private IEnumerable<IArgument> InternExecute(IProgramSequence progSeq)
{
IEnumerable<IArgument> result = new IArgument[0];
foreach (ICommand comm in progSeq.Commands)
{
// Get command if exists.
var match = Resolver.Resolve(comm, Environments);
// Execute command and combine with other results.
if (match != null){
result = result.Concat(match.ExecuteCommand());
}
else
throw new UnknownCommandException(comm);
}
return result;
}
