mirror of
https://github.com/kanaka/mal.git
synced 2024-09-21 18:48:12 +03:00
45 lines
932 B
Ada
45 lines
932 B
Ada
with Ada.Text_IO;
|
|
with Printer;
|
|
with Reader;
|
|
with Types;
|
|
|
|
procedure Step1_Read_Print is
|
|
|
|
function Read (Param : String) return Types.Mal_Handle is
|
|
begin
|
|
return Reader.Read_Str (Param);
|
|
end Read;
|
|
|
|
function Eval (Param : Types.Mal_Handle) return Types.Mal_Handle is
|
|
begin
|
|
return Param;
|
|
end Eval;
|
|
|
|
function Print (Param : Types.Mal_Handle) return String is
|
|
begin
|
|
return Printer.Pr_Str (Param);
|
|
end Print;
|
|
|
|
function Rep (Param : String) return String is
|
|
AST, Evaluated_AST : Types.Mal_Handle;
|
|
begin
|
|
|
|
AST := Read (Param);
|
|
|
|
if Types.Is_Null (AST) then
|
|
return "";
|
|
else
|
|
Evaluated_AST := Eval (AST);
|
|
return Print (Evaluated_AST);
|
|
end if;
|
|
|
|
end Rep;
|
|
|
|
begin
|
|
loop
|
|
Ada.Text_IO.Put ("user> ");
|
|
exit when Ada.Text_IO.End_Of_File;
|
|
Ada.Text_IO.Put_Line (Rep (Ada.Text_IO.Get_Line));
|
|
end loop;
|
|
end Step1_Read_Print;
|