public static IFunction Call(this IFunction function, IFunction[] arguments, string output,
CompilationContext info, CallSite?callSite = null)
{
if (function == null)
{
throw new ArgumentNullException(nameof(function));
}
if (callSite.HasValue)
{
info.Push(callSite.Value);
}
var retval = function.CallInternal(arguments, output, info);
if (callSite.HasValue)
{
info.Pop();
}
return(retval);
}
