Ejemplo n.º 1
0
        public static async Task ComputeRefactoringsAsync(RefactoringContext context, InvocationExpressionSyntax invocation)
        {
            if (invocation.IsParentKind(SyntaxKind.ExpressionStatement))
            {
                return;
            }

            SimpleMemberInvocationExpressionInfo invocationInfo = SyntaxInfo.SimpleMemberInvocationExpressionInfo(invocation);

            if (!invocationInfo.Success)
            {
                return;
            }

            switch (invocationInfo.NameText)
            {
            case "First":
            {
                if (invocationInfo.Arguments.Any())
                {
                    break;
                }

                SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);

                if (!UseElementAccessAnalysis.IsFixableFirst(invocationInfo, semanticModel, context.CancellationToken))
                {
                    break;
                }

                context.RegisterRefactoring(
                    "Use [] instead of calling 'First'",
                    ct => UseElementAccessInsteadOfEnumerableMethodRefactoring.UseElementAccessInsteadOfFirstAsync(context.Document, invocation, ct),
                    RefactoringDescriptors.UseElementAccessInsteadOfLinqMethod);

                break;
            }

            case "Last":
            {
                if (invocationInfo.Arguments.Any())
                {
                    break;
                }

                SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);

                if (!UseElementAccessAnalysis.IsFixableLast(invocationInfo, semanticModel, context.CancellationToken))
                {
                    break;
                }

                string propertyName = CSharpUtility.GetCountOrLengthPropertyName(invocationInfo.Expression, semanticModel, context.CancellationToken);

                if (propertyName == null)
                {
                    break;
                }

                context.RegisterRefactoring(
                    "Use [] instead of calling 'Last'",
                    ct => UseElementAccessInsteadOfEnumerableMethodRefactoring.UseElementAccessInsteadOfLastAsync(context.Document, invocation, propertyName, ct),
                    RefactoringDescriptors.UseElementAccessInsteadOfLinqMethod);

                break;
            }

            case "ElementAt":
            {
                if (invocationInfo.Arguments.SingleOrDefault(shouldThrow: false)?.Expression?.IsMissing != false)
                {
                    break;
                }

                SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);

                if (!UseElementAccessAnalysis.IsFixableElementAt(invocationInfo, semanticModel, context.CancellationToken))
                {
                    break;
                }

                context.RegisterRefactoring(
                    "Use [] instead of calling 'ElementAt'",
                    ct => UseElementAccessInsteadOfEnumerableMethodRefactoring.UseElementAccessInsteadOfElementAtAsync(context.Document, invocation, ct),
                    RefactoringDescriptors.UseElementAccessInsteadOfLinqMethod);

                break;
            }
            }
        }
        public static async Task ComputeRefactoringsAsync(RefactoringContext context, InvocationExpressionSyntax invocationExpression)
        {
            if (context.IsAnyRefactoringEnabled(
                    RefactoringIdentifiers.UseElementAccessInsteadOfEnumerableMethod,
                    RefactoringIdentifiers.ReplaceAnyWithAllOrAllWithAny,
                    RefactoringIdentifiers.CallExtensionMethodAsInstanceMethod,
                    RefactoringIdentifiers.ReplaceStringContainsWithStringIndexOf))
            {
                ExpressionSyntax expression = invocationExpression.Expression;

                if (expression != null &&
                    invocationExpression.ArgumentList != null)
                {
                    if (expression.IsKind(SyntaxKind.SimpleMemberAccessExpression) &&
                        ((MemberAccessExpressionSyntax)expression).Name?.Span.Contains(context.Span) == true)
                    {
                        if (context.IsRefactoringEnabled(RefactoringIdentifiers.UseElementAccessInsteadOfEnumerableMethod))
                        {
                            await UseElementAccessInsteadOfEnumerableMethodRefactoring.ComputeRefactoringsAsync(context, invocationExpression).ConfigureAwait(false);
                        }

                        if (context.IsRefactoringEnabled(RefactoringIdentifiers.ReplaceAnyWithAllOrAllWithAny))
                        {
                            await ReplaceAnyWithAllOrAllWithAnyRefactoring.ComputeRefactoringAsync(context, invocationExpression).ConfigureAwait(false);
                        }

                        if (context.IsRefactoringEnabled(RefactoringIdentifiers.ReplaceStringContainsWithStringIndexOf))
                        {
                            await ReplaceStringContainsWithStringIndexOfRefactoring.ComputeRefactoringAsync(context, invocationExpression).ConfigureAwait(false);
                        }
                    }

                    if (context.IsRefactoringEnabled(RefactoringIdentifiers.CallExtensionMethodAsInstanceMethod))
                    {
                        SyntaxNodeOrToken nodeOrToken = CallExtensionMethodAsInstanceMethodAnalysis.GetNodeOrToken(expression);

                        if (nodeOrToken.Span.Contains(context.Span))
                        {
                            SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);

                            CallExtensionMethodAsInstanceMethodAnalysisResult analysis = CallExtensionMethodAsInstanceMethodAnalysis.Analyze(invocationExpression, semanticModel, allowAnyExpression: true, cancellationToken: context.CancellationToken);

                            if (analysis.Success)
                            {
                                context.RegisterRefactoring(
                                    CallExtensionMethodAsInstanceMethodRefactoring.Title,
                                    cancellationToken =>
                                {
                                    return(context.Document.ReplaceNodeAsync(
                                               analysis.InvocationExpression,
                                               analysis.NewInvocationExpression,
                                               cancellationToken));
                                });
                            }
                        }
                    }
                }
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.ReplaceStringFormatWithInterpolatedString) &&
                context.SupportsCSharp6)
            {
                await ReplaceStringFormatWithInterpolatedStringRefactoring.ComputeRefactoringsAsync(context, invocationExpression).ConfigureAwait(false);
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.UseBitwiseOperationInsteadOfCallingHasFlag))
            {
                SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);

                if (UseBitwiseOperationInsteadOfCallingHasFlagAnalysis.IsFixable(invocationExpression, semanticModel, context.CancellationToken))
                {
                    context.RegisterRefactoring(
                        UseBitwiseOperationInsteadOfCallingHasFlagRefactoring.Title,
                        cancellationToken =>
                    {
                        return(UseBitwiseOperationInsteadOfCallingHasFlagRefactoring.RefactorAsync(
                                   context.Document,
                                   invocationExpression,
                                   cancellationToken));
                    });
                }
            }

            if (context.IsRefactoringEnabled(RefactoringIdentifiers.InlineMethod))
            {
                await InlineMethodRefactoring.ComputeRefactoringsAsync(context, invocationExpression).ConfigureAwait(false);
            }
        }