logtk

Core types and algorithms for logic
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Library logtk
Module Logtk . TypeInference . Ctx
type t
val create : ?def_as_rewrite:bool -> ?default:type_ -> ?on_var:[ `Default | `Infer ] -> ?on_undef:[ `Warn | `Fail | `Guess ] -> ?on_shadow:[ `Warn | `Ignore ] -> implicit_ty_args:bool -> unit -> t

New context with a signature and default types.

  • parameter default

    which types are inferred by default (if not provided then type_erm will be used)

  • parameter def_as_rewrite

    if true, definitions will be treated like rewrite rules

  • parameter on_undef

    behavior when an undefined identifier is met

  • parameter is_tptp

    if true, interpret some constants as in TPTP

  • parameter on_var

    behavior when a variable without type annotation is met

val copy : t -> t

Copy of the context

val exit_scope : t -> unit

Exit the current scope (formula, clause), meaning that all free variables' types are forgotten. Some free variables are bound to the default type provided at creation of the context. Some ree variables will be generalized, i.e., kept as (free) variables

val declare : ?loc:loc -> t -> ID.t -> type_ -> unit

Declare the type of a symbol, possibly shadowing a previous version

val with_var : t -> type_ Var.t -> f:( unit -> 'a ) -> 'a

Execute a function f with an additional declared variable

val with_vars : t -> type_ Var.t list -> f:( unit -> 'a ) -> 'a

Execute a function f with additional declared variables

val pop_new_types : t -> (ID.t * type_) list

Obtain the list of symbols whose type has been inferred recently, and reset it.