parser

Documentation

Index

• func ParseIO(src io.Reader, fileName string) (ast.Node, error)
• func ParseString(src string, fileName string) (ast.Node, error)
• type Lexer
  • func NewLexer(src io.Reader, fileName string) Lexer
• type ParseError
• type Token

Functions

func ParseIO

func ParseIO(src io.Reader, fileName string) (ast.Node, error)

func ParseString

func ParseString(src string, fileName string) (ast.Node, error)

Types

type Lexer

type Lexer interface {
	Lex() (Token, error)
}

Lexer is YAS lexical analizer.

func NewLexer

func NewLexer(src io.Reader, fileName string) Lexer

NewLexer creates a new instance of YAS lexer and return it. `fileName` is used for some error message.

type ParseError

type ParseError interface {
	error
	FileName() string
	Line() int
	Column() int
}

ParseError represents parsing failure with some location of cause

type Token

type Token interface {
	Kind() int
	Value() interface{}
	Line() int
	Column() int
}

Token are results of `Lexer.Lex`. Entity of `Value` depends on `Kind`.