[BUG] Compile failed for packed attribute struct

[MashoujiangPlusAI]

Hi everyone,

I don't want to be a nuisance :), but I meet another compiling issue for below code, which is a struct with packed attribute. And without the attribute, we could compile the code successfully. See below code or here demo

include <binlog/binlog.hpp>

typedef struct { uint32_t msgid; }__attribute_\((packed)) Message;

int main() { Message* message = new Message; BINLOG_INFO("Hello {}!", message->msg_id); return 0; }

[erenon]

This happens because GCC doesn't allow to form a reference to a packed field. Workaround for a single field:

  BINLOG_INFO("Hello {}!", std::uint32_t{message->msg_id});

To make the whole struct loggable with BINLOG_ADAPT_STRUCT, introduce getters, that simply return the field by value: http://binlog.org/UserGuide.html#logging-user-defined-structures

[MashoujiangPlusAI]

Got it, thank you very much!