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1
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package Perl::Lint::Policy::CodeLayout::ProhibitParensWithBuiltins; |
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2
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134
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134
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104506
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use strict; |
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134
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361
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134
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5323
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3
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134
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134
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606
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use warnings; |
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134
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297
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134
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4558
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4
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134
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134
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1162
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use Perl::Lint::Constants::Type; |
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134
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214
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134
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87026
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5
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134
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134
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48537
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use Perl::Lint::Constants::Kind; |
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134
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275
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134
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9478
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6
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134
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134
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728
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use parent "Perl::Lint::Policy"; |
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134
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228
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134
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585
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7
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8
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use constant { |
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9
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134
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71117
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DESC => 'Builtin function called with parentheses', |
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10
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EXPL => [13], |
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11
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134
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134
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8186
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}; |
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134
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227
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12
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13
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my %named_unary_ops = ( |
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14
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alarm => 1, |
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15
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glob => 1, |
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16
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rand => 1, |
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17
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caller => 1, |
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18
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gmtime => 1, |
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19
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readlink => 1, |
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20
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chdir => 1, |
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21
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hex => 1, |
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22
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ref => 1, |
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23
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chroot => 1, |
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24
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int => 1, |
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25
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require => 1, |
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26
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cos => 1, |
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27
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lc => 1, |
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28
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return => 1, |
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29
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defined => 1, |
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30
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lcfirst => 1, |
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31
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rmdir => 1, |
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32
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delete => 1, |
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33
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length => 1, |
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34
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scalar => 1, |
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35
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do => 1, |
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36
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localtime => 1, |
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37
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sin => 1, |
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38
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eval => 1, |
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39
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lock => 1, |
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40
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sleep => 1, |
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41
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exists => 1, |
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42
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log => 1, |
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43
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sqrt => 1, |
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44
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exit => 1, |
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45
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lstat => 1, |
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46
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srand => 1, |
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47
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getgrp => 1, |
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48
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my => 1, |
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49
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stat => 1, |
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50
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gethostbyname => 1, |
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51
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oct => 1, |
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52
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uc => 1, |
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53
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getnetbyname => 1, |
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54
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ord => 1, |
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55
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ucfirst => 1, |
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56
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getprotobyname => 1, |
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57
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quotemeta => 1, |
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58
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umask => 1, |
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59
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undef => 1, |
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60
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sort => 1, |
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61
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); |
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62
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63
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sub evaluate { |
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64
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15
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15
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0
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42
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my ($class, $file, $tokens, $src, $args) = @_; |
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65
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66
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15
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19
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my @violations; |
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67
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15
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56
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for (my $i = 0; my $token = $tokens->[$i]; $i++) { |
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68
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362
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326
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my $token_type = $token->{type}; |
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69
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70
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362
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100
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890
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if ($token_type == BUILTIN_FUNC) { |
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71
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46
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57
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my $func = $token->{data}; |
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72
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73
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46
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53
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$token = $tokens->[++$i]; |
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74
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46
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100
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138
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if ($token->{type} == LEFT_PAREN) { |
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75
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# for unary operators with parens |
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76
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36
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100
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73
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if ($named_unary_ops{$func}) { |
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77
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20
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24
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$token = $tokens->[++$i]; |
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78
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79
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20
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100
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36
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if ($token->{type} == RIGHT_PAREN) { # no args |
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80
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3
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8
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push @violations, { |
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81
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filename => $file, |
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82
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line => $token->{line}, |
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83
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description => DESC, |
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84
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explanation => EXPL, |
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85
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policy => __PACKAGE__, |
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86
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}; |
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87
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3
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8
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next; |
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88
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} |
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89
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90
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17
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21
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my $left_paren_num = 1; |
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91
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17
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35
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for (; my $token = $tokens->[$i]; $i++) { |
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92
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56
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59
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my $token_type = $token->{type}; |
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93
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94
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56
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100
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147
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if ($token_type == LEFT_PAREN) { |
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100
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50
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95
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3
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10
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$left_paren_num++; |
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96
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} |
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97
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elsif ($token_type == RIGHT_PAREN) { |
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98
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20
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100
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45
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last if --$left_paren_num <= 0; |
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99
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} |
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100
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elsif ($token_type == COMMA) { |
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101
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0
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0
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push @violations, { |
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102
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filename => $file, |
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103
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line => $token->{line}, |
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104
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description => DESC, |
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105
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explanation => EXPL, |
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106
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policy => __PACKAGE__, |
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107
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}; |
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108
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0
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0
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last; |
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109
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} |
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110
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} |
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111
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17
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42
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next; |
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112
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} |
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113
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114
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16
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18
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my $is_op_in_arg = 0; |
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115
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16
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13
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my $left_paren_num = 1; |
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116
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16
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36
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for ($i++; my $token = $tokens->[$i]; $i++) { |
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117
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113
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108
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my $token_type = $token->{type}; |
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118
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119
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113
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100
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66
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461
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if ($token_type == LEFT_PAREN) { |
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100
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100
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120
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7
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15
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$left_paren_num++; |
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121
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} |
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122
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elsif ($token_type == RIGHT_PAREN) { |
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123
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23
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100
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52
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last if --$left_paren_num <= 0; |
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124
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} |
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125
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elsif ($token_type == ASSIGN || $token->{kind} == KIND_OP) { |
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126
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1
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3
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$is_op_in_arg = 1; |
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127
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} |
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128
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} |
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129
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130
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16
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100
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31
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if ($is_op_in_arg) { |
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131
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1
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4
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next; |
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132
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} |
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133
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134
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15
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18
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$token = $tokens->[++$i]; |
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135
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15
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21
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my $token_data = $token->{data}; |
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136
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15
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100
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100
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102
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if ( |
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100
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66
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33
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137
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$token->{type} == COMMA || |
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138
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( |
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139
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$token->{kind} == KIND_OP && |
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140
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$token_data ne 'and' && # XXX enough? |
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141
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$token_data ne 'or' && # for low-precedence operator |
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142
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$token_data ne 'xor' # |
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143
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) |
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144
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) { |
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145
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5
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13
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next; |
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146
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} |
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147
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148
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10
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58
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push @violations, { |
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149
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filename => $file, |
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150
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line => $token->{line}, |
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151
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description => DESC, |
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152
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explanation => EXPL, |
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153
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policy => __PACKAGE__, |
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154
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}; |
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155
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} |
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156
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} |
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157
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} |
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158
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159
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15
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166
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return \@violations; |
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160
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} |
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161
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162
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1; |