optional/default are not wokring with segment

Hi,

It seems segment never fails and return empty string in case of failure.
optional and default break because of this.

Can you post a try.purescript.org reproduction? I believe you have misdiagnosed your issue. segment is Parser.take, which does not operate the way you are describing.

purescript-routing-duplex/src/Routing/Duplex/Parser.purs

Lines 207 to 211 in 13702d4

    
           take :: RouteParser String 
        
           take = Chomp \state -> 
        
             case Array.uncons state.segments of 
        
               Just { head, tail } -> Success (state { segments = tail }) head 
        
               _ -> Fail EndOfPath

Yep the issue happens not always, but only when segment is empty.
So default "expect" segment works for parsing empty string but not "/"
If route is a complex object it contains multiple segments.
So following paths "/////" "/" "////" produce different Routes.

https://try.purescript.org/?code=LTBQFsHsBMFcBsCmACAsgQwJYDtkHcALRAJ0VHM3AAdJiAXZABVPlmhQM2hwHNkAKfgHoAlCIrVaDACLo66AHQBlApDwKA4omwlMAY1CUa9ZLPmbtuvQoBKiKockmbkWHV4LpsKkgAej4wYXNw8vH0RfZHQAZ2QbaQCpONd3bB5Pbz8LHWJ9ROcU0MyI7KtlAE9seX8jJIBRADMGxD06BQBhSGxoyCR8mTlFAEFiYnRyqNih-tNB5TpctMnkJRmzRSUFj07wKFwYlbW55kgG2GxW2mRycHRiaIJ0eGQALhfQZGS3RDC-AHIVlslsAAHwfL50H7FXwAgCSVQgdweT2QAF5kNxblRkA1kDxwYQSGRPp9cejtHoYMSSXx0VQkWRyPT7ig3oDFnxQch4XRQMzoih0UoFEg0nQCOQKVTXi9uVVkFzNhzQFL2MhcEKFAArSA4ADqmHFyAARMbkAASZBDBSkHz6OQoXDG4DG8iInBojGQcHwSB8S0PNQCeIKfkofgh9gNdAIBjGuq%2BKgtSHQM0CnjgbR0EQmoTG8SfX3%2Bk0RJOtRDQZAAdmQACM3HjIAwAAyys0AHhByEDeGD0lDDL7CijMfgDBr-Fu90ez3TmaqYlz%2Bbd5E%2B4PBQA

That is expected. Internally we do not normalize paths, as this is no longer bidirectional from the source input. If you have a leading /, then that's what the root combinator is for. You can choose to implement normalization yourself (you may not care about strict bidirectionality) by constructing your own pass on top of parsePath.

https://github.com/natefaubion/purescript-routing-duplex/blob/master/src/Routing/Duplex/Parser.purs#L164

	take :: RouteParser String
	take = Chomp \state ->
	case Array.uncons state.segments of
	Just { head, tail } -> Success (state { segments = tail }) head
	_ -> Fail EndOfPath