public override Value Invoke(Value[] args)
{
NestedEnv env = new NestedEnv(Env);
if (CheckAndFill(args, Params, ParamTypes, Defaults, env, false, out string err))
{
return(Body.GetValue(null, env));
}
else
{
Value r = NilValue.Nil;
r["err"] = new StringValue(err);
return(r);
}
}
public static void TestParser()
{
string s = "(996 + 1.2 - 6 * (prev - 1) / prev - 3 * 5 * 13.6 / ext / k)";
StringReader reader = new StringReader(s);
TokenStream ts = new TokenStream(reader);
ts.AddTokenizers(
new IdTokenizer(),
new DecimalTokenizer(),
new DigitTokenizer(),
new StringTokenizer(),
new NameTokenizer()
);
Parser parser = CreateProgramParser();
NestedEnv env = Buildin.CreateBuindinEnv();
List <IASTNode> res = new List <IASTNode>();
Console.Write(">>> ");
while ((s = Console.ReadLine()) != ".exit")
{
ts.Reset(new StringReader(s));
if (!parser.Parse(ts, res) || res.Count == 0)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Parse failed");
Console.ResetColor();
}
else
{
IASTNode node = res[0].Reduce();
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("Parse succeeded");
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine(node.ToString());
Console.ResetColor();
string result = node.GetValue(null, env).ToString();
Console.WriteLine();
Console.ForegroundColor = ConsoleColor.Blue;
Console.WriteLine("==> " + result);
Console.ResetColor();
//PrintAST(node);
}
res.Clear();
Console.Write(">>> ");
}
}
