lexer

Documentation

Index

• func Run(inputName string, input io.Reader, initState StateFunc, tokenFunc TokenFunc) error
• type Context
• type LocationInFile
  • func (lif *LocationInFile) AdvanceLine()
  • func (lif *LocationInFile) AdvanceRune()
  • func (lif LocationInFile) String() string
• type StateFunc
  • func MatchString(s string, token interface{}, success StateFunc) StateFunc
• type TokenFunc

Functions

func Run

func Run(inputName string, input io.Reader, initState StateFunc, tokenFunc TokenFunc) error

Types

type Context

type Context interface {
	// Token returns the currently accumulated token string.
	Token() string
	// Emit will run the TokenFunc provided to Run with the given token.
	Emit(token interface{})
	// Clear clears the currently accumulated token string.
	Clear()
	// Error ends the lexing process, and causes run to return an error with err in its history.
	// The StateFunc returned by Error should be returned immediately.
	Error(err error) StateFunc
}

type LocationInFile

type LocationInFile struct {
	File string
	Line int
	Rune int
}

func (*LocationInFile) AdvanceLine

func (lif *LocationInFile) AdvanceLine()

func (*LocationInFile) AdvanceRune

func (lif *LocationInFile) AdvanceRune()

func (LocationInFile) String

func (lif LocationInFile) String() string

type StateFunc

type StateFunc func(ctx Context, in rune) StateFunc

func MatchString

func MatchString(s string, token interface{}, success StateFunc) StateFunc

type TokenFunc

type TokenFunc func(token interface{}) error