module Exceptionless: sig .. end
Exceptionless counterparts for error-raising operations
val find : ('a -> bool) -> 'a list -> 'a option
find p l returns Some x where x is the first element
of l such as p x returns true or None if such an
element has not been found.
val rfind : ('a -> bool) -> 'a list -> 'a option
rfind p l returns Some x where x is the last element of l such
that p x returns true or None if such element as not been found.
val findi : (int -> 'a -> bool) -> 'a list -> (int * 'a) option
findi p e l returns Some (i, ai) where ai and i are respectively the
first element of l and its index, such that p i ai is true,
or None if no such element has been found.
val split_at : int -> 'a list -> [ `Invalid_argument of string | `Ok of 'a list * 'a list ]
Whenever n is inside of l size bounds, split_at n l returns
Ok(l1,l2), where l1 contains the first n elements of l and l2
contains the others. Otherwise, returns `Invalid_index n
val at : 'a list -> int -> [ `Invalid_argument of string | `Ok of 'a ]
If n is inside the bounds of l, at l n returns Ok x, where
x is the n-th element of the list l. Otherwise, returns Error
(`Invalid_index(n)).
val assoc : 'a -> ('a * 'b) list -> 'b option
assoc a l returns Some b where b is the value associated with key a
in the list of pairs l. That is, assoc a [ ...; (a,b); ...] = Some b
if (a,b) is the leftmost binding of a in list l.
Return None if there is no value associated with a in the
list l.
val assoc_inv : 'a -> ('b * 'a) list -> 'b option
assoc_inv b l returns Some a where a is the key associated with value a
in the list of pairs l. That is, assoc b [ ...; (a,b); ...] = Some a
if (a,b) is the leftmost binding of a in list l.
Return None if there is no key associated with b in the
list l.
val assq : 'a -> ('a * 'b) list -> 'b option