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added member_force and assoc_force #199

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added member_force and assoc_force #199

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7 changes: 7 additions & 0 deletions lib/util.ml
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
exception Type_error of string * t
exception Missing_Member of string

let typeof = function
| `Assoc _ -> "object"
Expand Down Expand Up @@ -26,6 +27,12 @@ let member name = function
| `Assoc obj -> assoc name obj
| js -> typerr ("Can't get member '" ^ name ^ "' of non-object type ") js

let assoc_force name obj = try List.assoc name obj with Not_found -> raise (Missing_Member ("There is no member called " ^ name ^ "in the json object"))

let member_force name = function
| `Assoc obj -> assoc_force name obj
| js -> typerr ("Can't get member '" ^ name ^ "' of non-object type ") js

let rec path l obj =
match l with
| [] -> Some obj
Expand Down