{
  "$type": "site.standard.document",
  "bskyPostRef": {
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    "uri": "at://did:plc:ivbknywyskln22er3nkssdhl/app.bsky.feed.post/3mpn557g7vlz2"
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  "path": "/t/traits-for-function-items/22815#post_9",
  "publishedAt": "2026-07-02T02:11:20.000Z",
  "site": "https://internals.rust-lang.org",
  "tags": [
    "Implementing traits on function pointers - #2 by steffahn - help - The Rust Programming Language Forum",
    "something like this",
    "specialization",
    "@steffahn"
  ],
  "textContent": "alice:\n\n> convenience holes\n\nSame convenience holes experienced here.\n\nSuggest Implementing traits on function pointers - #2 by steffahn - help - The Rust Programming Language Forum ---> \" A possible workaround, using `unsafe` code, could be to check for a zero-sized and `Copy` type that implements `Fn`. Playing around in a playground got me something like this. This could be used to implement your trait. It seems difficult to _also_ still support function pointers without specialization\" -- thanks to @steffahn.\nI did _not_ digest it fully yet, but it does allow to implement a trait/receiver function on a function _item_ type.",
  "title": "Traits for function items"
}