Adding upstream version 4.22.0.upstream/4.22.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 243 insertions, 0 deletions

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+.\"
+.\" If the F register is >0, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
+.\" entries marked with X<> in POD.  Of course, you'll have to process the
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+.\" ========================================================================
+.\"
+.IX Title "TAP::Parser::IteratorFactory 3perl"
+.TH TAP::Parser::IteratorFactory 3perl "2023-11-25" "perl v5.36.0" "Perl Programmers Reference Guide"
+.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH "NAME"
+TAP::Parser::IteratorFactory \- Figures out which SourceHandler objects to use for a given Source
+.SH "VERSION"
+.IX Header "VERSION"
+Version 3.44
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+.Vb 3
+\&  use TAP::Parser::IteratorFactory;
+\&  my $factory = TAP::Parser::IteratorFactory\->new({ %config });
+\&  my $iterator  = $factory\->make_iterator( $filename );
+.Ve
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+This is a factory class that takes a TAP::Parser::Source and runs it through all the
+registered TAP::Parser::SourceHandlers to see which one should handle the source.
+.PP
+If you're a plugin author, you'll be interested in how to \*(L"register_handler\*(R"s,
+how \*(L"detect_source\*(R" works.
+.SH "METHODS"
+.IX Header "METHODS"
+.SS "Class Methods"
+.IX Subsection "Class Methods"
+\fI\f(CI\*(C`new\*(C'\fI\fR
+.IX Subsection "new"
+.PP
+Creates a new factory class:
+.PP
+.Vb 1
+\&  my $sf = TAP::Parser::IteratorFactory\->new( $config );
+.Ve
+.PP
+\&\f(CW$config\fR is optional.  If given, sets \*(L"config\*(R" and calls \*(L"load_handlers\*(R".
+.PP
+\fI\f(CI\*(C`register_handler\*(C'\fI\fR
+.IX Subsection "register_handler"
+.PP
+Registers a new TAP::Parser::SourceHandler with this factory.
+.PP
+.Vb 1
+\&  _\|_PACKAGE_\|_\->register_handler( $handler_class );
+.Ve
+.PP
+\fI\f(CI\*(C`handlers\*(C'\fI\fR
+.IX Subsection "handlers"
+.PP
+List of handlers that have been registered.
+.SS "Instance Methods"
+.IX Subsection "Instance Methods"
+\fI\f(CI\*(C`config\*(C'\fI\fR
+.IX Subsection "config"
+.PP
+.Vb 2
+\& my $cfg = $sf\->config;
+\& $sf\->config({ Perl => { %config } });
+.Ve
+.PP
+Chaining getter/setter for the configuration of the available source handlers.
+This is a hashref keyed on handler class whose values contain config to be passed
+onto the handlers during detection & creation.  Class names may be fully qualified
+or abbreviated, eg:
+.PP
+.Vb 3
+\&  # these are equivalent
+\&  $sf\->config({ \*(AqTAP::Parser::SourceHandler::Perl\*(Aq => { %config } });
+\&  $sf\->config({ \*(AqPerl\*(Aq => { %config } });
+.Ve
+.PP
+\fI\f(CI\*(C`load_handlers\*(C'\fI\fR
+.IX Subsection "load_handlers"
+.PP
+.Vb 1
+\& $sf\->load_handlers;
+.Ve
+.PP
+Loads the handler classes defined in \*(L"config\*(R".  For example, given a config:
+.PP
+.Vb 3
+\&  $sf\->config({
+\&    MySourceHandler => { some => \*(Aqconfig\*(Aq },
+\&  });
+.Ve
+.PP
+\&\f(CW\*(C`load_handlers\*(C'\fR will attempt to load the \f(CW\*(C`MySourceHandler\*(C'\fR class by looking in
+\&\f(CW@INC\fR for it in this order:
+.PP
+.Vb 2
+\&  TAP::Parser::SourceHandler::MySourceHandler
+\&  MySourceHandler
+.Ve
+.PP
+\&\f(CW\*(C`croak\*(C'\fRs on error.
+.PP
+\fI\f(CI\*(C`make_iterator\*(C'\fI\fR
+.IX Subsection "make_iterator"
+.PP
+.Vb 1
+\&  my $iterator = $src_factory\->make_iterator( $source );
+.Ve
+.PP
+Given a TAP::Parser::Source, finds the most suitable TAP::Parser::SourceHandler
+to use to create a TAP::Parser::Iterator (see \*(L"detect_source\*(R").  Dies on error.
+.PP
+\fI\f(CI\*(C`detect_source\*(C'\fI\fR
+.IX Subsection "detect_source"
+.PP
+Given a TAP::Parser::Source, detects what kind of source it is and
+returns \fIone\fR TAP::Parser::SourceHandler (the most confident one).  Dies
+on error.
+.PP
+The detection algorithm works something like this:
+.PP
+.Vb 5
+\&  for (@registered_handlers) {
+\&    # ask them how confident they are about handling this source
+\&    $confidence{$handler} = $handler\->can_handle( $source )
+\&  }
+\&  # choose the most confident handler
+.Ve
+.PP
+Ties are handled by choosing the first handler.
+.SH "SUBCLASSING"
+.IX Header "SUBCLASSING"
+Please see \*(L"\s-1SUBCLASSING\*(R"\s0 in TAP::Parser for a subclassing overview.
+.SS "Example"
+.IX Subsection "Example"
+If we've done things right, you'll probably want to write a new source,
+rather than sub-classing this (see TAP::Parser::SourceHandler for that).
+.PP
+But in case you find the need to...
+.PP
+.Vb 1
+\&  package MyIteratorFactory;
+\&
+\&  use strict;
+\&
+\&  use base \*(AqTAP::Parser::IteratorFactory\*(Aq;
+\&
+\&  # override source detection algorithm
+\&  sub detect_source {
+\&    my ($self, $raw_source_ref, $meta) = @_;
+\&    # do detective work, using $meta and whatever else...
+\&  }
+\&
+\&  1;
+.Ve
+.SH "AUTHORS"
+.IX Header "AUTHORS"
+Steve Purkis
+.SH "ATTRIBUTION"
+.IX Header "ATTRIBUTION"
+Originally ripped off from Test::Harness.
+.PP
+Moved out of TAP::Parser & converted to a factory class to support
+extensible \s-1TAP\s0 source detective work by Steve Purkis.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+TAP::Object,
+TAP::Parser,
+TAP::Parser::SourceHandler,
+TAP::Parser::SourceHandler::File,
+TAP::Parser::SourceHandler::Perl,
+TAP::Parser::SourceHandler::RawTAP,
+TAP::Parser::SourceHandler::Handle,
+TAP::Parser::SourceHandler::Executable