private async Task <Document> ApplyRuleNameMultipleZeroAsync(Document document, INamedTypeSymbol enumType, CancellationToken cancellationToken)
{
// Diagnostic: Remove all members that have the value zero from '{0}' except for one member that is named 'None'.
// Fix: Remove all members that have the value zero except for one member that is named 'None'.
SymbolEditor editor = SymbolEditor.Create(document);
bool needsNewZeroValuedNoneField = true;
ISet <IFieldSymbol> set = EnumsShouldHaveZeroValueAnalyzer.GetZeroValuedFields(enumType).ToSet();
bool makeNextFieldExplicit = false;
foreach (IFieldSymbol field in enumType.GetMembers().Where(m => m.Kind == SymbolKind.Field))
{
bool isZeroValued = set.Contains(field);
bool isZeroValuedNamedNone = isZeroValued && EnumsShouldHaveZeroValueAnalyzer.IsMemberNamedNone(field);
if (!isZeroValued || isZeroValuedNamedNone)
{
if (makeNextFieldExplicit)
{
await editor.EditOneDeclarationAsync(field, (e, d) => e.ReplaceNode(d, GetExplicitlyAssignedField(field, d, e.Generator)), cancellationToken).ConfigureAwait(false);
makeNextFieldExplicit = false;
}
if (isZeroValuedNamedNone)
{
needsNewZeroValuedNoneField = false;
}
}
else
{
await editor.EditOneDeclarationAsync(field, (e, d) => e.RemoveNode(d), cancellationToken).ConfigureAwait(false); // removes the field declaration
makeNextFieldExplicit = true;
}
}
if (needsNewZeroValuedNoneField)
{
await editor.EditOneDeclarationAsync(enumType, (e, d) => e.InsertMembers(d, 0, new[] { e.Generator.EnumMember("None") }), cancellationToken).ConfigureAwait(false);
}
return(editor.GetChangedDocuments().First());
}
private async Task <Document> ApplyRuleNameNoZeroValueAsync(Document document, INamedTypeSymbol enumType, CancellationToken cancellationToken)
{
SymbolEditor editor = SymbolEditor.Create(document);
// remove any non-zero member named 'None'
foreach (IFieldSymbol field in enumType.GetMembers().Where(m => m.Kind == SymbolKind.Field))
{
if (EnumsShouldHaveZeroValueAnalyzer.IsMemberNamedNone(field))
{
await editor.EditOneDeclarationAsync(field, (e, d) => e.RemoveNode(d), cancellationToken).ConfigureAwait(false);
}
}
// insert zero-valued member 'None' to top
await editor.EditOneDeclarationAsync(enumType, (e, d) => e.InsertMembers(d, 0, new[] { e.Generator.EnumMember("None") }), cancellationToken).ConfigureAwait(false);
return(editor.GetChangedDocuments().First());
}