Begin work on core:sys/darwin/Foundation

core/sys/darwin/Foundation/NSObject.odin

@@ -0,0 +1,66 @@
+package objc_Foundation
+
+import "core:intrinsics"
+
+methodSignatureForSelector :: proc "c" (obj: ^Object, selector: SEL) -> rawptr {
+	return msgSend(rawptr, obj, "methodSignatureForSelector:", selector)
+}
+
+respondsToSelector :: proc "c" (obj: ^Object, selector: SEL) -> BOOL {
+	return msgSend(BOOL, obj, "respondsToSelector:", selector)
+}
+
+msgSendSafeCheck :: proc "c" (obj: ^Object, selector: SEL) -> BOOL {
+	return respondsToSelector(obj, selector) || methodSignatureForSelector(obj, selector) != nil
+}
+
+
+@(objc_class="NSObject")
+Object :: struct {using _: intrinsics.objc_object}
+
+@(objc_class="NSObject")
+Copying :: struct($T: typeid) {using _: Object}
+
+alloc :: proc($T: typeid) -> ^T where intrinsics.type_is_subtype_of(T, Object) {
+	return msgSend(^T, T, "alloc")
+}
+init :: proc(self: ^$T) -> ^T where intrinsics.type_is_subtype_of(T, Object){
+	return msgSend(^T, self, "init")
+}
+retain :: proc(self: ^$T) -> ^T where intrinsics.type_is_subtype_of(T, Object) {
+	return msgSend(^T, self, "retain")
+}
+release :: proc(self: ^$T) where intrinsics.type_is_subtype_of(T, Object) {
+	msgSend(nil, self, "release")
+}
+retainCount :: proc(self: ^$T) -> UInteger where intrinsics.type_is_subtype_of(T, Object) {
+	return msgSend(UInteger, self, "retainCount")
+}
+
+copy :: proc(self: ^Copying($T)) -> ^T where intrinsics.type_is_subtype_of(T, Object) {
+	return msgSend(^T, self, "copy")
+}
+
+hash :: proc(self: ^Object) -> UInteger {
+	return msgSend(UInteger, self, "hash")
+}
+
+isEqual :: proc(self, pObject: ^Object) -> BOOL {
+	return msgSend(BOOL, self, "isEqual:", pObject)
+}
+
+description :: proc(self: ^Object) -> ^String {
+	return msgSend(^String, self, "description")
+}
+
+debugDescription :: proc(self: ^Object) -> ^String {
+	if msgSendSafeCheck(self, intrinsics.objc_selector_name("debugDescription")) {
+		return msgSend(^String, self, "debugDescription")
+	}
+	return nil
+}
+
+
+@(objc_class="NSCoder")
+Coder :: struct {using _: Object}
+// TODO(bill): Implement all the methods for this massive type