1 (**************************************************************************)
4 (* ||A|| A project by Andrea Asperti *)
6 (* ||I|| Developers: *)
7 (* ||T|| The HELM team. *)
8 (* ||A|| http://helm.cs.unibo.it *)
10 (* \ / This file is distributed under the terms of the *)
11 (* v GNU General Public License Version 2 *)
13 (**************************************************************************)
15 (* ********************************************************************** *)
18 (* Cosimo Oliboni, oliboni@cs.unibo.it *)
20 (* ********************************************************************** *)
22 include "compiler/environment.ma".
28 (* id: accesso all'ambiente con stringa *)
29 inductive ast_id (d:nat) (e:aux_env_type d) : bool → ast_type → Type ≝
30 AST_ID: ∀str:aux_str_type.
31 (* D *) (check_desc_env d e str) → (ast_id d e (get_const_desc (get_desc_env d e str)) (get_type_desc (get_desc_env d e str))).
33 (* -------------------------- *)
36 inductive ast_expr (d:nat) (e:aux_env_type d) : ast_type → Type ≝
37 AST_EXPR_BYTE8 : byte8 → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8)
38 | AST_EXPR_WORD16: word16 → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_WORD16)
39 | AST_EXPR_WORD32: word32 → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_WORD32)
41 | AST_EXPR_NEG: ∀t:ast_base_type.
42 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t)
43 | AST_EXPR_NOT: ∀t:ast_base_type.
44 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t)
45 | AST_EXPR_COM: ∀t:ast_base_type.
46 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t)
48 | AST_EXPR_ADD: ∀t:ast_base_type.
49 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t)
50 | AST_EXPR_SUB: ∀t:ast_base_type.
51 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t)
52 | AST_EXPR_MUL: ∀t:ast_base_type.
53 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t)
54 | AST_EXPR_DIV: ∀t:ast_base_type.
55 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t)
56 | AST_EXPR_SHR: ∀t:ast_base_type.
57 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8) → ast_expr d e (AST_TYPE_BASE t)
58 | AST_EXPR_SHL: ∀t:ast_base_type.
59 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8) → ast_expr d e (AST_TYPE_BASE t)
60 | AST_EXPR_AND: ∀t:ast_base_type.
61 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t)
62 | AST_EXPR_OR: ∀t:ast_base_type.
63 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t)
64 | AST_EXPR_XOR: ∀t:ast_base_type.
65 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t)
67 | AST_EXPR_GT : ∀t:ast_base_type.
68 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8)
69 | AST_EXPR_GTE: ∀t:ast_base_type.
70 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8)
71 | AST_EXPR_LT : ∀t:ast_base_type.
72 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8)
73 | AST_EXPR_LTE: ∀t:ast_base_type.
74 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8)
75 | AST_EXPR_EQ : ∀t:ast_base_type.
76 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8)
77 | AST_EXPR_NEQ: ∀t:ast_base_type.
78 ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE t) → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8)
80 | AST_EXPR_B8toW16 : ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8) → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_WORD16)
81 | AST_EXPR_B8toW32 : ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8) → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_WORD32)
82 | AST_EXPR_W16toB8 : ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_WORD16) → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8)
83 | AST_EXPR_W16toW32: ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_WORD16) → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_WORD32)
84 | AST_EXPR_W32toB8 : ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_WORD32) → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8)
85 | AST_EXPR_W32toW16: ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_WORD32) → ast_expr d e (AST_TYPE_BASE AST_BASE_TYPE_WORD16)
87 | AST_EXPR_ID: ∀b:bool.∀t:ast_type.
88 ast_var d e b t → ast_expr d e t
90 (* variabile: modificatori di array/struct dell'id *)
91 with ast_var : bool → ast_type → Type ≝
92 AST_VAR_ID: ∀b:bool.∀t:ast_type.
93 ast_id d e b t → ast_var d e b t
94 | AST_VAR_ARRAY: ∀b:bool.∀t:ast_type.∀n:nat.
95 ast_var d e b (AST_TYPE_ARRAY t n) → ast_base_expr d e → ast_var d e b t
96 | AST_VAR_STRUCT: ∀b:bool.∀nel:ne_list ast_type.∀n:nat.
97 ast_var d e b (AST_TYPE_STRUCT nel) → (* D *) (ltb n (len_neList ? nel) = true) → ast_var d e b (abs_nth_neList ? nel n)
99 (* espressioni generalizzate: anche non uniformi per tipo *)
100 with ast_base_expr : Type ≝
101 AST_BASE_EXPR: ∀t:ast_base_type.
102 ast_expr d e (AST_TYPE_BASE t) → ast_base_expr d e.
104 (* -------------------------- *)
106 let rec aux_ast_init_type (t:ast_type) on t : Type ≝
108 [ AST_TYPE_BASE bType ⇒ match bType with
109 [ AST_BASE_TYPE_BYTE8 ⇒ byte8
110 | AST_BASE_TYPE_WORD16 ⇒ word16
111 | AST_BASE_TYPE_WORD32 ⇒ word32
113 | AST_TYPE_ARRAY subType dim ⇒
114 let T ≝ aux_ast_init_type subType in
115 let rec aux (n:nat) on n ≝
118 | S n' ⇒ Prod T (aux n')
121 | AST_TYPE_STRUCT nelSubType ⇒
122 let rec aux (nel:ne_list ast_type) on nel ≝
124 [ ne_nil h ⇒ aux_ast_init_type h
125 | ne_cons h t ⇒ Prod (aux_ast_init_type h) (aux t)
131 inizializzatori: ammesse solo due forme, no ibridi
133 2) var = ... valori ...
135 inductive ast_init (d:nat) (e:aux_env_type d) : ast_type → Type ≝
136 AST_INIT_VAR: ∀b:bool.∀t:ast_type.
137 ast_var d e b t → ast_init d e t
138 | AST_INIT_VAL: ∀t:ast_type.
139 aux_ast_init_type t → ast_init d e t.
141 (* -------------------------- *)
143 (* statement: assegnamento/while/if else if else *)
144 inductive ast_stm : Πd:nat.aux_env_type d → Type ≝
145 AST_STM_ASG: ∀d.∀e:aux_env_type d.∀t:ast_type.
146 ast_var d e false t → ast_expr d e t → ast_stm d e
147 | AST_STM_WHILE: ∀d.∀e:aux_env_type d.
148 ast_base_expr d e → ast_decl (S d) (enter_env d e) → ast_stm d e
149 | AST_STM_IF: ∀d.∀e:aux_env_type d.
150 ne_list (Prod (ast_base_expr d e) (ast_decl (S d) (enter_env d e))) → option (ast_decl (S d) (enter_env d e)) → ast_stm d e
153 with ast_decl : Πd:nat.aux_env_type d → Type ≝
154 AST_NO_DECL: ∀d.∀e:aux_env_type d.
155 list (ast_stm d e) → ast_decl d e
156 | AST_CONST_DECL: ∀d.∀e:aux_env_type d.∀str:aux_str_type.∀t:ast_type.
157 (* D *) (check_not_already_def_env d e str) → ast_init d e t → ast_decl d (add_desc_env d e str true t) → ast_decl d e
158 | AST_VAR_DECL: ∀d.∀e:aux_env_type d.∀str:aux_str_type.∀t:ast_type.
159 (* D *) (check_not_already_def_env d e str) → option (ast_init d e t) → ast_decl d (add_desc_env d e str false t) → ast_decl d e.
161 (* -------------------------- *)
164 inductive ast_root : Type ≝
165 AST_ROOT: ast_decl O empty_env → ast_root.
167 (* -------------------------- *)
169 (* programma vuoto *)
170 definition empty_ast_prog ≝ AST_ROOT (AST_NO_DECL O empty_env (nil ?)).