lec 10

lectures/10/client.ml

@@ -0,0 +1,41 @@
+(*
+org(123,BCIT)
+org(345,Hell Holdings\, Ltd)
+person(666,name(monty,burns))
+org(456,Ocaml \(LLC\))
+*)
+open Angstrom
+
+type name = Name of string * string
+type client = Person of int * name | Org of int * string
+
+let name first last = Name (first, last)
+let person id name = Person (id, name)
+let org id name = Org (id, name)
+
+let a_char =
+  (string "\\(" *> return '(') <|>
+  (string "\\)" *> return ')') <|>
+  (string "\\," *> return ',') <|>
+  (string "\\n" *> return '\n') <|>
+  satisfy (fun c -> c <> '(' && c <> ')' && c <> ',' && c <> '\n')
+
+let a_string =
+  many1 a_char >>| fun l -> l |> List.to_seq |> String.of_seq
+
+
+let uint = take_while1 (function | '0'..'9' -> true | _ -> false) >>| int_of_string
+
+let a_name = name <$> string "name(" *> a_string <* char ',' <*> a_string <* char ')'
+
+let a_person = person <$> string "person(" *> uint <* char ',' <*> a_name <* char ')'
+
+let an_org = org <$> string "org(" *> uint <* char ',' <*> a_string <* char ')'
+
+let a_client = a_person <|> an_org
+                                       
+let parse file =
+  let ic = open_in file in
+  let content = really_input_string ic (in_channel_length ic) in
+  parse_string ~consume:All (many (a_client <* end_of_line)) content
+