Sprache - combination of parsers

Question

Using Sprache I have parsers, A,B,C,D which matches with different input parts, and selects (returns) different class instances. In my input there are a lot of parts in a random order, eq. "abaabccbdbabddba". I need to select all 'a'-s and 'b'-s and so on - order is irrelevant:

  from a_list in A.Many()
  from b_list in B.Many()
  from c_list in C.Many()
  from d_list in D.Many()

won't work this way. How can I describe this situation (best way) in Sprache?

have you tried using `Parser Or(this Parser first, Parser second)` — Random Dev, Sep 15 '15 at 05:54
No :( It doesn't. For some reason it finds only the first instances of A and B, not all instances. Probably the parse stops too early for some reason ... — Zoltan Hernyak, Sep 15 '15 at 06:48
most likely you missed a `.Many()` somewhere - can you please add the comment to your question (it's really almost unreadable) - also a simple runable example would be great (just give a piece of code we can compile/run that will demonstrate your problem) - right now we see nothing of your actual definitions — Random Dev, Sep 15 '15 at 07:14
Yeah, it works. I found the bug in my language description. Thank you for your supports! :) — Zoltan Hernyak, Sep 30 '15 at 12:51

M.Hassan · Answer 1 · 2021-12-10T15:22:54.927

Old questions since 6 years with no answer. The next code may help someone:

  var segment=
                from start in Parse.Letter.Once()
                let a =start.First()
                from rest in Parse.Chars(a).Many()
                select start.Concat(rest);            
            var allSegments = segment.Many();
        
        //test
            var text = "abaabccbdbabddba";         
            var result=allSegments.Parse(text);

output:

aa
cc
dd

Try it

Sprache - combination of parsers

1 Answers1