package coq

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package coq
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This module registers the declaration of global tables, which will be kept in synchronization during the various backtracks of the system.

type 'a summary_declaration = {
  1. freeze_function : marshallable:bool -> 'a;
    (*

    freeze_function true is for marshalling to disk. * e.g. lazy must be forced

    *)
  2. unfreeze_function : 'a -> unit;
  3. init_function : unit -> unit;
}

Types of global Coq states. The 'a type should be pure and marshallable by the standard OCaml marshalling function.

For tables registered during the launch of coqtop, the init_function will be run only once, during an init_summaries done at the end of coqtop initialization. For tables registered later (for instance during a plugin dynlink), init_function is used when unfreezing an earlier frozen state that doesn't contain any value for this table.

Beware: for tables registered dynamically after the initialization of Coq, their init functions may not be run immediately. It is hence the responsibility of plugins to initialize themselves properly.

val declare_summary : string -> 'a summary_declaration -> unit
module Dyn : Dyn.S

We provide safe projection from the summary to the types stored in it.

val declare_summary_tag : string -> 'a summary_declaration -> 'a Dyn.tag

All-in-one reference declaration + summary registration. It behaves just as OCaml's standard ref function, except that a declare_summary is done, with name as string. The init_function restores the reference to its initial value. The freeze_function can be overridden

val ref : ?freeze:(marshallable:bool -> 'a -> 'a) -> name:string -> 'a -> 'a Stdlib.ref
val ref_tag : ?freeze:(marshallable:bool -> 'a -> 'a) -> name:string -> 'a -> 'a Stdlib.ref * 'a Dyn.tag
module Local : sig ... end
val declare_ml_modules_summary : (string * string option) list summary_declaration -> unit

Special summary for ML modules. This summary entry is special because its unfreeze may load ML code and hence add summary entries. Thus is has to be recognizable, and handled properly.

For global tables registered statically before the end of coqtop launch, the following empty init_function could be used.

val nop : unit -> unit

The type frozen is a snapshot of the states of all the registered tables of the system.

type frozen
val empty_frozen : frozen
val freeze_summaries : marshallable:bool -> frozen
val unfreeze_summaries : ?partial:bool -> frozen -> unit
val init_summaries : unit -> unit

Typed projection of the summary. Experimental API, use with CARE

val modify_summary : frozen -> 'a Dyn.tag -> 'a -> frozen
val project_from_summary : frozen -> 'a Dyn.tag -> 'a
val remove_from_summary : frozen -> 'a Dyn.tag -> frozen
val dump : unit -> (int * string) list

Debug

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