public static bool TryCreate(Scanner scanner, ILogger logger, out CommandletParserBase parser)
{
var anchor = scanner.MakeAnchor();
if (!scanner.Expect('+'))
{
logger.Report(LogLevel.Error, scanner.Pointer.AsRange(scanner.Source), Messages.Error_InstructionExpected);
parser = null;
return(false);
}
scanner.SkipWhitespaces();
var name = scanner.Read(c => char.IsLetterOrDigit(c) || c == '-');
Type parserType;
if (!CommandletParsers.TryGetValue(name.ToLowerInvariant(), out parserType))
{
logger.Report(LogLevel.Error, scanner.Pointer.AsRange(scanner.Source), Messages.Error_UnknownInstruction);
parser = null;
return(false);
}
var nameNode = new LiteralNode <string>($"+{name}", anchor.Range);
parser = (CommandletParserBase)Activator.CreateInstance(parserType);
parser.CommandletNameNode = nameNode;
return(true);
}
public static bool TryReadBaseNoteName(Scanner scanner, ILogger logger,
out LiteralNode <BaseNoteName> baseNoteNameNode)
{
var noteNameChar = scanner.Read();
BaseNoteName baseNoteName;
if (!BaseNoteNames.TryParse(noteNameChar, out baseNoteName))
{
baseNoteNameNode = null;
return(false);
}
baseNoteNameNode = new LiteralNode <BaseNoteName>(baseNoteName, scanner.LastReadRange);
return(true);
}
