crun

README

Generate matching strings based on regular expressions

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Example

# Generates a number of all possible combinations of 1 to 6 digits in length
> crun "\d{1,6}"

# Generate random 5 possibilities
> crun -r -l 5 "(root|admin):[0-9]{4,5}"

Download & Install

go get -u -v github.com/wzshiming/crun/cmd/crun

License

Pouch is licensed under the MIT License. See LICENSE for the full license text.

Documentation

Index

• Constants
• type Op
  • func (i Op) String() string
• type Optional
  • func (o *Optional) NewRegexps(reg *syntax.Regexp) (out Regexps)
• type Rand
• type Regexp
• type Regexps
  • func Compile(str string) (Regexps, error)
  • func MustCompile(str string) Regexps
  • func NewRegexps(reg *syntax.Regexp) (out Regexps)
  • func (r Regexps) Rand() string
  • func (r Regexps) RandSource(rand Rand) string
  • func (r Regexps) RandSourceWithRunes(rand Rand) []rune
  • func (r Regexps) RandWithRunes() []rune
  • func (r Regexps) Range(f func(string) bool) bool
  • func (r Regexps) RangeWithRunes(f func([]rune) bool) bool
  • func (r Regexps) Size() int

Constants

const MoreTimes = 18

MoreTimes Maximum omitted default value

Types

type Op

type Op uint8

An Op is a single regular expression operator.

const (
	OpLiteral Op
	OpRepeat
	OpAlternate
)

Operators are listed in precedence order, tightest binding to weakest.

func (Op) String

func (i Op) String() string

type Optional

type Optional struct {
	MoreTimes    int
	AnyCharNotNL []rune
	AnyChar      []rune
	Rand         Rand
}

Optional is optional related option for regexps

func (*Optional) NewRegexps

func (o *Optional) NewRegexps(reg *syntax.Regexp) (out Regexps)

NewRegexps returns regexps translated from regexp/syntax

type Rand

type Rand interface {
	Int() int
}

type Regexp

type Regexp struct {
	Op       Op
	Sub      []Regexps
	Rune     []rune
	Min, Max int
}

Regexp syntax tree translated from regexp/syntax

type Regexps

type Regexps []*Regexp

Regexps syntax tree translated from regexp/syntax

func Compile

func Compile(str string) (Regexps, error)

Compile parses a regular expression and returns.

func MustCompile

func MustCompile(str string) Regexps

MustCompile is like Compile but panics if the expression cannot be parsed. It simplifies safe initialization of global variables holding compiled regular expressions.

func NewRegexps

func NewRegexps(reg *syntax.Regexp) (out Regexps)

NewRegexps returns regexps translated from regexp/syntax

func (Regexps) Rand

func (r Regexps) Rand() string

Rand possibilities

func (Regexps) RandSource

func (r Regexps) RandSource(rand Rand) string

RandSource possibilities

func (Regexps) RandSourceWithRunes

func (r Regexps) RandSourceWithRunes(rand Rand) []rune

RandSourceWithRunes possibilities

func (Regexps) RandWithRunes

func (r Regexps) RandWithRunes() []rune

RandWithRunes possibilities

func (Regexps) Range

func (r Regexps) Range(f func(string) bool) bool

Range all possibilities

func (Regexps) RangeWithRunes

func (r Regexps) RangeWithRunes(f func([]rune) bool) bool

RangeWithRuns all possibilities

func (Regexps) Size

func (r Regexps) Size() int

Size The number of possibilities that can match regularity