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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>The question here is, how is a tuple different from a mathematical vector? I wasn’t referring to vector concepts from other languages, but used the keyword <code>vector</code> to indicate a shortcut that provides a fixed or an arbitrary length such as <code>…T</code> would do in variadic generics context.</p>
<p>A shortcut for <code>(Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int)</code> is probably not that bad to have. In my sketch it would be <code>(vector(16) Int)</code>, but it still would be a tuple. Structs aren’t arrays, but we created a value type that represents dynamic arrays (called vectors in different languages) and called it <code>Array</code>. Furthermore the dynamic array is not a simple primitive type and contains a whole bunch of other things.</p>
<p>That said, I don’t see why tuples should not benefit from all of that, if features like parametrized extensions make it into Swift one day.</p>
<pre><code class="swift">extension<…T> (T…) : MutableCollection { … }
// or from my sketch
extension<vector generic T> (vector T) : MutableCollection { … }
</code></pre>
<p>Being able to tell the size of such a vector is more beneficial than only having the <code>…</code> pre- and postfix for arbitrary length.</p>
<p>Currently variadics return <code>Array<T></code>, which is *kinda* fine, but is not fully correct, because the returned sequence cannot be empty.</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> <br> <div id="bloop_sign_1488544901232270080" 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 3. März 2017 um 13:35:47, Tino Heth (<a href="mailto:2th@gmx.de">2th@gmx.de</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;" class=""><div></div><div>
<title></title>
<div><br class="">
<blockquote type="cite" class="">
<div class="">
<p style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; margin: 0px 0px 1.2em !important;" class="">I think that tuples should remain what they are now.
Static-length vectors should be types on their own and interact
with tuples, with structs and with<span class="Apple-converted-space"> </span><code style="font-size: 0.85em; font-family: Consolas, Inconsolata, Courier, monospace; margin: 0px 0.15em; padding: 0px 0.3em; white-space: pre-wrap; border: 1px solid rgb(234, 234, 234); background-color: rgb(248, 248, 248); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; display: inline;" class="">Array<…></code><span class="Apple-converted-space"> </span>in the same way.</p>
</div>
</blockquote>
I strongly agree: Fixed-size vectors are a well known and simple
concept that shouldn't be conflated with tuples.</div>
<div><br class=""></div>
<div>Afair there was a time when Swift had no set-type, and I think
we are lucky that it was added, instead of forcing us to use other
collections instead.</div>
<div>Mixing array and tuple feels like having a switch for array to
behave like a set...</div>
</div></div></span></blockquote></div><div class="bloop_markdown"><p></p></div></body></html>