private static IDocument GetOrCreateBackingField(this IDocument document, SyntaxAnnotation propertyAnnotation, out IFieldSymbol backingField)
{
var semanticModel = document.GetSemanticModel();
var property = document.GetAnnotatedNode <PropertyDeclarationSyntax>(propertyAnnotation);
var propertySymbol = (IPropertySymbol)semanticModel.GetDeclaredSymbol(property);
var getter = property.AccessorList.Accessors.First(a => a.Kind == SyntaxKind.GetAccessorDeclaration);
if (getter.Body == null)
{
// When the getter doesn't have a body (i.e. an auto-prop), we'll need to generate a new field.
var newField = SymbolFactory.CreateField(
attributes: null,
accessibility: CommonAccessibility.Private,
modifiers: new SymbolModifiers(),
type: propertySymbol.Type,
name: GenerateFieldName(property, semanticModel));
var codeGenResult = newField.AddFieldTo(propertySymbol.ContainingType, document.Project.Solution);
document = codeGenResult;
semanticModel = document.GetSemanticModel();
property = document.GetAnnotatedNode <PropertyDeclarationSyntax>(propertyAnnotation);
propertySymbol = (IPropertySymbol)semanticModel.GetDeclaredSymbol(property);
backingField = (IFieldSymbol)propertySymbol.ContainingType.GetMembers(newField.Name).Single();
return(document);
}
else
{
backingField = GetBackingFieldFromGetter(getter, semanticModel);
return(document);
}
}
