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scylladb/gms
Kefu Chai cb781c0ff7 gms: add add formatter for gms::versioned_value
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, we define formatters for `gms::versioned_value`. its
operator<< is preserved, as it's still being used by the homebrew
generic formatter for std::unordered_map<gms::application_state,
gms::versioned_value>, which is in turn used in gms/gossiper.cc.

Refs #13245

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

Closes scylladb/scylladb#17366
2024-02-18 19:21:54 +02:00
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