C# NextAction类代码示例

        public override void AddIndentBlockOperations(List<IndentBlockOperation> list, SyntaxNode node, OptionSet optionSet, NextAction<IndentBlockOperation> nextOperation)
        {
            nextOperation.Invoke(list);

            var queryExpression = node as QueryExpressionSyntax;
            if (queryExpression != null)
            {
                var firstToken = queryExpression.FromClause.Expression.GetFirstToken(includeZeroWidth: true);
                var lastToken = queryExpression.FromClause.Expression.GetLastToken(includeZeroWidth: true);
                AddIndentBlockOperation(list, queryExpression.FromClause.FromKeyword, firstToken, lastToken);

                for (int i = 0; i < queryExpression.Body.Clauses.Count; i++)
                {
                    // if it is nested query expression
                    var fromClause = queryExpression.Body.Clauses[i] as FromClauseSyntax;
                    if (fromClause != null)
                    {
                        firstToken = fromClause.Expression.GetFirstToken(includeZeroWidth: true);
                        lastToken = fromClause.Expression.GetLastToken(includeZeroWidth: true);
                        AddIndentBlockOperation(list, fromClause.FromKeyword, firstToken, lastToken);
                    }
                }

                // set alignment line for query expression
                var baseToken = queryExpression.GetFirstToken(includeZeroWidth: true);
                var endToken = queryExpression.GetLastToken(includeZeroWidth: true);
                if (!baseToken.IsMissing && !baseToken.Equals(endToken))
                {
                    var startToken = baseToken.GetNextToken(includeZeroWidth: true);
                    SetAlignmentBlockOperation(list, baseToken, startToken, endToken);
                }
            }
        }

        public override void AddIndentBlockOperations(List<IndentBlockOperation> list, SyntaxNode node, OptionSet optionSet, NextAction<IndentBlockOperation> nextOperation)
        {
            nextOperation.Invoke(list);

            if (s_allowableKinds.Contains(node.Kind()))
            {
                AddChangeSignatureIndentOperation(list, node);
            }
        }

            public override void AddAnchorIndentationOperations(List<AnchorIndentationOperation> list, SyntaxNode node, OptionSet optionSet, NextAction<AnchorIndentationOperation> nextOperation)
            {
                if (node.IsKind(SyntaxKind.SimpleLambdaExpression) || node.IsKind(SyntaxKind.ParenthesizedLambdaExpression) || node.IsKind(SyntaxKind.AnonymousMethodExpression))
                {
                    return;
                }

                nextOperation.Invoke(list);
            }

        private void AddNextIndentBlockOperations(List<IndentBlockOperation> list, SyntaxNode node, OptionSet optionSet, NextAction<IndentBlockOperation> nextOperation)
        {
            if (_vbHelperFormattingRule == null)
            {
                base.AddIndentBlockOperations(list, node, optionSet, nextOperation);
                return;
            }

            _vbHelperFormattingRule.AddIndentBlockOperations(list, node, optionSet, nextOperation);
        }

        public override void AddSuppressOperations(List<SuppressOperation> list, SyntaxNode node, SyntaxToken lastToken, OptionSet optionSet, NextAction<SuppressOperation> nextOperation)
        {
            nextOperation.Invoke(list);

            var queryExpression = node as QueryExpressionSyntax;
            if (queryExpression != null)
            {
                AddSuppressWrappingIfOnSingleLineOperation(list, queryExpression.GetFirstToken(includeZeroWidth: true), queryExpression.GetLastToken(includeZeroWidth: true));
            }
        }

        public override void AddSuppressOperations(List<SuppressOperation> list, SyntaxNode node, SyntaxToken lastToken, OptionSet optionSet, NextAction<SuppressOperation> nextOperation)
        {
            nextOperation.Invoke(list);

            AddInitializerSuppressOperations(list, node);

            AddBraceSuppressOperations(list, node, lastToken);

            AddStatementExceptBlockSuppressOperations(list, node);

            AddSpecificNodesSuppressOperations(list, node);
        }

        public override void AddSuppressOperations(List<SuppressOperation> list, SyntaxNode node, OptionSet optionSet, NextAction<SuppressOperation> nextOperation)
        {
            nextOperation.Invoke(list);

            if (!node.ContainsAnnotations)
            {
                return;
            }

            AddPropertyDeclarationSuppressOperations(list, node);

            AddInitializerSuppressOperations(list, node);
        }

        public override void AddIndentBlockOperations(List<IndentBlockOperation> list, SyntaxNode node, OptionSet optionSet, NextAction<IndentBlockOperation> nextOperation)
        {
            nextOperation.Invoke(list);

            AddBlockIndentationOperation(list, node, optionSet);

            AddLabelIndentationOperation(list, node, optionSet);

            AddSwitchIndentationOperation(list, node, optionSet);

            AddEmbeddedStatementsIndentationOperation(list, node);

            AddTypeParameterConstraintClauseOperation(list, node);
        }

        public override void AddAlignTokensOperations(List<AlignTokensOperation> list, SyntaxNode node, OptionSet optionSet, NextAction<AlignTokensOperation> nextOperation)
        {
            nextOperation.Invoke(list);
            var syntaxNode = node;

            var bracePair = node.GetBracePair();

            if (!bracePair.IsValidBracePair())
            {
                return;
            }

            if (syntaxNode.IsLambdaBodyBlock() ||
                node is InitializerExpressionSyntax)
            {
                AddAlignIndentationOfTokensToFirstTokenOfBaseTokenLineOperation(list, syntaxNode, bracePair.Item1, SpecializedCollections.SingletonEnumerable((SyntaxToken)bracePair.Item2));
            }
        }

        public override void AddIndentBlockOperations(List<IndentBlockOperation> list, SyntaxNode node, OptionSet optionSet, NextAction<IndentBlockOperation> nextOperation)
        {
            nextOperation.Invoke(list);

            var bracePair = node.GetBracePair();

            // don't put block indentation operation if the block only contains lambda expression body block
            if (node.IsLambdaBodyBlock() || !bracePair.IsValidBracePair())
            {
                return;
            }

            if (optionSet.GetOption(CSharpFormattingOptions.OpenCloseBracesIndent))
            {
                AddIndentBlockOperation(list, bracePair.Item1, bracePair.Item1, bracePair.Item1.Span);
                AddIndentBlockOperation(list, bracePair.Item2, bracePair.Item2, bracePair.Item2.Span);
            }
        }

        public override void AddSuppressOperations(List<SuppressOperation> list, SyntaxNode node, OptionSet optionSet, NextAction<SuppressOperation> nextOperation)
        {
            nextOperation.Invoke(list);

            AddBraceSuppressOperations(list, node);

            AddStatementExceptBlockSuppressOperations(list, node);

            AddSpecificNodesSuppressOperations(list, node);

            if (!optionSet.GetOption(CSharpFormattingOptions.WrappingPreserveSingleLine))
            {
                RemoveSuppressOperationForBlock(list, node);
            }

            if (!optionSet.GetOption(CSharpFormattingOptions.WrappingKeepStatementsOnSingleLine))
            {
                RemoveSuppressOperationForStatementMethodDeclaration(list, node);
            }
        }

        public override void AddIndentBlockOperations(List<IndentBlockOperation> list, SyntaxNode node, OptionSet optionSet, NextAction<IndentBlockOperation> nextOperation)
        {
            // for the common node itself, return absolute indentation
            if (_commonNode == node)
            {
                // TODO: If the first line of the span includes a node, we want to align with the position of that node 
                // in the primary buffer.  That's what Dev12 does for C#, but it doesn't match Roslyn's current model
                // of each statement being formatted independently with respect to it's parent.
                list.Add(new IndentBlockOperation(_token1, _token2, _span, _baseIndentation, IndentBlockOption.AbsolutePosition));
            }
            else if (node.Span.Contains(_span))
            {
                // any node bigger than our span is ignored.
                return;
            }

            // Add everything to the list.
            AddNextIndentBlockOperations(list, node, optionSet, nextOperation);

            // Filter out everything that encompasses our span.
            AdjustIndentBlockOperation(list);
        }

        public override void AddAnchorIndentationOperations(List<AnchorIndentationOperation> list, SyntaxNode node, OptionSet optionSet, NextAction<AnchorIndentationOperation> nextOperation)
        {
            nextOperation.Invoke(list);

            var queryClause = node as QueryClauseSyntax;
            if (queryClause != null)
            {
                var firstToken = queryClause.GetFirstToken(includeZeroWidth: true);
                AddAnchorIndentationOperation(list, firstToken, queryClause.GetLastToken(includeZeroWidth: true));
            }

            var selectOrGroupClause = node as SelectOrGroupClauseSyntax;
            if (selectOrGroupClause != null)
            {
                var firstToken = selectOrGroupClause.GetFirstToken(includeZeroWidth: true);
                AddAnchorIndentationOperation(list, firstToken, selectOrGroupClause.GetLastToken(includeZeroWidth: true));
            }

            var continuation = node as QueryContinuationSyntax;
            if (continuation != null)
            {
                AddAnchorIndentationOperation(list, continuation.IntoKeyword, continuation.GetLastToken(includeZeroWidth: true));
            }
        }

        public override void AddSuppressOperations(List<SuppressOperation> list, SyntaxNode node, OptionSet optionSet, NextAction<SuppressOperation> nextOperation)
        {
            nextOperation.Invoke(list);

            SuppressVariableDeclaration(list, node, optionSet);
        }

 public void AddSuppressOperations(List<SuppressOperation> list, SyntaxNode node, OptionSet optionSet, NextAction<SuppressOperation> nextOperation)
 {
     nextOperation.Invoke(list);
 }