Remove generics from NSValue, and add NSNumber

Author: madsmtm

objc2/CHANGELOG_FOUNDATION.md

@@ -9,15 +9,21 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ## Unreleased - YYYY-MM-DD
 
 ### Added
+* Added `NSNumber`.
 * Implement `UnwindSafe` and `RefUnwindSafe` for all objects.
 * Implemented `IntoIterator` for references to `NSArray`, `NSMutableArray`,
   `NSData` and `NSMutableData`.
 * Implemented `Extend` for `NSMutableArray`.
 * Add extra `Extend<&u8>` impl for `NSMutableData`.
+* Added function `NSValue::contains_encoding` for determining if the encoding
+  of the `NSValue` matches the encoding of the given type.
 
 ### Changed
 * **BREAKING**: Moved from external crate `objc2_foundation` into
   `objc2::foundation`.
+* **BREAKING**: Made `NSValue` not generic any more. While we loose some
+  type-safety from this, it makes `NSValue` much more useful in the real
+  world!
 
 ### Fixed
 * Made `Debug` impls for all objects print something useful.

objc2/src/foundation/array.rs

@@ -243,7 +243,7 @@ mod tests {
     use alloc::vec::Vec;
 
     use super::*;
-    use crate::foundation::{NSString, NSValue};
+    use crate::foundation::{NSNumber, NSString};
     use crate::rc::autoreleasepool;
 
     fn sample_array(len: usize) -> Id<NSArray<NSObject, Owned>, Owned> {
@@ -254,10 +254,10 @@ mod tests {
         NSArray::from_vec(vec)
     }
 
-    fn sample_number_array(len: u8) -> Id<NSArray<NSValue<u8>, Shared>, Shared> {
+    fn sample_number_array(len: u8) -> Id<NSArray<NSNumber, Shared>, Shared> {
         let mut vec = Vec::with_capacity(len as usize);
         for i in 0..len {
-            vec.push(NSValue::new(i));
+            vec.push(NSNumber::new_u8(i));
         }
         NSArray::from_vec(vec)
     }

objc2/src/foundation/enumerator.rs

@@ -168,29 +168,29 @@ impl<'a, C: NSFastEnumeration + ?Sized> Iterator for NSFastEnumerator<'a, C> {
 #[cfg(test)]
 mod tests {
     use super::NSFastEnumeration;
-    use crate::foundation::{NSArray, NSValue};
+    use crate::foundation::{NSArray, NSNumber};
 
     #[test]
     fn test_enumerator() {
-        let vec = (0usize..4).map(NSValue::new).collect();
+        let vec = (0..4).map(NSNumber::new_usize).collect();
         let array = NSArray::from_vec(vec);
 
         let enumerator = array.iter();
         assert_eq!(enumerator.count(), 4);
 
         let enumerator = array.iter();
-        assert!(enumerator.enumerate().all(|(i, obj)| obj.get() == i));
+        assert!(enumerator.enumerate().all(|(i, obj)| obj.as_usize() == i));
     }
 
     #[test]
     fn test_fast_enumerator() {
-        let vec = (0usize..4).map(NSValue::new).collect();
+        let vec = (0..4).map(NSNumber::new_usize).collect();
         let array = NSArray::from_vec(vec);
 
         let enumerator = array.iter_fast();
         assert_eq!(enumerator.count(), 4);
 
         let enumerator = array.iter_fast();
-        assert!(enumerator.enumerate().all(|(i, obj)| obj.get() == i));
+        assert!(enumerator.enumerate().all(|(i, obj)| obj.as_usize() == i));
     }
 }

objc2/src/foundation/mod.rs

@@ -39,6 +39,7 @@ pub use self::mutable_array::NSMutableArray;
 pub use self::mutable_attributed_string::NSMutableAttributedString;
 pub use self::mutable_data::NSMutableData;
 pub use self::mutable_string::NSMutableString;
+pub use self::number::NSNumber;
 pub use self::object::NSObject;
 pub use self::process_info::NSProcessInfo;
 pub use self::range::NSRange;
@@ -77,6 +78,7 @@ mod mutable_array;
 mod mutable_attributed_string;
 mod mutable_data;
 mod mutable_string;
+mod number;
 mod object;
 mod process_info;
 mod range;
@@ -141,6 +143,7 @@ mod tests {
         assert_auto_traits::<NSMutableAttributedString>();
         assert_auto_traits::<NSMutableData>();
         assert_auto_traits::<NSMutableString>();
+        assert_auto_traits::<NSNumber>();
         // assert_auto_traits::<NSObject>(); // Intentional
         assert_auto_traits::<NSProcessInfo>();
         assert_auto_traits::<NSRange>();
@@ -149,7 +152,7 @@ mod tests {
         assert_auto_traits::<NSThread>();
         #[cfg(not(macos_10_7))]
         assert_auto_traits::<NSUUID>();
-        assert_auto_traits::<NSValue<i32>>();
+        // assert_auto_traits::<NSValue>(); // Intentional
         assert_unwindsafe::<NSZone>(); // Intentional
     }
 }