[jochenseeber]

Annotate a method, and logbuch logs each call to it, with the arguments on entry, the result and the duration on exit, or any exception.

Example:

class Calculator
  @[Logged("dividing two numbers")]
  def divide(a : Int32, b : Int32) : Int32
    a // b
  end
end

Calculator.new.divide(10, 2)

logs (if logging is configured):

 TRACE calculator: dividing two numbers -- method: "Calculator#divide", args: {"a" => 10, "b" => 2}
 TRACE calculator: done dividing two numbers -- method: "Calculator#divide", result: 5, duration_ns: 83