From ae6b677f9abddcd8a95eaab3c8ac804ebe4b9a07 Mon Sep 17 00:00:00 2001
From: Pavel Emelyanov <xemul@scylladb.com>
Date: Thu, 8 Apr 2021 13:49:01 +0300
Subject: [PATCH] partition_snapshot_row-cursor: Add const consume_row()
 version

It's the same as the existing one, but doesn't modify
anything (cursor and pointing rows_entry's) and calls
consumer with const row reference.

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
---
 partition_snapshot_row_cursor.hh | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/partition_snapshot_row_cursor.hh b/partition_snapshot_row_cursor.hh
index 8807ecf9ba..571ebd3c7a 100644
--- a/partition_snapshot_row_cursor.hh
+++ b/partition_snapshot_row_cursor.hh
@@ -371,6 +371,15 @@ public:
         }
     }
 
+    // Can be called only when cursor is valid and pointing at a row.
+    template <typename Consumer>
+    requires std::is_invocable_v<Consumer, const deletable_row&>
+    void consume_row(Consumer&& consumer) const {
+        for (const position_in_version& v : _current_row) {
+            consumer(v.it->row());
+        }
+    }
+
     // Returns memory footprint of row entries under the cursor.
     // Can be called only when cursor is valid and pointing at a row.
     size_t memory_usage() const {