lib/icu/Util: use std::unique_ptr

src/lib/icu/Util.cxx

@@ -26,6 +26,8 @@
 
 #include <unicode/ustring.h>
 
+#include <memory>
+
 #include <assert.h>
 #include <string.h>
 
@@ -58,17 +60,16 @@ UCharToUTF8(ConstBuffer<UChar> src)
 	/* worst-case estimate */
 	size_t dest_capacity = 4 * src.size;
 
-	char *dest = new char[dest_capacity + 1];
+	std::unique_ptr<char[]> dest(new char[dest_capacity + 1]);
 
 	UErrorCode error_code = U_ZERO_ERROR;
 	int32_t dest_length;
-	u_strToUTF8(dest, dest_capacity, &dest_length, src.data, src.size,
+	u_strToUTF8(dest.get(), dest_capacity, &dest_length,
+		    src.data, src.size,
 		    &error_code);
-	if (U_FAILURE(error_code)) {
-		delete[] dest;
+	if (U_FAILURE(error_code))
 		return nullptr;
-	}
 
 	dest[dest_length] = 0;
-	return AllocatedString<>::Donate(dest);
+	return AllocatedString<>::Donate(dest.release());
 }