Add Objective-C version

Firestore/Source/API/FIRInterface.mm

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+#import "Firestore/Source/Public/FirebaseFirestore/FIRInterface.h"
+
+#import "Firestore/core/src/api/used_by_objective_c.h"
+#include "Firestore/core/src/util/string_apple.h"
+
+using firebase::firestore::util::MakeString;
+
+NS_ASSUME_NONNULL_BEGIN
+
+@implementation FIRInterface
+
++ (void)print:(NSString *)content {
+  CppInterfaceCalledByObjectiveC::print(MakeString(content));
+}
+
+@end
+
+NS_ASSUME_NONNULL_END

Firestore/Source/Public/FirebaseFirestore/FIRInterface.h

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface FIRInterface : NSObject
+
+#pragma mark - Create Filter
+
++ (void)print:(NSString *)content;
+
+@end
+
+NS_ASSUME_NONNULL_END

Firestore/Swift/Source/SwiftAPI/SwiftCppAPI.swift

@@ -18,8 +18,8 @@
   @_exported import FirebaseFirestoreCpp
 #endif // SWIFT_PACKAGE
 
-public class SwiftCppWrapper {
+public class SwiftCallingCpp {
   public init(_ value: String) {
-    _ = UsedBySwift(std.string(value))
+    CppInterfaceCalledBySwift.print(std.string(value))
   }
 }

Firestore/core/src/api/used_by_objective_c.cc

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "used_by_objective_c.h"
+#include <iostream>
+
+void CppInterfaceCalledByObjectiveC::print(std::string content) {
+  std::cout << "C++ function runs with value: " << content << std::endl;
+}

Firestore/core/src/api/used_by_objective_c.h

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef FIREBASE_USED_BY_SWIFT_H
+#define FIREBASE_USED_BY_SWIFT_H
+
+#include <string>
+
+class CppInterfaceCalledByObjectiveC {
+ public:
+  static void print(std::string content);
+};
+
+#endif  // FIREBASE_USED_BY_SWIFT_H

Firestore/core/swift/include/used_by_swift.h

@@ -19,9 +19,9 @@
 
 #include <string>
 
-class UsedBySwift {
+class CppInterfaceCalledBySwift {
  public:
-  explicit UsedBySwift(std::string content);
+  static void print(std::string content);
 };
 
 #endif  // FIREBASE_USED_BY_SWIFT_H

Firestore/core/swift/src/used_by_swift.cc

@@ -17,6 +17,6 @@
 #include "../include/used_by_swift.h"
 #include <iostream>
 
-UsedBySwift::UsedBySwift(std::string content) {
-  std::cout << "ctor runs with value: " << content << std::endl;
+void CppInterfaceCalledBySwift::print(std::string content) {
+  std::cout << "C++ function runs with value: " << content << std::endl;
 }