(* Title: Pure/attribute.ML
ID: $Id$
Author: Markus Wenzel, TU Muenchen
Theorem tags and attributes.
*)
signature BASIC_ATTRIBUTE =
sig
type tag
type tthm
type 'a attribute
val print_attributes: theory -> unit
end;
signature ATTRIBUTE =
sig
include BASIC_ATTRIBUTE
val thm_of: tthm -> thm
val tthm_of: thm -> tthm
val none: 'a -> 'a * 'b attribute list
val no_attrs: 'a * 'b -> ('a * ('b * tag list)) * 'c attribute list
val no_attrss: 'a * 'b list -> ('a * ('b * tag list) list) * 'c attribute list
val fail: string -> string -> 'a
val apply: ('a * tthm) * 'a attribute list -> ('a * tthm)
val applys: ('a * tthm list) * 'a attribute list -> ('a * tthm list)
val pretty_tthm: tthm -> Pretty.T
val tag: tag -> 'a attribute
val untag: tag -> 'a attribute
val lemma: tag
val assumption: tag
val tag_lemma: 'a attribute
val tag_assumption: 'a attribute
val setup: theory -> theory
val global_attr: theory -> (xstring * string list) -> theory attribute
val local_attr: theory -> (xstring * string list) -> local_theory attribute
val add_attrs: (bstring * ((string list -> theory attribute) *
(string list -> local_theory attribute))) list -> theory -> theory
end;
structure Attribute: ATTRIBUTE =
struct
(** tags and attributes **)
type tag = string * string list;
type tthm = thm * tag list;
type 'a attribute = 'a * tthm -> 'a * tthm;
fun thm_of (thm, _) = thm;
fun tthm_of thm = (thm, []);
fun none x = (x, []);
fun no_attrs (x, y) = ((x, (y, [])), []);
fun no_attrss (x, ys) = ((x, map (rpair []) ys), []);
(* apply attributes *)
exception FAIL of string * string;
fun fail name msg = raise FAIL (name, msg);
fun warn_failed (name, msg) =
warning ("Failed invocation of " ^ quote name ^ " attribute: " ^ msg);
fun apply (x_th, []) = x_th
| apply (x_th, f :: fs) = apply (f x_th handle FAIL info => (warn_failed info; x_th), fs);
fun applys ((x, []), _) = (x, [])
| applys ((x, th :: ths), atts) =
let
val (x', th') = apply ((x, th), atts);
val (x'', ths') = applys ((x', ths), atts);
in (x'', th' :: ths') end;
(* display tagged theorems *)
fun pretty_tag (name, []) = Pretty.str name
| pretty_tag (name, args) = Pretty.block
[Pretty.str name, Pretty.list "(" ")" (map Pretty.str args)];
val pretty_tags = Pretty.list "[" "]" o map pretty_tag;
fun pretty_tthm (thm, []) = Pretty.quote (Display.pretty_thm thm)
| pretty_tthm (thm, tags) = Pretty.block
[Pretty.quote (Display.pretty_thm thm), Pretty.brk 1, pretty_tags tags];
(* basic attributes *)
fun tag tg (x, (thm, tags)) = (x, (thm, tg ins tags));
fun untag tg (x, (thm, tags)) = (x, (thm, tags \ tg));
val lemma = ("lemma", []);
val assumption = ("assumption", []);
fun tag_lemma x = tag lemma x;
fun tag_assumption x = tag assumption x;
(** theory data **)
(* data kind 'attributes' *)
val attributesK = "Pure/attributes";
exception Attributes of
{space: NameSpace.T,
attrs:
((string list -> theory attribute) *
(string list -> local_theory attribute)) Symtab.table};
fun print_attributes thy = Display.print_data thy attributesK;
(* setup *)
local
val empty = Attributes {space = NameSpace.empty, attrs = Symtab.empty};
fun prep_ext (x as Attributes _) = x;
fun merge (Attributes {space = space1, attrs = attrs1},
Attributes {space = space2, attrs = attrs2}) =
Attributes {
space = NameSpace.merge (space1, space2),
attrs = Symtab.merge (K true) (attrs1, attrs2)};
fun print _ (Attributes {space, attrs}) =
(Pretty.writeln (Display.pretty_name_space ("attribute name space", space));
Pretty.writeln (Pretty.strs ("attributes:" :: map fst (Symtab.dest attrs))));
in
val setup = Theory.init_data [(attributesK, (empty, prep_ext, merge, print))];
end;
(* get data record *)
fun get_attributes_sg sg =
(case Sign.get_data sg attributesK of
Attributes x => x
| _ => type_error attributesK);
val get_attributes = get_attributes_sg o Theory.sign_of;
(* get global / local attributes *)
fun gen_attr which thy =
let
val {space, attrs} = get_attributes thy;
val intern = NameSpace.intern space;
fun attr (raw_name, args) x_th =
(case Symtab.lookup (attrs, intern raw_name) of
None => raise FAIL (intern raw_name, "unknown attribute")
| Some p => which p args x_th);
in attr end;
val global_attr = gen_attr fst;
val local_attr = gen_attr snd;
(* add_attrs *)
fun add_attrs raw_attrs thy =
let
val full = Sign.full_name (Theory.sign_of thy);
val new_attrs = map (apfst full) raw_attrs;
val {space, attrs} = get_attributes thy;
val space' = NameSpace.extend (space, map fst new_attrs);
val attrs' = Symtab.extend (attrs, new_attrs)
handle Symtab.DUPS dups =>
error ("Duplicate declaration of attributes(s) " ^ commas_quote dups);
in
Theory.put_data (attributesK, Attributes {space = space', attrs = attrs'}) thy
end;
end;
structure BasicAttribute: BASIC_ATTRIBUTE = Attribute;
open BasicAttribute;