ['keyword', undef], ['text', undef]],
@ -43,6 +51,11 @@ sub initialize {
[['namespace', undef], ['keyword', undef], ['text', undef]],
sub { $self->append_factoid(@_) });
# override the built-in `print` function to send to our output buffer instead
$self->{plang}->{interpreter}->add_function_builtin('print',
[['stmt', undef], ['end', ['STRING', "\n"]]],
sub { $self->print_override(@_) });
# register the `plang` command
$self->{pbot}->{commands}->register(sub { $self->cmd_plang(@_) }, "plang", 0);
}
@ -88,7 +101,7 @@ sub run {
return if not defined $ast;
# create a new environment for a Plang program
my $context = $self->{plang}->{interpreter}->init_program;
my $context = $self->{plang}->{interpreter}->new_context;
# grab our program's statements
my $program = $ast->[0];
@ -127,6 +140,14 @@ sub run {
return $result; # return result of the final statement
}
# overridden `print` built-in
sub print_override {
my ($self, $plang, $name, $arguments) = @_;
my ($stmt, $end) = ($plang->output_value($arguments->[0]), $arguments->[1]->[1]);
$self->{output} .= "$stmt$end";
return ['NIL', undef];
}
# our custom PBot built-in functions for Plang
sub is_locked {