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|
(***********************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA-Rocquencourt & LRI-CNRS-Orsay *)
(* \VV/ *************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(***********************************************************************)
(*i $Id$ i*)
(*i*)
open Util
open Names
open Libnames
open Libobject
open Summary
(*i*)
(*s This module provides a general mechanism to keep a trace of all operations
and to backtrack (undo) those operations. It provides also the section
mechanism (at a low level; discharge is not known at this step). *)
type node =
| Leaf of obj
| CompilingLibrary of object_prefix
| OpenedModule of object_prefix * Summary.frozen
| OpenedModtype of object_prefix * Summary.frozen
| OpenedSection of object_prefix * Summary.frozen
| ClosedSection of bool * dir_path * library_segment
| FrozenState of Summary.frozen
and library_segment = (object_name * node) list
type lib_objects = (identifier * obj) list
(*s Object iteratation functions. *)
val open_objects : int -> object_prefix -> lib_objects -> unit
val load_objects : int -> object_prefix -> lib_objects -> unit
val subst_objects : object_prefix -> substitution -> lib_objects -> lib_objects
(* [classify_segment seg] verifies that there are no OpenedThings,
clears ClosedSections and FrozenStates and divides Leafs according
to their answers to the [classify_object] function in three groups:
[Substitute], [Keep], [Anticipate] respectively. The order of each
returned list is the same as in the input list. *)
val classify_segment :
library_segment -> lib_objects * lib_objects * obj list
(* [segment_of_objects prefix objs] forms a list of Leafs *)
val segment_of_objects :
object_prefix -> lib_objects -> library_segment
(*s Adding operations (which call the [cache] method, and getting the
current list of operations (most recent ones coming first). *)
val add_leaf : identifier -> obj -> object_name
val add_absolutely_named_leaf : object_name -> obj -> unit
val add_anonymous_leaf : obj -> unit
(* this operation adds all objects with the same name and calls load_object
for each of them *)
val add_leaves : identifier -> obj list -> object_name
val add_frozen_state : unit -> unit
val mark_end_of_command : unit -> unit
(*s The function [contents_after] returns the current library segment,
starting from a given section path. If not given, the entire segment
is returned. *)
val contents_after : object_name option -> library_segment
(*s Functions relative to current path *)
(* User-side names *)
val cwd : unit -> dir_path
val make_path : identifier -> section_path
(* Kernel-side names *)
val current_prefix : unit -> module_path * dir_path
val make_kn : identifier -> kernel_name
(* Are we inside an opened section *)
val sections_are_opened : unit -> bool
val sections_depth : unit -> int
(* Are we inside an opened module type *)
val is_modtype : unit -> bool
val is_module : unit -> bool
(* Returns the most recent OpenedThing node *)
val what_is_opened : unit -> object_name * node
(*s Modules and module types *)
val start_module :
module_ident -> module_path -> Summary.frozen -> object_prefix
val end_module : module_ident
-> object_name * object_prefix * Summary.frozen * library_segment
val start_modtype :
module_ident -> module_path -> Summary.frozen -> object_prefix
val end_modtype : module_ident
-> object_name * object_prefix * Summary.frozen * library_segment
(* Lib.add_frozen_state must be called after each of the above functions *)
(*s Compilation units *)
val start_compilation : dir_path -> module_path -> unit
val end_compilation : dir_path -> object_prefix * library_segment
(* The function [library_dp] returns the [dir_path] of the current
compiling library (or [default_library]) *)
val library_dp : unit -> dir_path
(* Extract the library part of a name even if in a section *)
val library_part : global_reference -> dir_path
(*s Sections *)
val open_section : identifier -> object_prefix
val close_section : export:bool -> identifier ->
object_prefix * library_segment * Summary.frozen
(*s Backtracking (undo). *)
val reset_to : object_name -> unit
val reset_name : identifier located -> unit
val reset_mod : identifier located -> unit
(* [back n] resets to the place corresponding to the $n$-th call of
[mark_end_of_command] (counting backwards) *)
val back : int -> unit
(*s We can get and set the state of the operations (used in [States]). *)
type frozen
val freeze : unit -> frozen
val unfreeze : frozen -> unit
val init : unit -> unit
val declare_initial_state : unit -> unit
val reset_initial : unit -> unit
|
