/// <summary>
/// Starts the toploop running using specified input, output and error streams
///
/// </summary>
/// <param name="reader"></param>
/// <param name="writer"></param>
/// <param name="error"></param>
public void Run(TextReader reader, TextWriter writer, TextWriter error)
{
Symbol LAST = Symbol.FromName("?");
while (true)
{
try
{
Object o = trace ? Runtime.EvalString("(eval (prl (read (in Console))))", environment)
: Runtime.EvalString("(eval (read (in Console)))", environment);
if (o == Reader.EOFVALUE)
{
return;
}
if (tracereturn)
{
writer.Write(prompt);
writer.WriteLine(Printer.WriteToString(o));
}
environment.AssignLocal(LAST, o);
}
catch (LSharpException e)
{
error.WriteLine(e.Message);
}
catch (Exception e)
{
error.WriteLine(e.GetBaseException());
}
}
}
public static Macro Decrement(Environment environment)
{
return((Macro)Runtime.EvalString("(macro (x) `(= ,x (- ,x 1)))", environment));
}
public static Macro ListP(Environment environment)
{
return((Macro)Runtime.EvalString("(macro (l) `(eq (typeof LSharp.Cons) (gettype ,l)))", environment));
}
public static Macro DefMacro(Environment environment)
{
return((Macro)Runtime.EvalString("(macro (name args &rest body) `(= ,name (macro ,args ,@body)))", environment));
}
public static Object EvalString(Cons args, Environment environment)
{
return(Runtime.EvalString(args.First().ToString(), environment));
}