/// <summary>
/// Processes a file.
/// </summary>
/// <returns>The file.</returns>
/// <param name="fileName">File name.</param>
public Value EvaluateFile(string fileName)
{
var sexpr = new SExprValue();
sexpr.Cell.Add(new BuiltinFuncValue(Builtins.Load));
sexpr.Cell.Add(StringValue.ReadEscapedString(fileName));
return(Evaluate(sexpr));
}