package pomap

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Module Pomap_impl.MakeSource

Parameters

Signature

Modules and types

Store module used to store nodes of the partially ordered map.

Sourcetype key = PO.el

Type of map keys

Sourcetype +'a node

Type of nodes in the partially ordered map

Sourcetype +'a pomap

Type of partially ordered maps

Sourcetype +'a add_find_result =
  1. | Found of Store.Ix.t * 'a node
  2. | Added of Store.Ix.t * 'a node * 'a pomap

Type of result originating from an add_find operation

Map-constructors

Sourceval empty : 'a pomap

The empty partially ordered map.

Sourceval singleton : key -> 'a -> 'a pomap

singleton k el

  • returns

    a partially ordered map containing as only binding the one from k to el.

Information on maps

Sourceval is_empty : 'a pomap -> bool

is_empty pm tests whether partially ordered map pm is empty.

Sourceval cardinal : 'a pomap -> int

cardinal pm

  • returns

    the number of elements in pm.

Adding and removing

Sourceval add : key -> 'a -> 'a pomap -> 'a pomap

add k el pm

  • returns

    a partially ordered map containing the same bindings as pm, plus a binding of k to el. If k was already bound in pm, its previous binding disappears.

Sourceval add_node : 'a node -> 'a pomap -> 'a pomap

add_node node pm

  • returns

    a partially ordered map containing the same bindings as pm plus a binding as represented by node. If the associated key already existed in pm, its previous binding disappears.

Sourceval remove : key -> 'a pomap -> 'a pomap

remove k pm

  • returns

    a map containing the same bindings as pm except for the node with key k.

Sourceval remove_node : 'a node -> 'a pomap -> 'a pomap

remove_node node pm

  • returns

    a map containing the same bindings as pm except for the one with the key of node.

Sourceval remove_ix : Store.Ix.t -> 'a pomap -> 'a pomap

remove_ix ix pm

  • returns

    a map containing the same bindings as pm except for the node indexed by ix.

  • raises Not_found

    if ix does not index any node.

Sourceval take : key -> 'a pomap -> Store.Ix.t * 'a node * 'a pomap

take k pm

  • returns

    a tuple (ix, node, map), where ix is the index of the node associated with key k in pm, and map is pm without this element.

  • raises Not_found

    if there is no binding for key.

Sourceval take_ix : Store.Ix.t -> 'a pomap -> 'a node * 'a pomap

take_ix ix pm

  • returns

    a tuple (n, m), where n is the node associated with index ix, and m is a map without this element.

  • raises Not_found

    if ix does not index any node.

Sourceval add_find : key -> 'a -> 'a pomap -> 'a add_find_result

add_find k el pm similar to add, but if the binding did already exist, then Found (ix, node) will be returned to indicate the index and node under which key k is bound. Otherwise Added (new_ix, new_pm) will be returned to indicate that k was bound under new index new_ix in the partially ordered map new_pm.

Sourceval add_fun : key -> 'a -> ('a -> 'a) -> 'a pomap -> 'a pomap

add_fun k el f pm similar to add, but if the binding already existed, then function f will be applied to the previously bound data. Otherwise the binding will be added as in add.

Scanning and searching

Sourceval mem : key -> 'a pomap -> bool

mem k pm

  • returns

    true if pm contains a binding for key k and false otherwise.

Sourceval mem_ix : Store.Ix.t -> 'a pomap -> bool

mem el pm

  • returns

    true if pm contains a binding for data element el and false otherwise.

Sourceval find : key -> 'a pomap -> Store.Ix.t * 'a node

find k pm

  • returns

    a tuple (ix, node), where ix is the index of key k and node its associated node in map pm.

Sourceval find_ix : Store.Ix.t -> 'a pomap -> 'a node

find_ix ix pm

  • returns

    the node associated with index ix in map pm.

  • raises Not_found

    if such a node does not exist.

Sourceval choose : 'a pomap -> Store.Ix.t * 'a node

choose pm

  • returns

    a tuple (ix, node), where ix is the index of the node of some unspecified element in pm.

Sourceval filter : (Store.Ix.t -> 'a node -> bool) -> 'a pomap -> 'a pomap

filter p pm

  • returns

    the map of all elements in pm that satisfy p.

Sourceval partition : (Store.Ix.t -> 'a node -> bool) -> 'a pomap -> 'a pomap * 'a pomap

partition p pm

  • returns

    a pair of maps (pm1, pm2), where pm1 is the map of all the elements of pm that satisfy the predicate p, and pm2 is the map of all the elements of pm that do not satisfy p.

Iterators

Sourceval iter : ('a node -> unit) -> 'a pomap -> unit

iter f pm applies f to all bound nodes in map pm. The order in which the nodes are passed to f is unspecified. Only current bindings are presented to f: bindings hidden by more recent bindings are not passed to f.

Sourceval iteri : (Store.Ix.t -> 'a node -> unit) -> 'a pomap -> unit

iteri f pm same as iter, but function f also receives the index associated with the nodes.

Sourceval map : ('a node -> 'b) -> 'a pomap -> 'b pomap

map f pm

  • returns

    a map with all nodes in pm mapped from their original value to identical nodes whose data element is in the codomain of f. The order in which nodes are passed to f is unspecified.

Sourceval mapi : (Store.Ix.t -> 'a node -> 'b) -> 'a pomap -> 'b pomap

mapi f pm same as map, but function f also receives the index associated with the nodes.

Sourceval fold : ('a node -> 'b -> 'b) -> 'a pomap -> 'b -> 'b

fold f pm a computes (f nN ... (f n1 a) ...), where n1 ... nN are the nodes in map pm. The order in which the nodes are presented to f is unspecified.

Sourceval foldi : (Store.Ix.t -> 'a node -> 'b -> 'b) -> 'a pomap -> 'b -> 'b

foldi f pm a same as fold, but function f also receives the index associated with the nodes.

Sourceval topo_fold : ('a node -> 'b -> 'b) -> 'a pomap -> 'b -> 'b

topo_fold f pm a computes (f nN ... (f n1 a) ...), where n1 ... nN are the nodes in map pm sorted in ascending topological order. Slower than fold.

Sourceval topo_foldi : (Store.Ix.t -> 'a node -> 'b -> 'b) -> 'a pomap -> 'b -> 'b

topo_foldi f pm a same as topo_fold, but function f also receives the index associated with the nodes.

Sourceval topo_fold_ix : (Store.Ix.t -> 'b -> 'b) -> 'a pomap -> 'b -> 'b

topo_fold_ix f pm a same as topo_fold, but function f only receives the index associated with the nodes.

Sourceval rev_topo_fold : ('a node -> 'b -> 'b) -> 'a pomap -> 'b -> 'b

rev_topo_fold f pm a computes (f nN ... (f n1 a) ...), where n1 ... nN are the nodes in map pm sorted in descending topological order. Slower than fold.

Sourceval rev_topo_foldi : (Store.Ix.t -> 'a node -> 'b -> 'b) -> 'a pomap -> 'b -> 'b

rev_topo_foldi f pm a same as rev_topo_fold, but function f also receives the index associated with the nodes.

Sourceval rev_topo_fold_ix : (Store.Ix.t -> 'b -> 'b) -> 'a pomap -> 'b -> 'b

rev_topo_fold_ix f pm a same as rev_topo_fold, but function f only receives the index associated with the nodes.

Sourceval chain_fold : ('a node list -> 'b -> 'b) -> 'a pomap -> 'b -> 'b

chain_fold f pm a computes (f cN ... (f c1 a) ...), where c1 ... cN are the ascending chaines of nodes in map pm. Only useful for small maps, because of potentially exponential complexity.

Sourceval chain_foldi : ((Store.Ix.t * 'a node) list -> 'b -> 'b) -> 'a pomap -> 'b -> 'b

chain_foldi f pm a same as chain_fold, but function f receives chains including the index associated with the nodes.

Sourceval rev_chain_fold : ('a node list -> 'b -> 'b) -> 'a pomap -> 'b -> 'b

rev_chain_fold f pm a computes (f cN ... (f c1 a) ...), where c1 ... cN are the descending chaines of nodes in map pm. Only useful for small maps, because of potentially exponential complexity.

Sourceval rev_chain_foldi : ((Store.Ix.t * 'a node) list -> 'b -> 'b) -> 'a pomap -> 'b -> 'b

rev_chain_foldi f pm a same as rev_chain_fold, but function f receives chains including the index associated with the nodes.

Set-like map-operations

Sourceval union : 'a pomap -> 'a pomap -> 'a pomap

union pm1 pm2 merges pm1 and pm2, preserving the bindings of pm1.

Sourceval inter : 'a pomap -> 'a pomap -> 'a pomap

inter pm1 pm2 intersects pm1 and pm2, preserving the bindings of pm1.

Sourceval diff : 'a pomap -> 'a pomap -> 'a pomap

diff pm1 pm2 removes all elements of pm2 from pm1.

Node-creators and accessors

Sourceval create_node : key -> 'a -> Store.Ix.Set.t -> Store.Ix.Set.t -> 'a node

create_node k el sucs prds

  • returns

    a node with key k, data element el, successors sucs and predecessors prds.

Sourceval get_key : 'a node -> key

get_key n

  • returns

    the key associated with node n.

Sourceval get_el : 'a node -> 'a

get_el n

  • returns

    the data element associated with node n.

Sourceval get_sucs : 'a node -> Store.Ix.Set.t

get_sucs n

  • returns

    the successors associated with node n.

Sourceval get_prds : 'a node -> Store.Ix.Set.t

get_prds n

  • returns

    the predecessors associated with node n.

Sourceval set_key : 'a node -> key -> 'a node

set_key n k sets the key of node n to k and returns new node.

Sourceval set_el : 'a node -> 'a -> 'a node

set_el n el sets the data element of node n to el and returns new node.

Sourceval set_sucs : 'a node -> Store.Ix.Set.t -> 'a node

set_sucs n sucs set the successors of node n to sucs and returns new node.

Sourceval set_prds : 'a node -> Store.Ix.Set.t -> 'a node

set_prds n prds set the predecessors of node n to prds and returns new node.

Map-accessors

Sourceval get_nodes : 'a pomap -> 'a node Store.t

get_nodes pm

  • returns

    the store of nodes associated with partially ordered map pm. This store represents the Hasse-graph of the nodes partially ordered by their keys.

Sourceval get_top : 'a pomap -> Store.Ix.Set.t

get_top pm

  • returns

    the set of node indices of nodes that are greater than any other node in pm but themselves.

Sourceval get_bot : 'a pomap -> Store.Ix.Set.t

get_bot pm

  • returns

    the set of node indices of nodes that are lower than any other node in pm but themselves.

Operations over equivalences of data elements

Sourceval remove_eq_prds : ('a -> 'a -> bool) -> 'a pomap -> 'a pomap

remove_eq_prds eq pm

  • returns

    a map containing the same bindings as pm except for nodes whose non-empty predecessors all have the same data element as identified by eq.

Sourceval fold_eq_classes : ('a -> 'a -> bool) -> ('a -> 'a pomap -> 'b -> 'b) -> 'a pomap -> 'b -> 'b

fold_eq_classes eq f pm a factorizes pm into maximal equivalence classes of partial orders: all bindings in each class have equivalent data elements as identified by eq and are connected in the original Hasse-diagram. This function then computes (f ec_elN ecN ... (f ec_el1 ec1 a)), where ec1 ... ecN are the mentioned equivalence classes in unspecified order, and ec_el1 ... ec_elN are their respective common data elements.

Sourceval fold_split_eq_classes : ('a -> 'a -> bool) -> ('a -> 'a pomap -> 'b -> 'b) -> 'a pomap -> 'b -> 'b

fold_split_eq_classes eq f pm a same as fold_eq_classes, but the equivalence classes are split further so that no element of other classes would fit between its bottom and top elements. It is unspecified how non-conflicting elements are assigned to upper or lower classes!

Sourceval preorder_eq_classes : ('a -> 'a -> bool) -> 'a pomap -> 'a pomap list

preorder_eq_classes eq pm

  • returns

    a preordered list of equivalence classes, the latter being defined as in fold_split_eq_classes.

Sourceval topo_fold_reduced : ('a -> 'a -> bool) -> ('a node -> 'b -> 'b) -> 'a pomap -> 'b -> 'b

topo_fold_reduced eq f pm a computes (f nN ... (f n1 a) ...), where n1 ... nN are those nodes in map pm sorted in ascending topological order, whose data element is equivalent as defined by eq to the one of lower elements if there are no intermediate elements that violate this equivalence.

Unsafe operations - USE WITH CAUTION!

Sourceval unsafe_update : 'a pomap -> Store.Ix.t -> 'a node -> 'a pomap

unsafe_update pm ix node updates the node associated with node index ix in map pm with node. The Hasse-diagram associated with the partially ordered map pm may become inconsistent if the new node violates the partial order structure. This can lead to unpredictable results with other functions!

Sourceval unsafe_set_nodes : 'a pomap -> 'a node Store.t -> 'a pomap

unsafe_set_nodes pm s updates the node store associated with map pm with s. This assumes that s stores a consistent Hasse-diagram of nodes.

Sourceval unsafe_set_top : 'a pomap -> Store.Ix.Set.t -> 'a pomap

unsafe_set_top pm set updates the index of top nodes in map pm with set. This assumes that the nodes referenced by the node indices in set do not violate the properties of the Hasse-diagram of pm.

Sourceval unsafe_set_bot : 'a pomap -> Store.Ix.Set.t -> 'a pomap

unsafe_set_bot pm set updates the index of bottom nodes in map pm with set. This assumes that the nodes referenced by the node indices in set do not violate the properties of the Hasse-diagram of pm.

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