regx

Documentation

Index

• Constants
• func Compile(r []rune) bool
• func Init()
• func Match(t runes.Text, r []rune, startp int, eof int, rp *Ranges) bool
• func MatchBackward(t runes.Text, startp int, rp *Ranges) bool
• func Null() bool
• type Ilist
• type Inst
• type Node
• type Ranges

Constants

const (
	OPERATOR = 0x1000000    /* Bit set in all operators */
	START    = OPERATOR + 0 /* Start, used for marker on stack */
	RBRA     = OPERATOR + 1 /* Right bracket,  */
	LBRA     = OPERATOR + 2 /* Left bracket,  */
	OR       = OPERATOR + 3 /* Alternation, | */
	CAT      = OPERATOR + 4 /* Concatentation, implicit operator */
	STAR     = OPERATOR + 5 /* Closure, * */
	PLUS     = OPERATOR + 6 /* a+ == aa* */
	QUEST    = OPERATOR + 7 /* a? == a|nothing, i.e. 0 or 1 a's */
	ANY      = 0x2000000    /* Any character but newline, . */
	NOP      = ANY + 1      /* No operation, internal use only */
	BOL      = ANY + 2      /* Beginning of line, ^ */
	EOL      = ANY + 3      /* End of line, $ */
	CCLASS   = ANY + 4      /* Character class, [] */
	NCCLASS  = ANY + 5      /* Negated character class, [^] */
	END      = ANY + 0x77   /* Terminate: match found */

	ISATOR = OPERATOR
	ISAND  = ANY

	QUOTED = 0x4000000 /* Bit set for \-ed lex characters */
)

* Actions and Tokens * * 0x10000xx are operators, value == precedence * 0x20000xx are tokens, i.e. operands for operators

const DCLASS = 10 /* allocation increment */

const NLIST = 127

const NPROG = 1024

const NRange = 10

const NSTACK = 20

Functions

func Compile

func Compile(r []rune) bool

func Init

func Init()

func Match

func Match(t runes.Text, r []rune, startp int, eof int, rp *Ranges) bool

either t!=nil or r!=nil, and we match the string in the appropriate place

func MatchBackward

func MatchBackward(t runes.Text, startp int, rp *Ranges) bool

func Null

func Null() bool

Types

type Ilist

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

type Inst

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

type Node

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

type Ranges

type Ranges struct {
	R [NRange]runes.Range
}

var Sel Ranges