module Variable_map2: Index.Map2
with type key0 = Variable.t and type key1 = Variable.t
type
key0
Type of indexed objects, which serve as the first map key.
type
key1
Type of the second map key.
type 'a
t
Maps indexed by a key from key0
and a key from key1
.
val create : int -> int -> 'a t
create n m
creates a new, empty map. The initial storage
allocated is sufficient for n * m
entries.
val mem : 'a t -> key0 -> key1 -> bool
mem m i j
if m
maps the keys i
and j
to some value.
val find : 'a t -> key0 -> key1 -> 'a
find m i j
is the element m
maps i
and j
to.
Raises Not_found
if m
has no value for the keys i
and j
.
val set : 'a t -> key0 -> key1 -> 'a -> unit
set m i j x
modifies
m
by mapping the keys
i
and
j
to
x
.
val remove : 'a t -> key0 -> key1 -> unit
remove m i j
removes any value associated with
i
and
j
by
m
.
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