protected object EvaluateNativeFunction(Environment env, NativeFunction function)
{
if (function == null)
{
throw new ArgumentNullException(nameof(function), "null function");
}
int pcount = function.ParametersCount;
if (Count != pcount)
{
throw new LepException("bad number of arguments", this);
}
object[] arguments = new object[pcount];
int count = 0;
foreach (IAstNode node in this)
{
arguments[count++] = node.Evaluate(env);
}
return(function.Invoke(arguments, this));
}
public object Evaluate(Environment env, object target)
{
UserFunction user = target as UserFunction;
if (user != null)
{
return(EvaluateFunction(env, user));
}
NativeFunction native = target as NativeFunction;
if (native != null)
{
return(EvaluateNativeFunction(env, native));
}
throw new LepException("bad function", this);
}
protected object EvaluateNativeFunction(Environment env, NativeFunction function)
{
if (function == null)
{
throw new ArgumentNullException(nameof(function), "null function");
}
int pcount = function.ParametersCount;
Tuple arguments = Evaluate(env) as Tuple;
if (arguments == null)
{
throw new LepException("bad expression argument", this);
}
if (arguments.Count != pcount)
{
throw new LepException("bad number of argument", this);
}
return(function.Invoke(arguments.GetArray(), this));
}
