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|
open Util
open Ast
open Formula
open Ast_printer
let string_of_binary_rel = function
| AST_EQ -> "="
| AST_NE -> "≠"
| AST_LT -> "<"
| AST_LE -> "≤"
| AST_GT -> ">"
| AST_GE -> "≥"
let ne_prec = function
| NUnary(op, _) -> unary_precedence
| NBinary(op, _, _) -> binary_op_precedence op
| _ -> 100
let be_prec = function
| BRel(op, _, _) -> binary_rel_precedence op
| BAnd _ -> binary_bool_precedence AST_AND
| BOr _ -> binary_bool_precedence AST_OR
| BNot _ -> unary_precedence
| _ -> 100
let is_or = function
| BOr _ -> true
| _ -> false
let is_and = function
| BAnd _ -> true
| _ -> false
let print_ch fmt pf fa a fe e =
if fa a < fe e
then Format.fprintf fmt "@[<hv 2>(%a)@]" pf a
else Format.fprintf fmt "@[<hv 2>%a@]" pf a
let print_ah fmt pf fa a fe e =
if fa a <= fe e
then Format.fprintf fmt "@[<hv 2>(%a)@]" pf a
else Format.fprintf fmt "@[<hv 2>%a@]" pf a
let print_id fmt id =
let re = Str.regexp "/" in
Format.fprintf fmt "%s" (Str.global_replace re "·" id)
let rec print_num_expr fmt e = match e with
| NIntConst i -> Format.fprintf fmt "%d" i
| NRealConst f -> Format.fprintf fmt "%f" f
| NIdent id ->
print_id fmt id
| NBinary(op, a, b) ->
print_ch fmt print_num_expr ne_prec a ne_prec e;
Format.fprintf fmt "@ %s " (string_of_binary_op op);
print_ah fmt print_num_expr ne_prec b ne_prec e
| NUnary(op, a) ->
Format.fprintf fmt "%s " (string_of_unary_op op);
print_ah fmt print_num_expr ne_prec a ne_prec e
(* Enumeated expressions *)
let print_enum_expr fmt = function
| EIdent id -> print_id fmt id
| EItem x -> Format.fprintf fmt "%s" x
let str_of_enum_op = function
| E_EQ -> "≡"
| E_NE -> "≢"
let print_econs fmt (op, a, b) =
Format.fprintf fmt "%a %s %a"
print_id a (str_of_enum_op op) print_enum_expr b
(* Print boolean form of formula *)
let rec print_bool_expr fmt e = match e with
| BConst b -> Format.fprintf fmt "%s" (if b then "true" else "false")
| BEnumCons c -> print_econs fmt c
| BRel(op, a, b) ->
print_ch fmt print_num_expr ne_prec a be_prec e;
Format.fprintf fmt "@ %s " (string_of_binary_rel op);
print_ch fmt print_num_expr ne_prec b be_prec e
| BAnd (a, b) ->
if is_and a then
Format.fprintf fmt "%a" print_bool_expr a
else
if be_prec a < be_prec e || is_or a
then Format.fprintf fmt "@[<hv 2>(%a)@]" print_bool_expr a
else Format.fprintf fmt "@[<hv 2>%a@]" print_bool_expr a;
Format.fprintf fmt "@ ∧ ";
if is_and b then
Format.fprintf fmt "%a" print_bool_expr b
else
if be_prec b < be_prec e || is_or b
then Format.fprintf fmt "@[<hv 2>(%a)@]" print_bool_expr b
else Format.fprintf fmt "@[<hv 2>%a@]" print_bool_expr b
| BOr (a, b) ->
print_ch fmt print_bool_expr be_prec a be_prec e;
Format.fprintf fmt "@ ∨ ";
print_ch fmt print_bool_expr be_prec b be_prec e
| BNot (a) ->
Format.pp_print_string fmt "¬";
print_ch fmt print_bool_expr be_prec a be_prec e
let print_expr fmt e =
Format.fprintf fmt "@[<hv 2>%a@]" print_bool_expr e
(* Print constraint list form of formula *)
let print_cons_sg fmt sg =
let sg_str = match sg with
| CONS_EQ -> "="
| CONS_NE -> "≠"
| CONS_GT -> ">"
| CONS_GE -> "≥"
in
Format.fprintf fmt "%s" sg_str
let print_cons fmt (eq, sg) =
Format.fprintf fmt "@[<hv 2>%a %a 0@]"
print_num_expr eq print_cons_sg sg
let rec print_conslist fmt (econs, cons, e) =
let c =
(List.map (fun x -> Left x) econs) @ (List.map (fun y -> Right y) cons)
in
let f fmt = function
| Left x -> Format.fprintf fmt "@[<hv 2>%a@]" print_econs x
| Right x -> Format.fprintf fmt "@[<hv 2>%a@]" print_cons x
in
let rec aux = function
| [] -> false
| [a] ->
f fmt a; true
| p::q ->
f fmt p;
Format.fprintf fmt "@ ∧ ";
aux q
in
match e with
| CLTrue ->
Format.fprintf fmt "@[<hv 2>(";
ignore (aux c);
Format.fprintf fmt ")@]"
| CLFalse ->
Format.fprintf fmt "false"
| _ ->
Format.fprintf fmt "@[<hv 2>(";
if aux c then Format.fprintf fmt "@ ∧ ";
print_conslist_expr fmt e;
Format.fprintf fmt ")@]"
and print_conslist_expr fmt = function
| CLTrue -> Format.fprintf fmt "true"
| CLFalse -> Format.fprintf fmt "false"
| CLOr(a, b) ->
Format.fprintf fmt "@[<hv 2>(%a@ ∨ %a)@]"
print_conslist a
print_conslist b
| CLAnd(a, b) ->
Format.fprintf fmt "%a@ ∧ %a"
print_conslist_expr a
print_conslist_expr b
|
