Logger.info() cannot be used with primitive types

Hello,

import com.typesafe.scalalogging.StrictLogging

new StrictLogging { 
  logger.info("2 + 2 == {}", new Integer(4)) // compiles
  logger.info("2 + 2 == {}", 4)              // fails to compile
}

The error is:

overloaded method value info with alternatives:
  (marker: org.slf4j.Marker,message: String,args: AnyRef*)Unit <and>
  (marker: org.slf4j.Marker,message: String)Unit <and>
  (message: String,args: AnyRef*)Unit <and>
  (message: String,cause: Throwable)Unit
cannot be applied to (String, Int)

Is there any reason for using AnyRef* instead of Any* in:

class Logger {
  def info(message: String, args: AnyRef*): Unit = macro LoggerMacro.infoMessageArgs
}

If not, I can fix it and create a PR.

[ptxmac]

Actually the string interpolation isn’t evaluated unless the logger is enabled! The logger macros converts logger.debug into a if statement that checks if debug is enabled before calling the logger.

[stefanvanwouw]

I encountered the same problem and circumvented it by using Scala’s String Interpolation feature http://docs.scala-lang.org/overviews/core/string-interpolation.html . When using sfl4j LoggerFactory’s logger directly similar problems occur as the one you describe above.