Fix remaining compilation errors

Doc tests still don't work

Author: madsmtm

objc2/examples/basic_usage.rs

@@ -1,5 +1,6 @@
+use objc2::foundation::{NSArray, NSDictionary, NSObject};
+use objc2::ns_string;
 use objc2::rc::autoreleasepool;
-use objc2_foundation::{ns_string, NSArray, NSDictionary, NSObject};
 
 fn main() {
     // Create and compare NSObjects

objc2/examples/class_with_lifetime.rs

@@ -3,11 +3,11 @@ use std::marker::PhantomData;
 use std::sync::Once;
 
 use objc2::declare::ClassBuilder;
+use objc2::foundation::NSObject;
 use objc2::rc::{Id, Owned, Shared};
 use objc2::runtime::{Class, Object, Sel};
 use objc2::{msg_send, msg_send_id, sel};
 use objc2::{Encoding, Message, RefEncode};
-use objc2_foundation::NSObject;
 
 #[repr(C)]
 pub struct MyObject<'a> {

objc2/examples/custom_class.rs

@@ -1,11 +1,11 @@
 use std::sync::Once;
 
 use objc2::declare::{ClassBuilder, Ivar, IvarType};
+use objc2::foundation::NSObject;
 use objc2::rc::{Id, Owned};
 use objc2::runtime::{Class, Object, Sel};
 use objc2::{msg_send, msg_send_id, sel};
 use objc2::{Encoding, Message, RefEncode};
-use objc2_foundation::NSObject;
 
 struct NumberIvar;
 unsafe impl IvarType for NumberIvar {

objc2/examples/declaration.rs

@@ -1,11 +1,11 @@
 #[cfg(all(feature = "apple", target_os = "macos"))]
 use objc2::{
+    declare_class, extern_class,
+    foundation::NSObject,
     msg_send, msg_send_id,
     rc::{Id, Shared},
     runtime::{Bool, Object},
 };
-#[cfg(all(feature = "apple", target_os = "macos"))]
-use objc2_foundation::{declare_class, extern_class, NSObject};
 
 #[cfg(all(feature = "apple", target_os = "macos"))]
 #[link(name = "AppKit", kind = "framework")]

objc2/examples/nspasteboard.rs

@@ -5,13 +5,12 @@
 use std::mem::ManuallyDrop;
 use std::ops::{Deref, DerefMut};
 
+use objc2::foundation::{NSArray, NSDictionary, NSInteger, NSObject, NSString};
 use objc2::rc::{Id, Shared};
 use objc2::runtime::{Class, Object};
 use objc2::{msg_send, msg_send_bool, msg_send_id};
 use objc2::{Encoding, Message, RefEncode};
 
-use objc2_foundation::{NSArray, NSDictionary, NSInteger, NSObject, NSString};
-
 type NSPasteboardType = NSString;
 type NSPasteboardReadingOptionKey = NSString;
 

objc2/examples/nsspeechsynthesizer.rs

@@ -6,13 +6,12 @@ use std::ops::{Deref, DerefMut};
 use std::thread;
 use std::time::Duration;
 
+use objc2::foundation::{NSObject, NSString};
 use objc2::rc::{Id, Owned};
 use objc2::runtime::Class;
 use objc2::{msg_send, msg_send_bool, msg_send_id};
 use objc2::{Encoding, Message, RefEncode};
 
-use objc2_foundation::{NSObject, NSString};
-
 #[cfg(all(feature = "apple", target_os = "macos"))]
 #[link(name = "AppKit", kind = "framework")]
 extern "C" {}

objc2/src/foundation/array.rs

@@ -247,7 +247,7 @@ mod tests {
     use objc2::rc::autoreleasepool;
 
     use super::*;
-    use crate::{NSString, NSValue};
+    use crate::foundation::{NSString, NSValue};
 
     fn sample_array(len: usize) -> Id<NSArray<NSObject, Owned>, Owned> {
         let mut vec = Vec::with_capacity(len);

objc2/src/foundation/dictionary.rs

@@ -176,7 +176,7 @@ mod tests {
     use objc2::rc::{autoreleasepool, Id, Shared};
 
     use super::NSDictionary;
-    use crate::{NSObject, NSString};
+    use crate::foundation::{NSObject, NSString};
 
     fn sample_dict(key: &str) -> Id<NSDictionary<NSString, NSObject>, Shared> {
         let string = NSString::from_str(key);

objc2/src/foundation/enumerator.rs

@@ -168,7 +168,7 @@ impl<'a, C: NSFastEnumeration + ?Sized> Iterator for NSFastEnumerator<'a, C> {
 #[cfg(test)]
 mod tests {
     use super::NSFastEnumeration;
-    use crate::{NSArray, NSValue};
+    use crate::foundation::{NSArray, NSValue};
 
     #[test]
     fn test_enumerator() {

objc2/src/foundation/mutable_array.rs

@@ -229,7 +229,7 @@ mod tests {
     use objc2::rc::autoreleasepool;
 
     use super::*;
-    use crate::NSString;
+    use crate::foundation::NSString;
 
     #[test]
     fn test_adding() {