logger

type Encode func(*Field) string

type Field struct {
	Key    string
	Type   FieldType
	Value  interface{}
	Encode Encode
}

type FieldType uint8

type Level int8

type Logger interface {
	// Init initialises options
	Init(options ...Option) error
	// Level returns the logging level
	Level() Level
	// Log inserts a log entry.  Arguments may be handled in the manner
	// of fmt.Print, but the underlying logger may also decide to handle
	// them differently.
	Log(level Level, v ...interface{})
	// Logf insets a log entry.  Arguments are handled in the manner of
	// fmt.Printf.
	Logf(level Level, format string, v ...interface{})
	// Fields set fields to always be logged
	Fields(fields ...Field) Logger
	// SetLevel updates the logging level.
	SetLevel(Level)
	// String returns the name of logger
	String() string
}

type Option func(*Options)

type Options struct {
	Context context.Context
}