Function New

log.go:246–255

New creates a root logger with given output writer. If the output writer implements the LevelWriter interface, the WriteLevel method will be called instead of the Write one. Each logging operation makes a single call to the Writer's Write method. There is no guarantee on access serialization to the

(w io.Writer)

// guarantee on access serialization to the Writer. If your Writer is not thread safe,
// you may consider using sync wrapper.
func New(w io.Writer) Logger {
	if w == nil {
		w = io.Discard
	}
	lw, ok := w.(LevelWriter)
	if !ok {
		lw = LevelWriterAdapter{w}
	}
	return Logger{w: lw, level: TraceLevel}
}

// Nop returns a disabled logger for which all operation are no-op.
func Nop() Logger {