private static AccessorDeclarationSyntax UseExpressionBodyIfDesired( Workspace workspace, AccessorDeclarationSyntax declaration, ParseOptions options) { if (declaration.ExpressionBody == null) { var preferExpressionBody = workspace.Options.GetOption(CSharpCodeStyleOptions.PreferExpressionBodiedAccessors).Value; if (preferExpressionBody) { var expressionBody = declaration.Body.TryConvertToExpressionBody(options); if (expressionBody != null) { declaration = declaration.WithBody(null) .WithExpressionBody(expressionBody) .WithSemicolonToken(SyntaxFactory.Token(SyntaxKind.SemicolonToken)); } } } return declaration; }
/// <summary> /// Normalizes the <paramref name="accessor" />. /// </summary> public override SyntaxNode VisitAccessorDeclaration(AccessorDeclarationSyntax accessor) { var originalAccessor = accessor; var methodSymbol = accessor.GetMethodSymbol(SemanticModel); if (!methodSymbol.ContainingType.IsFaultEffect(SemanticModel) || !methodSymbol.IsOverride) return accessor; SyntaxNode baseExpression; if (((IPropertySymbol)methodSymbol.AssociatedSymbol).IsIndexer) { var parameterCount = methodSymbol.Parameters.Length - (accessor.Kind() != SyntaxKind.GetAccessorDeclaration ? 1 : 0); var parameters = methodSymbol.Parameters.Take(parameterCount); baseExpression = Syntax.ElementAccessExpression(Syntax.BaseExpression(), CreateInvocationArguments(parameters)); } else baseExpression = Syntax.MemberAccessExpression(Syntax.BaseExpression(), methodSymbol.GetPropertySymbol().Name); if (accessor.Kind() != SyntaxKind.GetAccessorDeclaration) baseExpression = Syntax.AssignmentStatement(baseExpression, Syntax.IdentifierName("value")); accessor = accessor.WithBody(CreateBody(methodSymbol, accessor.Body, baseExpression)); return accessor.EnsureLineCount(originalAccessor); }