<html><head><style>
body {
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
padding:1em;
margin:auto;
background:#fefefe;
}
h1, h2, h3, h4, h5, h6 {
font-weight: bold;
}
h1 {
color: #000000;
font-size: 28pt;
}
h2 {
border-bottom: 1px solid #CCCCCC;
color: #000000;
font-size: 24px;
}
h3 {
font-size: 18px;
}
h4 {
font-size: 16px;
}
h5 {
font-size: 14px;
}
h6 {
color: #777777;
background-color: inherit;
font-size: 14px;
}
hr {
height: 0.2em;
border: 0;
color: #CCCCCC;
background-color: #CCCCCC;
display: inherit;
}
p, blockquote, ul, ol, dl, li, table, pre {
margin: 15px 0;
}
a, a:visited {
color: #4183C4;
background-color: inherit;
text-decoration: none;
}
#message {
border-radius: 6px;
border: 1px solid #ccc;
display:block;
width:100%;
height:60px;
margin:6px 0px;
}
button, #ws {
font-size: 12 pt;
padding: 4px 6px;
border-radius: 5px;
border: 1px solid #bbb;
background-color: #eee;
}
code, pre, #ws, #message {
font-family: Monaco;
font-size: 10pt;
border-radius: 3px;
background-color: #F8F8F8;
color: inherit;
}
code {
border: 1px solid #EAEAEA;
margin: 0 2px;
padding: 0 5px;
}
pre {
border: 1px solid #CCCCCC;
overflow: auto;
padding: 4px 8px;
}
pre > code {
border: 0;
margin: 0;
padding: 0;
}
#ws { background-color: #f8f8f8; }
.bloop_markdown table {
border-collapse: collapse;
font-family: Helvetica, arial, freesans, clean, sans-serif;
color: rgb(51, 51, 51);
font-size: 15px; line-height: 25px;
padding: 0; }
.bloop_markdown table tr {
border-top: 1px solid #cccccc;
background-color: white;
margin: 0;
padding: 0; }
.bloop_markdown table tr:nth-child(2n) {
background-color: #f8f8f8; }
.bloop_markdown table tr th {
font-weight: bold;
border: 1px solid #cccccc;
margin: 0;
padding: 6px 13px; }
.bloop_markdown table tr td {
border: 1px solid #cccccc;
margin: 0;
padding: 6px 13px; }
.bloop_markdown table tr th :first-child, table tr td :first-child {
margin-top: 0; }
.bloop_markdown table tr th :last-child, table tr td :last-child {
margin-bottom: 0; }
.bloop_markdown blockquote{
border-left: 4px solid #dddddd;
padding: 0 15px;
color: #777777; }
blockquote > :first-child {
margin-top: 0; }
blockquote > :last-child {
margin-bottom: 0; }
code, pre, #ws, #message {
word-break: normal;
word-wrap: normal;
}
hr {
display: inherit;
}
.bloop_markdown :first-child {
-webkit-margin-before: 0;
}
code, pre, #ws, #message {
font-family: Menlo, Consolas, Liberation Mono, Courier, monospace;
}
.send { color:#77bb77; }
.server { color:#7799bb; }
.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>I haven’t yet read all the feedback in this topic but I’d like to throw some bikeshedding of mine into the room. :)</p>
<p>How about this?</p>
<ul>
<li>Version 1: <code>func(pure) …</code></li>
<li>Version 2: <code>func label(…) ~> ReturnType</code></li>
</ul>
<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_1487348271816036864" 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 17. Februar 2017 um 17:16:49, Anton Zhilin via swift-evolution (<a href="mailto:swift-evolution@swift.org">swift-evolution@swift.org</a>) schrieb:</p> <blockquote type="cite" class="clean_bq"><span><div><div></div><div>
<title></title>
<div dir="ltr">
<div class="markdown-here-wrapper" style="">
<p style="margin:0px 0px 1.2em!important">2017-02-17 17:13
GMT+03:00 T.J. Usiyan <<a href="mailto:griotspeak@gmail.com" target="_blank">griotspeak@gmail.com</a>>:</p>
<p style="margin:0px 0px 1.2em!important"></p>
<div class="markdown-here-exclude">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>It is my opinion that you are describing an entirely
different, and somewhat orthogonal, feature. I would like the
feature that you describe. Constant expressions are powerful and
open up quite a few optimizations. What constexpr addresses is not
purity, at the heart of it. Pure expressions that accept
compile-time-known values are, by happy accident,
compile-time-computable, but pure expressions that accept dynamic
values are not. Conflating the two qualities of being
compile-time-known and being pure within the same keyword and
overloading it in this way is not desirable to me.</div>
</div>
</blockquote>
</div>
<p style="margin:0px 0px 1.2em!important"></p>
<p style="margin:0px 0px 1.2em!important">I see now. I’d say that
access to global state is not vital, and <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-radius:3px;display:inline">
@pure</code> functions are more useful than <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-radius:3px;display:inline">
@const</code> functions, so I’m OK with having only <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-radius:3px;display:inline">
@const</code> functions.</p>
<p style="margin:0px 0px 1.2em!important">To control growth of
compilation time, we could have both <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-radius:3px;display:inline">
@pure</code> function annotation and <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-radius:3px;display:inline">
@const</code> variable annotation to <em>ensure</em> that a
<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-radius:3px;display:inline">
@pure</code> expression is computed at compilation time.</p>
<p style="margin:0px 0px 1.2em!important">I’d also want to infer
<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-radius:3px;display:inline">
@pure</code> whenever possible, but is it possible with functions
in different modules?</p>
<div title="MDH:PGRpdiBjbGFzcz0iZ21haWxfZXh0cmEiPjxkaXYgY2xhc3M9ImdtYWlsX3F1b3RlIj4yMDE3LTAy LTE3IDE3OjEzIEdNVCswMzowMCBULkouIFVzaXlhbiA8c3BhbiBkaXI9Imx0ciI+Jmx0OzxhIGhy ZWY9Im1haWx0bzpncmlvdHNwZWFrQGdtYWlsLmNvbSIgdGFyZ2V0PSJfYmxhbmsiPmdyaW90c3Bl YWtAZ21haWwuY29tPC9hPiZndDs8L3NwYW4+Ojxicj48YmxvY2txdW90ZSBjbGFzcz0iZ21haWxf cXVvdGUiIHN0eWxlPSJtYXJnaW46MCAwIDAgLjhleDtib3JkZXItbGVmdDoxcHggI2NjYyBzb2xp ZDtwYWRkaW5nLWxlZnQ6MWV4Ij48ZGl2IGRpcj0ibHRyIj48ZGl2Pkl0IGlzIG15IG9waW5pb24g dGhhdCB5b3UgYXJlIGRlc2NyaWJpbmcgYW4gZW50aXJlbHkgZGlmZmVyZW50LCBhbmQgc29tZXdo YXQgb3J0aG9nb25hbCwgZmVhdHVyZS4mbmJzcDtJIHdvdWxkIGxpa2UgdGhlIGZlYXR1cmUgdGhh dCB5b3UgZGVzY3JpYmUuIENvbnN0YW50IGV4cHJlc3Npb25zIGFyZSBwb3dlcmZ1bCBhbmQgb3Bl biB1cCBxdWl0ZSBhIGZldyBvcHRpbWl6YXRpb25zLiBXaGF0IGNvbnN0ZXhwciBhZGRyZXNzZXMg aXMgbm90IHB1cml0eSwgYXQgdGhlIGhlYXJ0IG9mIGl0LiBQdXJlIGV4cHJlc3Npb25zIHRoYXQg YWNjZXB0IGNvbXBpbGUtdGltZS1rbm93biB2YWx1ZXMgYXJlLCBieSBoYXBweSBhY2NpZGVudCwg Y29tcGlsZS10aW1lLWNvbXB1dGFibGUsIGJ1dCBwdXJlIGV4cHJlc3Npb25zIHRoYXQgYWNjZXB0 IGR5bmFtaWMgdmFsdWVzIGFyZSBub3QuIENvbmZsYXRpbmcgdGhlIHR3byBxdWFsaXRpZXMgb2Yg YmVpbmcgY29tcGlsZS10aW1lLWtub3duIGFuZCBiZWluZyBwdXJlIHdpdGhpbiB0aGUgc2FtZSBr ZXl3b3JkIGFuZCBvdmVybG9hZGluZyBpdCBpbiB0aGlzIHdheSBpcyBub3QgZGVzaXJhYmxlIHRv IG1lLjwvZGl2PjwvZGl2PjwvYmxvY2txdW90ZT48ZGl2Pjxicj48L2Rpdj48ZGl2Pkkgc2VlIG5v dy4gSSdkIHNheSB0aGF0IGFjY2VzcyB0byBnbG9iYWwgc3RhdGUgaXMgbm90IHZpdGFsLCBhbmQg YEBwdXJlYCBmdW5jdGlvbnMgYXJlIG1vcmUgdXNlZnVsIHRoYW4gYEBjb25zdGAgZnVuY3Rpb25z LCBzbyBJJ20gT0sgd2l0aCBoYXZpbmcgb25seSBgQGNvbnN0YCBmdW5jdGlvbnMuPC9kaXY+PGRp dj48YnI+PC9kaXY+PGRpdj5UbyBjb250cm9sIGdyb3d0aCBvZiBjb21waWxhdGlvbiB0aW1lLCB3 ZSBjb3VsZCBoYXZlIGJvdGggYEBwdXJlYCBmdW5jdGlvbiBhbm5vdGF0aW9uIGFuZCBgQGNvbnN0 YCB2YXJpYWJsZSBhbm5vdGF0aW9uIHRvICplbnN1cmUqIHRoYXQgYSBgQHB1cmVgIGV4cHJlc3Np b24gaXMgY29tcHV0ZWQgYXQgY29tcGlsYXRpb24gdGltZS48L2Rpdj48ZGl2Pjxicj48L2Rpdj48 ZGl2PkknZCBhbHNvIHdhbnQgdG8gaW5mZXIgYEBwdXJlYCB3aGVuZXZlciBwb3NzaWJsZSwgYnV0 IGlzIGl0IHBvc3NpYmxlIHdpdGggZnVuY3Rpb25zIGluIGRpZmZlcmVudCBtb2R1bGVzPzwvZGl2 PjwvZGl2PjwvZGl2Pg==" style="height:0;width:0;max-height:0;max-width:0;overflow:hidden;font-size:0em;padding:0;margin:0">
</div>
</div>
</div>
_______________________________________________<br>swift-evolution mailing list<br>swift-evolution@swift.org<br>https://lists.swift.org/mailman/listinfo/swift-evolution<br></div></div></span></blockquote></div><div class="bloop_markdown"><p></p></div></body></html>