public override void EnterExample(VowpalWabbitParser.ExampleContext context)
{
this.example = new Test1()
{
Features = new List<KeyValuePair<string, float>>()
};
}
public override void ExitLabel_simple(VowpalWabbitParser.Label_simpleContext context)
{
this.example.Label = new SimpleLabel()
{
Label = context.value.value
};
}
public override void ExitFeatureSparse(VowpalWabbitParser.FeatureSparseContext context)
{
var index = context.index.Text;
var x = context.x.value;
if (index == "const")
{
this.example.Constant = x;
}
else
{
this.example.Features.Add(new KeyValuePair<string, float>(index, x));
}
}
internal static void ParseInput(ICharStream stream, IParseTreeListener listener)
{
// optimized for memory consumption
var lexer = new VowpalWabbitLexer(stream)
{
TokenFactory = new CommonTokenFactory(copyText: true)
};
var tokens = new UnbufferedTokenStream(lexer);
var parser = new VowpalWabbitParser(tokens)
{
// Note; don't disable, as it is required to access the line
// BuildParseTree = false,
};
// fast than LL(*)
parser.Interpreter.PredictionMode = PredictionMode.Sll;
parser.AddParseListener(listener);
parser.AddErrorListener(new TestErrorListener());
parser.start();
}
public override void ExitNumber(VowpalWabbitParser.NumberContext context)
{
context.value = float.Parse(context.GetText(), CultureInfo.InvariantCulture);
}
public override void ExitExample(VowpalWabbitParser.ExampleContext context)
{
this.example.Line = context.GetText();
this.action(this.example);
}
public override void ExitExample(VowpalWabbitParser.ExampleContext context)
{
this.stopwatch.Start();
this.vw.Learn(this.example, this.label);
this.stopwatch.Stop();
}
public override void EnterExample(VowpalWabbitParser.ExampleContext context)
{
this.label = null;
this.example.Features.Clear();
}
public override void ExitFeatureSparse(VowpalWabbitParser.FeatureSparseContext context)
{
this.example.Features.Add(
new KeyValuePair<string, float>(
context.index.Text,
context.x.value));
}
public override void ExitExample(VowpalWabbitParser.ExampleContext context)
{
this.stopwatch.Start();
using (var vwExample = this.vw.ReadExample(this.example))
{
vwExample.Learn();
}
this.stopwatch.Stop();
}