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<title>feature (Deltacloud::BaseDriver)</title>
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<pre><span class="ruby-comment cmt"># File lib/deltacloud/base_driver/features.rb, line 131</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-keyword kw">self</span>.<span class="ruby-identifier">feature</span>(<span class="ruby-identifier">collection</span>, <span class="ruby-identifier">name</span>, <span class="ruby-operator">&</span><span class="ruby-identifier">block</span>)
<span class="ruby-identifier">features</span>[<span class="ruby-identifier">collection</span>] <span class="ruby-operator">||=</span> []
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">f</span> = <span class="ruby-identifier">features</span>[<span class="ruby-identifier">collection</span>].<span class="ruby-identifier">find</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">f</span><span class="ruby-operator">|</span> <span class="ruby-identifier">f</span>.<span class="ruby-identifier">name</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">name</span> }
<span class="ruby-identifier">f</span>.<span class="ruby-identifier">instance_eval</span>(<span class="ruby-operator">&</span><span class="ruby-identifier">block</span>) <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">block_given?</span>
<span class="ruby-keyword kw">return</span> <span class="ruby-identifier">f</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">unless</span> <span class="ruby-identifier">decl</span> = <span class="ruby-identifier">feature_decl_for</span>(<span class="ruby-identifier">collection</span>, <span class="ruby-identifier">name</span>)
<span class="ruby-identifier">raise</span> <span class="ruby-constant">UndeclaredFeatureError</span>, <span class="ruby-node">"No feature #{name} for #{collection}"</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">features</span>[<span class="ruby-identifier">collection</span>] <span class="ruby-operator"><<</span> <span class="ruby-constant">Feature</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">decl</span>, <span class="ruby-operator">&</span><span class="ruby-identifier">block</span>)
<span class="ruby-keyword kw">end</span></pre>
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