TAP::Parser::Iterator - Base class for TAP source iterators

Version 3.23

  # to subclass:
  use vars qw(@ISA);
  use TAP::Parser::Iterator ();
  @ISA = qw(TAP::Parser::Iterator);
  sub _initialize {
    # see TAP::Object...
  }

  sub next_raw { ... }
  sub wait     { ... }
  sub exit     { ... }

This is a simple iterator base class that defines TAP::Parser's iterator API. Iterators are typically created from TAP::Parser::SourceHandlers.

Create an iterator. Provided by TAP::Object.

 while ( my $item = $iter->next ) { ... }

Iterate through it, of course.

Note: this method is abstract and should be overridden.

 while ( my $item = $iter->next_raw ) { ... }

Iterate raw input without applying any fixes for quirky input syntax.

If necessary switch the input stream to handle unicode. This only has any effect for I/O handle based streams.

The default implementation does nothing.

Return a list of filehandles that may be used upstream in a select() call to signal that this Iterator is ready. Iterators that are not handle-based should return an empty list.

The default implementation does nothing.

Note: this method is abstract and should be overridden.

 my $wait_status = $iter->wait;

Return the wait status for this iterator.

Note: this method is abstract and should be overridden.

 my $wait_status = $iter->exit;

Return the exit status for this iterator.

Please see SUBCLASSING in TAP::Parser for a subclassing overview.

You must override the abstract methods as noted above.

TAP::Parser::Iterator::Array is probably the easiest example to follow. There's not much point repeating it here.

TAP::Object, TAP::Parser, TAP::Parser::Iterator::Array, TAP::Parser::Iterator::Stream, TAP::Parser::Iterator::Process,