lexer

Documentation

Index

• type Lexer
  • func New(src *ast.Source) Lexer
  • func (s *Lexer) ReadToken() (Token, error)
• type Token
  • func (t Token) String() string
• type Type
  • func (t Type) Name() string
  • func (t Type) String() string

Types

type Lexer

type Lexer struct {
	*ast.Source
	// contains filtered or unexported fields
}

Lexer turns graphql request and schema strings into tokens

func New

func New(src *ast.Source) Lexer

func (*Lexer) ReadToken

func (s *Lexer) ReadToken() (Token, error)

ReadToken gets the next token from the source starting at the given position.

This skips over whitespace and comments until it finds the next lexable token, then lexes punctuators immediately or calls the appropriate helper function for more complicated tokens.

type Token

type Token struct {
	Kind  Type         // The token type.
	Value string       // The literal value consumed.
	Pos   ast.Position // The file and line this token was read from
}

func (Token) String

func (t Token) String() string

type Type

type Type int

Kind represents a type of token. The types are predefined as constants.

const (
	Invalid Type = iota
	EOF
	Bang
	Dollar
	Amp
	ParenL
	ParenR
	Spread
	Colon
	Equals
	At
	BracketL
	BracketR
	BraceL
	BraceR
	Pipe
	Name
	Int
	Float
	String
	BlockString
	Comment
)

func (Type) Name

func (t Type) Name() string

func (Type) String

func (t Type) String() string