internal static async Task <ImmutableArray <ISymbol> > FindSymbolsAsync(
Project project,
SymbolFinderOptions options = null,
IFindSymbolsProgress progress = null,
CancellationToken cancellationToken = default)
{
Compilation compilation = await project.GetCompilationAsync(cancellationToken).ConfigureAwait(false);
INamedTypeSymbol generatedCodeAttribute = compilation.GetTypeByMetadataName("System.CodeDom.Compiler.GeneratedCodeAttribute");
ImmutableArray <ISymbol> .Builder symbols = null;
var namespaceOrTypeSymbols = new Stack <INamespaceOrTypeSymbol>();
namespaceOrTypeSymbols.Push(compilation.Assembly.GlobalNamespace);
while (namespaceOrTypeSymbols.Count > 0)
{
INamespaceOrTypeSymbol namespaceOrTypeSymbol = namespaceOrTypeSymbols.Pop();
foreach (ISymbol symbol in namespaceOrTypeSymbol.GetMembers())
{
SymbolKind kind = symbol.Kind;
if (kind == SymbolKind.Namespace)
{
var namespaceSymbol = (INamespaceSymbol)symbol;
SymbolFilterReason reason = options.GetReason(namespaceSymbol);
if (reason == SymbolFilterReason.None)
{
namespaceOrTypeSymbols.Push(namespaceSymbol);
}
continue;
}
bool isUnused = false;
if (!options.UnusedOnly ||
UnusedSymbolUtility.CanBeUnusedSymbol(symbol))
{
SymbolFilterReason reason = options.GetReason(symbol);
switch (reason)
{
case SymbolFilterReason.None:
{
if (options.IgnoreGeneratedCode &&
GeneratedCodeUtility.IsGeneratedCode(symbol, generatedCodeAttribute, MefWorkspaceServices.Default.GetService <ISyntaxFactsService>(compilation.Language).IsComment, cancellationToken))
{
continue;
}
if (options.UnusedOnly &&
!symbol.IsImplicitlyDeclared)
{
isUnused = await UnusedSymbolUtility.IsUnusedSymbolAsync(symbol, project.Solution, cancellationToken).ConfigureAwait(false);
}
if (!options.UnusedOnly ||
isUnused)
{
progress?.OnSymbolFound(symbol);
(symbols ?? (symbols = ImmutableArray.CreateBuilder <ISymbol>())).Add(symbol);
}
break;
}
case SymbolFilterReason.Visibility:
case SymbolFilterReason.WithoutAttibute:
case SymbolFilterReason.ImplicitlyDeclared:
{
continue;
}
case SymbolFilterReason.SymbolGroup:
case SymbolFilterReason.Ignored:
case SymbolFilterReason.WithAttibute:
case SymbolFilterReason.Other:
{
break;
}
default:
{
Debug.Fail(reason.ToString());
break;
}
}
}
if (!isUnused &&
kind == SymbolKind.NamedType)
{
namespaceOrTypeSymbols.Push((INamedTypeSymbol)symbol);
}
}
}
return(symbols?.ToImmutableArray() ?? ImmutableArray <ISymbol> .Empty);
}
