{
  "$type": "site.standard.document",
  "bskyPostRef": {
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    "uri": "at://did:plc:ivbknywyskln22er3nkssdhl/app.bsky.feed.post/3mp2qhwgipve2"
  },
  "path": "/t/a-read-only-no-alias-reference/24410#post_13",
  "publishedAt": "2026-06-24T17:59:44.000Z",
  "site": "https://internals.rust-lang.org",
  "textContent": "chrefr:\n\n> It is already possible to do that:\n\nThis doesn't quite work:\n\n\n        let a = 42u8;\n        let r = ExclusiveReadOnly::new(&a);\n\n\n\n    error[E0308]: mismatched types\n      --> src/main.rs:19:36\n       |\n    19 |     let r = ExclusiveReadOnly::new(&a);\n       |             ---------------------- ^^ types differ in mutability\n       |             |\n       |             arguments to this function are incorrect\n\n\n\n        let a = 42u8;\n        let r = ExclusiveReadOnly::new(&mut a);\n\n\n\n    error[E0596]: cannot borrow `a` as mutable, as it is not declared as mutable\n      --> src/main.rs:19:36\n       |\n    19 |     let r = ExclusiveReadOnly::new(&mut a);\n       |                                    ^^^^^^ cannot borrow as mutable\n       |\n",
  "title": "A read only no alias reference"
}