dedukti 2.7 · OCaml Package

Global Environment

val d_module : Basic.Debug.flag

type file = string

type signature_error =

| UnmarshalBadVersionNumber of Basic.loc * file
| UnmarshalSysError of Basic.loc * file * string
| UnmarshalUnknown of Basic.loc * file
| SymbolNotFound of Basic.loc * Basic.name
| AlreadyDefinedSymbol of Basic.loc * Basic.name
| CannotMakeRuleInfos of Rule.rule_error
| CannotBuildDtree of Dtree.dtree_error
| CannotAddRewriteRules of Basic.loc * Basic.name
| ConfluenceErrorImport of Basic.loc * Basic.mident * Confluence.confluence_error
| ConfluenceErrorRules of Basic.loc * Rule.rule_infos list * Confluence.confluence_error
| GuardNotSatisfied of Basic.loc * Term.term * Term.term
| CannotExportModule of Basic.mident * exn
| PrivateSymbol of Basic.loc * Basic.name
| ExpectedACUSymbol of Basic.loc * Basic.name

exception Signature_error of signature_error

Wrapper exception for errors occuring while handling a signature.

type staticity =

| Static
| Definable of Term.algebra
| Injective
(*
Is the symbol allowed to have rewrite rules or not ? And if it has, can it be considered injective by the type-checker ?
*)

type scope =

| Public
| Private
(*
Should the symbol be accessible from outside its definition file ?
*)

type t

A collection of well-typed symbols and rewrite rules.

val make : Basic.mident -> (Basic.loc -> Basic.mident -> file) -> t

make file creates a new signature corresponding to the file file.

val get_name : t -> Basic.mident

get_name sg returns the name of the signature sg.

val export : t -> out_channel -> unit

export sg oc saves the current environment in oc file.

val get_id_comparator : t -> Basic.name Term.comparator

val import_signature : t -> t -> unit

import sg sg_ext imports the signature sg_ext into the signature sg.

val is_static : t -> Basic.loc -> Basic.name -> bool

is_static sg l cst is true when cst is a static symbol.

val is_injective : t -> Basic.loc -> Basic.name -> bool

is_injective sg l cst is true when cst is either static or declared as injective.

val get_type : t -> Basic.loc -> Basic.name -> Term.term

get_type sg l md id returns the type of the constant md.id inside the environement sg.

val get_staticity : t -> Basic.loc -> Basic.name -> staticity

get_staticity sg l md id returns the staticity of the symbol md.id

val get_algebra : t -> Basic.loc -> Basic.name -> Term.algebra

get_algebra sg l md id returns the algebra of the symbol md.id.

val get_neutral : t -> Basic.loc -> Basic.name -> Term.term

get_neutral sg l md id returns the neutral element of the ACU symbol md.id.

val is_AC : t -> Basic.loc -> Basic.name -> bool

is_AC sg l na returns true when na is declared as AC symbol

val import : t -> Basic.loc -> Basic.mident -> unit

import sg md the module md in the signature sg.

val get_dtree : t -> Basic.loc -> Basic.name -> Dtree.t

get_dtree sg filter l cst returns the decision/matching tree associated with cst inside the environment sg.

val get_rules : t -> Basic.loc -> Basic.name -> Rule.rule_infos list

get_rules sg lc cst returns a list of rules that defines the symbol.

val add_external_declaration : 
  t ->
  Basic.loc ->
  Basic.name ->
  scope ->
  staticity ->
  Term.term ->
  unit

add_external_declaration sg l cst sc st ty declares the symbol id of type ty, scope sc and staticity st in the environment sg.

val add_declaration : 
  t ->
  Basic.loc ->
  Basic.ident ->
  scope ->
  staticity ->
  Term.term ->
  unit

add_declaration sg l id sc st ty declares the symbol id of type ty and staticity st in the environment sg. If sc is Private then the symbol cannot be used in other modules

val add_rules : t -> Rule.rule_infos list -> unit

add_rules sg rule_lst adds a list of rule to a symbol in the environement sg. All rules must be on the same symbol.

type rw_infos = {

stat : staticity;
(*
Whether a symbol is definable
*)
ty : Term.term;
(*
The type of a symbol
*)
scope : scope;
(*
The scope of the symbol (Public/Private)
*)
rules : Rule.rule_infos list;
(*
The stack pile of rules associated to a symbol. They are imported in the signature in the order by they are declared within the file
*)
decision_tree : Dtree.t option;
(*
The decision tree computed for the set of rules declared above
*)

}

val get_rw_infos : t -> Basic.mident -> Basic.ident -> rw_infos option

val fold_symbols : 
  (Basic.mident -> Basic.ident -> rw_infos -> 'a -> 'a) ->
  t ->
  'a ->
  'a

fold_symbols f sg t folds the function f on all symbol_infos in the signature starting from t.

val iter_symbols : 
  (Basic.mident -> Basic.ident -> rw_infos -> unit) ->
  t ->
  unit

iter_symbols f sg iters the function f on all symbol_infos in the signature.

package dedukti