# Functions
AddFlags adds a standard log level flags to the flag.CommandLine flag set.
At returns whether the logger is currently logging at the provided level.
Errorf formats a message in the manner of fmt.Sprintf and outputs it at the Error level to the current outputter.
Fatal formats a message in the manner of fmt.Sprint, outputs it at the error level to the current outputter and then calls os.Exit(1).
Fatalf formats a message in the manner of fmt.Sprintf, outputs it at the error level to the current outputter and then calls os.Exit(1).
GetOutputter returns the current outputter used by the log package.
Output outputs a log message to the current outputter at the provided level and call depth.
Outputf is formats a message using fmt.Sprintf and outputs it to the provided logger at the provided level.
Panic formats a message in the manner of fmt.Sprint, outputs it at the error level to the current outputter and then panics.
Panicf formats a message in the manner of fmt.Sprintf, outputs it at the error level to the current outputter and then panics.
Print formats a message in the manner of fmt.Sprint and outputs it at the Info level to the current outputter.
Printf formats a message in the manner of fmt.Sprintf and outputs it at the Info level to the current outputter.
SetFlags sets the output flags for the Go standard logger.
SetLevel sets the log level for the Go standard logger.
SetOutput sets the output destination for the Go standard logger.
SetOutputter provides a new outputter for use in the log package.
SetPrefix sets the output prefix for the Go standard logger.
# Constants
Debug outputs messages intended for debugging and development, not for regular users.
Error outputs error messages.
Info outputs informational messages.
the date in the local time zone: 2009/01/23.
full file name and line number: /a/b/c/d.go:23.
microsecond resolution: 01:23:23.123123.
final file name element and line number: d.go:23.
initial values for the standard logger.
the time in the local time zone: 01:23:23.
if Ldate or Ltime is set, use UTC rather than the local time zone.
Off never outputs messages.
# Interfaces
An Outputter provides a destination for leveled log output.