public static async Task <StructureExtractor> TrainExtractorAsync(IEnumerable <Tuple <string, uint, uint> > examples, IEnumerable <string> noneLabeledExamples = null)
{
if (null == examples || !examples.Any())
{
throw new AggregateException($"{nameof(examples)} must not be null or empty");
}
var regionSession = new RegionSession();
foreach (var example in examples)
{
var stringRegion = new StringRegion(example.Item1, Semantics.Tokens);
var field = stringRegion.Slice(example.Item2, example.Item3);
regionSession.AddConstraints(new RegionExample(stringRegion, field));
}
if (noneLabeledExamples?.Any() == true)
{
regionSession.AddInputs(noneLabeledExamples.Select(e => new StringRegion(e, Semantics.Tokens)));
}
var program = await regionSession.LearnAsync();
if (null == program)
{
throw new Exception("No program found");
}
return(new StructureExtractor(program));
}