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+ <span class="siteSubtitle">Run on Thu May 31 16:49:15 2012<br />Reported on Thu May 31 16:56:11 2012</span>
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+<div style="position: absolute; left: 0px; top: 92%; width: 100%; height: 9%; z-index: -1; background-color: rgb(1, 73, 192); "></div>
+<div style="position: absolute; left: 0px; top: 94%; width: 100%; height: 7%; z-index: -1; background-color: rgb(1, 72, 191); "></div>
+<div style="position: absolute; left: 0px; top: 96%; width: 100%; height: 5%; z-index: -1; background-color: rgb(0, 70, 189); "></div>
+<div style="position: absolute; left: 0px; top: 98%; width: 100%; height: 3%; z-index: -1; background-color: rgb(0, 69, 188); "></div>
+<div style="position: absolute; left: 0px; top: 100%; width: 100%; height: 1%; z-index: -1; background-color: rgb(0, 68, 187); "></div>
+</div>
+
+<div class="body_content"><br />
+<table class="file_summary"><tr><td class="h">Filename</td><td align="left"><a href="file:///opt/local/lib/perl5/5.14.2/feature.pm">/opt/local/lib/perl5/5.14.2/feature.pm</a></td></tr>
+<tr><td class="h">Statements</td><td align="left">Executed 38 statements in 64µs</td></tr></table>
+
+ <table id="subs_table" border="1" cellpadding="0" class="tablesorter">
+ <caption>Subroutines</caption>
+ <thead>
+ <tr>
+ <th>Calls</th>
+ <th><span title="Number of Places sub is called from">P</span></th>
+ <th><span title="Number of Files sub is called from">F</span></th>
+ <th>Exclusive<br />Time</th>
+ <th>Inclusive<br />Time</th>
+ <th>Subroutine</th>
+ </tr>
+ </thead>
+ <tbody>
+<tr><td class="c3">2</td><td class="c3">2</td><td class="c3">2</td><td class="c3"><span title="0.0%">33µs</span></td><td class="c3"><span title="0.0%">33µs</span></td><td class="sub_name"><span style="display: none;">feature::::import</span>feature::<a href="feature-pm-2012-line.html#173">import</a></span></td></tr>
+<tr><td class="c3">0</td><td class="c3">0</td><td class="c3">0</td><td class="c3"><span title="0.0%">0s</span></td><td class="c3"><span title="0.0%">0s</span></td><td class="sub_name"><span style="display: none;">feature::::croak</span>feature::<a href="feature-pm-2012-line.html#244">croak</a></span></td></tr>
+<tr><td class="c3">0</td><td class="c3">0</td><td class="c3">0</td><td class="c3"><span title="0.0%">0s</span></td><td class="c3"><span title="0.0%">0s</span></td><td class="sub_name"><span style="display: none;">feature::::unimport</span>feature::<a href="feature-pm-2012-line.html#199">unimport</a></span></td></tr>
+<tr><td class="c3">0</td><td class="c3">0</td><td class="c3">0</td><td class="c3"><span title="0.0%">0s</span></td><td class="c3"><span title="0.0%">0s</span></td><td class="sub_name"><span style="display: none;">feature::::unknown_feature</span>feature::<a href="feature-pm-2012-line.html#232">unknown_feature</a></span></td></tr>
+<tr><td class="c3">0</td><td class="c3">0</td><td class="c3">0</td><td class="c3"><span title="0.0%">0s</span></td><td class="c3"><span title="0.0%">0s</span></td><td class="sub_name"><span style="display: none;">feature::::unknown_feature_bundle</span>feature::<a href="feature-pm-2012-line.html#238">unknown_feature_bundle</a></span></td></tr>
+</tbody></table>
+ Call graph for these subroutines as a
+ <a href="http://en.wikipedia.org/wiki/Graphviz">Graphviz</a>
+ <a href="opt-local-lib-perl5-5-14-2-feature-pm.dot">dot language file</a>.
+
+ <table border="1" cellpadding="0">
+ <thead>
+ <tr><th>Line</th>
+ <th><span title="Number of statements executed">State<br />ments</span></th>
+ <th><span title="Time spend executing statements on the line,
+ excluding time spent executing statements in any called subroutines">Time<br />on line</span></th>
+ <th><span title="Number of subroutines calls">Calls</span></th>
+ <th><span title="Time spent in subroutines called (inclusive)">Time<br />in subs</span></th>
+ <th class="left_indent_header">Code</th>
+ </tr>
+
+ </thead>
+ <tbody>
+ <tr><td class="h"><a name="1"></a>1</td><td></td><td></td><td></td><td></td><td class="s">package feature;</td></tr>
+<tr><td class="h"><a name="2"></a>2</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="3"></a>3</td><td class="c3">1</td><td class="c3"><span title="Avg 600ns">600ns</span></td><td></td><td></td><td class="s">our $VERSION = '1.20';</td></tr>
+<tr><td class="h"><a name="4"></a>4</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="5"></a>5</td><td></td><td></td><td></td><td></td><td class="s"># (feature name) => (internal name, used in %^H)</td></tr>
+<tr><td class="h"><a name="6"></a>6</td><td class="c3">1</td><td class="c1"><span title="Avg 3µs">3µs</span></td><td></td><td></td><td class="s">my %feature = (</td></tr>
+<tr><td class="h"><a name="7"></a>7</td><td></td><td></td><td></td><td></td><td class="s"> switch => 'feature_switch',</td></tr>
+<tr><td class="h"><a name="8"></a>8</td><td></td><td></td><td></td><td></td><td class="s"> say => "feature_say",</td></tr>
+<tr><td class="h"><a name="9"></a>9</td><td></td><td></td><td></td><td></td><td class="s"> state => "feature_state",</td></tr>
+<tr><td class="h"><a name="10"></a>10</td><td></td><td></td><td></td><td></td><td class="s"> unicode_strings => "feature_unicode",</td></tr>
+<tr><td class="h"><a name="11"></a>11</td><td></td><td></td><td></td><td></td><td class="s">);</td></tr>
+<tr><td class="h"><a name="12"></a>12</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="13"></a>13</td><td></td><td></td><td></td><td></td><td class="s"># This gets set (for now) in $^H as well as in %^H,</td></tr>
+<tr><td class="h"><a name="14"></a>14</td><td></td><td></td><td></td><td></td><td class="s"># for runtime speed of the uc/lc/ucfirst/lcfirst functions.</td></tr>
+<tr><td class="h"><a name="15"></a>15</td><td></td><td></td><td></td><td></td><td class="s"># See HINT_UNI_8_BIT in perl.h.</td></tr>
+<tr><td class="h"><a name="16"></a>16</td><td class="c3">1</td><td class="c3"><span title="Avg 100ns">100ns</span></td><td></td><td></td><td class="s">our $hint_uni8bit = 0x00000800;</td></tr>
+<tr><td class="h"><a name="17"></a>17</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="18"></a>18</td><td></td><td></td><td></td><td></td><td class="s"># NB. the latest bundle must be loaded by the -E switch (see toke.c)</td></tr>
+<tr><td class="h"><a name="19"></a>19</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="20"></a>20</td><td class="c3">1</td><td class="c0"><span title="Avg 10µs">10µs</span></td><td></td><td></td><td class="s">my %feature_bundle = (</td></tr>
+<tr><td class="h"><a name="21"></a>21</td><td></td><td></td><td></td><td></td><td class="s"> "5.10" => [qw(switch say state)],</td></tr>
+<tr><td class="h"><a name="22"></a>22</td><td></td><td></td><td></td><td></td><td class="s"> "5.11" => [qw(switch say state unicode_strings)],</td></tr>
+<tr><td class="h"><a name="23"></a>23</td><td></td><td></td><td></td><td></td><td class="s"> "5.12" => [qw(switch say state unicode_strings)],</td></tr>
+<tr><td class="h"><a name="24"></a>24</td><td></td><td></td><td></td><td></td><td class="s"> "5.13" => [qw(switch say state unicode_strings)],</td></tr>
+<tr><td class="h"><a name="25"></a>25</td><td></td><td></td><td></td><td></td><td class="s"> "5.14" => [qw(switch say state unicode_strings)],</td></tr>
+<tr><td class="h"><a name="26"></a>26</td><td></td><td></td><td></td><td></td><td class="s">);</td></tr>
+<tr><td class="h"><a name="27"></a>27</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="28"></a>28</td><td></td><td></td><td></td><td></td><td class="s"># special case</td></tr>
+<tr><td class="h"><a name="29"></a>29</td><td class="c3">1</td><td class="c3"><span title="Avg 600ns">600ns</span></td><td></td><td></td><td class="s">$feature_bundle{"5.9.5"} = $feature_bundle{"5.10"};</td></tr>
+<tr><td class="h"><a name="30"></a>30</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="31"></a>31</td><td></td><td></td><td></td><td></td><td class="s"># TODO:</td></tr>
+<tr><td class="h"><a name="32"></a>32</td><td></td><td></td><td></td><td></td><td class="s"># - think about versioned features (use feature switch => 2)</td></tr>
+<tr><td class="h"><a name="33"></a>33</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="34"></a>34</td><td></td><td></td><td></td><td></td><td class="s">=head1 NAME</td></tr>
+<tr><td class="h"><a name="35"></a>35</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="36"></a>36</td><td></td><td></td><td></td><td></td><td class="s">feature - Perl pragma to enable new features</td></tr>
+<tr><td class="h"><a name="37"></a>37</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="38"></a>38</td><td></td><td></td><td></td><td></td><td class="s">=head1 SYNOPSIS</td></tr>
+<tr><td class="h"><a name="39"></a>39</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="40"></a>40</td><td></td><td></td><td></td><td></td><td class="s"> use feature qw(switch say);</td></tr>
+<tr><td class="h"><a name="41"></a>41</td><td></td><td></td><td></td><td></td><td class="s"> given ($foo) {</td></tr>
+<tr><td class="h"><a name="42"></a>42</td><td></td><td></td><td></td><td></td><td class="s"> when (1) { say "\$foo == 1" }</td></tr>
+<tr><td class="h"><a name="43"></a>43</td><td></td><td></td><td></td><td></td><td class="s"> when ([2,3]) { say "\$foo == 2 || \$foo == 3" }</td></tr>
+<tr><td class="h"><a name="44"></a>44</td><td></td><td></td><td></td><td></td><td class="s"> when (/^a[bc]d$/) { say "\$foo eq 'abd' || \$foo eq 'acd'" }</td></tr>
+<tr><td class="h"><a name="45"></a>45</td><td></td><td></td><td></td><td></td><td class="s"> when ($_ > 100) { say "\$foo > 100" }</td></tr>
+<tr><td class="h"><a name="46"></a>46</td><td></td><td></td><td></td><td></td><td class="s"> default { say "None of the above" }</td></tr>
+<tr><td class="h"><a name="47"></a>47</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
+<tr><td class="h"><a name="48"></a>48</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="49"></a>49</td><td></td><td></td><td></td><td></td><td class="s"> use feature ':5.10'; # loads all features available in perl 5.10</td></tr>
+<tr><td class="h"><a name="50"></a>50</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="51"></a>51</td><td></td><td></td><td></td><td></td><td class="s">=head1 DESCRIPTION</td></tr>
+<tr><td class="h"><a name="52"></a>52</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="53"></a>53</td><td></td><td></td><td></td><td></td><td class="s">It is usually impossible to add new syntax to Perl without breaking</td></tr>
+<tr><td class="h"><a name="54"></a>54</td><td></td><td></td><td></td><td></td><td class="s">some existing programs. This pragma provides a way to minimize that</td></tr>
+<tr><td class="h"><a name="55"></a>55</td><td></td><td></td><td></td><td></td><td class="s">risk. New syntactic constructs, or new semantic meanings to older</td></tr>
+<tr><td class="h"><a name="56"></a>56</td><td></td><td></td><td></td><td></td><td class="s">constructs, can be enabled by C<use feature 'foo'>, and will be parsed</td></tr>
+<tr><td class="h"><a name="57"></a>57</td><td></td><td></td><td></td><td></td><td class="s">only when the appropriate feature pragma is in scope.</td></tr>
+<tr><td class="h"><a name="58"></a>58</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="59"></a>59</td><td></td><td></td><td></td><td></td><td class="s">=head2 Lexical effect</td></tr>
+<tr><td class="h"><a name="60"></a>60</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="61"></a>61</td><td></td><td></td><td></td><td></td><td class="s">Like other pragmas (C<use strict>, for example), features have a lexical</td></tr>
+<tr><td class="h"><a name="62"></a>62</td><td></td><td></td><td></td><td></td><td class="s">effect. C<use feature qw(foo)> will only make the feature "foo" available</td></tr>
+<tr><td class="h"><a name="63"></a>63</td><td></td><td></td><td></td><td></td><td class="s">from that point to the end of the enclosing block.</td></tr>
+<tr><td class="h"><a name="64"></a>64</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="65"></a>65</td><td></td><td></td><td></td><td></td><td class="s"> {</td></tr>
+<tr><td class="h"><a name="66"></a>66</td><td></td><td></td><td></td><td></td><td class="s"> use feature 'say';</td></tr>
+<tr><td class="h"><a name="67"></a>67</td><td></td><td></td><td></td><td></td><td class="s"> say "say is available here";</td></tr>
+<tr><td class="h"><a name="68"></a>68</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
+<tr><td class="h"><a name="69"></a>69</td><td></td><td></td><td></td><td></td><td class="s"> print "But not here.\n";</td></tr>
+<tr><td class="h"><a name="70"></a>70</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="71"></a>71</td><td></td><td></td><td></td><td></td><td class="s">=head2 C<no feature></td></tr>
+<tr><td class="h"><a name="72"></a>72</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="73"></a>73</td><td></td><td></td><td></td><td></td><td class="s">Features can also be turned off by using C<no feature "foo">. This too</td></tr>
+<tr><td class="h"><a name="74"></a>74</td><td></td><td></td><td></td><td></td><td class="s">has lexical effect.</td></tr>
+<tr><td class="h"><a name="75"></a>75</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="76"></a>76</td><td></td><td></td><td></td><td></td><td class="s"> use feature 'say';</td></tr>
+<tr><td class="h"><a name="77"></a>77</td><td></td><td></td><td></td><td></td><td class="s"> say "say is available here";</td></tr>
+<tr><td class="h"><a name="78"></a>78</td><td></td><td></td><td></td><td></td><td class="s"> {</td></tr>
+<tr><td class="h"><a name="79"></a>79</td><td></td><td></td><td></td><td></td><td class="s"> no feature 'say';</td></tr>
+<tr><td class="h"><a name="80"></a>80</td><td></td><td></td><td></td><td></td><td class="s"> print "But not here.\n";</td></tr>
+<tr><td class="h"><a name="81"></a>81</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
+<tr><td class="h"><a name="82"></a>82</td><td></td><td></td><td></td><td></td><td class="s"> say "Yet it is here.";</td></tr>
+<tr><td class="h"><a name="83"></a>83</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="84"></a>84</td><td></td><td></td><td></td><td></td><td class="s">C<no feature> with no features specified will turn off all features.</td></tr>
+<tr><td class="h"><a name="85"></a>85</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="86"></a>86</td><td></td><td></td><td></td><td></td><td class="s">=head2 The 'switch' feature</td></tr>
+<tr><td class="h"><a name="87"></a>87</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="88"></a>88</td><td></td><td></td><td></td><td></td><td class="s">C<use feature 'switch'> tells the compiler to enable the Perl 6</td></tr>
+<tr><td class="h"><a name="89"></a>89</td><td></td><td></td><td></td><td></td><td class="s">given/when construct.</td></tr>
+<tr><td class="h"><a name="90"></a>90</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="91"></a>91</td><td></td><td></td><td></td><td></td><td class="s">See L<perlsyn/"Switch statements"> for details.</td></tr>
+<tr><td class="h"><a name="92"></a>92</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="93"></a>93</td><td></td><td></td><td></td><td></td><td class="s">=head2 The 'say' feature</td></tr>
+<tr><td class="h"><a name="94"></a>94</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="95"></a>95</td><td></td><td></td><td></td><td></td><td class="s">C<use feature 'say'> tells the compiler to enable the Perl 6</td></tr>
+<tr><td class="h"><a name="96"></a>96</td><td></td><td></td><td></td><td></td><td class="s">C<say> function.</td></tr>
+<tr><td class="h"><a name="97"></a>97</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="98"></a>98</td><td></td><td></td><td></td><td></td><td class="s">See L<perlfunc/say> for details.</td></tr>
+<tr><td class="h"><a name="99"></a>99</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="100"></a>100</td><td></td><td></td><td></td><td></td><td class="s">=head2 the 'state' feature</td></tr>
+<tr><td class="h"><a name="101"></a>101</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="102"></a>102</td><td></td><td></td><td></td><td></td><td class="s">C<use feature 'state'> tells the compiler to enable C<state></td></tr>
+<tr><td class="h"><a name="103"></a>103</td><td></td><td></td><td></td><td></td><td class="s">variables.</td></tr>
+<tr><td class="h"><a name="104"></a>104</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="105"></a>105</td><td></td><td></td><td></td><td></td><td class="s">See L<perlsub/"Persistent Private Variables"> for details.</td></tr>
+<tr><td class="h"><a name="106"></a>106</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="107"></a>107</td><td></td><td></td><td></td><td></td><td class="s">=head2 the 'unicode_strings' feature</td></tr>
+<tr><td class="h"><a name="108"></a>108</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="109"></a>109</td><td></td><td></td><td></td><td></td><td class="s">C<use feature 'unicode_strings'> tells the compiler to use Unicode semantics</td></tr>
+<tr><td class="h"><a name="110"></a>110</td><td></td><td></td><td></td><td></td><td class="s">in all string operations executed within its scope (unless they are also</td></tr>
+<tr><td class="h"><a name="111"></a>111</td><td></td><td></td><td></td><td></td><td class="s">within the scope of either C<use locale> or C<use bytes>). The same applies</td></tr>
+<tr><td class="h"><a name="112"></a>112</td><td></td><td></td><td></td><td></td><td class="s">to all regular expressions compiled within the scope, even if executed outside</td></tr>
+<tr><td class="h"><a name="113"></a>113</td><td></td><td></td><td></td><td></td><td class="s">it.</td></tr>
+<tr><td class="h"><a name="114"></a>114</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="115"></a>115</td><td></td><td></td><td></td><td></td><td class="s">C<no feature 'unicode_strings'> tells the compiler to use the traditional</td></tr>
+<tr><td class="h"><a name="116"></a>116</td><td></td><td></td><td></td><td></td><td class="s">Perl semantics wherein the native character set semantics is used unless it is</td></tr>
+<tr><td class="h"><a name="117"></a>117</td><td></td><td></td><td></td><td></td><td class="s">clear to Perl that Unicode is desired. This can lead to some surprises</td></tr>
+<tr><td class="h"><a name="118"></a>118</td><td></td><td></td><td></td><td></td><td class="s">when the behavior suddenly changes. (See</td></tr>
+<tr><td class="h"><a name="119"></a>119</td><td></td><td></td><td></td><td></td><td class="s">L<perlunicode/The "Unicode Bug"> for details.) For this reason, if you are</td></tr>
+<tr><td class="h"><a name="120"></a>120</td><td></td><td></td><td></td><td></td><td class="s">potentially using Unicode in your program, the</td></tr>
+<tr><td class="h"><a name="121"></a>121</td><td></td><td></td><td></td><td></td><td class="s">C<use feature 'unicode_strings'> subpragma is B<strongly> recommended.</td></tr>
+<tr><td class="h"><a name="122"></a>122</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="123"></a>123</td><td></td><td></td><td></td><td></td><td class="s">This subpragma is available starting with Perl 5.11.3, but was not fully</td></tr>
+<tr><td class="h"><a name="124"></a>124</td><td></td><td></td><td></td><td></td><td class="s">implemented until 5.13.8.</td></tr>
+<tr><td class="h"><a name="125"></a>125</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="126"></a>126</td><td></td><td></td><td></td><td></td><td class="s">=head1 FEATURE BUNDLES</td></tr>
+<tr><td class="h"><a name="127"></a>127</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="128"></a>128</td><td></td><td></td><td></td><td></td><td class="s">It's possible to load a whole slew of features in one go, using</td></tr>
+<tr><td class="h"><a name="129"></a>129</td><td></td><td></td><td></td><td></td><td class="s">a I<feature bundle>. The name of a feature bundle is prefixed with</td></tr>
+<tr><td class="h"><a name="130"></a>130</td><td></td><td></td><td></td><td></td><td class="s">a colon, to distinguish it from an actual feature. At present, the</td></tr>
+<tr><td class="h"><a name="131"></a>131</td><td></td><td></td><td></td><td></td><td class="s">only feature bundle is C<use feature ":5.10"> which is equivalent</td></tr>
+<tr><td class="h"><a name="132"></a>132</td><td></td><td></td><td></td><td></td><td class="s">to C<use feature qw(switch say state)>.</td></tr>
+<tr><td class="h"><a name="133"></a>133</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="134"></a>134</td><td></td><td></td><td></td><td></td><td class="s">Specifying sub-versions such as the C<0> in C<5.10.0> in feature bundles has</td></tr>
+<tr><td class="h"><a name="135"></a>135</td><td></td><td></td><td></td><td></td><td class="s">no effect: feature bundles are guaranteed to be the same for all sub-versions.</td></tr>
+<tr><td class="h"><a name="136"></a>136</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="137"></a>137</td><td></td><td></td><td></td><td></td><td class="s">=head1 IMPLICIT LOADING</td></tr>
+<tr><td class="h"><a name="138"></a>138</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="139"></a>139</td><td></td><td></td><td></td><td></td><td class="s">There are two ways to load the C<feature> pragma implicitly :</td></tr>
+<tr><td class="h"><a name="140"></a>140</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="141"></a>141</td><td></td><td></td><td></td><td></td><td class="s">=over 4</td></tr>
+<tr><td class="h"><a name="142"></a>142</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="143"></a>143</td><td></td><td></td><td></td><td></td><td class="s">=item *</td></tr>
+<tr><td class="h"><a name="144"></a>144</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="145"></a>145</td><td></td><td></td><td></td><td></td><td class="s">By using the C<-E> switch on the command-line instead of C<-e>. It enables</td></tr>
+<tr><td class="h"><a name="146"></a>146</td><td></td><td></td><td></td><td></td><td class="s">all available features in the main compilation unit (that is, the one-liner.)</td></tr>
+<tr><td class="h"><a name="147"></a>147</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="148"></a>148</td><td></td><td></td><td></td><td></td><td class="s">=item *</td></tr>
+<tr><td class="h"><a name="149"></a>149</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="150"></a>150</td><td></td><td></td><td></td><td></td><td class="s">By requiring explicitly a minimal Perl version number for your program, with</td></tr>
+<tr><td class="h"><a name="151"></a>151</td><td></td><td></td><td></td><td></td><td class="s">the C<use VERSION> construct, and when the version is higher than or equal to</td></tr>
+<tr><td class="h"><a name="152"></a>152</td><td></td><td></td><td></td><td></td><td class="s">5.10.0. That is,</td></tr>
+<tr><td class="h"><a name="153"></a>153</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="154"></a>154</td><td></td><td></td><td></td><td></td><td class="s"> use 5.10.0;</td></tr>
+<tr><td class="h"><a name="155"></a>155</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="156"></a>156</td><td></td><td></td><td></td><td></td><td class="s">will do an implicit</td></tr>
+<tr><td class="h"><a name="157"></a>157</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="158"></a>158</td><td></td><td></td><td></td><td></td><td class="s"> use feature ':5.10';</td></tr>
+<tr><td class="h"><a name="159"></a>159</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="160"></a>160</td><td></td><td></td><td></td><td></td><td class="s">and so on. Note how the trailing sub-version is automatically stripped from the</td></tr>
+<tr><td class="h"><a name="161"></a>161</td><td></td><td></td><td></td><td></td><td class="s">version.</td></tr>
+<tr><td class="h"><a name="162"></a>162</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="163"></a>163</td><td></td><td></td><td></td><td></td><td class="s">But to avoid portability warnings (see L<perlfunc/use>), you may prefer:</td></tr>
+<tr><td class="h"><a name="164"></a>164</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="165"></a>165</td><td></td><td></td><td></td><td></td><td class="s"> use 5.010;</td></tr>
+<tr><td class="h"><a name="166"></a>166</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="167"></a>167</td><td></td><td></td><td></td><td></td><td class="s">with the same effect.</td></tr>
+<tr><td class="h"><a name="168"></a>168</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="169"></a>169</td><td></td><td></td><td></td><td></td><td class="s">=back</td></tr>
+<tr><td class="h"><a name="170"></a>170</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="171"></a>171</td><td></td><td></td><td></td><td></td><td class="s">=cut</td></tr>
+<tr><td class="h"><a name="172"></a>172</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="173"></a>173</td><td></td><td></td><td></td><td></td><td class="s"><div class="calls"><div class="calls_in"># spent 33µs within feature::import which was called 2 times, avg 16µs/call:
+# once (23µs+0s) by SelfLoader::BEGIN@1.22 at <a href="(eval 1840)[SelfLoader-pm-12]-2492-line.html#1">line 1 of (eval 1840)[SelfLoader.pm:12]</a>
+# once (10µs+0s) by File::Glob::BEGIN@7 at <a href="File-Glob-pm-2011-line.html#7">line 7 of File/Glob.pm</a></div></div>sub import {</td></tr>
+<tr><td class="h"><a name="174"></a>174</td><td class="c1">2</td><td class="c3"><span title="Avg 500ns">1µs</span></td><td></td><td></td><td class="s"> my $class = shift;</td></tr>
+<tr><td class="h"><a name="175"></a>175</td><td class="c1">2</td><td class="c3"><span title="Avg 800ns">2µs</span></td><td></td><td></td><td class="s"> if (@_ == 0) {</td></tr>
+<tr><td class="h"><a name="176"></a>176</td><td></td><td></td><td></td><td></td><td class="s"> croak("No features specified");</td></tr>
+<tr><td class="h"><a name="177"></a>177</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
+<tr><td class="h"><a name="178"></a>178</td><td class="c1">2</td><td class="c0"><span title="Avg 5µs">10µs</span></td><td></td><td></td><td class="s"> while (@_) {</td></tr>
+<tr><td class="h"><a name="179"></a>179</td><td class="c0">5</td><td class="c3"><span title="Avg 340ns">2µs</span></td><td></td><td></td><td class="s"> my $name = shift(@_);</td></tr>
+<tr><td class="h"><a name="180"></a>180</td><td class="c0">5</td><td class="c1"><span title="Avg 540ns">3µs</span></td><td></td><td></td><td class="s"> if (substr($name, 0, 1) eq ":") {</td></tr>
+<tr><td class="h"><a name="181"></a>181</td><td class="c3">1</td><td class="c3"><span title="Avg 800ns">800ns</span></td><td></td><td></td><td class="s"> my $v = substr($name, 1);</td></tr>
+<tr><td class="h"><a name="182"></a>182</td><td class="c3">1</td><td class="c3"><span title="Avg 900ns">900ns</span></td><td></td><td></td><td class="s"> if (!exists $feature_bundle{$v}) {</td></tr>
+<tr><td class="h"><a name="183"></a>183</td><td></td><td></td><td></td><td></td><td class="s"> $v =~ s/^([0-9]+)\.([0-9]+).[0-9]+$/$1.$2/;</td></tr>
+<tr><td class="h"><a name="184"></a>184</td><td></td><td></td><td></td><td></td><td class="s"> if (!exists $feature_bundle{$v}) {</td></tr>
+<tr><td class="h"><a name="185"></a>185</td><td></td><td></td><td></td><td></td><td class="s"> unknown_feature_bundle(substr($name, 1));</td></tr>
+<tr><td class="h"><a name="186"></a>186</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
+<tr><td class="h"><a name="187"></a>187</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
+<tr><td class="h"><a name="188"></a>188</td><td class="c3">1</td><td class="c2"><span title="Avg 2µs">2µs</span></td><td></td><td></td><td class="s"> unshift @_, @{$feature_bundle{$v}};</td></tr>
+<tr><td class="h"><a name="189"></a>189</td><td class="c3">1</td><td class="c3"><span title="Avg 500ns">500ns</span></td><td></td><td></td><td class="s"> next;</td></tr>
+<tr><td class="h"><a name="190"></a>190</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
+<tr><td class="h"><a name="191"></a>191</td><td class="c0">4</td><td class="c3"><span title="Avg 325ns">1µs</span></td><td></td><td></td><td class="s"> if (!exists $feature{$name}) {</td></tr>
+<tr><td class="h"><a name="192"></a>192</td><td></td><td></td><td></td><td></td><td class="s"> unknown_feature($name);</td></tr>
+<tr><td class="h"><a name="193"></a>193</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
+<tr><td class="h"><a name="194"></a>194</td><td class="c0">4</td><td class="c0"><span title="Avg 2µs">10µs</span></td><td></td><td></td><td class="s"> $^H{$feature{$name}} = 1;</td></tr>
+<tr><td class="h"><a name="195"></a>195</td><td class="c0">4</td><td class="c3"><span title="Avg 400ns">2µs</span></td><td></td><td></td><td class="s"> $^H |= $hint_uni8bit if $name eq 'unicode_strings';</td></tr>
+<tr><td class="h"><a name="196"></a>196</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
+<tr><td class="h"><a name="197"></a>197</td><td></td><td></td><td></td><td></td><td class="s">}</td></tr>
+<tr><td class="h"><a name="198"></a>198</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="199"></a>199</td><td></td><td></td><td></td><td></td><td class="s">sub unimport {</td></tr>
+<tr><td class="h"><a name="200"></a>200</td><td></td><td></td><td></td><td></td><td class="s"> my $class = shift;</td></tr>
+<tr><td class="h"><a name="201"></a>201</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="202"></a>202</td><td></td><td></td><td></td><td></td><td class="s"> # A bare C<no feature> should disable *all* features</td></tr>
+<tr><td class="h"><a name="203"></a>203</td><td></td><td></td><td></td><td></td><td class="s"> if (!@_) {</td></tr>
+<tr><td class="h"><a name="204"></a>204</td><td></td><td></td><td></td><td></td><td class="s"> delete @^H{ values(%feature) };</td></tr>
+<tr><td class="h"><a name="205"></a>205</td><td></td><td></td><td></td><td></td><td class="s"> $^H &= ~ $hint_uni8bit;</td></tr>
+<tr><td class="h"><a name="206"></a>206</td><td></td><td></td><td></td><td></td><td class="s"> return;</td></tr>
+<tr><td class="h"><a name="207"></a>207</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
+<tr><td class="h"><a name="208"></a>208</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="209"></a>209</td><td></td><td></td><td></td><td></td><td class="s"> while (@_) {</td></tr>
+<tr><td class="h"><a name="210"></a>210</td><td></td><td></td><td></td><td></td><td class="s"> my $name = shift;</td></tr>
+<tr><td class="h"><a name="211"></a>211</td><td></td><td></td><td></td><td></td><td class="s"> if (substr($name, 0, 1) eq ":") {</td></tr>
+<tr><td class="h"><a name="212"></a>212</td><td></td><td></td><td></td><td></td><td class="s"> my $v = substr($name, 1);</td></tr>
+<tr><td class="h"><a name="213"></a>213</td><td></td><td></td><td></td><td></td><td class="s"> if (!exists $feature_bundle{$v}) {</td></tr>
+<tr><td class="h"><a name="214"></a>214</td><td></td><td></td><td></td><td></td><td class="s"> $v =~ s/^([0-9]+)\.([0-9]+).[0-9]+$/$1.$2/;</td></tr>
+<tr><td class="h"><a name="215"></a>215</td><td></td><td></td><td></td><td></td><td class="s"> if (!exists $feature_bundle{$v}) {</td></tr>
+<tr><td class="h"><a name="216"></a>216</td><td></td><td></td><td></td><td></td><td class="s"> unknown_feature_bundle(substr($name, 1));</td></tr>
+<tr><td class="h"><a name="217"></a>217</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
+<tr><td class="h"><a name="218"></a>218</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
+<tr><td class="h"><a name="219"></a>219</td><td></td><td></td><td></td><td></td><td class="s"> unshift @_, @{$feature_bundle{$v}};</td></tr>
+<tr><td class="h"><a name="220"></a>220</td><td></td><td></td><td></td><td></td><td class="s"> next;</td></tr>
+<tr><td class="h"><a name="221"></a>221</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
+<tr><td class="h"><a name="222"></a>222</td><td></td><td></td><td></td><td></td><td class="s"> if (!exists($feature{$name})) {</td></tr>
+<tr><td class="h"><a name="223"></a>223</td><td></td><td></td><td></td><td></td><td class="s"> unknown_feature($name);</td></tr>
+<tr><td class="h"><a name="224"></a>224</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
+<tr><td class="h"><a name="225"></a>225</td><td></td><td></td><td></td><td></td><td class="s"> else {</td></tr>
+<tr><td class="h"><a name="226"></a>226</td><td></td><td></td><td></td><td></td><td class="s"> delete $^H{$feature{$name}};</td></tr>
+<tr><td class="h"><a name="227"></a>227</td><td></td><td></td><td></td><td></td><td class="s"> $^H &= ~ $hint_uni8bit if $name eq 'unicode_strings';</td></tr>
+<tr><td class="h"><a name="228"></a>228</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
+<tr><td class="h"><a name="229"></a>229</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
+<tr><td class="h"><a name="230"></a>230</td><td></td><td></td><td></td><td></td><td class="s">}</td></tr>
+<tr><td class="h"><a name="231"></a>231</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="232"></a>232</td><td></td><td></td><td></td><td></td><td class="s">sub unknown_feature {</td></tr>
+<tr><td class="h"><a name="233"></a>233</td><td></td><td></td><td></td><td></td><td class="s"> my $feature = shift;</td></tr>
+<tr><td class="h"><a name="234"></a>234</td><td></td><td></td><td></td><td></td><td class="s"> croak(sprintf('Feature "%s" is not supported by Perl %vd',</td></tr>
+<tr><td class="h"><a name="235"></a>235</td><td></td><td></td><td></td><td></td><td class="s"> $feature, $^V));</td></tr>
+<tr><td class="h"><a name="236"></a>236</td><td></td><td></td><td></td><td></td><td class="s">}</td></tr>
+<tr><td class="h"><a name="237"></a>237</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="238"></a>238</td><td></td><td></td><td></td><td></td><td class="s">sub unknown_feature_bundle {</td></tr>
+<tr><td class="h"><a name="239"></a>239</td><td></td><td></td><td></td><td></td><td class="s"> my $feature = shift;</td></tr>
+<tr><td class="h"><a name="240"></a>240</td><td></td><td></td><td></td><td></td><td class="s"> croak(sprintf('Feature bundle "%s" is not supported by Perl %vd',</td></tr>
+<tr><td class="h"><a name="241"></a>241</td><td></td><td></td><td></td><td></td><td class="s"> $feature, $^V));</td></tr>
+<tr><td class="h"><a name="242"></a>242</td><td></td><td></td><td></td><td></td><td class="s">}</td></tr>
+<tr><td class="h"><a name="243"></a>243</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="244"></a>244</td><td></td><td></td><td></td><td></td><td class="s">sub croak {</td></tr>
+<tr><td class="h"><a name="245"></a>245</td><td></td><td></td><td></td><td></td><td class="s"> require Carp;</td></tr>
+<tr><td class="h"><a name="246"></a>246</td><td></td><td></td><td></td><td></td><td class="s"> Carp::croak(@_);</td></tr>
+<tr><td class="h"><a name="247"></a>247</td><td></td><td></td><td></td><td></td><td class="s">}</td></tr>
+<tr><td class="h"><a name="248"></a>248</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
+<tr><td class="h"><a name="249"></a>249</td><td class="c3">1</td><td class="c0"><span title="Avg 16µs">16µs</span></td><td></td><td></td><td class="s">1;</td></tr>
+</tbody></table></div>
+
+ <script type="text/javascript"> $(document).ready(function() {
+
+ $("#subs_table").tablesorter({
+ sortList: [[3,1]],
+ headers: {
+ 3: { sorter: 'fmt_time' },
+ 4: { sorter: 'fmt_time' }
+ }
+ });
+
+ } ); </script>
+
+ <div class="footer">Report produced by the
+ <a href="http://search.cpan.org/dist/Devel-NYTProf/">NYTProf 4.06</a>
+ Perl profiler, developed by
+ <a href="http://www.linkedin.com/in/timbunce">Tim Bunce</a> and
+ <a href="http://code.nytimes.com">Adam Kaplan</a>.
+ </div>
+ <br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
+ </body></html>
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projects / scpubgit/stemmatology.git / blobdiff