parser

Documentation

Overview

Package parser implements spok's parser.

Spok is a very simple mostly declarative language and as such, the parser is incredibly simple. It is a simple top-down parser with a very small initial state space and requires only 1 token of lookahead.

It switches on the token it encounters to process the appropriate ast.Node (parseXXX methods), appending each to the list of nodes as it goes.

If the parser encounters an error, either an ERROR token from the lexer, or an error of it's own making it will immediately return with the AST it's managed to parse so far and the error.

Index

• type Parser
  • func New(input string) *Parser
  • func (p *Parser) Parse() (ast.Tree, error)

Types

type Parser

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

Parser is spok's AST parser.

func New

func New(input string) *Parser

New creates and returns a new Parser for an input string.

func (*Parser) Parse

func (p *Parser) Parse() (ast.Tree, error)

Parse is the top level parse method. It parses the entire input text to EOF or Error and returns the full AST.