Merge #10563

10563: feat: Make "Generate getter" assist use semantic info r=agluszak a=agluszak

This PR makes "Generate getter" assist use semantic info instead of dealing with types encoded as strings.
Getters for types which are:
- `Copy` no longer return references
- `AsRef<str>` (i.e. `String`) return `&str` (instead of `&String`)
- `AsRef<[T]>` (i.e. `Vec<T>`) return `&[T]` (instead of `&Vec<T>`)
- `AsRef<T>` (i.e. `Box<T>`) return `&T` (instead of `&Box<T>`)
- `Option<T>` return `Option<&T>` (instead of `&Option<T>`)
- `Result<T, E>` return `Result<&T, &E>` (instead of `&Result<T, E>`)

String, Vec, Box and Option were previously handled as special cases.

Closes #10295


Co-authored-by: Andrzej Głuszak <gluszak.andrzej@gmail.com>

crates/test_utils/src/minicore.rs

@@ -35,6 +35,7 @@
 //!     fmt: result
 //!     bool_impl: option, fn
 //!     add:
+//!     as_ref: sized
 
 pub mod marker {
     // region:sized
@@ -117,8 +118,9 @@ pub mod clone {
 }
 // endregion:clone
 
-// region:from
+
 pub mod convert {
+    // region:from
     pub trait From<T>: Sized {
         fn from(_: T) -> Self;
     }
@@ -140,8 +142,14 @@ pub mod convert {
             t
         }
     }
+    // endregion:from
+
+    // region:as_ref
+    pub trait AsRef<T: ?Sized> {
+        fn as_ref(&self) -> &T;
+    }
+    // endregion:as_ref
 }
-// endregion:from
 
 pub mod ops {
     // region:coerce_unsized
@@ -613,6 +621,7 @@ pub mod prelude {
             cmp::{Eq, PartialEq},               // :eq
             cmp::{Ord, PartialOrd},             // :ord
             convert::{From, Into},              // :from
+            convert::AsRef,                     // :as_ref
             default::Default,                   // :default
             iter::{IntoIterator, Iterator},     // :iterator
             macros::builtin::derive,            // :derive