C# ExpressionStatementSyntax.WithExpression方法代码示例

        /// <summary>
        /// Rewrites the statement with a raise statement.
        /// </summary>
        /// <param name="node">ExpressionStatementSyntax</param>
        /// <returns>SyntaxNode</returns>
        private SyntaxNode RewriteStatement(ExpressionStatementSyntax node)
        {
            var invocation = node.Expression as InvocationExpressionSyntax;

            var arguments = new List<ArgumentSyntax>();
            arguments.Add(invocation.ArgumentList.Arguments[0]);

            arguments[0] = SyntaxFactory.Argument(SyntaxFactory.ParseExpression(
                "typeof(" + arguments[0].ToString() + ")"));
            invocation = invocation.WithArgumentList(SyntaxFactory.ArgumentList(
                SyntaxFactory.SeparatedList(arguments)));

            var text = "{ " +
                node.WithExpression(invocation.WithExpression(SyntaxFactory.IdentifierName("this.Goto"))).ToString() +
                "return; }";
            var rewritten = SyntaxFactory.ParseStatement(text);
            rewritten = rewritten.WithTriviaFrom(node);

            return rewritten;
        }

        /// <summary>
        /// Rewrites the statement with a raise statement.
        /// </summary>
        /// <param name="node">ExpressionStatementSyntax</param>
        /// <returns>SyntaxNode</returns>
        private SyntaxNode RewriteStatement(ExpressionStatementSyntax node)
        {
            var invocation = node.Expression as InvocationExpressionSyntax;
            var arguments = new List<ArgumentSyntax>(invocation.ArgumentList.Arguments);

            arguments[0] = SyntaxFactory.Argument(SyntaxFactory.ParseExpression(
                "new " + arguments[0].ToString() + "()"));
            invocation = invocation.WithArgumentList(SyntaxFactory.ArgumentList(
                SyntaxFactory.SeparatedList(arguments)));

            var rewritten = node.
                WithExpression(invocation.WithExpression(SyntaxFactory.IdentifierName("this.Raise")))
                .WithTriviaFrom(node);

            this.RaiseStmts.Add(rewritten);

            rewritten = rewritten.WithoutTrailingTrivia();

            return rewritten;
        }

        public override SyntaxNode VisitExpressionStatement(ExpressionStatementSyntax node)
        {
            SyntaxNode result = Visit(node.Expression);
            if (result == null)
                return null;

            return result is ExpressionSyntax ? node.WithExpression((ExpressionSyntax)result) : result;
        }

        /// <summary>
        /// Rewrites the statement with a raise statement.
        /// </summary>
        /// <param name="node">ExpressionStatementSyntax</param>
        /// <returns>SyntaxNode</returns>
        private SyntaxNode RewriteStatement(ExpressionStatementSyntax node)
        {
            var invocation = node.Expression as InvocationExpressionSyntax;

            var arguments = new List<ArgumentSyntax>();
            arguments.Add(invocation.ArgumentList.Arguments[0]);

            string payload = "";
            for (int i = 1; i < invocation.ArgumentList.Arguments.Count; i++)
            {
                if (i == invocation.ArgumentList.Arguments.Count - 1)
                {
                    payload += invocation.ArgumentList.Arguments[i].ToString();
                }
                else
                {
                    payload += invocation.ArgumentList.Arguments[i].ToString() + ", ";
                }
            }

            arguments[0] = SyntaxFactory.Argument(SyntaxFactory.ParseExpression(
                "new " + arguments[0].ToString() + "(" + payload + ")"));
            invocation = invocation.WithArgumentList(SyntaxFactory.ArgumentList(
                SyntaxFactory.SeparatedList(arguments)));

            var text = "{ " +
                node.WithExpression(invocation.WithExpression(SyntaxFactory.IdentifierName("this.Raise"))).ToString() +
                "return; }";
            var rewritten = SyntaxFactory.ParseStatement(text);
            rewritten = rewritten.WithTriviaFrom(node);

            return rewritten;
        }

		/// <summary>
		///   Normalizes the <paramref name="statement" />.
		/// </summary>
		public override SyntaxNode VisitExpressionStatement(ExpressionStatementSyntax statement)
		{
			if (!statement.Expression.IsKind(SyntaxKind.InvocationExpression))
				return statement;

			var expression = (InvocationExpressionSyntax)statement.Expression;
			var methodSymbol = expression.GetReferencedSymbol<IMethodSymbol>(SemanticModel);
			if (!methodSymbol.IsBindMethod(SemanticModel))
				return statement;

			var requiredPortReferenceExpression = (InvocationExpressionSyntax)expression.ArgumentList.Arguments[0].Expression;
			var providedPortReferenceExpression = (InvocationExpressionSyntax)expression.ArgumentList.Arguments[1].Expression;

			var requiredPorts = requiredPortReferenceExpression.ResolvePortReferences(SemanticModel);
			var providedPorts = providedPortReferenceExpression.ResolvePortReferences(SemanticModel);

			requiredPorts.RemoveWhere(symbol => !symbol.IsRequiredPort(SemanticModel));
			providedPorts.RemoveWhere(symbol => symbol.IsRequiredPort(SemanticModel));

			if (methodSymbol.Arity == 1)
			{
				var delegateType = (INamedTypeSymbol)methodSymbol.TypeArguments[0];
				MethodSymbolFilter.Filter(requiredPorts, delegateType);
				MethodSymbolFilter.Filter(providedPorts, delegateType);
			}
			else
				MethodSymbolFilter.Filter(requiredPorts, providedPorts);

			// The analyzer guarantees that there is exactly one port in each set now, but just to be sure...
			Assert.That(requiredPorts.Count == 1, "Expected exactly one required port at this point.");
			Assert.That(providedPorts.Count == 1, "Expected exactly one provided port at this point.");

			var requiredPortExpression = requiredPortReferenceExpression.ArgumentList.Arguments[0].Expression;
			var providedPortExpression = providedPortReferenceExpression.ArgumentList.Arguments[0].Expression;

			var requiredPortReference = CreatePortReference(requiredPorts.Single(), requiredPortExpression);
			var providedPortReference = CreatePortReference(providedPorts.Single(), providedPortExpression);

			var binderType = Syntax.TypeExpression(SemanticModel.GetTypeSymbol(typeof(PortBinding)));
			var binderInstance = Syntax.ObjectCreationExpression(binderType, requiredPortReference, providedPortReference);
			var bindMemberAccess = Syntax.MemberAccessExpression(binderInstance, nameof(PortBinding.Bind));
			var invocation = (ExpressionSyntax)Syntax.InvocationExpression(bindMemberAccess);

			return statement.WithExpression(invocation).NormalizeWhitespace().WithTrivia(statement).PrependLineDirective(statement.GetLineNumber());
		}