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.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>Hi there,</p>
<p>I’m interested if this idea has some potential future in Swift or not.</p>
<p>Currently RawRepresentable enums accept only a subset of literal types like String, Character and the Integer family (<code>enum Name : String { … }</code>).</p>
<p>Sometimes this is not enough for my use-case and I wish I could feed my enums with other Hashable types!</p>
<p>As a workaround I can create a custom struct or even a class and conform it to <code>RawRepresentable</code> and fake an enum with some static variables (similar to what is done with <code>OptionSet</code> types).</p>
<p>The problem there is that I cannot use the same switch pattern matching like with enums. I’d wish either enums could accept Hashable types (maybe with some restriction) or the existence on a protocol to build custom enum-like types with strucs/classes and use the same switch pattern matching.</p>
<pre><code class="swift">struct A : Hashable { /* implement everything */ }
// Variant 1:
enum Test : A {
case something = A(rawValue: A(value: "something"))
case nothing = A(rawValue: A(value: "nothing"))
}
// Variant 2:
protocol SomeFancyName : RawRepresentable { … }
struct Test : SomeFancyName {
let rawValue: A
init?(rawValue: A) {
// Implement + reject unwanted `A`s
}
static let something = A(rawValue: A(value: "something"))
static let nothing = A(rawValue: A(value: "nothing"))
}
let value = Test.something
switch value {
case .something:
// handle
case .nothing:
// handle
// Because of `SomeFancyName` the switch can use enum-like pattern matching + does not need the `default` case when all cases are present
}
</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_1475522853802483200" class="bloop_sign"><div style="font-family:helvetica,arial;font-size:13px">-- <br>Adrian Zubarev<br>Sent with Airmail</div></div></div><div class="bloop_markdown"><p></p></div></body></html>