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.error { color:#AA0000; }</style></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="bloop_markdown"><p>And yet another correction of the <strong>default protocol implementations</strong> part of my reply.</p>
<p>The imported module is correct, but the default implementation is not imported (I relied on Xcode which didn’t raise an error before I started building the project where I was using the module, and I didn’t build it at the first time).</p>
<p>So we’d need to implement <code>foo</code> by ourself.</p>
<pre><code class="swift">struct B : A {
public func foo() {}
}
</code></pre>
<p>The rest of my reply should be fine. With the same access control it would be more clearer and intuitive how the extension will be imported.</p>
<p></p></div><div class="bloop_original_html"><style>body{font-family:Helvetica,Arial;font-size:13px}</style><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div> <div id="bloop_sign_1467024177600357120" class="bloop_sign"><div style="font-family:helvetica,arial;font-size:13px">-- <br>Adrian Zubarev<br>Sent with Airmail</div></div> <br><p class="airmail_on">Am 27. Juni 2016 um 10:38:12, Adrian Zubarev (<a href="mailto:adrian.zubarev@devandartist.com">adrian.zubarev@devandartist.com</a>) schrieb:</p><blockquote type="cite" class="clean_bq"><span><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div></div><div>
<title></title>
<div class="bloop_markdown">
<p>Lets examine the impact on <strong>default protocol
implementations</strong>:</p>
<p>Currently we have this behavior:</p>
<pre><code class="swift">public protocol A {
func foo()
}
extension A {
func foo() { /* implement */ }
}
</code></pre>
<p>The imported version would look like this.</p>
<pre><code class="swift">public protocol A {
public func foo()
}
</code></pre>
<p>As the module user you have no clue that there might be a
default implementation, but you sill will be able to use it,
because when conforming to <code>A</code> you don’t have to
implement foo. This implicitly signals you that there is indeed a
default implemenation</p>
<pre><code class="swift">struct B : A {} // This will be enough
A().foo() // this is fine
</code></pre>
<p>One could signal the module user that there is a default
implementation by making the extension explicit public as well.</p>
<pre><code class="swift">// explicitly marked as public to grant visibility to
// the default implementation extension bag
public extension A {
/// will do something cool
func foo() { /* implement */ }
}
</code></pre>
<p>The result of the imported module would change and look like
this:</p>
<pre><code class="swift">public protocol A {
public func foo()
}
extension A {
/// will do something cool
public func foo()
}
</code></pre>
<p>With the proposed change all default implementations will become
visible by default and I think this is great step as well.</p></div><div class="bloop_original_html"><blockquote type="cite" class="clean_bq"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div>
</div>
</div>
</blockquote>
</div>
<div class="bloop_markdown"></div>
</div></div></span></blockquote></div><div class="bloop_markdown"><p></p></div></body></html>