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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(*i $Id: goptions.mli 6304 2004-11-16 15:49:08Z sacerdot $ i*)
(* This module manages customization parameters at the vernacular level *)
(* Two kinds of things are managed : tables and options value
- Tables are created by applying the [MakeTable] functor.
- Variables storing options value are created by applying one of the
[declare_int_option], [declare_bool_option], ... functions.
Each table/option is uniquely identified by a key of type [option_name].
There are two kinds of table/option idenfiers: the primary ones
(supposed to be more global) and the secondary ones
The declaration of a table, say of name [SecondaryTable("Toto","Titi")]
automatically makes available the following vernacular commands:
Add Toto Titi foo.
Remove Toto Titi foo.
Print Toto Titi.
Test Toto Titi.
The declaration of a non boolean option value, say of name
[SecondaryTable("Tata","Tutu")], automatically makes available the
following vernacular commands:
Set Tata Tutu val.
Print Table Tata Tutu.
If it is the declaration of a boolean value, the following
vernacular commands are made available:
Set Tata Tutu.
Unset Tata Tutu.
Print Table Tata Tutu. (* synonym: Test Table Tata Tutu. *)
For a primary table, say of name [PrimaryTable("Bidule")], the
vernacular commands look like
Add Bidule foo.
Print Table Bidule foo.
Set Bidule foo.
...
The created table/option may be declared synchronous or not
(synchronous = consistent with the resetting commands) *)
(*i*)
open Pp
open Util
open Names
open Libnames
open Term
open Nametab
open Mod_subst
(*i*)
(*s Things common to tables and options. *)
(* The type of primary or secondary table/option keys *)
type option_name =
| PrimaryTable of string
| SecondaryTable of string * string
val error_undeclared_key : option_name -> 'a
(*s Tables. *)
(* The functor [MakeStringTable] declares a table containing objects
of type [string]; the function [member_message] say what to print
when invoking the "Test Toto Titi foo." command; at the end [title]
is the table name printed when invoking the "Print Toto Titi."
command; [active] is roughly the internal version of the vernacular
"Test ...": it tells if a given object is in the table; [elements]
returns the list of elements of the table *)
module MakeStringTable :
functor
(A : sig
val key : option_name
val title : string
val member_message : string -> bool -> std_ppcmds
val synchronous : bool
end) ->
sig
val active : string -> bool
val elements : unit -> string list
end
(* The functor [MakeRefTable] declares a new table of objects of type
[A.t] practically denoted by [reference]; the encoding function
[encode : reference -> A.t] is typically a globalization function,
possibly with some restriction checks; the function
[member_message] say what to print when invoking the "Test Toto
Titi foo." command; at the end [title] is the table name printed
when invoking the "Print Toto Titi." command; [active] is roughly
the internal version of the vernacular "Test ...": it tells if a
given object is in the table. *)
module MakeRefTable :
functor
(A : sig
type t
val encode : reference -> t
val subst : substitution -> t -> t
val printer : t -> std_ppcmds
val key : option_name
val title : string
val member_message : t -> bool -> std_ppcmds
val synchronous : bool
end) ->
sig
val active : A.t -> bool
val elements : unit -> A.t list
end
(*s Options. *)
(* These types and function are for declaring a new option of name [key]
and access functions [read] and [write]; the parameter [name] is the option name
used when printing the option value (command "Print Toto Titi." *)
type 'a option_sig = {
optsync : bool;
optname : string;
optkey : option_name;
optread : unit -> 'a;
optwrite : 'a -> unit
}
(* When an option is declared synchronous ([optsync] is [true]), the output is
a synchronous write function. Otherwise it is [optwrite] *)
type 'a write_function = 'a -> unit
val declare_int_option : int option option_sig -> int option write_function
val declare_bool_option : bool option_sig -> bool write_function
val declare_string_option: string option_sig -> string write_function
(*s Special functions supposed to be used only in vernacentries.ml *)
val get_string_table :
option_name ->
< add : string -> unit;
remove : string -> unit;
mem : string -> unit;
print : unit >
val get_ref_table :
option_name ->
< add : reference -> unit;
remove : reference -> unit;
mem : reference -> unit;
print : unit >
val set_int_option_value : option_name -> int option -> unit
val set_bool_option_value : option_name -> bool -> unit
val set_string_option_value : option_name -> string -> unit
val print_option_value : option_name -> unit
val print_tables : unit -> unit
|
