C++ 17 style nested namespaces (#1326)

Summary:
X-link: https://github.com/facebook/react-native/pull/38304

Pull Request resolved: https://github.com/facebook/yoga/pull/1326

For better readability

Reviewed By: christophpurrer

Differential Revision: D47384926

fbshipit-source-id: 2f60d50a185331b3624d45d1fc45f98d504b3034

java/jni/ScopedGlobalRef.h

@@ -12,9 +12,7 @@
 #include <type_traits>
 #include "corefunctions.h"
 
-namespace facebook {
-namespace yoga {
-namespace vanillajni {
+namespace facebook::yoga::vanillajni {
 
 /**
  * ScopedGlobalRef is a sort of smart reference that allows us to control the
@@ -132,6 +130,4 @@ ScopedGlobalRef<T> make_global_ref(T globalRef) {
   return ScopedGlobalRef<T>(globalRef);
 }
 
-} // namespace vanillajni
-} // namespace yoga
-} // namespace facebook
+} // namespace facebook::yoga::vanillajni

java/jni/ScopedLocalRef.h

@@ -15,9 +15,7 @@
 #include <cstddef>
 #include <type_traits>
 
-namespace facebook {
-namespace yoga {
-namespace vanillajni {
+namespace facebook::yoga::vanillajni {
 
 /**
  * ScopedLocalRef is a sort of smart reference that allows us to control the
@@ -132,6 +130,4 @@ ScopedLocalRef<T> make_local_ref(JNIEnv* env, T localRef) {
   return ScopedLocalRef<T>(env, localRef);
 }
 
-} // namespace vanillajni
-} // namespace yoga
-} // namespace facebook
+} // namespace facebook::yoga::vanillajni

java/jni/YogaJniException.cpp

@@ -10,9 +10,7 @@
 #include "YogaJniException.h"
 #include "common.h"
 
-namespace facebook {
-namespace yoga {
-namespace vanillajni {
+namespace facebook::yoga::vanillajni {
 
 YogaJniException::YogaJniException() {
   jclass cl = getCurrentEnv()->FindClass("java/lang/RuntimeException");
@@ -47,6 +45,5 @@ ScopedLocalRef<jthrowable> YogaJniException::getThrowable() const noexcept {
       getCurrentEnv(),
       static_cast<jthrowable>(getCurrentEnv()->NewLocalRef(throwable_.get())));
 }
-} // namespace vanillajni
-} // namespace yoga
-} // namespace facebook
+
+} // namespace facebook::yoga::vanillajni

java/jni/YogaJniException.h

@@ -9,9 +9,7 @@
 #include <string>
 #include "common.h"
 
-namespace facebook {
-namespace yoga {
-namespace vanillajni {
+namespace facebook::yoga::vanillajni {
 /**
  * This class wraps a Java exception (jthrowable) into a C++ exception; A global
  * reference to Java exception (jthrowable) is made so that the exception object
@@ -33,6 +31,5 @@ public:
 private:
   ScopedGlobalRef<jthrowable> throwable_;
 };
-} // namespace vanillajni
-} // namespace yoga
-} // namespace facebook
+
+} // namespace facebook::yoga::vanillajni

java/jni/common.cpp

@@ -7,9 +7,7 @@
 
 #include "common.h"
 
-namespace facebook {
-namespace yoga {
-namespace vanillajni {
+namespace facebook::yoga::vanillajni {
 
 void registerNatives(
     JNIEnv* env,
@@ -109,6 +107,5 @@ ScopedGlobalRef<jthrowable> newGlobalRef(JNIEnv* env, jthrowable obj) {
 
   return make_global_ref(result);
 }
-} // namespace vanillajni
-} // namespace yoga
-} // namespace facebook
+
+} // namespace facebook::yoga::vanillajni

java/jni/common.h

@@ -9,9 +9,7 @@
 #include "ScopedGlobalRef.h"
 #include "ScopedLocalRef.h"
 
-namespace facebook {
-namespace yoga {
-namespace vanillajni {
+namespace facebook::yoga::vanillajni {
 
 /**
  * Registers a set of methods for a JNI class. Aborts if registration fails.
@@ -74,6 +72,5 @@ ScopedLocalRef<jobject> callStaticObjectMethod(
 ScopedGlobalRef<jobject> newGlobalRef(JNIEnv* env, jobject obj);
 
 ScopedGlobalRef<jthrowable> newGlobalRef(JNIEnv* env, jthrowable obj);
-} // namespace vanillajni
-} // namespace yoga
-} // namespace facebook
+
+} // namespace facebook::yoga::vanillajni

java/jni/corefunctions.cpp

@@ -9,9 +9,7 @@
 #include "macros.h"
 #include "YogaJniException.h"
 
-namespace facebook {
-namespace yoga {
-namespace vanillajni {
+namespace facebook::yoga::vanillajni {
 
 namespace {
 JavaVM* globalVm = NULL;
@@ -90,6 +88,4 @@ void assertNoPendingJniExceptionIf(JNIEnv* env, bool condition) {
   throw YogaJniException();
 }
 
-} // namespace vanillajni
-} // namespace yoga
-} // namespace facebook
+} // namespace facebook::yoga::vanillajni

java/jni/corefunctions.h

@@ -10,9 +10,7 @@
 #include <jni.h>
 #include <cstddef>
 
-namespace facebook {
-namespace yoga {
-namespace vanillajni {
+namespace facebook::yoga::vanillajni {
 
 /**
  * This method has to be called before using the vanillajni library. This method
@@ -49,6 +47,4 @@ void assertNoPendingJniException(JNIEnv* env);
 
 void assertNoPendingJniExceptionIf(JNIEnv* env, bool condition);
 
-} // namespace vanillajni
-} // namespace yoga
-} // namespace facebook
+} // namespace facebook::yoga::vanillajni