ast.ml 1.59 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
(*  Abstract syntax as produced by the parsed *)

open Location

type pprog = pmodule_item list

and pmodule_item = pmodule_item' located
and pmodule_item' =
  | TypeDecl of string * ppat
  | PatDecl of string * ppat
  | FunDecl of abstr
  | LetDecl of ppat * pexpr
  | EvalStatement of pexpr
  | Debug of string * ([`Pat of ppat | `Expr of pexpr] list)

and pexpr = pexpr' located
and pexpr' = 
18
19
  (* For debugging the typer: an expression with prescribed type *)
  | DebugTyper of ppat
20
21
22
23
24
25
26
27
28
29
30
31
    
  (* CDuce is a Lambda-calculus ... *)
  | Var of string
  | Apply of pexpr * pexpr
  | Abstraction of abstr
      
  (* Data constructors *)
  | Cst of Types.const
  | Pair of pexpr * pexpr
  | RecordLitt of (Types.label * pexpr) list
      
  (* Data destructors *)
32
  | Op of string * pexpr list
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
  | Match of pexpr * branches
  | Map of pexpr * branches

and abstr = { 
  fun_name : string option; 
  fun_iface : (ppat * ppat) list;
  fun_body : branches
}

and branches = (ppat * pexpr) list
    
(* A common syntactic class for patterns and types *) 

and ppat = ppat' located
and ppat' =
  | PatVar of string
  | Recurs of ppat * (string * ppat) list
  | Internal of Types.descr
  | Or of ppat * ppat
  | And of ppat * ppat
  | Diff of ppat * ppat
  | Prod of ppat * ppat
  | Arrow of ppat * ppat
  | Record of Types.label * bool * ppat
  | Capture of Patterns.capture
  | Constant of Patterns.capture * Types.const
  | Regexp of regexp * ppat

and regexp =
  | Epsilon
  | Elem of ppat
  | Seq of regexp * regexp
  | Alt of regexp * regexp
  | Star of regexp
  | WeakStar of regexp
  | SeqCapture of Patterns.capture * regexp