3 -behavior(hope_gen_monad).
27 -spec put(A, fun((A) -> boolean())) ->
35 -spec get(t(A), Default :: A) ->
37 get({some, X}, _) -> X;
45 -spec map(t(A), fun((A) -> (B))) ->
47 map({some, X}, F) -> {some, F(X)};
48 map(none , _) -> none.
50 -spec iter(t(A), fun((A) -> (ok))) ->
52 iter({some, X}, F) -> ok = F(X);
55 -spec pipe([fun((A) -> t(B))], A) ->
62 ; {some, Y} -> pipe(Fs, Y)
65 -spec of_result(hope_result:t(A, _B)) ->
67 of_result({ok, X}) -> {some, X};
68 of_result({error, _}) -> none.
70 -spec of_undefined(undefined | A) ->
72 of_undefined(undefined) -> none;
73 of_undefined(X) -> {some, X}.