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######################################################################## |
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# housekeeping |
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######################################################################## |
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package Keyword::TreeFold v0.1.0; |
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44555
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use v5.20; |
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3
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1787
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use Keyword::Declare; |
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368379
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######################################################################## |
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# package variables |
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######################################################################## |
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######################################################################## |
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# utility subs |
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######################################################################## |
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sub simple_code |
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{ |
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0
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119780
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my $list_op = shift; |
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2
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my $size = @_; |
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qq|\@_ = \ndo $list_op;\n| |
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} |
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sub lexical_code |
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{ |
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66725
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my ( $list_op, @varz ) = @_; |
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29
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my $count = @varz; |
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my $offset = $count - 1; |
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2
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my $lexical = join ',' => @varz; |
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qq |
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my \$last |
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= \@_ % $count |
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? int( \@_ / $count ) |
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: int( \@_ / $count ) - 1 |
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; |
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\@_ |
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= map |
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{ |
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my ( $lexical ) = \@_[ \$_ .. \$_ + $offset ]; |
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do |
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###### |
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$list_op |
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###### |
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} |
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map |
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{ |
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\$_ * $count |
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} |
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( 0 .. \$last ); |
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57
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58
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} |
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59
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60
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sub boilerplate |
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{ |
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4
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0
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my ( $name, $guts ) = @_; |
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64
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<<"SUBDEF" |
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sub $name |
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{ |
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67
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use Carp qw( croak ); |
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69
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\@_ > 1 or return \$_[0]; |
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70
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71
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my \$size = \@_; |
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73
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$guts |
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75
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croak "Stack not shrinking: \$size elements." |
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76
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unless \@_ < \$size; |
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77
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78
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goto __SUB__ |
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79
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} |
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80
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SUBDEF |
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81
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4
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11
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} |
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83
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######################################################################## |
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84
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# delcare keywords |
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85
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######################################################################## |
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86
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87
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sub import |
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88
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3
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22
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{ |
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89
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3
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50
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50
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3
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91937
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keyword tree_fold( Ident $name, List $argz, Block $list_op ) |
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3
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41
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3
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10
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90
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{ |
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91
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my @varz |
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92
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= map |
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93
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{ |
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94
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$_->isa( 'PPI::Token::Symbol' ) |
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95
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? $_->{ content } |
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: () |
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} |
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98
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map |
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{ |
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100
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$_->isa( 'PPI::Statement::Expression' ) |
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? @{ $_->{ children } } |
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102
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: () |
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103
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} |
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104
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@{ $argz->{ children } }; |
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105
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106
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if( @varz > 1 ) |
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107
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{ |
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108
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boilerplate $name, lexical_code "$list_op", @varz |
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} |
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110
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elsif( @varz ) |
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{ |
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112
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die |
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"Bogus tree_fold: '$name' with single variable '$varz[0]'."; |
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} |
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115
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else |
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{ |
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117
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boilerplate $name, simple_code "$list_op" |
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} |
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119
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} |
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120
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3
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148
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121
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3
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50
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3
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25099
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keyword tree_fold( Ident $name, Block $list_op ) |
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3
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31
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3
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8
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122
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{ |
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123
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boilerplate $name, simple_code "$list_op"; |
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124
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} |
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125
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} |
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127
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1 |
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__END__ |