fs/io/FileOutputStream: add "noexcept"

src/fs/io/FileOutputStream.cxx

@@ -123,7 +123,7 @@ FileOutputStream::Commit()
 }
 
 void
-FileOutputStream::Cancel()
+FileOutputStream::Cancel() noexcept
 {
 	assert(IsDefined());
 
@@ -243,7 +243,7 @@ FileOutputStream::Commit()
 }
 
 void
-FileOutputStream::Cancel()
+FileOutputStream::Cancel() noexcept
 {
 	assert(IsDefined());
 

src/fs/io/FileOutputStream.hxx

@@ -100,13 +100,13 @@ private:
 public:
 	explicit FileOutputStream(Path _path, Mode _mode=Mode::CREATE);
 
-	~FileOutputStream() {
+	~FileOutputStream() noexcept {
 		if (IsDefined())
 			Cancel();
 	}
 
 public:
-	Path GetPath() const {
+	Path GetPath() const noexcept {
 		return path;
 	}
 
@@ -117,13 +117,13 @@ public:
 	void Write(const void *data, size_t size) override;
 
 	void Commit();
-	void Cancel();
+	void Cancel() noexcept;
 
 private:
 	void OpenCreate(bool visible);
 	void OpenAppend(bool create);
 
-	bool Close() {
+	bool Close() noexcept {
 		assert(IsDefined());
 
 #ifdef _WIN32
@@ -136,13 +136,13 @@ private:
 	}
 
 #ifdef _WIN32
-	bool SeekEOF() {
+	bool SeekEOF() noexcept {
 		return SetFilePointer(handle, 0, nullptr,
 				      FILE_END) != 0xffffffff;
 	}
 #endif
 
-	bool IsDefined() const {
+	bool IsDefined() const noexcept {
 #ifdef _WIN32
 		return handle != INVALID_HANDLE_VALUE;
 #else