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.send { color:#77bb77; }
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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>Is the throwing type always a protocol? In your example it is, but is this going to be always the case?</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_1487358630353125120" 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 20:08:38, Kevin Nattinger (<a href="mailto:swift@nattinger.net">swift@nattinger.net</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>
protocol MyError: Error {}
<div class="">enum MyFooError: MyError { … }</div>
<div class="">enum MyBarError: MyError { … }</div>
<div class=""><br class=""></div>
<div class="">func baz() throws(MyError)</div>
<div class=""><br class="">
<div>
<blockquote type="cite" class="">
<div class="">On Feb 17, 2017, at 11:03 AM, Adrian Zubarev via
swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div class="bloop_markdown" style="font-family: Helvetica, Arial; font-size: 13px; 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; background-color: rgb(254, 254, 254);">
<p style="margin: 15px 0px; -webkit-margin-before: 0px;" class="">I
suggest we need to find a way to shorten the list of the possible
error types with a the help of<span class="Apple-converted-space"> </span><code style="font-family: Menlo, Consolas, 'Liberation Mono', Courier, monospace; font-size: 10pt; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; background-color: rgb(248, 248, 248); color: inherit; border: 1px solid rgb(234, 234, 234); margin: 0px 2px; padding: 0px 5px; word-break: normal; word-wrap: normal; -webkit-margin-before: 0px;" class="">typeallias</code></p>
<pre style="margin: 15px 0px; font-family: Menlo, Consolas, 'Liberation Mono', Courier, monospace; font-size: 10pt; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; background-color: rgb(248, 248, 248); color: inherit; border: 1px solid rgb(204, 204, 204); overflow: auto; padding: 4px 8px; word-break: normal; word-wrap: normal;" class=""><code class="swift" style="font-family: Menlo, Consolas, 'Liberation Mono', Courier, monospace; font-size: 10pt; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; background-color: rgb(248, 248, 248); color: inherit; border: 0px; margin: 0px; padding: 0px; word-break: normal; word-wrap: normal; -webkit-margin-before: 0px;">extension MyError1: Error { ... }
extension MyError2: Error { ... }
extension MyError3: Error { ... }
typealias MyErrors = MyError1 | MyError2 | MyError3
func foo() throws(MyErrors) -> MyResult
func bar<T : Error>(_: () throws(T) -> Void) rethrows(MyErrors, T) -> MyResult
</code></pre>
<div style="margin: 15px 0px;" class=""><br class="webkit-block-placeholder"></div>
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<div class="bloop_original_html" style="font-family: Helvetica, Arial; font-size: 13px; 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; background-color: rgb(254, 254, 254);">
<div id="bloop_customfont" style="font-family: Helvetica, Arial; font-size: 13px; margin: 0px;" class=""><br class=""></div>
<br class="">
<div id="bloop_sign_1487357889432032000" class="bloop_sign">
<div style="font-family: helvetica, arial; font-size: 13px;" class="">-- <br class="">
Adrian Zubarev<br class="">
Sent with Airmail</div>
</div>
<br class="">
<p class="airmail_on" style="margin: 15px 0px;">Am 17. Februar 2017
um 19:47:47, Anton Zhilin via swift-evolution (<a href="mailto:swift-evolution@swift.org" style="color: rgb(65, 131, 196); background-color: inherit; text-decoration: none;" class="">swift-evolution@swift.org</a>) schrieb:</p>
<blockquote type="cite" class="clean_bq" style="margin: 15px 0px;">
<div class="">
<div class=""></div>
<div class="">
<div dir="ltr" class="">
<div class="markdown-here-wrapper">
<p style="margin: 0px 0px 1.2em !important;" class=""><span style="margin-top: 0px; margin-bottom: 0px;" class="">Now this is
on-topic, I guess.<br class="">
Last time we stopped at John McCall’s syntax:</span></p>
<pre style="margin: 1.2em 0px; font-family: Consolas, Inconsolata, Courier, monospace; font-size: 10pt; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; background-color: rgb(248, 248, 248); color: inherit; border: 1px solid rgb(204, 204, 204); overflow: auto; padding: 4px 8px; word-break: normal; word-wrap: normal; line-height: 1.2em;" class=""><span style="margin-top: 0px; margin-bottom: 0px;" class=""><code style="font-family: Consolas, Inconsolata, Courier, monospace; font-size: 10pt; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; background-color: rgb(248, 248, 248); color: inherit; border: 1px solid rgb(204, 204, 204); margin: 0px 0.15em; padding: 0.5em 0.7em; word-break: normal; word-wrap: normal; white-space: pre; overflow: auto; display: block !important;" class="">extension MyError: Error { ... }
func foo() throws(MyError) -> MyResult<span style="font-size: 0.85em;" class="">
</span></code></span></pre>
<p style="margin: 0px 0px 1.2em !important;" class="">It’s
conservative and prevents visual ambiguity with extra
parentheses.</p>
<p style="margin: 0px 0px 1.2em !important;" class="">If we
(somewhat) agree on this, then submitting a proposal will be
trivial.</p>
<div title="MDH:Tm93IHRoaXMgaXMgb24tdG9waWMsIEkgZ3Vlc3MuPGRpdj5MYXN0IHRpbWUgd2Ugc3RvcHBlZCBh dCBKb2huIE1jQ2FsbCdzIHN5bnRheDo8L2Rpdj48ZGl2Pjxicj48L2Rpdj48ZGl2PmBgYDwvZGl2 PjxkaXY+ZXh0ZW5zaW9uIE15RXJyb3I6IEVycm9yIHsgLi4uIH08L2Rpdj48ZGl2Pjxicj48L2Rp dj48ZGl2PmZ1bmMgZm9vKCkgdGhyb3dzKE15RXJyb3IpIC0mZ3Q7IE15UmVzdWx0PC9kaXY+PGRp dj5gYGA8L2Rpdj48ZGl2Pjxicj48L2Rpdj48ZGl2Pkl0J3MgY29uc2VydmF0aXZlIGFuZCBwcmV2 ZW50cyB2aXN1YWwgYW1iaWd1aXR5IHdpdGggZXh0cmEgcGFyZW50aGVzZXMuPGJyPjwvZGl2Pjxk aXY+PGJyPjwvZGl2PjxkaXY+SWYgd2UgKHNvbWV3aGF0KSBhZ3JlZSBvbiB0aGlzLCB0aGVuIHN1 Ym1pdHRpbmcgYSBwcm9wb3NhbCB3aWxsIGJlIHRyaXZpYWwuPC9kaXY+" style="height: 0px; width: 0px; max-height: 0px; max-width: 0px; overflow: hidden; font-size: 0em; padding: 0px; margin: 0px;" class=""></div>
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</div>
</blockquote>
</div>
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