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.\"
.IX Title "Pandoc::Filter::Lazy 3pm"
.TH Pandoc::Filter::Lazy 3pm "2017-01-10" "perl v5.24.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Pandoc::Filter::Lazy \- facilitate creation of filters
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 9
\&  my $filter = Pandoc::Filter::Lazy\->new(
\&      \*(AqHeader => sub { Header $_\->level, [ Str $_\->string ] }\*(Aq
\&  );
\&  if ( $filter\->error ) {
\&      say STDERR $lazy\->error;
\&      say STDERR $lazy\->code;
\&  } else {
\&      $filter\->apply(...)
\&  }
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This module helps creation of Pandoc::Filter with arguments given as string.
The following should result in equivalent filters:
.PP
.Vb 2
\&  Pandoc::Walker::action( ... );     #  ...  as code
\&  Pandoc::Filter::Lazy\->new( \*(Aq...\*(Aq ) # \*(Aq...\*(Aq as string
.Ve
.PP
The script passed as only argument is tried to convert to valid Perl by escaping
selectors and adding a missing \f(CW\*(C`sub { ... }"\*(C'\fR, for instance
.PP
.Vb 1
\&  Code|CodeBlock => say $_\->class
.Ve
.PP
Is converted to
.PP
.Vb 1
\&  \*(AqCode|CodeBlock\*(Aq => sub { say $_\->class }
.Ve
.SH "METHODS"
.IX Header "METHODS"
In addition to the methods inherited from Pandoc::Filter:
.SS "error"
.IX Subsection "error"
Return an error message if compilation of the filter failed.
.SS "script"
.IX Subsection "script"
Return the (possibly cleaned) script arguments to create the filter.
.ie n .SS "code( [ indent => $indent, ] [ function => $function ] )"
.el .SS "code( [ indent => \f(CW$indent\fP, ] [ function => \f(CW$function\fP ] )"
.IX Subsection "code( [ indent => $indent, ] [ function => $function ] )"
Return a string of Perl code that can be used to create the same filter.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
This module is used in command line scripts pandocwalk and pod2pandoc.