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|
open Ast
open Lexing
(* Locations *)
let string_of_position p =
Printf.sprintf "%s:%i:%i" p.pos_fname p.pos_lnum (p.pos_cnum - p.pos_bol)
let string_of_extent (p,q) =
if p.pos_fname = q.pos_fname then
if p.pos_lnum = q.pos_lnum then
if p.pos_cnum = q.pos_cnum then
Printf.sprintf "%s:%i.%i" p.pos_fname p.pos_lnum (p.pos_cnum - p.pos_bol)
else
Printf.sprintf "%s:%i.%i-%i" p.pos_fname p.pos_lnum (p.pos_cnum - p.pos_bol) (q.pos_cnum - q.pos_bol)
else
Printf.sprintf "%s:%i.%i-%i.%i" p.pos_fname p.pos_lnum (p.pos_cnum - p.pos_bol) q.pos_lnum (q.pos_cnum - q.pos_bol)
else
Printf.sprintf "%s:%i.%i-%s:%i.%i" p.pos_fname p.pos_lnum (p.pos_cnum - p.pos_bol) q.pos_fname q.pos_lnum (q.pos_cnum - q.pos_bol)
(* Operators *)
let string_of_unary_op = function
| AST_UPLUS -> "+"
| AST_UMINUS -> "-"
let string_of_binary_op = function
| AST_MUL -> "*"
| AST_DIV -> "/"
| AST_MOD -> "mod"
| AST_PLUS -> "+"
| AST_MINUS -> "-"
let string_of_binary_rel = function
| AST_EQ -> "="
| AST_NE -> "<>"
| AST_LT -> "<"
| AST_LE -> "<="
| AST_GT -> ">"
| AST_GE -> ">="
let string_of_binary_bool = function
| AST_AND -> "and"
| AST_OR -> "or"
let binary_op_precedence = function
| AST_MUL| AST_DIV| AST_MOD-> 51
| AST_PLUS | AST_MINUS -> 50
let binary_rel_precedence = function
| AST_EQ | AST_NE -> 41
| AST_LT | AST_LE | AST_GT | AST_GE -> 40
let binary_bool_precedence = function
| AST_AND -> 31
| AST_OR -> 30
let arrow_precedence = 20
let if_precedence = 10
let expr_precedence = function
| AST_unary (_, _) | AST_pre(_, _) | AST_not(_) -> 99
| AST_binary(op, _, _) -> binary_op_precedence op
| AST_binary_rel(r, _, _) -> binary_rel_precedence r
| AST_binary_bool(r, _, _) -> binary_bool_precedence r
| AST_arrow(_, _) -> arrow_precedence
| AST_if(_, _, _) -> if_precedence
| _ -> 100
(* utility *)
let print_list f sep fmt l =
let rec aux = function
| [] -> ()
| [a] -> f fmt a
| a::b -> f fmt a; Format.pp_print_string fmt sep; aux b
in
aux l
let print_id_ext fmt (i, _) =
Format.pp_print_string fmt i
(* types *)
let rec string_of_typ = function
| AST_TINT -> "int"
| AST_TBOOL -> "bool"
| AST_TREAL -> "real"
(* expressions *)
let print_id fmt v =
Format.pp_print_string fmt v
let rec print_expr fmt e =
match e with
| AST_unary (op,(e1,_)) ->
Format.pp_print_string fmt (string_of_unary_op op);
if expr_precedence e1 <= expr_precedence e
then Format.fprintf fmt "(%a)" print_expr e1
else Format.fprintf fmt "%a" print_expr e1
| AST_not (e1,_) ->
Format.pp_print_string fmt "not ";
if expr_precedence e1 <= expr_precedence e
then Format.fprintf fmt "(%a)" print_expr e1
else Format.fprintf fmt "%a" print_expr e1
| AST_pre ((e1,_), _) ->
Format.pp_print_string fmt "pre ";
if expr_precedence e1 <= expr_precedence e
then Format.fprintf fmt "(%a)" print_expr e1
else Format.fprintf fmt "%a" print_expr e1
| AST_binary (op,(e1,_),(e2,_)) ->
if expr_precedence e1 < expr_precedence e
then Format.fprintf fmt "(%a) " print_expr e1
else Format.fprintf fmt "%a " print_expr e1;
Format.pp_print_string fmt (string_of_binary_op op);
if expr_precedence e2 <= expr_precedence e
then Format.fprintf fmt " (%a)" print_expr e2
else Format.fprintf fmt " %a" print_expr e2
| AST_binary_rel (op,(e1,_),(e2,_)) ->
if expr_precedence e1 < expr_precedence e
then Format.fprintf fmt "(%a) " print_expr e1
else Format.fprintf fmt "%a " print_expr e1;
Format.pp_print_string fmt (string_of_binary_rel op);
if expr_precedence e2 <= expr_precedence e
then Format.fprintf fmt " (%a)" print_expr e2
else Format.fprintf fmt " %a" print_expr e2
| AST_binary_bool (op,(e1,_),(e2,_)) ->
if expr_precedence e1 < expr_precedence e
then Format.fprintf fmt "(%a) " print_expr e1
else Format.fprintf fmt "%a " print_expr e1;
Format.pp_print_string fmt (string_of_binary_bool op);
if expr_precedence e2 <= expr_precedence e
then Format.fprintf fmt " (%a)" print_expr e2
else Format.fprintf fmt " %a" print_expr e2
| AST_arrow ((e1,_),(e2,_)) ->
if expr_precedence e1 < expr_precedence e
then Format.fprintf fmt "(%a) " print_expr e1
else Format.fprintf fmt "%a " print_expr e1;
Format.pp_print_string fmt "->";
if expr_precedence e2 <= expr_precedence e
then Format.fprintf fmt " (%a)" print_expr e2
else Format.fprintf fmt " %a" print_expr e2
| AST_int_const (i,_) -> Format.pp_print_string fmt i
| AST_real_const (i,_) -> Format.pp_print_string fmt i
| AST_bool_const b -> Format.pp_print_bool fmt b
| AST_if((c,_), (t,_), (e,_)) ->
Format.fprintf fmt
"if %a then %a else %a"
print_expr c print_expr t print_expr e
| AST_identifier (v,_) -> print_id fmt v
| AST_idconst (v,_) -> print_id fmt v
| AST_instance ((i,_),l, _) ->
Format.fprintf fmt "%a(%a)"
print_id i (print_list print_expr ", ") (List.map fst l)
(* equations *)
let indent ind = ind^" "
let rec print_vars ind fmt = function
| [] -> ()
| v ->
Format.fprintf fmt "%svar" ind;
List.iter (fun d -> Format.fprintf fmt " %a;" print_var_decl d) v;
Format.fprintf fmt "@\n";
and print_var_decl fmt (pr, (i, _), ty) =
Format.fprintf fmt "%s%s: %s"
(if pr then "probe " else "")
i
(string_of_typ ty)
and print_body ind fmt body =
Format.fprintf fmt "%slet@\n%a%stel@\n"
ind (print_block ind) body ind
and print_eqn ind fmt = function
| AST_assign (l,(e,_)) ->
Format.fprintf fmt "%s%a = %a;@\n"
ind (print_list print_id_ext ", ") l print_expr e
| AST_assume((i, _), (e, _)) ->
Format.fprintf fmt "%sassume %s: %a;@\n"
ind i print_expr e
| AST_guarantee((i, _), (e, _)) ->
Format.fprintf fmt "%sguarantee %s: %a;@\n"
ind i print_expr e
| AST_automaton a -> print_automaton ind fmt a
| AST_activate a -> print_activate ind fmt a
and print_activate ind fmt (x, r) =
Format.fprintf fmt "%sactivate@\n" ind;
print_activate_if (indent ind) fmt x;
Format.fprintf fmt "%sreturns %a;@\n" ind (print_list print_id ", ") r
and print_activate_if ind fmt = function
| AST_activate_if((c, _), t, e) ->
Format.fprintf fmt "%sif %a then@\n" ind print_expr c;
print_activate_if (indent ind) fmt t;
Format.fprintf fmt "%selse@\n" ind;
print_activate_if (indent ind) fmt e
| AST_activate_body(b) ->
print_vars ind fmt b.act_locals;
print_body ind fmt b.body
and print_automaton ind fmt (n, sts, r) =
Format.fprintf fmt "%sautomaton %s@\n" ind n;
List.iter (print_state (indent ind) fmt) sts;
Format.fprintf fmt "%sreturns %a;@\n" ind (print_list print_id ", ") r
and print_state ind fmt (st, _) =
Format.fprintf fmt "%s%sstate %s@\n"
ind (if st.initial then "initial " else "") st.st_name;
print_vars ind fmt st.st_locals;
print_body ind fmt st.body;
if st.until <> [] then begin
Format.fprintf fmt "%suntil@\n" ind;
List.iter (fun ((e, _),(s, _), reset) ->
Format.fprintf fmt "%sif %a %s %s;@\n" (indent ind) print_expr e (if reset then "restart" else "resume") s)
st.until
end
and print_block ind fmt b =
List.iter (fun (bb,_) -> print_eqn (indent ind) fmt bb) b
(* declarations *)
and print_node_decl fmt (d : node_decl) =
Format.fprintf fmt "node %s(%a) returns(%a)@\n"
d.n_name
(print_list print_var_decl "; ") d.args
(print_list print_var_decl "; ") d.ret;
print_vars "" fmt d.var;
print_body "" fmt d.body
let print_const_decl fmt (d : const_decl) =
Format.fprintf fmt
"const %s: %s = %a@\n@\n"
d.c_name (string_of_typ d.typ)
print_expr (fst d.value)
let print_toplevel fmt = function
| AST_node_decl (n, _) -> print_node_decl fmt n
| AST_const_decl (c, _) -> print_const_decl fmt c
let print_prog fmt p =
List.iter (print_toplevel fmt) p
|
