File: C:/Ruby27-x64/share/doc/ruby/html/Psych/ScalarScanner.html
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<h3>Methods</h3>
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<li ><a href="#method-c-new">::new</a>
<li ><a href="#method-i-parse_int">#parse_int</a>
<li ><a href="#method-i-parse_time">#parse_time</a>
<li ><a href="#method-i-tokenize">#tokenize</a>
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<h1 id="class-Psych::ScalarScanner" class="class">
class Psych::ScalarScanner
</h1>
<section class="description">
<p>Scan scalars for built in types</p>
</section>
<section id="5Buntitled-5D" class="documentation-section">
<section class="constants-list">
<header>
<h3>Constants</h3>
</header>
<dl>
<dt id="FLOAT">FLOAT
<dd><p>Taken from <a href="http://yaml.org/type/float.html">yaml.org/type/float.html</a></p>
<dt id="INTEGER">INTEGER
<dd><p>Taken from <a href="http://yaml.org/type/int.html">yaml.org/type/int.html</a></p>
<dt id="TIME">TIME
<dd><p>Taken from <a href="http://yaml.org/type/timestamp.html">yaml.org/type/timestamp.html</a></p>
</dl>
</section>
<section class="attribute-method-details" class="method-section">
<header>
<h3>Attributes</h3>
</header>
<div id="attribute-i-class_loader" class="method-detail">
<div class="method-heading attribute-method-heading">
<span class="method-name">class_loader</span><span
class="attribute-access-type">[R]</span>
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<div class="method-description">
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<section id="public-class-5Buntitled-5D-method-details" class="method-section">
<header>
<h3>Public Class Methods</h3>
</header>
<div id="method-c-new" class="method-detail ">
<div class="method-heading">
<span class="method-name">new</span><span
class="method-args">(class_loader)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Create a new scanner</p>
<div class="method-source-code" id="new-source">
<pre><span class="ruby-comment"># File ext/psych/lib/psych/scalar_scanner.rb, line 25</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">initialize</span> <span class="ruby-identifier">class_loader</span>
<span class="ruby-ivar">@symbol_cache</span> = {}
<span class="ruby-ivar">@class_loader</span> = <span class="ruby-identifier">class_loader</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
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</section>
<section id="public-instance-5Buntitled-5D-method-details" class="method-section">
<header>
<h3>Public Instance Methods</h3>
</header>
<div id="method-i-parse_int" class="method-detail ">
<div class="method-heading">
<span class="method-name">parse_int</span><span
class="method-args">(string)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Parse and return an int from <code>string</code></p>
<div class="method-source-code" id="parse_int-source">
<pre><span class="ruby-comment"># File ext/psych/lib/psych/scalar_scanner.rb, line 103</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">parse_int</span> <span class="ruby-identifier">string</span>
<span class="ruby-constant">Integer</span>(<span class="ruby-identifier">string</span>.<span class="ruby-identifier">gsub</span>(<span class="ruby-regexp">/[,]/</span>, <span class="ruby-string">''</span>))
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-parse_time" class="method-detail ">
<div class="method-heading">
<span class="method-name">parse_time</span><span
class="method-args">(string)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Parse and return a <a href="../Time.html"><code>Time</code></a> from <code>string</code></p>
<div class="method-source-code" id="parse_time-source">
<pre><span class="ruby-comment"># File ext/psych/lib/psych/scalar_scanner.rb, line 109</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">parse_time</span> <span class="ruby-identifier">string</span>
<span class="ruby-identifier">klass</span> = <span class="ruby-identifier">class_loader</span>.<span class="ruby-identifier">load</span> <span class="ruby-string">'Time'</span>
<span class="ruby-identifier">date</span>, <span class="ruby-identifier">time</span> = <span class="ruby-operator">*</span>(<span class="ruby-identifier">string</span>.<span class="ruby-identifier">split</span>(<span class="ruby-regexp">/[ tT]/</span>, <span class="ruby-value">2</span>))
(<span class="ruby-identifier">yy</span>, <span class="ruby-identifier">m</span>, <span class="ruby-identifier">dd</span>) = <span class="ruby-identifier">date</span>.<span class="ruby-identifier">match</span>(<span class="ruby-regexp">/^(-?\d{4})-(\d{1,2})-(\d{1,2})/</span>).<span class="ruby-identifier">captures</span>.<span class="ruby-identifier">map</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">x</span><span class="ruby-operator">|</span> <span class="ruby-identifier">x</span>.<span class="ruby-identifier">to_i</span> }
<span class="ruby-identifier">md</span> = <span class="ruby-identifier">time</span>.<span class="ruby-identifier">match</span>(<span class="ruby-regexp">/(\d+:\d+:\d+)(?:\.(\d*))?\s*(Z|[-+]\d+(:\d\d)?)?/</span>)
(<span class="ruby-identifier">hh</span>, <span class="ruby-identifier">mm</span>, <span class="ruby-identifier">ss</span>) = <span class="ruby-identifier">md</span>[<span class="ruby-value">1</span>].<span class="ruby-identifier">split</span>(<span class="ruby-string">':'</span>).<span class="ruby-identifier">map</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">x</span><span class="ruby-operator">|</span> <span class="ruby-identifier">x</span>.<span class="ruby-identifier">to_i</span> }
<span class="ruby-identifier">us</span> = (<span class="ruby-identifier">md</span>[<span class="ruby-value">2</span>] <span class="ruby-operator">?</span> <span class="ruby-constant">Rational</span>(<span class="ruby-node">"0.#{md[2]}"</span>) <span class="ruby-operator">:</span> <span class="ruby-value">0</span>) <span class="ruby-operator">*</span> <span class="ruby-value">1000000</span>
<span class="ruby-identifier">time</span> = <span class="ruby-identifier">klass</span>.<span class="ruby-identifier">utc</span>(<span class="ruby-identifier">yy</span>, <span class="ruby-identifier">m</span>, <span class="ruby-identifier">dd</span>, <span class="ruby-identifier">hh</span>, <span class="ruby-identifier">mm</span>, <span class="ruby-identifier">ss</span>, <span class="ruby-identifier">us</span>)
<span class="ruby-keyword">return</span> <span class="ruby-identifier">time</span> <span class="ruby-keyword">if</span> <span class="ruby-string">'Z'</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">md</span>[<span class="ruby-value">3</span>]
<span class="ruby-keyword">return</span> <span class="ruby-identifier">klass</span>.<span class="ruby-identifier">at</span>(<span class="ruby-identifier">time</span>.<span class="ruby-identifier">to_i</span>, <span class="ruby-identifier">us</span>) <span class="ruby-keyword">unless</span> <span class="ruby-identifier">md</span>[<span class="ruby-value">3</span>]
<span class="ruby-identifier">tz</span> = <span class="ruby-identifier">md</span>[<span class="ruby-value">3</span>].<span class="ruby-identifier">match</span>(<span class="ruby-regexp">/^([+\-]?\d{1,2})\:?(\d{1,2})?$/</span>)[<span class="ruby-value">1</span><span class="ruby-operator">..</span><span class="ruby-value">-1</span>].<span class="ruby-identifier">compact</span>.<span class="ruby-identifier">map</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">digit</span><span class="ruby-operator">|</span> <span class="ruby-constant">Integer</span>(<span class="ruby-identifier">digit</span>, <span class="ruby-value">10</span>) }
<span class="ruby-identifier">offset</span> = <span class="ruby-identifier">tz</span>.<span class="ruby-identifier">first</span> <span class="ruby-operator">*</span> <span class="ruby-value">3600</span>
<span class="ruby-keyword">if</span> <span class="ruby-identifier">offset</span> <span class="ruby-operator"><</span> <span class="ruby-value">0</span>
<span class="ruby-identifier">offset</span> <span class="ruby-operator">-=</span> ((<span class="ruby-identifier">tz</span>[<span class="ruby-value">1</span>] <span class="ruby-operator">||</span> <span class="ruby-value">0</span>) <span class="ruby-operator">*</span> <span class="ruby-value">60</span>)
<span class="ruby-keyword">else</span>
<span class="ruby-identifier">offset</span> <span class="ruby-operator">+=</span> ((<span class="ruby-identifier">tz</span>[<span class="ruby-value">1</span>] <span class="ruby-operator">||</span> <span class="ruby-value">0</span>) <span class="ruby-operator">*</span> <span class="ruby-value">60</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-identifier">klass</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">yy</span>, <span class="ruby-identifier">m</span>, <span class="ruby-identifier">dd</span>, <span class="ruby-identifier">hh</span>, <span class="ruby-identifier">mm</span>, <span class="ruby-identifier">ss</span><span class="ruby-operator">+</span><span class="ruby-identifier">us</span><span class="ruby-operator">/</span>(<span class="ruby-value">1_000_000r</span>), <span class="ruby-identifier">offset</span>)
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-tokenize" class="method-detail ">
<div class="method-heading">
<span class="method-name">tokenize</span><span
class="method-args">(string)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Tokenize <code>string</code> returning the Ruby object</p>
<div class="method-source-code" id="tokenize-source">
<pre><span class="ruby-comment"># File ext/psych/lib/psych/scalar_scanner.rb, line 31</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">tokenize</span> <span class="ruby-identifier">string</span>
<span class="ruby-keyword">return</span> <span class="ruby-keyword">nil</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">empty?</span>
<span class="ruby-keyword">return</span> <span class="ruby-ivar">@symbol_cache</span>[<span class="ruby-identifier">string</span>] <span class="ruby-keyword">if</span> <span class="ruby-ivar">@symbol_cache</span>.<span class="ruby-identifier">key?</span>(<span class="ruby-identifier">string</span>)
<span class="ruby-comment"># Check for a String type, being careful not to get caught by hash keys, hex values, and</span>
<span class="ruby-comment"># special floats (e.g., -.inf).</span>
<span class="ruby-keyword">if</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-regexp">/^[^\d\.:-]?[A-Za-z_\s!@#\$%\^&\*\(\)\{\}\<\>\|\/\\~;=]+/</span>) <span class="ruby-operator">||</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-regexp">/\n/</span>)
<span class="ruby-keyword">return</span> <span class="ruby-identifier">string</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">length</span> <span class="ruby-operator">></span> <span class="ruby-value">5</span>
<span class="ruby-keyword">if</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-regexp">/^[^ytonf~]/i</span>)
<span class="ruby-identifier">string</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">string</span> <span class="ruby-operator">==</span> <span class="ruby-string">'~'</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-regexp">/^null$/i</span>)
<span class="ruby-keyword">nil</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-regexp">/^(yes|true|on)$/i</span>)
<span class="ruby-keyword">true</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-regexp">/^(no|false|off)$/i</span>)
<span class="ruby-keyword">false</span>
<span class="ruby-keyword">else</span>
<span class="ruby-identifier">string</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-constant">TIME</span>)
<span class="ruby-keyword">begin</span>
<span class="ruby-identifier">parse_time</span> <span class="ruby-identifier">string</span>
<span class="ruby-keyword">rescue</span> <span class="ruby-constant">ArgumentError</span>
<span class="ruby-identifier">string</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-regexp">/^\d{4}-(?:1[012]|0\d|\d)-(?:[12]\d|3[01]|0\d|\d)$/</span>)
<span class="ruby-identifier">require</span> <span class="ruby-string">'date'</span>
<span class="ruby-keyword">begin</span>
<span class="ruby-identifier">class_loader</span>.<span class="ruby-identifier">date</span>.<span class="ruby-identifier">strptime</span>(<span class="ruby-identifier">string</span>, <span class="ruby-string">'%Y-%m-%d'</span>)
<span class="ruby-keyword">rescue</span> <span class="ruby-constant">ArgumentError</span>
<span class="ruby-identifier">string</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-regexp">/^\.inf$/i</span>)
<span class="ruby-constant">Float</span><span class="ruby-operator">::</span><span class="ruby-constant">INFINITY</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-regexp">/^-\.inf$/i</span>)
<span class="ruby-operator">-</span><span class="ruby-constant">Float</span><span class="ruby-operator">::</span><span class="ruby-constant">INFINITY</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-regexp">/^\.nan$/i</span>)
<span class="ruby-constant">Float</span><span class="ruby-operator">::</span><span class="ruby-constant">NAN</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-regexp">/^:./</span>)
<span class="ruby-keyword">if</span> <span class="ruby-identifier">string</span> <span class="ruby-operator">=~</span> <span class="ruby-regexp">/^:(["'])(.*)\1/</span>
<span class="ruby-ivar">@symbol_cache</span>[<span class="ruby-identifier">string</span>] = <span class="ruby-identifier">class_loader</span>.<span class="ruby-identifier">symbolize</span>(<span class="ruby-node">$2</span>.<span class="ruby-identifier">sub</span>(<span class="ruby-regexp">/^:/</span>, <span class="ruby-string">''</span>))
<span class="ruby-keyword">else</span>
<span class="ruby-ivar">@symbol_cache</span>[<span class="ruby-identifier">string</span>] = <span class="ruby-identifier">class_loader</span>.<span class="ruby-identifier">symbolize</span>(<span class="ruby-identifier">string</span>.<span class="ruby-identifier">sub</span>(<span class="ruby-regexp">/^:/</span>, <span class="ruby-string">''</span>))
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-regexp">/^[-+]?[0-9][0-9_]*(:[0-5]?[0-9]){1,2}$/</span>)
<span class="ruby-identifier">i</span> = <span class="ruby-value">0</span>
<span class="ruby-identifier">string</span>.<span class="ruby-identifier">split</span>(<span class="ruby-string">':'</span>).<span class="ruby-identifier">each_with_index</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">n</span>,<span class="ruby-identifier">e</span><span class="ruby-operator">|</span>
<span class="ruby-identifier">i</span> <span class="ruby-operator">+=</span> (<span class="ruby-identifier">n</span>.<span class="ruby-identifier">to_i</span> <span class="ruby-operator">*</span> <span class="ruby-value">60</span> <span class="ruby-operator">**</span> (<span class="ruby-identifier">e</span> <span class="ruby-operator">-</span> <span class="ruby-value">2</span>).<span class="ruby-identifier">abs</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-identifier">i</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-regexp">/^[-+]?[0-9][0-9_]*(:[0-5]?[0-9]){1,2}\.[0-9_]*$/</span>)
<span class="ruby-identifier">i</span> = <span class="ruby-value">0</span>
<span class="ruby-identifier">string</span>.<span class="ruby-identifier">split</span>(<span class="ruby-string">':'</span>).<span class="ruby-identifier">each_with_index</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">n</span>,<span class="ruby-identifier">e</span><span class="ruby-operator">|</span>
<span class="ruby-identifier">i</span> <span class="ruby-operator">+=</span> (<span class="ruby-identifier">n</span>.<span class="ruby-identifier">to_f</span> <span class="ruby-operator">*</span> <span class="ruby-value">60</span> <span class="ruby-operator">**</span> (<span class="ruby-identifier">e</span> <span class="ruby-operator">-</span> <span class="ruby-value">2</span>).<span class="ruby-identifier">abs</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-identifier">i</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-constant">FLOAT</span>)
<span class="ruby-keyword">if</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-regexp">/\A[-+]?\.\Z/</span>)
<span class="ruby-identifier">string</span>
<span class="ruby-keyword">else</span>
<span class="ruby-constant">Float</span>(<span class="ruby-identifier">string</span>.<span class="ruby-identifier">gsub</span>(<span class="ruby-regexp">/[,_]|\.([Ee]|$)/</span>, <span class="ruby-string">'\1'</span>))
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">string</span>.<span class="ruby-identifier">match?</span>(<span class="ruby-constant">INTEGER</span>)
<span class="ruby-identifier">parse_int</span> <span class="ruby-identifier">string</span>
<span class="ruby-keyword">else</span>
<span class="ruby-identifier">string</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
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