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toProlog.ml~
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/
toProlog.ml~
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open Ast
let rec print_prolog e =
match e with
| ASTNum(n) -> Printf.printf "%d" n
| ASTBool(b) -> Printf.printf "%b" b
| ASTId(id) -> Printf.printf "%s" id
| ASTIf(cond, cons, alt) -> print_if cons cond alt
| ASTPrim(op, e1, e2) -> print_prim op e1 e2
| ASTEmpty -> ()
and print_prim op e1 e2 =
Printf.printf "%s(" (string_of_op op);
print_prolog e1;
Printf.printf " ";
print_prolog e2;
Printf.printf ")"
and print_if cond cons alt =
Printf.printf "if(";
print_prolog cond;
Printf.printf ", ";
print_prolog cons;
Printf.printf ", ";
print_prolog alt;
Printf.printf ")"
and print_expressions first next =
Printf.printf "exprs(";
let current_expr = ref next in
while is_empty (!next) = false do
(** TODO: complete **)
done;
Printf.printf ")"
let () =
try
let lexbuf = Lexing.from_channel stdin in
let e = Parser.line Lexer.token lexbuf in
print_prolog e;
print_char '\n'
with Lexer.Eof -> exit 0