public override bool TryParse(Scanner scanner, out PitchNode result)
{
result = new PitchNode();
var anchor = scanner.MakeAnchor();
NoteNameNode noteNameNode;
if (!new NoteNameParser().TryParse(scanner, out noteNameNode))
{
result = null;
return(false);
}
result.NoteName = noteNameNode;
int octave;
if (scanner.TryReadInteger(out octave))
{
result.OctaveGroup = new LiteralNode <int>(octave, scanner.LastReadRange);
}
result.Range = anchor.Range;
return(true);
}
public static bool TryReadInteger(Scanner scanner, out LiteralNode <int> node)
{
int value;
if (!scanner.TryReadInteger(out value))
{
node = null;
return(false);
}
node = new LiteralNode <int>(value, scanner.LastReadRange);
return(true);
}
public static bool TryReadBaseNoteValue(Scanner scanner, ILogger logger,
out LiteralNode <BaseNoteValue> baseNoteValueNode)
{
int reciprocal;
if (!scanner.TryReadInteger(out reciprocal))
{
logger.Report(LogLevel.Error, scanner.LastReadRange, Messages.Error_NoteValueExpected);
baseNoteValueNode = null;
return(false);
}
BaseNoteValue baseNoteValue;
if (!BaseNoteValues.TryParse(reciprocal, out baseNoteValue))
{
logger.Report(LogLevel.Error, scanner.LastReadRange, Messages.Error_InvalidReciprocalNoteValue);
baseNoteValueNode = null;
return(false);
}
baseNoteValueNode = new LiteralNode <BaseNoteValue>(baseNoteValue, scanner.LastReadRange);
return(true);
}