In Lua, how can you print the name of the current function, like the C99 __func__ identifier?

Question

Something like this:

function foo()
    print( __func__ )
   ...
end

How can it be done?

Answer 1

You can try:

local dbFunc = debug.getinfo(1) and debug.getinfo(1).name or ""

Info
Info["currentline"] = 1376
Info["source"] = "@.\mymod.lua"
Info["short_src"] = ".\mymod.lua"
Info["nups"] = 13
Info["isvararg"] = false
Info["what"] = "Lua"
Info["lastlinedefined"] = 1570
Info["func"] = function: 000000000030B440
Info["istailcall"] = false
Info["linedefined"] = 1375
Info["namewhat"] = "field"
Info["name"] = "ExportDB" <<--- See here the function name
Info["nparams"] = 4

debug.getinfo(1) Returns this structure of the current execution state of the active function in the stack.

If n is larger than the number of active functions in the stack, debug.getinfo() returns nil.

That's why you have to check if it exists before taking *.name and return an empty string if the information is not available

A it is called inside the ExportDB() function, it return its name