erlang Mod:module_info

Mod：module_info()  可以得到模块的元数据！

(rabbit@nimbus)4> test:module_info().[{exports,[{module_info,0},{module_info,1}]},{imports,[]},{attributes,[{vsn,[64335248162526234078446821625873662118]},              {tag,[generated_by_tool]},

      {behaviour,[my_behaviour]}]}, 可以得到行为信息{compile,[{options,[{d,use_specs},                     {outdir,"/data/rabbitmq-server-3.0.0/ebin"},                     {i,"/data/rabbitmq-server-3.0.0/include"},                     debug_info]},           {version,"4.8"},           {time,{2012,12,12,14,39,42}},           {source,"/data/rabbitmq-server-3.0.0/src/test.erl"}]}](rabbit@nimbus)5>