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Given a method signature like this: func foo<E: Error>( operation: @escaping () throws(E) -> Void, handler: @escaping (_ error: E) -> Void ) is there a way to make the call site see the concrete Error type when calling this? The compiler makes it any Error inside the handler closure.
Apr 21, 2025, 7:49 PM
{
"uri": "at://did:plc:dnhprv4s4ctbua7d6nqlzmhb/app.bsky.feed.post/3lndwpge7e22e",
"cid": "bafyreibewosycnkzmrpeabjejxtdmstdlie5vakwvvjpzqgajyjhyq544u",
"value": {
"text": "Given a method signature like this:\nfunc foo<E: Error>(\n operation: @escaping () throws(E) -> Void,\n handler: @escaping (_ error: E) -> Void\n)\n\nis there a way to make the call site see the concrete Error type when calling this? The compiler makes it any Error inside the handler closure.",
"$type": "app.bsky.feed.post",
"langs": [
"cs"
],
"createdAt": "2025-04-21T19:49:33.256Z"
}
}