cql3, locator: call fmt::format_to() explicitly

since format_to() is defined included by both fmt and std namepaces,
without specifying which one to use, we'd fail to build with the
standard library which implements std::format_to(). yes, we are
`using namespace std` somewhere.

this change should address the FTBFS with GCC-13.

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

cql3/expr/expression.hh

@@ -821,10 +821,10 @@ struct fmt::formatter<cql3::expr::expression> {
     }
 
     template <typename FormatContext>
-    auto format(const cql3::expr::expression& expr, FormatContext& ctx) {
+    auto format(const cql3::expr::expression& expr, FormatContext& ctx) const {
         std::ostringstream os;
         os << expr;
-        return format_to(ctx.out(), "{}", os.str());
+        return fmt::format_to(ctx.out(), "{}", os.str());
     }
 };
 
@@ -836,10 +836,10 @@ struct fmt::formatter<cql3::expr::expression::printer> {
     }
 
     template <typename FormatContext>
-    auto format(const cql3::expr::expression::printer& pr, FormatContext& ctx) {
+    auto format(const cql3::expr::expression::printer& pr, FormatContext& ctx) const {
         std::ostringstream os;
         os << pr;
-        return format_to(ctx.out(), "{}", os.str());
+        return fmt::format_to(ctx.out(), "{}", os.str());
     }
 };
 
@@ -854,6 +854,6 @@ struct fmt::formatter<cql3::expr::column_value> {
     auto format(const cql3::expr::column_value& col, FormatContext& ctx) {
         std::ostringstream os;
         os << col;
-        return format_to(ctx.out(), "{}", os.str());
+        return fmt::format_to(ctx.out(), "{}", os.str());
     }
 };

locator/abstract_replication_strategy.hh

@@ -308,7 +308,7 @@ struct fmt::formatter<locator::effective_replication_map::factory_key> {
     auto format(const locator::effective_replication_map::factory_key& key, FormatContext& ctx) {
         std::ostringstream os;
         os << key;
-        return format_to(ctx.out(), "{}", os.str());
+        return fmt::format_to(ctx.out(), "{}", os.str());
     }
 };