internal static Task <ImmutableArray <SymbolAndProjectId <INamedTypeSymbol> > > FindDerivedClassesAsync(
SymbolAndProjectId <INamedTypeSymbol> typeAndProjectId, Solution solution, IImmutableSet <Project> projects = null, CancellationToken cancellationToken = default)
{
var type = typeAndProjectId.Symbol;
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
if (solution == null)
{
throw new ArgumentNullException(nameof(solution));
}
return(DependentTypeFinder.FindTransitivelyDerivedClassesAsync(type, solution, projects, cancellationToken));
}
internal static async Task <ImmutableArray <SymbolAndProjectId> > FindImplementationsAsync(
SymbolAndProjectId symbolAndProjectId, Solution solution, IImmutableSet <Project> projects = null, CancellationToken cancellationToken = default)
{
// A symbol can only have implementations if it's an interface or a
// method/property/event from an interface.
var symbol = symbolAndProjectId.Symbol;
if (symbol is INamedTypeSymbol namedTypeSymbol)
{
var implementingTypes = await DependentTypeFinder.FindTransitivelyImplementingTypesAsync(namedTypeSymbol, solution, projects, cancellationToken).ConfigureAwait(false);
return(implementingTypes.Select(s => (SymbolAndProjectId)s)
.Where(IsAccessible)
.ToImmutableArray());
}
else if (symbol.IsImplementableMember())
{
var containingType = symbol.ContainingType.OriginalDefinition;
var allTypes = await DependentTypeFinder.FindTransitivelyImplementingTypesAsync(containingType, solution, projects, cancellationToken).ConfigureAwait(false);
ImmutableArray <SymbolAndProjectId> .Builder results = null;
foreach (var t in allTypes.Convert <INamedTypeSymbol, ITypeSymbol>())
{
foreach (var m in t.FindImplementationsForInterfaceMember(symbol, solution.Workspace, cancellationToken))
{
var sourceDef = await FindSourceDefinitionAsync(m, solution, cancellationToken).ConfigureAwait(false);
var bestDef = sourceDef.Symbol != null ? sourceDef : m;
if (IsAccessible(bestDef))
{
results = results ?? ImmutableArray.CreateBuilder <SymbolAndProjectId>();
results.Add(bestDef.WithSymbol(bestDef.Symbol.OriginalDefinition));
}
}
}
if (results != null)
{
return(results.Distinct(SymbolAndProjectIdComparer.SymbolEquivalenceInstance)
.ToImmutableArray());
}
}
return(ImmutableArray <SymbolAndProjectId> .Empty);
}
