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);
}
