author | wenzelm |
Wed, 10 Jun 2009 11:12:40 +0200 | |
changeset 31543 | 5bef6c7cc819 |
parent 30523 | 4007ea1ddac2 |
child 37535 | 75de61a479e3 |
permissions | -rw-r--r-- |
24582 | 1 |
(* Title: Pure/ML/ml_syntax.ML |
24574 | 2 |
Author: Makarius |
3 |
||
4 |
Basic ML syntax operations. |
|
5 |
*) |
|
6 |
||
7 |
signature ML_SYNTAX = |
|
8 |
sig |
|
9 |
val reserved_names: string list |
|
10 |
val reserved: Name.context |
|
11 |
val is_reserved: string -> bool |
|
12 |
val is_identifier: string -> bool |
|
13 |
val atomic: string -> string |
|
14 |
val print_int: int -> string |
|
15 |
val print_pair: ('a -> string) -> ('b -> string) -> 'a * 'b -> string |
|
16 |
val print_list: ('a -> string) -> 'a list -> string |
|
17 |
val print_option: ('a -> string) -> 'a option -> string |
|
18 |
val print_char: string -> string |
|
19 |
val print_string: string -> string |
|
20 |
val print_strings: string list -> string |
|
30230 | 21 |
val print_properties: Properties.T -> string |
22 |
val print_position: Position.T -> string |
|
30523 | 23 |
val make_binding: string * Position.T -> string |
24574 | 24 |
val print_indexname: indexname -> string |
25 |
val print_class: class -> string |
|
26 |
val print_sort: sort -> string |
|
27 |
val print_typ: typ -> string |
|
28 |
val print_term: term -> string |
|
29 |
end; |
|
30 |
||
31 |
structure ML_Syntax: ML_SYNTAX = |
|
32 |
struct |
|
33 |
||
34 |
(* reserved words *) |
|
35 |
||
24582 | 36 |
val reserved_names = filter Syntax.is_ascii_identifier ML_Lex.keywords; |
24574 | 37 |
val reserved = Name.make_context reserved_names; |
38 |
val is_reserved = Name.is_declared reserved; |
|
39 |
||
40 |
||
41 |
(* identifiers *) |
|
42 |
||
43 |
fun is_identifier name = |
|
44 |
not (is_reserved name) andalso Syntax.is_ascii_identifier name; |
|
45 |
||
46 |
||
47 |
(* literal output -- unformatted *) |
|
48 |
||
49 |
val atomic = enclose "(" ")"; |
|
50 |
||
51 |
val print_int = Int.toString; |
|
52 |
||
53 |
fun print_pair f1 f2 (x, y) = "(" ^ f1 x ^ ", " ^ f2 y ^ ")"; |
|
54 |
||
55 |
fun print_list f = enclose "[" "]" o commas o map f; |
|
56 |
||
57 |
fun print_option f NONE = "NONE" |
|
58 |
| print_option f (SOME x) = "SOME (" ^ f x ^ ")"; |
|
59 |
||
60 |
fun print_char s = |
|
31543
5bef6c7cc819
allow Isabelle symbols within low-level ML source;
wenzelm
parents:
30523
diff
changeset
|
61 |
if not (Symbol.is_char s) then s |
24574 | 62 |
else if s = "\"" then "\\\"" |
63 |
else if s = "\\" then "\\\\" |
|
64 |
else |
|
65 |
let val c = ord s in |
|
66 |
if c < 32 then "\\^" ^ chr (c + ord "@") |
|
67 |
else if c < 127 then s |
|
68 |
else "\\" ^ string_of_int c |
|
69 |
end; |
|
70 |
||
31543
5bef6c7cc819
allow Isabelle symbols within low-level ML source;
wenzelm
parents:
30523
diff
changeset
|
71 |
val print_string = quote o implode o map print_char o Symbol.explode; |
24574 | 72 |
val print_strings = print_list print_string; |
73 |
||
30230 | 74 |
val print_properties = print_list (print_pair print_string print_string); |
75 |
fun print_position pos = "Position.of_properties " ^ print_properties (Position.properties_of pos); |
|
30523 | 76 |
fun make_binding (name, pos) = "Binding.make " ^ print_pair print_string print_position (name, pos); |
30230 | 77 |
|
24574 | 78 |
val print_indexname = print_pair print_string print_int; |
79 |
||
80 |
val print_class = print_string; |
|
81 |
val print_sort = print_list print_class; |
|
82 |
||
83 |
fun print_typ (Type arg) = "Type " ^ print_pair print_string (print_list print_typ) arg |
|
84 |
| print_typ (TFree arg) = "TFree " ^ print_pair print_string print_sort arg |
|
85 |
| print_typ (TVar arg) = "TVar " ^ print_pair print_indexname print_sort arg; |
|
86 |
||
87 |
fun print_term (Const arg) = "Const " ^ print_pair print_string print_typ arg |
|
88 |
| print_term (Free arg) = "Free " ^ print_pair print_string print_typ arg |
|
89 |
| print_term (Var arg) = "Var " ^ print_pair print_indexname print_typ arg |
|
90 |
| print_term (Bound i) = "Bound " ^ print_int i |
|
91 |
| print_term (Abs (s, T, t)) = |
|
92 |
"Abs (" ^ print_string s ^ ", " ^ print_typ T ^ ", " ^ print_term t ^ ")" |
|
93 |
| print_term (t1 $ t2) = atomic (print_term t1) ^ " $ " ^ atomic (print_term t2); |
|
94 |
||
95 |
end; |