package term-indexing

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in-package search v0.2.0

term-indexing
- Term_indexing
  - Int_option
  - Intf
    
    Hashed
    
    Map
    
    Pattern
    
    Signature
    
    Subst
    
    Unification
    
    Term
    
    Term_core
    
    Term_index
  - Make
    
    Index
    
    P
    
    Path
    
    Pattern
    
    Subst
    
    Unification
    
    Term
  - Path
  - Pattern
    
    Make
    
    P
    
    T
    
    Make_raw
    
    P
    
    T
    
    Make_with_hash_consing
    
    P
    
    T
  - Subst
    
    Make
    
    M
    
    P
    
    T
    
    Unification
  - Term
    
    Default_map
    
    Make_hash_consed
    
    M
    
    P
  - Term_index
    
    IRef
    
    IS
    
    Make
    
    Internal_for_tests
    
    P
    
    S
    
    Unification
    
    T

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First-order terms.

include Intf.Term_core with type prim = P.t

type prim = P.t

The type of primitives, i.e. the symbols. Each value of type prim has a definite arity.

type t

The type of terms

type var := int

val pp_sexp : Format.formatter -> t -> unit

Pretty-printing of terms in s-exp format.

val prim : prim -> t array -> t

prim p ts constructs a term with head equal to p and subterms equal to ts

Raises Invalid_argument if the length of ts does not match the arity of p.

val var : var -> t

var v construcst a variable v

val destruct : (prim -> t array -> 'a) -> (var -> 'a) -> t -> 'a

destruct t ifprim ifvar performs case analysis on the term t

val is_var : t -> var option

is_var t is equal to var v if equal t (var v) or None if it is not the case

val fold : (t -> Path.t -> 'b -> 'b) -> 'b -> t -> 'b

fold f acc term folds f over the subterms of t

val get_subterm_fwd : t -> Path.forward -> t

get_subterm_fwd t fpth is the subterm of t at position defined by the forward path fpth.

Raises Get_subterm_oob if the path is out of bounds.

type 'a var_map

The type of polymorphic maps indexed by variables

include Intf.Hashed with type t := t

val compare : t -> t -> int

compare is a total order.

val equal : t -> t -> bool

equal s1 s2 tests whether s1 and s2 are equal.

val hash : t -> int

hash s is a hash of s.

val pp : Format.formatter -> t -> unit

pp fmt s prints a representation of s to the formatter fmt.

type var := int

val ub : t -> Int_option.t

ub t is an upper bound on the absolute value of variables contained in t. Equal to Int_option.none if t does not contain variables.

val map_variables : (int -> t) -> t -> t

map_variables f t replaces all variables var i present in t by f i.

val get_subterm : t -> Path.t -> t

get_subterm t pth is the subterm of t at position defined by the path pth.

Raise Get_subterm_oob if the path is out of bounds.

val subst : term:t -> path:Path.t -> (t -> t) -> t

subst ~term ~path f replaces the subterm of term at position path by f (get_subterm term path).

val fold_variables : (var -> Path.t -> 'b -> 'b) -> 'b -> t -> 'b

fold_variables f acc t folds f over the variables of t

val canon : t -> (unit -> var) -> var var_map * t

canon t gen canonicalizes the term t using the variable generator gen. Returns the canonicalized term as well as a map from old to canonicalized variables.

val uid : t -> int

uid t returns a unique integer attached to t. It is guaranteed that if two terms have the same uid, they are equal.