public override object Eval(Context context)
{
//evaluated parameters
var evaluatedParameters = new object[ParametersValues.Length];
for (var i = 0; i < ParametersValues.Length; i++)
{
evaluatedParameters[i] = ParametersValues[i].Eval(context);
}
//get function
var func = (Delegate)Function.Eval(context);
//internal
if (Function is Lambda)
{
return(func.DynamicInvoke(new[] { evaluatedParameters }));
}
//external
else
{
return(func.DynamicInvoke(evaluatedParameters));
}
}
public override object Eval(Context context)
{
var ret = Value.Eval(context);
context.Define(Name, ret);
return(ret);
}
public override object Eval(Context context)
{
var ret = new ArrayList();
while ((bool)Condition.Eval(context))
{
ret.Add(Body.Eval(context));
}
return(ret.ToArray());
}
public override object Eval(Context context)
{
if ((bool)Condition.Eval(context))
{
return(TrueAst.Eval(context));
}
else
{
return(FalseAst.Eval(context));
}
}
public override object Eval(Context context)
{
switch (Op)
{
case "++": {
var variable = (Get)Left;
var value = (double)variable.Eval(context);
context.Set(variable.Name, value + 1);
return(value);
}
case "--": {
var variable = (Get)Left;
var value = (double)variable.Eval(context);
context.Set(variable.Name, value + 1);
return(value);
}
case "+": return((double)Left.Eval(context) + (double)Right.Eval(context));
case "-": return((double)Left.Eval(context) - (double)Right.Eval(context));
case "*": return((double)Left.Eval(context) * (double)Right.Eval(context));
case "/": return((double)Left.Eval(context) / (double)Right.Eval(context));
case "<": return((double)Left.Eval(context) < (double)Right.Eval(context));
case ">": return((double)Left.Eval(context) > (double)Right.Eval(context));
default: return(0);
}
}
public override object Eval(Context context)
{
return(new Func <object[], object>(arguments => {
var funcContext = context.Extend();
for (var i = 0; i < arguments.Length; i++)
{
funcContext.Define(
ParameterNames[i],
arguments[i]
);
}
return Body.Eval(funcContext);
}));
}
public override object Eval(Context context)
{
var ret = new ArrayList();
var from = (double)From.Eval(context);
var to = (double)To.Eval(context);
var step = (double)Step.Eval(context);
context.Define(Variable, from);
for (var i = from; i <= to; i += step)
{
context.Set(Variable, i);
ret.Add(Body.Eval(context));
}
return(ret.ToArray());
}
private object Eval(Ast ast)
{
var context = new Context();
context.Define("sin",
new Func <double, double>(Math.Sin)
);
context.Define("format",
new Func <string, object[], string>((s, values) => {
//var parameters = new string[values.Length];
//for (int i = 0; i < values.Length; i++) {
// parameters[i] = values.ToString();
//}
return(string.Format(s, values.Select(i => i.ToString()).ToArray()));
})
);
context.Define("log",
new Action <string>(value => Debug.WriteLine(value))
);
return(ast.Eval(context));
}
