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(* TEST
unset DOES_NOT_EXIST
*)
let () =
assert(Sys.getenv_opt "DOES_NOT_EXIST" = None);
assert(int_of_string_opt "foo" = None);
assert(int_of_string_opt "42" = Some 42);
assert(int_of_string_opt (String.make 100 '9') = None);
assert(Nativeint.of_string_opt "foo" = None);
assert(Nativeint.of_string_opt "42" = Some 42n);
assert(Nativeint.of_string_opt (String.make 100 '9') = None);
assert(Int32.of_string_opt "foo" = None);
assert(Int32.of_string_opt "42" = Some 42l);
assert(Int32.of_string_opt (String.make 100 '9') = None);
assert(Int64.of_string_opt "foo" = None);
assert(Int64.of_string_opt "42" = Some 42L);
assert(Int64.of_string_opt (String.make 100 '9') = None);
assert(bool_of_string_opt "" = None);
assert(bool_of_string_opt "true" = Some true);
assert(bool_of_string_opt "false" = Some false);
assert(float_of_string_opt "foo" = None);
assert(float_of_string_opt "42." = Some 42.);
assert(float_of_string_opt (String.make 1000 '9') = Some infinity);
assert(List.nth_opt [] 0 = None);
assert(List.nth_opt [42] 0 = Some 42);
assert(List.nth_opt [42] 1 = None);
assert(List.find_opt (fun _ -> true) [] = None);
assert(List.find_opt (fun x -> x > 10) [4; 42] = Some 42);
assert(List.assoc_opt 42 [] = None);
assert(List.assoc_opt 42 [41, false; 42, true] = Some true);
assert(List.assq_opt 42 [] = None);
assert(List.assq_opt 42 [41, false; 42, true] = Some true);
let h = Hashtbl.create 5 in
assert(Hashtbl.find_opt h 42 = None);
Hashtbl.add h 42 ();
assert(Hashtbl.find_opt h 42 = Some ());
let module IntSet = Set.Make(struct
type t = int
let compare = compare
end)
in
let set = IntSet.of_list [42; 43] in
assert(IntSet.min_elt_opt IntSet.empty = None);
assert(IntSet.min_elt_opt set = Some 42);
assert(IntSet.max_elt_opt IntSet.empty = None);
assert(IntSet.max_elt_opt set = Some 43);
assert(IntSet.choose_opt IntSet.empty = None);
assert(IntSet.choose_opt set <> None);
assert(IntSet.find_opt 42 IntSet.empty = None);
assert(IntSet.find_opt 42 set = Some 42);
assert(IntSet.find_opt 0 set = None);
let module IntMap = Map.Make(struct
type t = int
let compare = compare
end)
in
let map = IntMap.add 42 "42" (IntMap.add 43 "43" IntMap.empty) in
assert(IntMap.min_binding_opt IntMap.empty = None);
assert(IntMap.min_binding_opt map = Some (42, "42"));
assert(IntMap.max_binding_opt IntMap.empty = None);
assert(IntMap.max_binding_opt map = Some (43, "43"));
assert(IntMap.choose_opt IntMap.empty = None);
assert(IntMap.choose_opt map <> None);
assert(IntMap.find_opt 42 IntMap.empty = None);
assert(IntMap.find_opt 42 map = Some "42");
assert(IntMap.find_opt 0 map = None);
let s = "Hello world !" in
assert(String.index_opt s 'x' = None);
assert(String.index_opt s ' ' = Some 5);
assert(String.rindex_opt s 'x' = None);
assert(String.rindex_opt s ' ' = Some 11);
assert(String.index_from_opt s 0 'x' = None);
assert(String.index_from_opt s 6 ' ' = Some 11);
assert(String.rindex_from_opt s 0 'x' = None);
assert(String.rindex_from_opt s 6 ' ' = Some 5);
let module W = Weak.Make(struct
type t = int ref
let equal = (=)
let hash = Hashtbl.hash
end)
in
let w = W.create 10 in
let x = Random.int 42 in
let r = ref x in
assert (W.find_opt w r = None);
W.add w r;
assert (W.find_opt w r = Some r);
let stack = Stack.create () in
Stack.push 41 stack;
Stack.push 42 stack;
assert(Stack.top_opt stack = Some 42);
assert(Stack.pop_opt stack = Some 42);
assert(Stack.pop_opt stack = Some 41);
assert(Stack.pop_opt stack = None);
assert(Stack.top_opt stack = None);
let queue = Queue.create () in
Queue.add 41 queue;
Queue.add 42 queue;
assert(Queue.peek_opt queue = Some 41);
assert(Queue.take_opt queue = Some 41);
assert(Queue.take_opt queue = Some 42);
assert(Queue.take_opt queue = None);
assert(Queue.peek_opt queue = None);
()
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