mirrors/scylladb
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

gms/inet_address: specialize fmt::formatter<gms::inet_address>

Browse Source 
this is a part of a series to migrating from `operator<<(ostream&, ..)`
based formatting to fmtlib based formatting. the goal here is to enable
fmtlib to print `gms::inet_address` with the help of fmt::ostream.
please note, the ':' delimiter is specified when printing the IPv6 address.

Refs #13245

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
This commit is contained in:
Kefu Chai
2023-03-22 16:02:24 +08:00
parent a606606ac4
commit 4ea6e06cac
1 changed files with 16 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
gms/inet_address.hh
View File

@@ -89,3 +89,19 @@ struct hash<gms::inet_address> {
size_t operator()(gms::inet_address a) const noexcept { return std::hash<net::inet_address>()(a._addr); }
};
}
template <>
struct fmt::formatter<gms::inet_address> : fmt::formatter<std::string_view> {
template <typename FormatContext>
auto format(const ::gms::inet_address& x, FormatContext& ctx) const {
if (x.addr().is_ipv4()) {
return fmt::format_to(ctx.out(), "{}", x.addr());
}
// print 2 bytes in a group, and use ':' as the delimeter
format_to(ctx.out(), "{:2:}", fmt_hex(x.bytes()));
if (x.addr().scope() != seastar::net::inet_address::invalid_scope) {
return format_to(ctx.out(), "%{}", x.addr().scope());
}
return ctx.out();
}
};