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.IX Title "TAP::Parser::Iterator 3"
.TH TAP::Parser::Iterator 3 "2018-03-19" "perl v5.10.1" "User Contributed Perl Documentation"
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.SH "NAME"
TAP::Parser::Iterator \- Base class for TAP source iterators
.SH "VERSION"
.IX Header "VERSION"
Version 3.42
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 6
\&  # to subclass:
\&  use TAP::Parser::Iterator ();
\&  use base \*(AqTAP::Parser::Iterator\*(Aq;
\&  sub _initialize {
\&    # see TAP::Object...
\&  }
\&
\&  sub next_raw { ... }
\&  sub wait     { ... }
\&  sub exit     { ... }
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This is a simple iterator base class that defines TAP::Parser's iterator
\&\s-1API\s0.  Iterators are typically created from TAP::Parser::SourceHandlers.
.SH "METHODS"
.IX Header "METHODS"
.SS "Class Methods"
.IX Subsection "Class Methods"
\fI\f(CI\*(C`new\*(C'\fI\fR
.IX Subsection "new"
.PP
Create an iterator.  Provided by TAP::Object.
.SS "Instance Methods"
.IX Subsection "Instance Methods"
\fI\f(CI\*(C`next\*(C'\fI\fR
.IX Subsection "next"
.PP
.Vb 1
\& while ( my $item = $iter\->next ) { ... }
.Ve
.PP
Iterate through it, of course.
.PP
\fI\f(CI\*(C`next_raw\*(C'\fI\fR
.IX Subsection "next_raw"
.PP
\&\fBNote:\fR this method is abstract and should be overridden.
.PP
.Vb 1
\& while ( my $item = $iter\->next_raw ) { ... }
.Ve
.PP
Iterate raw input without applying any fixes for quirky input syntax.
.PP
\fI\f(CI\*(C`handle_unicode\*(C'\fI\fR
.IX Subsection "handle_unicode"
.PP
If necessary switch the input stream to handle unicode. This only has
any effect for I/O handle based streams.
.PP
The default implementation does nothing.
.PP
\fI\f(CI\*(C`get_select_handles\*(C'\fI\fR
.IX Subsection "get_select_handles"
.PP
Return a list of filehandles that may be used upstream in a \fIselect()\fR
call to signal that this Iterator is ready. Iterators that are not
handle-based should return an empty list.
.PP
The default implementation does nothing.
.PP
\fI\f(CI\*(C`wait\*(C'\fI\fR
.IX Subsection "wait"
.PP
\&\fBNote:\fR this method is abstract and should be overridden.
.PP
.Vb 1
\& my $wait_status = $iter\->wait;
.Ve
.PP
Return the \f(CW\*(C`wait\*(C'\fR status for this iterator.
.PP
\fI\f(CI\*(C`exit\*(C'\fI\fR
.IX Subsection "exit"
.PP
\&\fBNote:\fR this method is abstract and should be overridden.
.PP
.Vb 1
\& my $wait_status = $iter\->exit;
.Ve
.PP
Return the \f(CW\*(C`exit\*(C'\fR status for this iterator.
.SH "SUBCLASSING"
.IX Header "SUBCLASSING"
Please see \*(L"\s-1SUBCLASSING\s0\*(R" in TAP::Parser for a subclassing overview.
.PP
You must override the abstract methods as noted above.
.SS "Example"
.IX Subsection "Example"
TAP::Parser::Iterator::Array is probably the easiest example to follow.
There's not much point repeating it here.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
TAP::Object,
TAP::Parser,
TAP::Parser::Iterator::Array,
TAP::Parser::Iterator::Stream,
TAP::Parser::Iterator::Process,
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