From e4965b16629b2ee1dbfb3697fdca611d22a5d933 Mon Sep 17 00:00:00 2001
From: Pavel Emelyanov <xemul@scylladb.com>
Date: Wed, 25 Aug 2021 15:09:52 +0300
Subject: [PATCH] range_tombstone_list: Conceptualize erase_where()

Just while at this code

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
---
 range_tombstone_list.hh | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/range_tombstone_list.hh b/range_tombstone_list.hh
index 638c148de1..1e53a22830 100644
--- a/range_tombstone_list.hh
+++ b/range_tombstone_list.hh
@@ -186,9 +186,8 @@ public:
     range_tombstone_list difference(const schema& s, const range_tombstone_list& rt_list) const;
     // Erases the range tombstones for which filter returns true.
     template <typename Pred>
+    requires std::is_invocable_r_v<bool, Pred, const range_tombstone&>
     void erase_where(Pred filter) {
-        static_assert(std::is_same<bool, std::result_of_t<Pred(const range_tombstone&)>>::value,
-                      "bad Pred signature");
         auto it = begin();
         while (it != end()) {
             if (filter(*it)) {