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131 .IX Title "TAP::Parser::Multiplexer 3"
132 .TH TAP::Parser::Multiplexer 3 "2009-05-05" "perl v5.8.7" "User Contributed Perl Documentation"
134 TAP::Parser::Multiplexer \- Multiplex multiple TAP::Parsers
139 .IX Header "SYNOPSIS"
141 \& use TAP::Parser::Multiplexer;
145 \& my $mux = TAP::Parser::Multiplexer\->new;
146 \& $mux\->add( $parser1, $stash1 );
147 \& $mux\->add( $parser2, $stash2 );
148 \& while ( my ( $parser, $stash, $result ) = $mux\->next ) {
153 .IX Header "DESCRIPTION"
154 \&\f(CW\*(C`TAP::Parser::Multiplexer\*(C'\fR gathers input from multiple TAP::Parsers.
155 Internally it calls select on the input file handles for those parsers
156 to wait for one or more of them to have input available.
158 See TAP::Harness for an example of its use.
162 .IX Subsection "Class Methods"
163 \fI\f(CI\*(C`new\*(C'\fI\fR
167 \& my $mux = TAP::Parser::Multiplexer\->new;
170 Returns a new \f(CW\*(C`TAP::Parser::Multiplexer\*(C'\fR object.
171 .Sh "Instance Methods"
172 .IX Subsection "Instance Methods"
173 \fI\f(CI\*(C`add\*(C'\fI\fR
177 \& $mux\->add( $parser, $stash );
180 Add a TAP::Parser to the multiplexer. \f(CW$stash\fR is an optional opaque
181 reference that will be returned from \f(CW\*(C`next\*(C'\fR along with the parser and
184 \fI\f(CI\*(C`parsers\*(C'\fI\fR
185 .IX Subsection "parsers"
188 \& my $count = $mux\->parsers;
191 Returns the number of parsers. Parsers are removed from the multiplexer
192 when their input is exhausted.
194 \fI\f(CI\*(C`next\*(C'\fI\fR
195 .IX Subsection "next"
197 Return a result from the next available parser. Returns a list
198 containing the parser from which the result came, the stash that
199 corresponds with that parser and the result.
202 \& my ( $parser, $stash, $result ) = $mux\->next;
205 If \f(CW$result\fR is undefined the corresponding parser has reached the end
206 of its input (and will automatically be removed from the multiplexer).
208 When all parsers are exhausted an empty list will be returned.
211 \& if ( my ( $parser, $stash, $result ) = $mux\->next ) {
212 \& if ( ! defined $result ) {
213 \& # End of this parser
220 \& # All parsers finished
224 .IX Header "See Also"