change flush to use exceptions instead of error strings

1 files changed, 3 insertions, 2 deletions

diff --git a/src/main/kotlin/ProtocolTranslator.kt b/src/main/kotlin/ProtocolTranslator.kt
index 68dde3e..eb13fc2 100644
--- a/src/main/kotlin/ProtocolTranslator.kt
+++ b/src/main/kotlin/ProtocolTranslator.kt
@@ -43,9 +43,10 @@ interface ProtocolTranslator {
      * Abort a message.
      *
      * @param oldtag The tag of the message that needs to be purged.
-     * @return a possible error.
+     * @throws except.InvalidMessageException if the received message is invalid.
+     * @throws except.RErrorException if the received message is an R-error message.
      */
-    fun flush(oldtag: UShort): String?
+    fun flush(oldtag: UShort)
 
     /**
      * Establish a connection.