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type CaptureFunc ¶

type CaptureFunc func(Matchable) error

type ListOfMatchable ¶

type ListOfMatchable interface {
	Get(i int) Matchable
	Len() int
}

ListOfMatchable is anything list-like that contains Matchable items. This allows us to convert a slice of []T as a []Matchable when *T implements Matchable. In the future, this may not be required if Go generics allows us to say S ~[]T, and *T implements Matchable. This may also not be required if we move this out of its own package and depend on Multiaddr and Components directly.

type MatchState ¶

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

MatchState is the Thompson NFA for a regular expression.

func (s MatchState) String() string

type Matchable ¶

type Matchable interface {
	Code() int
	// Value() returns the string representation of the matchable.
	Value() string
	// RawValue() returns the byte representation of the Value
	RawValue() []byte
	// Bytes() returns the underlying bytes of the matchable. For multiaddr
	// Components, this includes the protocol code and possibly the varint
	// encoded size.
	Bytes() []byte
}

Matchable is an interface for any thing that can be matched against by this package. In the future, we may use multiaddr.Component types directly.

type Matcher ¶

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

Matcher holds a graph of match state nodes. Use PatternToMatcher to create.

func PatternToMatcher(patterns ...Pattern) Matcher

func (s Matcher) String() string

type Pattern ¶

type Pattern = func(states []MatchState, nextIdx int) ([]MatchState, int)

Pattern is a curried MatchState. Given the slice of current MatchStates and a handle (int index) to the next MatchState, it returns a (possibly modified) slice of next MatchStates and handle to the inserted MatchState.

func CaptureBytes(code int, val *[]byte) Pattern

func CaptureOneOrMoreBytes(code int, vals *[][]byte) Pattern

func CaptureOneOrMoreStrings(code int, vals *[]string) Pattern

func CaptureString(code int, val *string) Pattern

func CaptureWithF(code int, f CaptureFunc) Pattern

func CaptureZeroOrMoreBytes(code int, vals *[][]byte) Pattern

func CaptureZeroOrMoreStrings(code int, vals *[]string) Pattern

func CaptureZeroOrMoreWithF(code int, f CaptureFunc) Pattern

func Cat(patterns ...Pattern) Pattern

func OneOrMore(code int) Pattern

func Optional(s Pattern) Pattern

func Or(p ...Pattern) Pattern

func Val(code int) Pattern

func ZeroOrMore(code int) Pattern