Remove unnecessary bounds on object implementations

These are probably not necessary, since we control how the objects are created.

Though it does prevent users from accidentally returning e.g. `&NSValue<&u8>` (when they intended `&NSValue<u8>`) in a message send, it might also be overly restrictive.

Author: madsmtm

objc2-foundation/CHANGELOG.md

@@ -16,6 +16,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ### Changed
 * **BREAKING**: Made some creation methods a bit less generic (e.g.
   `INSDictionary::from_keys_and_objects` now always returns `Id<_, Shared>`).
+* Relax bounds on generic `INSObject` impls.
 
 ### Removed
 * **BREAKING**: Removed associated `Ownership` type from `INSObject`; instead,

objc2-foundation/src/array.rs

@@ -172,7 +172,6 @@ object!(
     unsafe pub struct NSArray<T, O: Ownership> {
         item: PhantomData<Id<T, O>>,
     }
-    impl where T: INSObject
 );
 
 unsafe impl<T: INSObject, O: Ownership> INSArray for NSArray<T, O> {
@@ -318,7 +317,6 @@ object!(
     unsafe pub struct NSMutableArray<T, O: Ownership> {
         item: PhantomData<Id<T, O>>,
     }
-    impl where T: INSObject
 );
 
 unsafe impl<T: INSObject, O: Ownership> INSArray for NSMutableArray<T, O> {

objc2-foundation/src/dictionary.rs

@@ -143,9 +143,6 @@ object!(
         key: PhantomData<Id<K, Shared>>,
         obj: PhantomData<Id<V, Owned>>,
     }
-    impl where
-        K: INSObject,
-        V: INSObject,
 );
 
 impl<K: INSObject, V: INSObject> NSDictionary<K, V> {

objc2-foundation/src/macros.rs

@@ -18,7 +18,6 @@ macro_rules! object {
         unsafe $v:vis struct $name:ident<$($t:ident $(: $b:ident)?),*> {
             $($p:ident: $pty:ty,)*
         }
-        $(impl where $($w:tt)+)?
     ) => {
         // TODO: `extern type`
         $(#[$m])*

objc2-foundation/src/value.rs

@@ -73,7 +73,6 @@ object!(
     unsafe pub struct NSValue<T> {
         value: PhantomData<T>,
     }
-    impl where T: 'static
 );
 
 unsafe impl<T: 'static + Copy + Encode> INSValue for NSValue<T> {