YamlDotNet.Core.Parser.ParseNode C# (CSharp) Method

        private ParsingEvent ParseNode(bool isBlock, bool isIndentlessSequence)
        {
            var alias = GetCurrentToken() as AnchorAlias;
            if (alias != null)
            {
                state = states.Pop();
                ParsingEvent evt = new Events.AnchorAlias(alias.Value, alias.Start, alias.End);
                Skip();
                return evt;
            }

            Mark start = GetCurrentToken().Start;

            Anchor anchor = null;
            Tag tag = null;

            // The anchor and the tag can be in any order. This loop repeats at most twice.
            while (true)
            {
                if (anchor == null && (anchor = GetCurrentToken() as Anchor) != null)
                {
                    Skip();
                }
                else if (tag == null && (tag = GetCurrentToken() as Tag) != null)
                {
                    Skip();
                }
                else
                {
                    break;
                }
            }

            string tagName = null;
            if (tag != null)
            {
                if (string.IsNullOrEmpty(tag.Handle))
                {
                    tagName = tag.Suffix;
                }
                else if (tagDirectives.Contains(tag.Handle))
                {
                    tagName = string.Concat(tagDirectives[tag.Handle].Prefix, tag.Suffix);
                }
                else
                {
                    throw new SemanticErrorException(tag.Start, tag.End, "While parsing a node, find undefined tag handle.");
                }
            }
            if (string.IsNullOrEmpty(tagName))
            {
                tagName = null;
            }

            string anchorName = anchor != null ? string.IsNullOrEmpty(anchor.Value) ? null : anchor.Value : null;

            var isImplicit = string.IsNullOrEmpty(tagName);

            if (isIndentlessSequence && GetCurrentToken() is BlockEntry)
            {
                state = ParserState.IndentlessSequenceEntry;

                return new Events.SequenceStart(
                           anchorName,
                           tagName,
                           isImplicit,
                           SequenceStyle.Block,
                           start,
                           GetCurrentToken().End
                       );
            }
            else
            {
                var scalar = GetCurrentToken() as Scalar;
                if (scalar != null)
                {
                    bool isPlainImplicit = false;
                    bool isQuotedImplicit = false;
                    if ((scalar.Style == ScalarStyle.Plain && tagName == null) || tagName == Constants.DefaultHandle)
                    {
                        isPlainImplicit = true;
                    }
                    else if (tagName == null)
                    {
                        isQuotedImplicit = true;
                    }

                    state = states.Pop();
                    ParsingEvent evt = new Events.Scalar(anchorName, tagName, scalar.Value, scalar.Style, isPlainImplicit, isQuotedImplicit, start, scalar.End);

                    Skip();
                    return evt;
                }

                var flowSequenceStart = GetCurrentToken() as FlowSequenceStart;
                if (flowSequenceStart != null)
                {
                    state = ParserState.FlowSequenceFirstEntry;
                    return new Events.SequenceStart(anchorName, tagName, isImplicit, SequenceStyle.Flow, start, flowSequenceStart.End);
                }

                var flowMappingStart = GetCurrentToken() as FlowMappingStart;
                if (flowMappingStart != null)
                {
                    state = ParserState.FlowMappingFirstKey;
                    return new Events.MappingStart(anchorName, tagName, isImplicit, MappingStyle.Flow, start, flowMappingStart.End);
                }

                if (isBlock)
                {
                    var blockSequenceStart = GetCurrentToken() as BlockSequenceStart;
                    if (blockSequenceStart != null)
                    {
                        state = ParserState.BlockSequenceFirstEntry;
                        return new Events.SequenceStart(anchorName, tagName, isImplicit, SequenceStyle.Block, start, blockSequenceStart.End);
                    }

                    var blockMappingStart = GetCurrentToken() as BlockMappingStart;
                    if (blockMappingStart != null)
                    {
                        state = ParserState.BlockMappingFirstKey;
                        return new Events.MappingStart(anchorName, tagName, isImplicit, MappingStyle.Block, start, GetCurrentToken().End);
                    }
                }

                if (anchorName != null || tag != null)
                {
                    state = states.Pop();
                    return new Events.Scalar(anchorName, tagName, string.Empty, ScalarStyle.Plain, isImplicit, false, start, GetCurrentToken().End);
                }

                var current = GetCurrentToken();
                throw new SemanticErrorException(current.Start, current.End, "While parsing a node, did not find expected node content.");
            }
        }