Does ruby expression expansion via #{} do double expansion? -

okay, per suggestions on clarifying intent have restated question. hope example clear.

$funcname = "" $message = "" $debugformat = "within #{$funcname} message: #{$message}"   def    $funcname = "something"    # .    # .    # .    $message = "an important message."    puts "#{$debugformat}"  end  def    $funcname = "another"    # method related code ...    $message = "result message output"    puts "#{$debugformat}" end 

so, idea have various debug related strings use in various places without needing repeat same formatting , such.

anyway, isn't super critical it's more attempt try , learn ruby better.

go easy,

-daniel

no, not possible have shown. #{} syntax string interpolation, when write pp = "[#{fname}]", it's storing string [empty] in variable pp. strings have no memory of code used produce them.

it's unclear you're attempting achieve this, more method more appropriate string interpolation.

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update since edit: seems want create sort of simulated stack trace. string interpolation still doesn't make sense. instead, this:

def debug(message)   puts "#{ caller[0][/`([^']*)'/, 1]}: #{message}" end  def   debug "an important message" end  def   debug "result message output" end  

based on strange usage of global variables , constants, seems you're trying apply ideas other language in ways don't fit ruby. i'd recommend looking through ruby book familiar basics.