tag/Tag: add "noexcept"

src/tag/Tag.cxx

@@ -40,7 +40,7 @@ Tag::Clear() noexcept
 	num_items = 0;
 }
 
-Tag::Tag(const Tag &other)
+Tag::Tag(const Tag &other) noexcept
 	:duration(other.duration), has_playlist(other.has_playlist),
 	 num_items(other.num_items),
 	 items(nullptr)
@@ -64,7 +64,7 @@ Tag::Merge(const Tag &base, const Tag &add) noexcept
 }
 
 std::unique_ptr<Tag>
-Tag::Merge(std::unique_ptr<Tag> base, std::unique_ptr<Tag> add)
+Tag::Merge(std::unique_ptr<Tag> base, std::unique_ptr<Tag> add) noexcept
 {
 	if (add == nullptr)
 		return base;

src/tag/Tag.hxx

@@ -56,9 +56,9 @@ struct Tag {
 	 */
 	Tag() = default;
 
-	Tag(const Tag &other);
+	Tag(const Tag &other) noexcept;
 
-	Tag(Tag &&other)
+	Tag(Tag &&other) noexcept
 		:duration(other.duration), has_playlist(other.has_playlist),
 		 num_items(other.num_items), items(other.items) {
 		other.items = nullptr;
@@ -68,13 +68,13 @@ struct Tag {
 	/**
 	 * Free the tag object and all its items.
 	 */
-	~Tag() {
+	~Tag() noexcept {
 		Clear();
 	}
 
 	Tag &operator=(const Tag &other) = delete;
 
-	Tag &operator=(Tag &&other) {
+	Tag &operator=(Tag &&other) noexcept {
 		duration = other.duration;
 		has_playlist = other.has_playlist;
 		MoveItemsFrom(std::move(other));
@@ -126,7 +126,7 @@ struct Tag {
 	 * @return a newly allocated tag
 	 */
 	static std::unique_ptr<Tag> Merge(std::unique_ptr<Tag> base,
-					  std::unique_ptr<Tag> add);
+					  std::unique_ptr<Tag> add) noexcept;
 
 	/**
 	 * Returns the first value of the specified tag type, or
@@ -155,52 +155,52 @@ struct Tag {
 		friend struct Tag;
 		const TagItem *const*cursor;
 
-		constexpr const_iterator(const TagItem *const*_cursor)
+		constexpr const_iterator(const TagItem *const*_cursor) noexcept
 			:cursor(_cursor) {}
 
 	public:
-		constexpr const TagItem &operator*() const {
+		constexpr const TagItem &operator*() const noexcept {
 			return **cursor;
 		}
 
-		constexpr const TagItem *operator->() const {
+		constexpr const TagItem *operator->() const noexcept {
 			return *cursor;
 		}
 
-		const_iterator &operator++() {
+		const_iterator &operator++() noexcept {
 			++cursor;
 			return *this;
 		}
 
-		const_iterator operator++(int) {
+		const_iterator operator++(int) noexcept {
 			auto result = cursor++;
 			return const_iterator{result};
 		}
 
-		const_iterator &operator--() {
+		const_iterator &operator--() noexcept {
 			--cursor;
 			return *this;
 		}
 
-		const_iterator operator--(int) {
+		const_iterator operator--(int) noexcept {
 			auto result = cursor--;
 			return const_iterator{result};
 		}
 
-		constexpr bool operator==(const_iterator other) const {
+		constexpr bool operator==(const_iterator other) const noexcept {
 			return cursor == other.cursor;
 		}
 
-		constexpr bool operator!=(const_iterator other) const {
+		constexpr bool operator!=(const_iterator other) const noexcept {
 			return cursor != other.cursor;
 		}
 	};
 
-	const_iterator begin() const {
+	const_iterator begin() const noexcept {
 		return const_iterator{items};
 	}
 
-	const_iterator end() const {
+	const_iterator end() const noexcept {
 		return const_iterator{items + num_items};
 	}
 };

test/test_queue_priority.cxx

@@ -8,7 +8,7 @@
 #include <cppunit/ui/text/TestRunner.h>
 #include <cppunit/extensions/HelperMacros.h>
 
-Tag::Tag(const Tag &) {}
+Tag::Tag(const Tag &) noexcept {}
 void Tag::Clear() noexcept {}
 
 static void