java/*: add noexcept

src/java/Ref.hxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010-2011 Max Kellermann <max.kellermann@gmail.com>
+ * Copyright 2010-2018 Max Kellermann <max.kellermann@gmail.com>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -49,23 +49,25 @@ namespace Java {
 		/**
 		 * The local reference is obtained by the caller.
 		 */
-		LocalRef(JNIEnv *_env, T _value):env(_env), value(_value) {
+		LocalRef(JNIEnv *_env, T _value) noexcept
+			:env(_env), value(_value)
+		{
 			assert(env != nullptr);
 			assert(value != nullptr);
 		}
 
-		~LocalRef() {
+		~LocalRef() noexcept {
 			env->DeleteLocalRef(value);
 		}
 
 		LocalRef(const LocalRef &other) = delete;
 		LocalRef &operator=(const LocalRef &other) = delete;
 
-		T Get() const {
+		T Get() const noexcept {
 			return value;
 		}
 
-		operator T() const {
+		operator T() const noexcept {
 			return value;
 		}
 	};
@@ -84,14 +86,16 @@ namespace Java {
 		 */
 		GlobalRef() = default;
 
-		GlobalRef(JNIEnv *env, T _value):value(_value) {
+		GlobalRef(JNIEnv *env, T _value) noexcept
+			:value(_value)
+		{
 			assert(env != nullptr);
 			assert(value != nullptr);
 
 			value = (T)env->NewGlobalRef(value);
 		}
 
-		~GlobalRef() {
+		~GlobalRef() noexcept {
 			GetEnv()->DeleteGlobalRef(value);
 		}
 
@@ -102,17 +106,17 @@ namespace Java {
 		 * Sets the object, ignoring the previous value.  This is only
 		 * allowed once after the default constructor was used.
 		 */
-		void Set(JNIEnv *env, T _value) {
+		void Set(JNIEnv *env, T _value) noexcept {
 			assert(_value != nullptr);
 
 			value = (T)env->NewGlobalRef(_value);
 		}
 
-		T Get() const {
+		T Get() const noexcept {
 			return value;
 		}
 
-		operator T() const {
+		operator T() const noexcept {
 			return value;
 		}
 	};
@@ -129,12 +133,12 @@ namespace Java {
 		T value;
 
 	public:
-		constexpr TrivialRef() {};
+		TrivialRef() = default;
 
 		TrivialRef(const TrivialRef &other) = delete;
 		TrivialRef &operator=(const TrivialRef &other) = delete;
 
-		bool IsDefined() const {
+		bool IsDefined() const noexcept {
 			return value != nullptr;
 		}
 
@@ -142,7 +146,7 @@ namespace Java {
 		 * Obtain a global reference on the specified object and store it.
 		 * This object must not be set already.
 		 */
-		void Set(JNIEnv *env, T _value) {
+		void Set(JNIEnv *env, T _value) noexcept {
 			assert(value == nullptr);
 			assert(_value != nullptr);
 
@@ -152,7 +156,7 @@ namespace Java {
 		/**
 		 * Release the global reference and clear this object.
 		 */
-		void Clear(JNIEnv *env) {
+		void Clear(JNIEnv *env) noexcept {
 			assert(value != nullptr);
 
 			env->DeleteGlobalRef(value);
@@ -163,16 +167,16 @@ namespace Java {
 		 * Release the global reference and clear this object.  It is
 		 * allowed to call this method without ever calling Set().
 		 */
-		void ClearOptional(JNIEnv *env) {
+		void ClearOptional(JNIEnv *env) noexcept {
 			if (value != nullptr)
 				Clear(env);
 		}
 
-		T Get() const {
+		T Get() const noexcept {
 			return value;
 		}
 
-		operator T() const {
+		operator T() const noexcept {
 			return value;
 		}
 	};