Hello,
One of my projects stores string data and configs in one file. This file is usually edited by hand and can contain blank lines and comments. I need to read config and data, filtering comments. At first i tried to use LineIterator? and FilteringIterator?, but they don't share the same interface. After searching for a "right" solution for half an hour i wrote this class:
class StreamIteratorAdaptor(V) : Iterator!(V[])
{
StreamIterator!(V) iterator;
this(StreamIterator!(V) iterator)
{
this.iterator = iterator;
}
public bool more()
{
V[] token = iterator.next();
if (token.ptr)
{
iterator.push(token);
}
return token !is null;
}
public V[] get()
{
return iterator.next;
}
int opApply(int delegate (ref V[] value) dg)
{
return iterator.opApply(dg);
}
}
Did i miss something? Can i do this in tango without Adaptor:
void main()
{
auto conduit = new FileConduit("somefile");
auto buffer = new Buffer(conduit);
auto lines = new LineIterator!(char)(buffer);
auto adaptor = new StreamIteratorAdaptor!(char)(lines);
auto predicate = delegate bool (char[] line) { return line.length > 0 && line[0] != '#';};
auto iterator = new FilteringIterator!(char[])(adaptor, predicate);
parseConfig(iterator.get());
parseConfig(iterator.get());
foreach (line; iterator)
{
parseData(line);
}
}
