Creating a custom log message categorie

General Usage
9

Well, you do not have the line:

import Base: show

Perhaps that makes the difference. But I have another issue:

The trace macro doesn’t work yet:

using Logging

import Base: show

const Trace          = LogLevel(500)

macro _sourceinfo()
    esc(quote
        (__module__,
         __source__.file === nothing ? "?" : String(__source__.file),
         __source__.line)
    end)
end

macro  trace(exs...) logmsg_code((@_sourceinfo)..., :Trace,  exs...) end

function show(io::IO, level::LogLevel)
    if level == Logging.Debug          print(io, "Debug")
    elseif level == Logging.Info           print(io, "Info")
    elseif level == Trace                  print(io, "Trace")    
    elseif level == Logging.Warn           print(io, "Warn")
    elseif level == Logging.Error          print(io, "Error")
    else                           print(io, "LogLevel($(level.level))")
    end
end

logger = ConsoleLogger(stdout, Logging.Info) # Warn or Info or Debug
global_logger(logger)

@logmsg Trace "A trace message ..."
@trace "Even better..."

Error message:

[ Trace: A trace message ...
ERROR: LoadError: LoadError: UndefVarError: logmsg_code not defined

Ok, I could copy and past the whole CoreLogging module, but why am I not able to import any function from this module?