package extlib
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extlib
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package extlib
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Polymorphic Map.
This is a polymorphic map, similar to standard library Map module but in a defunctorized style.
val empty : ('a, 'b) tThe empty map, using compare as key comparison function.
val is_empty : ('a, 'b) t -> boolreturns true if the map is empty.
val create : ('a -> 'a -> int) -> ('a, 'b) tcreates a new empty map, using the provided function for key comparison.
add x y m returns a map containing the same bindings as m, plus a binding of x to y. If x was already bound in m, its previous binding disappears.
val find : 'a -> ('a, 'b) t -> 'bfind x m returns the current binding of x in m, or raises Not_found if no such binding exists.
remove x m returns a map containing the same bindings as m, except for x which is unbound in the returned map.
val mem : 'a -> ('a, 'b) t -> boolmem x m returns true if m contains a binding for x, and false otherwise.
val exists : 'a -> ('a, 'b) t -> boolsame as mem.
val iter : ('a -> 'b -> unit) -> ('a, 'b) t -> unititer f m applies f to all bindings in map m. f receives the key as first argument, and the associated value as second argument. The order in which the bindings are passed to f is unspecified. Only current bindings are presented to f: bindings hidden by more recent bindings are not passed to f.
map f m returns a map with same domain as m, where the associated value a of all bindings of m has been replaced by the result of the application of f to a. The order in which the associated values are passed to f is unspecified.
Same as map, but the function receives as arguments both the key and the associated value for each binding of the map.
val fold : ('b -> 'c -> 'c) -> ('a, 'b) t -> 'c -> 'cfold f m a computes (f kN dN ... (f k1 d1 a)...), where k1 ... kN are the keys of all bindings in m, and d1 ... dN are the associated data. The order in which the bindings are presented to f is unspecified.
val foldi : ('a -> 'b -> 'c -> 'c) -> ('a, 'b) t -> 'c -> 'cSame as fold, but the function receives as arguments both the key and the associated value for each binding of the map.