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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>I suggest we need to find a way to shorten the list of the possible error types with a the help of <code>typeallias</code></p>
<pre><code class="swift">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>
<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_1487357889432032000" 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 19:47:47, 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>
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<p style="margin:0px 0px 1.2em!important">Now this is on-topic, I
guess.<br>
Last time we stopped at John McCall’s syntax:</p>
<pre style="font-family:Consolas,Inconsolata,Courier,monospace;line-height:1.2em;margin:1.2em 0px"><code style="font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;background-color:rgb(248,248,248);white-space:pre;overflow:auto;border-radius:3px;border:1px solid rgb(204,204,204);padding:0.5em 0.7em;display:block!important">extension MyError: Error { ... }
func foo() throws(MyError) -> MyResult<span style="font-size:0.85em">
</span></code></pre>
<p style="margin:0px 0px 1.2em!important">It’s conservative and
prevents visual ambiguity with extra parentheses.</p>
<p style="margin:0px 0px 1.2em!important">If we (somewhat) agree on
this, then submitting a proposal will be trivial.</p>
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