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# (c) Parse::Eyapp Copyright 2006-2008 Casiano Rodriguez-Leon, all rights reserved. |
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package Parse::Eyapp::_TreeregexpSupport; |
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155
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use strict; |
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518
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962
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141
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use Carp; |
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56
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1884
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191
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use Parse::Eyapp::Node; |
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60
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701
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171
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use base qw (Exporter); |
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59
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12998
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our @EXPORT_OK = qw(until_first_match checknumchildren); |
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################### Support routines ######################### |
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# used whith array patterns |
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# index of the children to start |
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# $b recognizer treereg |
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# $r reference to an array where children that don't match are pushed |
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sub until_first_match { |
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83
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0
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my ($father, $order, $b, $r) = @_; |
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83
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362
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return undef unless UNIVERSAL::can($father, 'children'); |
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83
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for ($order..0+$father->children()) { |
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148
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my $t = $father->child($_); |
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148
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100
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return $t if ($b->($t)); |
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push @$r, $t; |
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} |
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return undef; |
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} |
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sub checknumchildren { |
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0
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my ($self, $numexpected, $line, $filename, $there_are_lists, $severity) = @_; |
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my $numchildren = $self->children; |
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return 1 if ($numchildren == $numexpected) or ($there_are_lists and $numchildren >= $numexpected); |
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0
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0
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return 0 unless ($severity > 1); |
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0
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my $class = ref($self); |
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0
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0
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my $clause = $there_are_lists? ' at least' : ''; |
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0
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my $warnmessage =<<"END_OF_WARN_MESSAGE"; |
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found node $class with $numchildren children. |
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Expected$clause $numexpected children (see line $line of $filename)" |
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END_OF_WARN_MESSAGE |
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0
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0
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croak "Error! $warnmessage" if $severity > 2; |
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0
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warn "Warning! $warnmessage"; |
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0
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return 0; |
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} |
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1; |
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__END__ |