event

Documentation

Overview

Package event implements the events that cause transitions between FSA states.

* Unicode classes: number, letter, upcase, lowcase, space * Ranges: any, anyof, not * CharLit

Index

• func GetOrdered(items ...*item.Item) (events []ast.LexBase)
• type TriState
  • func Subset(a, b ast.LexBase) TriState

Functions

func GetOrdered

func GetOrdered(items ...*item.Item) (events []ast.LexBase)

GetOrdered returns the set of unique transition events for items, ordered by the event precidence.

Types

type TriState

type TriState int

TriState has range: {True, False, Undefined}

const (
	// Undefined is a TriState value
	Undefined TriState = iota
	// False is a TriState value
	False
	// True is a TriState value
	True
)

func Subset

func Subset(a, b ast.LexBase) TriState

Subset returns True if a is a subset of b, False if a is not a subset of b, and Undefined if the subset relationship is not defined between a and b