From 8dacec589dd22d8a75b6d4e6a23cde51bbfaeb02 Mon Sep 17 00:00:00 2001
From: Kefu Chai <kefu.chai@scylladb.com>
Date: Thu, 21 Mar 2024 13:38:16 +0800
Subject: [PATCH] cql3: add fmt::formatter for cql3_type and cql3_type::raw

before this change, we rely on the default-generated fmt::formatter
created from operator<<, but fmt v10 dropped the default-generated
formatter.

in this change, `fmt::formatter<>` is added for following classes:

* `cql3::cql3_type`
* `cql3::cql3_type::raw`

Refs #13245

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>

Closes scylladb/scylladb#17945
---
 cql3/cql3_type.hh | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/cql3/cql3_type.hh b/cql3/cql3_type.hh
index 911e1aeac0..17739c1ca6 100644
--- a/cql3/cql3_type.hh
+++ b/cql3/cql3_type.hh
@@ -363,3 +363,17 @@ inline bool operator==(const cql3_type& a, const cql3_type& b) {
 #endif
 
 }
+
+template <>
+struct fmt::formatter<cql3::cql3_type>: fmt::formatter<std::string_view> {
+    auto format(const cql3::cql3_type& t, fmt::format_context& ctx) const {
+        return formatter<std::string_view>::format(format_as(t), ctx);
+    }
+};
+
+template <std::derived_from<cql3::cql3_type::raw> T>
+struct fmt::formatter<T>: fmt::formatter<std::string_view> {
+    auto format(const T& t, fmt::format_context& ctx) const {
+        return formatter<std::string_view>::format(format_as(t), ctx);
+    }
+};