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Why is this the intentional behavior? Seems a bit strange that init() is a special exception to the rule.<br /><br />16. May 2016 19:29 by <a href="mailto:clattner@apple.com" target="_blank">clattner@apple.com</a>:<br /><br /><blockquote class="tutanota_quote" style="border-left: 1px solid #93A3B8; padding-left: 10px; margin-left: 5px;"><br /><div><blockquote class="thunderbird_quote" style="border-left: 1px solid #93a3b8 ; padding-left: 10px ; margin-left: 5px"><div>On May 16, 2016, at 7:09 AM, tuuranton--- via swift-users <<a href="mailto:swift-users@swift.org" target="_blank">swift-users@swift.org</a>> wrote:</div><br class="Apple-interchange-newline" /><div>
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<div>Why does the following code compile?</div><div>Why does Bar's init(x: Int) automatically call Foo's init()?</div><div>Why don't I have to manually call super.init() myself?</div></div></div></blockquote><div><br /></div><div>This is intentional behavior. It kicks in when your super class has a single designated initializer with a zero-argument init. This is why you don’t have to call super.init() when deriving from NSObject.</div><div><br /></div><div>-Chris</div><br /><blockquote class="thunderbird_quote" style="border-left: 1px solid #93a3b8 ; padding-left: 10px ; margin-left: 5px"><div><div><div><br /></div><div>What passage of</div><div><a href="https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/Initialization.html#//apple_ref/doc/uid/TP40014097-CH18-ID203" target="_blank">https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/Initialization.html#//apple_ref/doc/uid/TP40014097-CH18-ID203</a></div><div>tells me that this should be the case?</div><div><br /></div><div>--------------------</div><div>class Foo {</div><div> init() {</div><div> print("foo init")</div><div> }</div><div>}</div><div>class Bar: Foo {</div><div> init(x: Int) {</div><div> print("bar init")</div><div> }</div><div>}</div><div>let b = Bar(x: 0)</div><div>//prints:</div><div>// bar init</div><div>// foo init</div> </div>
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