Implement ToOwned as an easy way of generically cloning types

objc2-foundation/CHANGELOG.md

@@ -29,6 +29,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 * Added `NSSize`.
 * Added `NSRect`.
 * Implement `Borrow` and `BorrowMut` for all objects.
+* Implement `ToOwned` for copyable types.
 
 ### Changed
 * **BREAKING**: Removed the following helper traits in favor of inherent

objc2-foundation/src/array.rs

@@ -185,6 +185,13 @@ unsafe impl<T: Message> NSMutableCopying for NSArray<T, Shared> {
     type Output = NSMutableArray<T, Shared>;
 }
 
+impl<T: Message> alloc::borrow::ToOwned for NSArray<T, Shared> {
+    type Owned = Id<NSArray<T, Shared>, Shared>;
+    fn to_owned(&self) -> Self::Owned {
+        self.copy()
+    }
+}
+
 unsafe impl<T: Message, O: Ownership> NSFastEnumeration for NSArray<T, O> {
     type Item = T;
 }
@@ -334,6 +341,13 @@ unsafe impl<T: Message> NSMutableCopying for NSMutableArray<T, Shared> {
     type Output = NSMutableArray<T, Shared>;
 }
 
+impl<T: Message> alloc::borrow::ToOwned for NSMutableArray<T, Shared> {
+    type Owned = Id<NSMutableArray<T, Shared>, Owned>;
+    fn to_owned(&self) -> Self::Owned {
+        self.mutable_copy()
+    }
+}
+
 unsafe impl<T: Message, O: Ownership> NSFastEnumeration for NSMutableArray<T, O> {
     type Item = T;
 }

objc2-foundation/src/attributed_string.rs

@@ -118,6 +118,13 @@ unsafe impl NSMutableCopying for NSAttributedString {
     type Output = NSMutableAttributedString;
 }
 
+impl alloc::borrow::ToOwned for NSAttributedString {
+    type Owned = Id<NSAttributedString, Shared>;
+    fn to_owned(&self) -> Self::Owned {
+        self.copy()
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use alloc::string::ToString;

objc2-foundation/src/data.rs

@@ -92,6 +92,13 @@ unsafe impl NSMutableCopying for NSData {
     type Output = NSMutableData;
 }
 
+impl alloc::borrow::ToOwned for NSData {
+    type Owned = Id<NSData, Shared>;
+    fn to_owned(&self) -> Self::Owned {
+        self.copy()
+    }
+}
+
 impl AsRef<[u8]> for NSData {
     fn as_ref(&self) -> &[u8] {
         self.bytes()
@@ -220,6 +227,13 @@ unsafe impl NSMutableCopying for NSMutableData {
     type Output = NSMutableData;
 }
 
+impl alloc::borrow::ToOwned for NSMutableData {
+    type Owned = Id<NSMutableData, Owned>;
+    fn to_owned(&self) -> Self::Owned {
+        self.mutable_copy()
+    }
+}
+
 impl AsRef<[u8]> for NSMutableData {
     fn as_ref(&self) -> &[u8] {
         self.bytes()

objc2-foundation/src/mutable_attributed_string.rs

@@ -74,6 +74,13 @@ unsafe impl NSMutableCopying for NSMutableAttributedString {
     type Output = NSMutableAttributedString;
 }
 
+impl alloc::borrow::ToOwned for NSMutableAttributedString {
+    type Owned = Id<NSMutableAttributedString, Owned>;
+    fn to_owned(&self) -> Self::Owned {
+        self.mutable_copy()
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use alloc::string::ToString;

objc2-foundation/src/mutable_string.rs

@@ -96,6 +96,13 @@ unsafe impl NSMutableCopying for NSMutableString {
     type Output = NSMutableString;
 }
 
+impl alloc::borrow::ToOwned for NSMutableString {
+    type Owned = Id<NSMutableString, Owned>;
+    fn to_owned(&self) -> Self::Owned {
+        self.mutable_copy()
+    }
+}
+
 impl AddAssign<&NSString> for NSMutableString {
     #[inline]
     fn add_assign(&mut self, other: &NSString) {

objc2-foundation/src/string.rs

@@ -1,3 +1,4 @@
+use alloc::borrow::ToOwned;
 use core::cmp;
 use core::ffi::c_void;
 use core::fmt;
@@ -6,7 +7,6 @@ use core::slice;
 use core::str;
 use std::os::raw::c_char;
 
-use alloc::borrow::ToOwned;
 use objc2::ffi;
 use objc2::rc::DefaultId;
 use objc2::rc::{autoreleasepool, AutoreleasePool};
@@ -255,6 +255,13 @@ unsafe impl NSMutableCopying for NSString {
     type Output = NSMutableString;
 }
 
+impl ToOwned for NSString {
+    type Owned = Id<NSString, Shared>;
+    fn to_owned(&self) -> Self::Owned {
+        self.copy()
+    }
+}
+
 impl fmt::Display for NSString {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         // The call to `to_owned` is unfortunate, but is required to work

objc2-foundation/src/uuid.rs

@@ -68,6 +68,13 @@ unsafe impl NSCopying for NSUUID {
     type Output = NSUUID;
 }
 
+impl alloc::borrow::ToOwned for NSUUID {
+    type Owned = Id<NSUUID, Shared>;
+    fn to_owned(&self) -> Self::Owned {
+        self.copy()
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

objc2-foundation/src/value.rs

@@ -83,6 +83,13 @@ unsafe impl<T: 'static> NSCopying for NSValue<T> {
     type Output = NSValue<T>;
 }
 
+impl<T: 'static> alloc::borrow::ToOwned for NSValue<T> {
+    type Owned = Id<NSValue<T>, Shared>;
+    fn to_owned(&self) -> Self::Owned {
+        self.copy()
+    }
+}
+
 impl<T: 'static + Copy + Encode + Ord> Ord for NSValue<T> {
     fn cmp(&self, other: &Self) -> Ordering {
         self.get().cmp(&other.get())