author | wenzelm |
Thu, 22 Jan 2009 11:23:15 +0100 | |
changeset 29617 | b36bcbc1be3a |
parent 29581 | b3b33e0298eb |
child 30214 | f84c9f10292a |
child 30240 | 5b25fee0362c |
permissions | -rw-r--r-- |
28941 | 1 |
(* Title: Pure/General/binding.ML |
2 |
Author: Florian Haftmann, TU Muenchen |
|
3 |
||
4 |
Structured name bindings. |
|
5 |
*) |
|
6 |
||
7 |
signature BASIC_BINDING = |
|
8 |
sig |
|
29581 | 9 |
type binding |
28941 | 10 |
val long_names: bool ref |
11 |
val short_names: bool ref |
|
12 |
val unique_names: bool ref |
|
13 |
end; |
|
14 |
||
15 |
signature BINDING = |
|
16 |
sig |
|
17 |
include BASIC_BINDING |
|
29617 | 18 |
val name_pos: string * Position.T -> binding |
19 |
val name: string -> binding |
|
20 |
val empty: binding |
|
21 |
val map_base: (string -> string) -> binding -> binding |
|
22 |
val qualify: string -> binding -> binding |
|
23 |
val add_prefix: bool -> string -> binding -> binding |
|
24 |
val map_prefix: ((string * bool) list -> binding -> binding) -> binding -> binding |
|
25 |
val is_empty: binding -> bool |
|
26 |
val base_name: binding -> string |
|
27 |
val pos_of: binding -> Position.T |
|
28 |
val dest: binding -> (string * bool) list * string |
|
29338 | 29 |
val separator: string |
30 |
val is_qualified: string -> bool |
|
29617 | 31 |
val display: binding -> string |
32 |
end; |
|
28941 | 33 |
|
34 |
structure Binding : BINDING = |
|
35 |
struct |
|
36 |
||
37 |
(** global flags **) |
|
38 |
||
39 |
val long_names = ref false; |
|
40 |
val short_names = ref false; |
|
41 |
val unique_names = ref true; |
|
42 |
||
43 |
||
29338 | 44 |
(** qualification **) |
45 |
||
46 |
val separator = "."; |
|
47 |
val is_qualified = exists_string (fn s => s = separator); |
|
48 |
||
49 |
fun reject_qualified kind s = |
|
50 |
if is_qualified s then |
|
51 |
error ("Attempt to declare qualified " ^ kind ^ " " ^ quote s) |
|
52 |
else s; |
|
53 |
||
54 |
||
28941 | 55 |
(** binding representation **) |
56 |
||
29617 | 57 |
datatype binding = Binding of ((string * bool) list * string) * Position.T; |
28941 | 58 |
(* (prefix components (with mandatory flag), base name, position) *) |
59 |
||
28965 | 60 |
fun name_pos (name, pos) = Binding (([], name), pos); |
61 |
fun name name = name_pos (name, Position.none); |
|
62 |
val empty = name ""; |
|
28941 | 63 |
|
64 |
fun map_binding f (Binding (prefix_name, pos)) = Binding (f prefix_name, pos); |
|
65 |
||
28965 | 66 |
val map_base = map_binding o apsnd; |
67 |
||
68 |
fun qualify_base path name = |
|
69 |
if path = "" orelse name = "" then name |
|
29338 | 70 |
else path ^ separator ^ name; |
28965 | 71 |
|
72 |
val qualify = map_base o qualify_base; |
|
29006 | 73 |
(*FIXME should all operations on bare names move here from name_space.ML ?*) |
28941 | 74 |
|
29208
b0c81b9a0133
Use prefix component of bindings for locale prefixes.
ballarin
parents:
29006
diff
changeset
|
75 |
fun add_prefix sticky "" b = b |
29338 | 76 |
| add_prefix sticky prfx b = (map_binding o apfst) |
77 |
(cons ((*reject_qualified "prefix"*) prfx, sticky)) b; |
|
28941 | 78 |
|
79 |
fun map_prefix f (Binding ((prefix, name), pos)) = |
|
28965 | 80 |
f prefix (name_pos (name, pos)); |
81 |
||
82 |
fun is_empty (Binding ((_, name), _)) = name = ""; |
|
29006 | 83 |
fun base_name (Binding ((_, name), _)) = name; |
28965 | 84 |
fun pos_of (Binding (_, pos)) = pos; |
85 |
fun dest (Binding (prefix_name, _)) = prefix_name; |
|
28941 | 86 |
|
87 |
fun display (Binding ((prefix, name), _)) = |
|
88 |
let |
|
89 |
fun mk_prefix (prfx, true) = prfx |
|
90 |
| mk_prefix (prfx, false) = enclose "(" ")" prfx |
|
91 |
in if not (! long_names) orelse null prefix orelse name = "" then name |
|
92 |
else space_implode "." (map mk_prefix prefix) ^ ":" ^ name |
|
93 |
end; |
|
94 |
||
95 |
end; |
|
96 |
||
97 |
structure Basic_Binding : BASIC_BINDING = Binding; |
|
98 |
open Basic_Binding; |