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Code Issues Releases Wiki Activity

ircd: Replace callsites w/ template deduced mutable_cast.

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This commit is contained in:
Jason Volk 2020-11-03 11:30:15 -08:00
parent 2eab4fb4f7
commit f3886d60d8
12 changed files with 60 additions and 60 deletions
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2
include/ircd/asio.h
View file

@ -87,7 +87,7 @@ inline boost::asio::io_context &
ircd::ios::get() ircd::ios::get()
noexcept noexcept
{ {
auto &context(const_cast<asio::execution_context &>(main.context())); auto &context(mutable_cast(main.context()));
return static_cast<asio::io_context &>(context); return static_cast<asio::io_context &>(context);
} }
#endif #endif

2
include/ircd/util/pubsetbuf.h
View file

@ -34,7 +34,7 @@ pubsetbuf(stringstream &ss,
{ {
auto *const &data auto *const &data
{ {
const_cast<char *>(s.data()) mutable_cast(s.data())
}; };
ss.rdbuf()->pubsetbuf(data, s.size()); ss.rdbuf()->pubsetbuf(data, s.size());

2
ircd/ctx.cc
View file

@ -1981,7 +1981,7 @@ ircd::ctx::promise_base::promise_base(const promise_base &o)
:st{o.st} :st{o.st}
,next{nullptr} ,next{nullptr}
{ {
append(*this, const_cast<promise_base &>(o)); append(*this, mutable_cast(o));
} }
ircd::ctx::promise_base & ircd::ctx::promise_base &

40
ircd/db.cc
View file

@ -1948,7 +1948,7 @@ const
return std::all_of(std::begin(*this), std::end(*this), [] return std::all_of(std::begin(*this), std::end(*this), []
(const auto &cell) (const auto &cell)
{ {
db::column &column(const_cast<db::cell &>(cell)); db::column &column(mutable_cast(cell));
return cell.valid() && db::cached(column, cell.key()); return cell.valid() && db::cached(column, cell.key());
}); });
} }
@ -1960,7 +1960,7 @@ const
return std::all_of(std::begin(*this), std::end(*this), [&key] return std::all_of(std::begin(*this), std::end(*this), [&key]
(const auto &cell) (const auto &cell)
{ {
db::column &column(const_cast<db::cell &>(cell)); db::column &column(mutable_cast(cell));
return db::cached(column, key); return db::cached(column, key);
}); });
} }
@ -3149,8 +3149,8 @@ ircd::db::property(const column &column,
const string_view &name) const string_view &name)
{ {
std::string ret; std::string ret;
database::column &c(const_cast<db::column &>(column)); database::column &c(mutable_cast(column));
database &d(const_cast<db::column &>(column)); database &d(mutable_cast(column));
if(!d.d->GetProperty(c, slice(name), &ret)) if(!d.d->GetProperty(c, slice(name), &ret))
throw not_found throw not_found
{ {
@ -3169,8 +3169,8 @@ ircd::db::property(const column &column,
const string_view &name) const string_view &name)
{ {
uint64_t ret(0); uint64_t ret(0);
database::column &c(const_cast<db::column &>(column)); database::column &c(mutable_cast(column));
database &d(const_cast<db::column &>(column)); database &d(mutable_cast(column));
if(!d.d->GetIntProperty(c, slice(name), &ret)) if(!d.d->GetIntProperty(c, slice(name), &ret))
throw not_found throw not_found
{ {
@ -3189,8 +3189,8 @@ ircd::db::property(const column &column,
const string_view &name) const string_view &name)
{ {
std::map<std::string, std::string> ret; std::map<std::string, std::string> ret;
database::column &c(const_cast<db::column &>(column)); database::column &c(mutable_cast(column));
database &d(const_cast<db::column &>(column)); database &d(mutable_cast(column));
if(!d.d->GetMapProperty(c, slice(name), &ret)) if(!d.d->GetMapProperty(c, slice(name), &ret))
ret.emplace(std::string{name}, property<std::string>(column, name)); ret.emplace(std::string{name}, property<std::string>(column, name));
@ -3200,8 +3200,8 @@ ircd::db::property(const column &column,
ircd::db::options ircd::db::options
ircd::db::getopt(const column &column) ircd::db::getopt(const column &column)
{ {
database &d(const_cast<db::column &>(column)); database &d(mutable_cast(column));
database::column &c(const_cast<db::column &>(column)); database::column &c(mutable_cast(column));
return options return options
{ {
static_cast<rocksdb::ColumnFamilyOptions>(d.d->GetOptions(c)) static_cast<rocksdb::ColumnFamilyOptions>(d.d->GetOptions(c))
@ -3212,8 +3212,8 @@ size_t
ircd::db::bytes(const column &column) ircd::db::bytes(const column &column)
{ {
rocksdb::ColumnFamilyMetaData cfm; rocksdb::ColumnFamilyMetaData cfm;
database &d(const_cast<db::column &>(column)); database &d(mutable_cast(column));
database::column &c(const_cast<db::column &>(column)); database::column &c(mutable_cast(column));
assert(bool(c.handle)); assert(bool(c.handle));
d.d->GetColumnFamilyMetaData(c.handle.get(), &cfm); d.d->GetColumnFamilyMetaData(c.handle.get(), &cfm);
return cfm.size; return cfm.size;
@ -3223,8 +3223,8 @@ size_t
ircd::db::file_count(const column &column) ircd::db::file_count(const column &column)
{ {
rocksdb::ColumnFamilyMetaData cfm; rocksdb::ColumnFamilyMetaData cfm;
database &d(const_cast<db::column &>(column)); database &d(mutable_cast(column));
database::column &c(const_cast<db::column &>(column)); database::column &c(mutable_cast(column));
assert(bool(c.handle)); assert(bool(c.handle));
d.d->GetColumnFamilyMetaData(c.handle.get(), &cfm); d.d->GetColumnFamilyMetaData(c.handle.get(), &cfm);
return cfm.file_count; return cfm.file_count;
@ -3233,7 +3233,7 @@ ircd::db::file_count(const column &column)
std::vector<std::string> std::vector<std::string>
ircd::db::files(const column &column) ircd::db::files(const column &column)
{ {
database::column &c(const_cast<db::column &>(column)); database::column &c(mutable_cast(column));
database &d(*c.d); database &d(*c.d);
rocksdb::ColumnFamilyMetaData cfmd; rocksdb::ColumnFamilyMetaData cfmd;
@ -3927,7 +3927,7 @@ ircd::db::insert(rocksdb::Cache &cache,
throw_on_error throw_on_error
{ {
cache.Insert(slice(key), cache.Insert(slice(key),
const_cast<char *>(data(value.release())), mutable_cast(data(value.release())),
value_size, value_size,
deleter, deleter,
nullptr) nullptr)
@ -3947,7 +3947,7 @@ ircd::db::for_each(const rocksdb::Cache &cache,
const std::lock_guard lock{mutex}; const std::lock_guard lock{mutex};
thread_local rocksdb::Cache *_cache; thread_local rocksdb::Cache *_cache;
_cache = const_cast<rocksdb::Cache *>(&cache); _cache = mutable_cast(&cache);
thread_local const cache_closure *_closure; thread_local const cache_closure *_closure;
_closure = &closure; _closure = &closure;
@ -3975,7 +3975,7 @@ ircd::db::charge(const rocksdb::Cache &cache_,
{ {
auto &cache auto &cache
{ {
const_cast<rocksdb::Cache &>(cache_) mutable_cast(cache_)
}; };
const custom_ptr<rocksdb::Cache::Handle> handle const custom_ptr<rocksdb::Cache::Handle> handle
@ -4004,7 +4004,7 @@ ircd::db::exists(const rocksdb::Cache &cache_,
{ {
auto &cache auto &cache
{ {
const_cast<rocksdb::Cache &>(cache_) mutable_cast(cache_)
}; };
const custom_ptr<rocksdb::Cache::Handle> handle const custom_ptr<rocksdb::Cache::Handle> handle
@ -4747,7 +4747,7 @@ ircd::db::_seek(const vector_view<_read_op> &op,
std::transform(begin(op), end(op), cf, [] std::transform(begin(op), end(op), cf, []
(auto &op_) (auto &op_)
{ {
auto &op(const_cast<_read_op &>(op_)); auto &op(mutable_cast(op_));
database::column &c(std::get<column>(op)); database::column &c(std::get<column>(op));
return static_cast<rocksdb::ColumnFamilyHandle *>(c); return static_cast<rocksdb::ColumnFamilyHandle *>(c);
}); });

16
ircd/db_database.cc
View file

@ -556,7 +556,7 @@ ircd::db::wals(const database &cd)
{ {
auto &d auto &d
{ {
const_cast<database &>(cd) mutable_cast(cd)
}; };
std::vector<std::unique_ptr<rocksdb::LogFile>> vec; std::vector<std::unique_ptr<rocksdb::LogFile>> vec;
@ -595,7 +595,7 @@ ircd::db::files(const database &cd,
uint64_t &msz) uint64_t &msz)
{ {
std::vector<std::string> ret; std::vector<std::string> ret;
auto &d(const_cast<database &>(cd)); auto &d(mutable_cast(cd));
throw_on_error throw_on_error
{ {
d.d->GetLiveFiles(ret, &msz, false) d.d->GetLiveFiles(ret, &msz, false)
@ -613,7 +613,7 @@ ircd::db::errors(const database &d)
uint64_t uint64_t
ircd::db::sequence(const database &cd) ircd::db::sequence(const database &cd)
{ {
database &d(const_cast<database &>(cd)); database &d(mutable_cast(cd));
return d.d->GetLatestSequenceNumber(); return d.d->GetLatestSequenceNumber();
} }
@ -635,7 +635,7 @@ ircd::db::property(const database &cd,
const string_view &name) const string_view &name)
{ {
uint64_t ret(0); uint64_t ret(0);
database &d(const_cast<database &>(cd)); database &d(mutable_cast(cd));
if(!d.d->GetAggregatedIntProperty(slice(name), &ret)) if(!d.d->GetAggregatedIntProperty(slice(name), &ret))
throw not_found throw not_found
{ {
@ -3632,7 +3632,7 @@ ircd::db::database::sst::info::vector::vector(const database &d)
ircd::db::database::sst::info::vector::vector(const db::column &column) ircd::db::database::sst::info::vector::vector(const db::column &column)
{ {
database::column &c(const_cast<db::column &>(column)); database::column &c(mutable_cast(column));
database &d(*c.d); database &d(*c.d);
rocksdb::ColumnFamilyMetaData cfmd; rocksdb::ColumnFamilyMetaData cfmd;
@ -3677,7 +3677,7 @@ ircd::db::database::sst::info::vector::vector(const db::column &column)
ircd::db::database::sst::info::info(const database &d_, ircd::db::database::sst::info::info(const database &d_,
const string_view &filename) const string_view &filename)
{ {
auto &d(const_cast<database &>(d_)); auto &d(mutable_cast(d_));
const ctx::uninterruptible::nothrow ui; const ctx::uninterruptible::nothrow ui;
std::vector<rocksdb::LiveFileMetaData> v; std::vector<rocksdb::LiveFileMetaData> v;
@ -3807,7 +3807,7 @@ ircd::db::database::sst::info::operator=(rocksdb::TableProperties &&tp)
ircd::db::database::wal::info::vector::vector(const database &d_) ircd::db::database::wal::info::vector::vector(const database &d_)
{ {
auto &d{const_cast<database &>(d_)}; auto &d{mutable_cast(d_)};
std::vector<std::unique_ptr<rocksdb::LogFile>> vec; std::vector<std::unique_ptr<rocksdb::LogFile>> vec;
throw_on_error throw_on_error
{ {
@ -3826,7 +3826,7 @@ ircd::db::database::wal::info::vector::vector(const database &d_)
ircd::db::database::wal::info::info(const database &d_, ircd::db::database::wal::info::info(const database &d_,
const string_view &filename) const string_view &filename)
{ {
auto &d{const_cast<database &>(d_)}; auto &d{mutable_cast(d_)};
std::vector<std::unique_ptr<rocksdb::LogFile>> vec; std::vector<std::unique_ptr<rocksdb::LogFile>> vec;
throw_on_error throw_on_error
{ {

2
ircd/net_listener.cc
View file

@ -134,7 +134,7 @@ ircd::net::config(const acceptor &a)
std::string std::string
ircd::net::cipher_list(const acceptor &a) ircd::net::cipher_list(const acceptor &a)
{ {
auto &ssl(const_cast<acceptor &>(a).ssl); auto &ssl(mutable_cast(a).ssl);
return openssl::cipher_list(*ssl.native_handle()); return openssl::cipher_list(*ssl.native_handle());
} }

44
ircd/openssl.cc
View file

@ -118,7 +118,7 @@ void
ircd::openssl::set_curves(SSL &ssl, ircd::openssl::set_curves(SSL &ssl,
std::string list) std::string list)
{ {
auto data(const_cast<char *>(list.data())); auto data(mutable_cast(list.data()));
call(::SSL_ctrl, &ssl, SSL_CTRL_SET_CURVES_LIST, 0, data); call(::SSL_ctrl, &ssl, SSL_CTRL_SET_CURVES_LIST, 0, data);
} }
@ -126,7 +126,7 @@ void
ircd::openssl::set_curves(SSL_CTX &ssl, ircd::openssl::set_curves(SSL_CTX &ssl,
std::string list) std::string list)
{ {
auto data(const_cast<char *>(list.data())); auto data(mutable_cast(list.data()));
call(::SSL_CTX_ctrl, &ssl, SSL_CTRL_SET_CURVES_LIST, 0, data); call(::SSL_CTX_ctrl, &ssl, SSL_CTRL_SET_CURVES_LIST, 0, data);
} }
@ -178,7 +178,7 @@ ircd::openssl::cipher_list(const SSL_CTX &ctx,
{ {
const custom_ptr<SSL> ssl const custom_ptr<SSL> ssl
{ {
SSL_new(const_cast<SSL_CTX *>(&ctx)), SSL_free SSL_new(mutable_cast(&ctx)), SSL_free
}; };
std::stringstream ret; std::stringstream ret;
@ -254,7 +254,7 @@ ircd::openssl::current_cert(X509_STORE_CTX &cx)
const X509 & const X509 &
ircd::openssl::current_cert(const X509_STORE_CTX &cx) ircd::openssl::current_cert(const X509_STORE_CTX &cx)
{ {
auto &mcx{const_cast<X509_STORE_CTX &>(cx)}; auto &mcx{mutable_cast(cx)};
const auto *const ret const auto *const ret
{ {
X509_STORE_CTX_get_current_cert(&mcx) X509_STORE_CTX_get_current_cert(&mcx)
@ -272,7 +272,7 @@ ircd::openssl::current_cert(const X509_STORE_CTX &cx)
uint uint
ircd::openssl::get_error_depth(const X509_STORE_CTX &cx) ircd::openssl::get_error_depth(const X509_STORE_CTX &cx)
{ {
auto &mcx{const_cast<X509_STORE_CTX &>(cx)}; auto &mcx{mutable_cast(cx)};
const int ret const int ret
{ {
X509_STORE_CTX_get_error_depth(&mcx) X509_STORE_CTX_get_error_depth(&mcx)
@ -297,7 +297,7 @@ ircd::openssl::cert_error_string(const long &n)
int int
ircd::openssl::get_error(const X509_STORE_CTX &cx) ircd::openssl::get_error(const X509_STORE_CTX &cx)
{ {
auto &mcx{const_cast<X509_STORE_CTX &>(cx)}; auto &mcx{mutable_cast(cx)};
return X509_STORE_CTX_get_error(&mcx); return X509_STORE_CTX_get_error(&mcx);
} }
@ -462,7 +462,7 @@ ircd::openssl::genX509(const mutable_buffer &out,
std::string std::string
ircd::openssl::stringify(const X509 &cert_) ircd::openssl::stringify(const X509 &cert_)
{ {
auto &cert{const_cast<X509 &>(cert_)}; auto &cert{mutable_cast(cert_)};
// issuer // issuer
std::vector<json::member> issuer_json; std::vector<json::member> issuer_json;
@ -608,7 +608,7 @@ bool
ircd::openssl::for_each(const X509_NAME &name_, ircd::openssl::for_each(const X509_NAME &name_,
const x509_name_entry_closure &closure) const x509_name_entry_closure &closure)
{ {
const auto name(const_cast<X509_NAME *>(&name_)); const auto name(mutable_cast(&name_));
const auto cnt(X509_NAME_entry_count(name)); const auto cnt(X509_NAME_entry_count(name));
for(auto i(0); i < cnt; ++i) for(auto i(0); i < cnt; ++i)
{ {
@ -637,7 +637,7 @@ ircd::openssl::for_each(const X509_NAME &name_,
time_t time_t
ircd::openssl::not_before(const X509 &cert_) ircd::openssl::not_before(const X509 &cert_)
{ {
auto &cert{const_cast<X509 &>(cert_)}; auto &cert{mutable_cast(cert_)};
ASN1_TIME *const notBefore{X509_get_notBefore(&cert)}; ASN1_TIME *const notBefore{X509_get_notBefore(&cert)};
return get_time(*notBefore); return get_time(*notBefore);
} }
@ -645,7 +645,7 @@ ircd::openssl::not_before(const X509 &cert_)
time_t time_t
ircd::openssl::not_after(const X509 &cert_) ircd::openssl::not_after(const X509 &cert_)
{ {
auto &cert{const_cast<X509 &>(cert_)}; auto &cert{mutable_cast(cert_)};
ASN1_TIME *const notAfter{X509_get_notAfter(&cert)}; ASN1_TIME *const notAfter{X509_get_notAfter(&cert)};
return get_time(*notAfter); return get_time(*notAfter);
} }
@ -656,7 +656,7 @@ ircd::openssl::subject_common_name(const mutable_buffer &out,
{ {
X509_NAME *const subject X509_NAME *const subject
{ {
X509_get_subject_name(const_cast<X509 *>(&cert)) X509_get_subject_name(mutable_cast(&cert))
}; };
if(!subject) if(!subject)
@ -701,13 +701,13 @@ ircd::openssl::print_subject(const mutable_buffer &buf,
const X509_NAME *const subject const X509_NAME *const subject
{ {
X509_get_subject_name(const_cast<X509 *>(&cert)) X509_get_subject_name(mutable_cast(&cert))
}; };
return bio::write(buf, [&subject, &flags] return bio::write(buf, [&subject, &flags]
(BIO *const &bio) (BIO *const &bio)
{ {
X509_NAME_print_ex(bio, const_cast<X509_NAME *>(subject), 0, flags); X509_NAME_print_ex(bio, mutable_cast(subject), 0, flags);
}); });
} }
@ -737,7 +737,7 @@ ircd::openssl::print(const mutable_buffer &buf,
return bio::write(buf, [&cert, &flags] return bio::write(buf, [&cert, &flags]
(BIO *const &bio) (BIO *const &bio)
{ {
X509_print_ex(bio, const_cast<X509 *>(&cert), 0, flags); X509_print_ex(bio, mutable_cast(&cert), 0, flags);
}); });
} }
@ -780,7 +780,7 @@ ircd::openssl::write_pem(const mutable_buffer &out,
return bio::write(out, [&cert] return bio::write(out, [&cert]
(BIO *const &bio) (BIO *const &bio)
{ {
call(::PEM_write_bio_X509, bio, const_cast<X509 *>(&cert)); call(::PEM_write_bio_X509, bio, mutable_cast(&cert));
}); });
} }
@ -790,7 +790,7 @@ ircd::openssl::i2d(const mutable_buffer &buf,
{ {
auto &cert auto &cert
{ {
const_cast<X509 &>(_cert) mutable_cast(_cert)
}; };
const int len const int len
@ -948,7 +948,7 @@ void
ircd::openssl::ec_fini() ircd::openssl::ec_fini()
noexcept noexcept
{ {
EC_GROUP_free(const_cast<EC_GROUP *>(secp256k1)); EC_GROUP_free(mutable_cast(secp256k1));
} }
void void
@ -1093,7 +1093,7 @@ ircd::openssl::print(const mutable_buffer &buf,
return bio::write(buf, [&rsa, &offset] return bio::write(buf, [&rsa, &offset]
(BIO *const &bio) (BIO *const &bio)
{ {
RSA_print(bio, const_cast<RSA *>(&rsa), offset); RSA_print(bio, mutable_cast(&rsa), offset);
}); });
} }
@ -1110,7 +1110,7 @@ ircd::openssl::size(const RSA &key)
void void
ircd::openssl::check(const RSA &key) ircd::openssl::check(const RSA &key)
{ {
if(call<error, -1>(::RSA_check_key, const_cast<RSA *>(&key)) == 0) if(call<error, -1>(::RSA_check_key, mutable_cast(&key)) == 0)
throw error{"Invalid RSA"}; throw error{"Invalid RSA"};
} }
@ -1118,7 +1118,7 @@ bool
ircd::openssl::check(const RSA &key, ircd::openssl::check(const RSA &key,
const std::nothrow_t) const std::nothrow_t)
{ {
return RSA_check_key(const_cast<RSA *>(&key)) == 1; return RSA_check_key(mutable_cast(&key)) == 1;
} }
// //
@ -1151,7 +1151,7 @@ ircd::openssl::write_pem_priv(const mutable_buffer &out,
pem_password_cb *const pwcb{nullptr}; pem_password_cb *const pwcb{nullptr};
void *const u{nullptr}; void *const u{nullptr};
auto *const p{const_cast<EVP_PKEY *>(&evp)}; auto *const p{mutable_cast(&evp)};
return bio::write(out, [&evp, &p, &enc, &kstr, &klen, &pwcb, &u] return bio::write(out, [&evp, &p, &enc, &kstr, &klen, &pwcb, &u]
(BIO *const &bio) (BIO *const &bio)
{ {
@ -1176,7 +1176,7 @@ ircd::string_view
ircd::openssl::write_pem_pub(const mutable_buffer &out, ircd::openssl::write_pem_pub(const mutable_buffer &out,
const EVP_PKEY &evp) const EVP_PKEY &evp)
{ {
auto *const p{const_cast<EVP_PKEY *>(&evp)}; auto *const p{mutable_cast(&evp)};
return bio::write(out, [&evp, &p] return bio::write(out, [&evp, &p]
(BIO *const &bio) (BIO *const &bio)
{ {

2
ircd/server.cc
View file

@ -3808,7 +3808,7 @@ ircd::server::tag::read_chunk_dynamic_head(const const_buffer &buffer,
// Setup the capstan and mark the end of the tape // Setup the capstan and mark the end of the tape
parse::buffer pb parse::buffer pb
{ {
mutable_buffer(const_cast<char *>(data(chunk_head)), size(chunk_head)) mutable_buffer(mutable_cast(data(chunk_head)), size(chunk_head))
}; };
parse::capstan pc{pb}; parse::capstan pc{pb};
pc.read += size(chunk_head); pc.read += size(chunk_head);

2
ircd/util.cc
View file

@ -283,7 +283,7 @@ ircd::util::string(const size_t &size,
std::string ret(alloc_size, char{}); std::string ret(alloc_size, char{});
const mutable_buffer buf const mutable_buffer buf
{ {
const_cast<char *>(ret.data()), ret.size() mutable_cast(ret.data()), ret.size()
}; };
const size_t consumed const size_t consumed

2
matrix/homeserver_bootstrap.cc
View file

@ -125,7 +125,7 @@ try
m::keys::cache::set(key->verify_keys); m::keys::cache::set(key->verify_keys);
create(me); create(me);
const_cast<m::user &>(me).activate(); mutable_cast(me).activate();
create(my_room, me); create(my_room, me);
create(conf_room, me); create(conf_room, me);

2
matrix/typing.cc
View file

@ -421,7 +421,7 @@ try
} }
else if(typing && was_typing) else if(typing && was_typing)
{ {
auto &t(const_cast<typist &>(*it)); auto &t(mutable_cast(*it));
t.timesout = calc_timesout(timeout); t.timesout = calc_timesout(timeout);
} }
else if(!typing && was_typing) else if(!typing && was_typing)

4
matrix/vm_execute.cc
View file

@ -277,7 +277,7 @@ try
// We have to set the event_id in the event instance if it didn't come // We have to set the event_id in the event instance if it didn't come
// with the event JSON. // with the event JSON.
if(!opts.edu && !event.event_id) if(!opts.edu && !event.event_id)
const_cast<m::event &>(event).event_id = eval.room_version == "3"? mutable_cast(event).event_id = eval.room_version == "3"?
event::id{event::id::v3{eval.event_id, event}}: event::id{event::id::v3{eval.event_id, event}}:
event::id{event::id::v4{eval.event_id, event}}; event::id{event::id::v4{eval.event_id, event}};
@ -285,7 +285,7 @@ try
// it so other contexts don't see an invalid reference. // it so other contexts don't see an invalid reference.
const unwind restore_event_id{[&event] const unwind restore_event_id{[&event]
{ {
const_cast<m::event &>(event).event_id = json::get<"event_id"_>(event)? mutable_cast(event).event_id = json::get<"event_id"_>(event)?
event.event_id: event.event_id:
m::event::id{}; m::event::id{};
}}; }};