private static async Task AddImplicitConflictsAsync(
ISymbol renamedSymbol,
ISymbol originalSymbol,
IEnumerable <ReferenceLocation> implicitReferenceLocations,
SemanticModel semanticModel,
Location originalDeclarationLocation,
int newDeclarationLocationStartingPosition,
MutableConflictResolution conflictResolution,
CancellationToken cancellationToken)
{
{
var renameRewriterService =
conflictResolution.CurrentSolution.Workspace.Services.GetLanguageServices(renamedSymbol.Language)
.GetRequiredService <IRenameRewriterLanguageService>();
var implicitUsageConflicts = renameRewriterService.ComputePossibleImplicitUsageConflicts(renamedSymbol, semanticModel, originalDeclarationLocation, newDeclarationLocationStartingPosition, cancellationToken);
foreach (var implicitUsageConflict in implicitUsageConflicts)
{
Contract.ThrowIfNull(implicitUsageConflict.SourceTree);
conflictResolution.AddOrReplaceRelatedLocation(new RelatedLocation(
implicitUsageConflict.SourceSpan, conflictResolution.OldSolution.GetRequiredDocument(implicitUsageConflict.SourceTree).Id, RelatedLocationType.UnresolvableConflict));
}
}
if (implicitReferenceLocations.IsEmpty())
{
return;
}
foreach (var implicitReferenceLocationsPerLanguage in implicitReferenceLocations.GroupBy(loc => loc.Document.Project.Language))
{
// the location of the implicit reference defines the language rules to check.
// E.g. foreach in C# using a MoveNext in VB that is renamed to MOVENEXT (within VB)
var renameRewriterService = implicitReferenceLocationsPerLanguage.First().Document.Project.LanguageServices.GetRequiredService <IRenameRewriterLanguageService>();
var implicitConflicts = await renameRewriterService.ComputeImplicitReferenceConflictsAsync(
originalSymbol,
renamedSymbol,
implicitReferenceLocationsPerLanguage,
cancellationToken).ConfigureAwait(false);
foreach (var implicitConflict in implicitConflicts)
{
Contract.ThrowIfNull(implicitConflict.SourceTree);
conflictResolution.AddRelatedLocation(new RelatedLocation(
implicitConflict.SourceSpan, conflictResolution.OldSolution.GetRequiredDocument(implicitConflict.SourceTree).Id, RelatedLocationType.UnresolvableConflict));
}
}
}
private static void AddConflictingSymbolLocations(IEnumerable <ISymbol> conflictingSymbols, MutableConflictResolution conflictResolution, IDictionary <Location, Location> reverseMappedLocations)
{
foreach (var newSymbol in conflictingSymbols)
{
foreach (var newLocation in newSymbol.Locations)
{
if (newLocation.IsInSource)
{
if (reverseMappedLocations.TryGetValue(newLocation, out var oldLocation))
{
conflictResolution.AddOrReplaceRelatedLocation(new RelatedLocation(oldLocation.SourceSpan, conflictResolution.OldSolution.GetDocument(oldLocation.SourceTree).Id, RelatedLocationType.UnresolvableConflict));
}
}
}
}
}
/// <summary>
/// Computes an adds conflicts relating to declarations, which are independent of
/// location-based checks. Examples of these types of conflicts include renaming a member to
/// the same name as another member of a type: binding doesn't change (at least from the
/// perspective of find all references), but we still need to track it.
/// </summary>
private static async Task AddDeclarationConflictsAsync(
ISymbol renamedSymbol,
ISymbol renameSymbol,
IEnumerable <ISymbol> referencedSymbols,
MutableConflictResolution conflictResolution,
IDictionary <Location, Location> reverseMappedLocations,
CancellationToken cancellationToken)
{
try
{
var project = conflictResolution.CurrentSolution.GetProject(renamedSymbol.ContainingAssembly, cancellationToken);
if (renamedSymbol.ContainingSymbol.IsKind(SymbolKind.NamedType))
{
var otherThingsNamedTheSame = renamedSymbol.ContainingType.GetMembers(renamedSymbol.Name)
.Where(s => !s.Equals(renamedSymbol) &&
string.Equals(s.MetadataName, renamedSymbol.MetadataName, StringComparison.Ordinal));
IEnumerable <ISymbol> otherThingsNamedTheSameExcludeMethodAndParameterizedProperty;
// Possibly overloaded symbols are excluded here and handled elsewhere
var semanticFactsService = project.LanguageServices.GetService <ISemanticFactsService>();
if (semanticFactsService.SupportsParameterizedProperties)
{
otherThingsNamedTheSameExcludeMethodAndParameterizedProperty = otherThingsNamedTheSame
.Where(s => !s.MatchesKind(SymbolKind.Method, SymbolKind.Property) ||
!renamedSymbol.MatchesKind(SymbolKind.Method, SymbolKind.Property));
}
else
{
otherThingsNamedTheSameExcludeMethodAndParameterizedProperty = otherThingsNamedTheSame
.Where(s => s.Kind != SymbolKind.Method || renamedSymbol.Kind != SymbolKind.Method);
}
AddConflictingSymbolLocations(otherThingsNamedTheSameExcludeMethodAndParameterizedProperty, conflictResolution, reverseMappedLocations);
}
if (renamedSymbol.IsKind(SymbolKind.Namespace) && renamedSymbol.ContainingSymbol.IsKind(SymbolKind.Namespace))
{
var otherThingsNamedTheSame = ((INamespaceSymbol)renamedSymbol.ContainingSymbol).GetMembers(renamedSymbol.Name)
.Where(s => !s.Equals(renamedSymbol) &&
!s.IsKind(SymbolKind.Namespace) &&
string.Equals(s.MetadataName, renamedSymbol.MetadataName, StringComparison.Ordinal));
AddConflictingSymbolLocations(otherThingsNamedTheSame, conflictResolution, reverseMappedLocations);
}
if (renamedSymbol.IsKind(SymbolKind.NamedType) && renamedSymbol.ContainingSymbol is INamespaceOrTypeSymbol)
{
var otherThingsNamedTheSame = ((INamespaceOrTypeSymbol)renamedSymbol.ContainingSymbol).GetMembers(renamedSymbol.Name)
.Where(s => !s.Equals(renamedSymbol) &&
string.Equals(s.MetadataName, renamedSymbol.MetadataName, StringComparison.Ordinal));
var conflictingSymbolLocations = otherThingsNamedTheSame.Where(s => !s.IsKind(SymbolKind.Namespace));
if (otherThingsNamedTheSame.Any(s => s.IsKind(SymbolKind.Namespace)))
{
conflictingSymbolLocations = conflictingSymbolLocations.Concat(renamedSymbol);
}
AddConflictingSymbolLocations(conflictingSymbolLocations, conflictResolution, reverseMappedLocations);
}
// Some types of symbols (namespaces, cref stuff, etc) might not have ContainingAssemblies
if (renamedSymbol.ContainingAssembly != null)
{
// There also might be language specific rules we need to include
var languageRenameService = project.LanguageServices.GetService <IRenameRewriterLanguageService>();
var languageConflicts = await languageRenameService.ComputeDeclarationConflictsAsync(
conflictResolution.ReplacementText,
renamedSymbol,
renameSymbol,
referencedSymbols,
conflictResolution.OldSolution,
conflictResolution.CurrentSolution,
reverseMappedLocations,
cancellationToken).ConfigureAwait(false);
foreach (var languageConflict in languageConflicts)
{
conflictResolution.AddOrReplaceRelatedLocation(new RelatedLocation(languageConflict.SourceSpan, conflictResolution.OldSolution.GetDocument(languageConflict.SourceTree).Id, RelatedLocationType.UnresolvableConflict));
}
}
}
catch (Exception e) when(FatalError.ReportUnlessCanceled(e))
{
// A NullReferenceException is happening in this method, but the dumps do not
// contain information about this stack frame because this method is async and
// therefore the exception filter in IdentifyConflictsAsync is insufficient.
// See https://devdiv.visualstudio.com/DevDiv/_workitems?_a=edit&id=378642
throw ExceptionUtilities.Unreachable;
}
}
private static bool IsRenameValid(MutableConflictResolution conflictResolution, ISymbol renamedSymbol)
{
// if we rename an identifier and it now binds to a symbol from metadata this should be treated as
// an invalid rename.
return(conflictResolution.ReplacementTextValid && renamedSymbol != null && renamedSymbol.Locations.Any(loc => loc.IsInSource));
}