/// <summary>Pushes a new set of variables, to start a scope.</summary>
public void PushVarSet()
{
LVarIDs.Push(CLVariables.Count);
CLVariables.Add(new List <SingleCILVariable>());
}
/// <summary>
/// Returns the object referenced by the name.
/// </summary>
/// <param name="vars">A <c>CLLocalStore</c> that stores local
/// variables.</param>
/// <param name="context">The object representing the context in which
/// the expression is being evaluated.</param>
public CalcObject GetObject(CLLocalStore vars = null, CLContextProvider context = null)
{
vars ??= new CLLocalStore();
context ??= new CLContextProvider();
if (Name.StartsWith("!"))
{
if (CLCodeFunction.Exists(Name.Substring(1)))
{
return(new CalcCodeFunction(Name.Substring(1), Params));
}
}
if (Name.StartsWith("_") || Name.StartsWith("^"))
{
if (!(vars.ContainsVar(Name)))
{
throw new CLException("No variable named " + Name + " exists.");
}
else
{
return(vars[Name]);
}
}
int count = 0;
if (Int32.TryParse(Name, out count))
{
if (count == 0)
{
return(new CalcString(Name));
}
if (vars.ParamCount >= count)
{
return(vars[count - 1]);
}
else if (Params.Length > 0)
{
return(Params[0]);
}
else
{
throw new CLException("No parameter #" + count + " exists.");
}
}
if (Name == "...")
{
return(new CalcListExpression(vars.CopyParams()));
}
CalcObject ret = CLVariables.Load(Name, context);
if (ret != null)
{
return(ret);
}
throw new CLException("No variable named " + Name + " exists.");
}
