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package Dispatch::Fu; |
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70592
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use strict; |
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10
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2
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62
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use warnings; |
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53
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use Exporter qw/import/; |
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613
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our $VERSION = q{0.97}; |
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our @EXPORT = qw(dispatch on cases); |
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our @EXPORT_OK = qw(dispatch on cases); |
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my $DISPATCH_TABLE = {}; |
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sub cases () { |
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198
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198
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1
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1834
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return keys %$DISPATCH_TABLE; |
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} |
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sub dispatch (&@) { |
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100
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100
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1
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145
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my $code_ref = shift; # catch sub ref that was coerced from the 'dispatch' BLOCK |
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100
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my $match_ref = shift; # catch the input reference passed after the 'dispatch' BLOCK |
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# build up dispatch table for each k/v pair preceded by 'on' |
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100
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279
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while ( my $key = shift @_ ) { |
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600
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772
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my $HV = shift @_; |
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600
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788
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$DISPATCH_TABLE->{$key} = _to_sub($HV); |
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} |
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# call $code_ref that needs to return a valid bucket name |
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100
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my $key = $code_ref->($match_ref); |
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100
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52143
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die qq{Computed static bucket not found\n} if not $DISPATCH_TABLE->{$key} or 'CODE' ne ref $DISPATCH_TABLE->{$key}; |
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# call subroutine ref defined as the v in the k/v $DISPATCH_TABLE->{$key} slot |
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100
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my $sub_to_call = $DISPATCH_TABLE->{$key}; |
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# reset table |
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100
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276
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$DISPATCH_TABLE = {}; |
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100
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213
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$sub_to_call->(); |
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} |
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# on accumulater, wants h => v pair, where h is a static bucket string and v is a sub ref |
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sub on (@) { |
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600
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600
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1
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102933
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return @_; |
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} |
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46
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# utility sub to force a BLOCK into a sub reference |
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sub _to_sub (&) { |
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600
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600
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1470
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shift; |
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} |
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51
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1; |
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53
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__END__ |