private bool Evaluate(Program program, object input)
{
if (program.IsFolder) return HandleFolderScript(program, input);
if (program.IsType) return HandleTypeScript(program, input);
if (program.IsProperty) return HandlePropertyScript(program, input);
if (program.IsMulti) return HandleMultiScript(program, input);
if (program.IsError) return HandleErrorScript(program, input);
throw new SyntaxErrorException("Script not recognised\n" + program.ToString());
}