sexp

README

Go(lang) S-expression Parser

This is a fork of https://bitbucket.org/shanehanna/sexp, with improved error handling.

Description.

A Go S-expression parser.

go get github.com/abesto/sexp

Documentation

Index

• func Marshal(data interface{}, canonical bool) ([]byte, error)
• func NewLexer(input []byte) *lexer
• func Unmarshal(data []byte) ([]interface{}, error)
• type Item
  • func (item Item) String() string
• type ItemType
• type Sexp
  • func New(data ...interface{}) (*Sexp, error)
  • func Parse(data []byte) (*Sexp, error)
  • func (s *Sexp) Array() ([]interface{}, error)
  • func (s *Sexp) At(index int) *Sexp
  • func (s *Sexp) Bytes() ([]byte, error)
  • func (s *Sexp) Encode(canonical bool) ([]byte, error)
  • func (s *Sexp) Pop() (*Sexp, error)
  • func (s *Sexp) Push(data ...interface{}) error

Functions

func Marshal

func Marshal(data interface{}, canonical bool) ([]byte, error)

func NewLexer

func NewLexer(input []byte) *lexer

Lex S-Expressions.

See http://people.csail.mit.edu/rivest/Sexp.txt

* Unlike the R.Rivest 1997 draft tokens will match any unicode letters. * Canonical S-Expressions may have spaces between atoms which isn't strictly correct.

func Unmarshal

func Unmarshal(data []byte) ([]interface{}, error)

Types

type Item

type Item struct {
	Type     ItemType
	Position int
	Value    []byte
}

func (Item) String

func (item Item) String() string

type ItemType

type ItemType int

const (
	ItemEOF ItemType = iota
	ItemError
	ItemBracketLeft  // (
	ItemBracketRight // )
	ItemToken        // abc        Token.
	ItemQuote        // "abc"      Quoted string. May also include length 3"abc"
	ItemVerbatim     // 3:abc      Length prefixed "verbatim" encoding.

)

type Sexp

type Sexp struct {
	// contains filtered or unexported fields
}

func New

func New(data ...interface{}) (*Sexp, error)

func Parse

func Parse(data []byte) (*Sexp, error)

func (*Sexp) Array

func (s *Sexp) Array() ([]interface{}, error)

func (*Sexp) At

func (s *Sexp) At(index int) *Sexp

func (*Sexp) Bytes

func (s *Sexp) Bytes() ([]byte, error)

func (*Sexp) Encode

func (s *Sexp) Encode(canonical bool) ([]byte, error)

func (*Sexp) Pop

func (s *Sexp) Pop() (*Sexp, error)

func (*Sexp) Push

func (s *Sexp) Push(data ...interface{}) error