Erlang - 如何在运行时找到当前函数的名称？

Question

Can I find the name of the current function I'm in at runtime?

foo() ->
  foo = find_function_name().

Is it possible to write the fun find_function_name/0? How would you do it? Does it already exist?

Answer 1

More lightweight and also not depending on the stacktrace format which can change occasionally, I'd rather use process_info/2 :

{_, {Module, Function, Arity}} = process_info(self(), current_function)

In Function you'll find the function name as an atom and you get the Module and the Arity also. You can't write this as function because it would just return this function as current. A macro that gives you the current function name as atom could look like:

-define(current_function_name(), 
            element(2, element(2, process_info(self(), current_function)))).

foo() ->
    foo = ?current_function_name().