add '+' to parsing in print format

Signed-off-by: Steven Rostedt <srostedt@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/parse-events.c b/parse-events.c
index ef393e8..1da9433 100644
--- a/parse-events.c
+++ b/parse-events.c
@@ -2108,6 +2108,9 @@ static unsigned long long eval_num_arg(void *data, int size,
                 case '-':
                         val = left - right;
                         break;
+                case '+':
+                        val = left + right;
+                        break;
                 default:
                         die("unknown op '%s'", arg->op.op);
                 }