public void GetUniqueSymbolOrArities(out IArityEnumerable?arities, out TSymbol?uniqueSymbol)
{
if (this.HasUniqueSymbol)
{
arities = null;
#nullable disable // Can '_uniqueSymbolOrArities' be null? https://github.com/dotnet/roslyn/issues/39166
uniqueSymbol = (TSymbol)_uniqueSymbolOrArities;
#nullable enable
}
internal static ResultProperties GetResultProperties <TSymbol>(
this TSymbol?symbol,
DkmClrCompilationResultFlags flags,
bool isConstant
) where TSymbol : class, ISymbolInternal
{
var category =
(symbol != null)
? GetResultCategory(symbol.Kind)
: DkmEvaluationResultCategory.Data;
var accessType =
(symbol != null)
? GetResultAccessType(symbol.DeclaredAccessibility)
: DkmEvaluationResultAccessType.None;
var storageType =
(symbol != null) && symbol.IsStatic
? DkmEvaluationResultStorageType.Static
: DkmEvaluationResultStorageType.None;
var modifierFlags = DkmEvaluationResultTypeModifierFlags.None;
if (isConstant)
{
modifierFlags = DkmEvaluationResultTypeModifierFlags.Constant;
}
else if (symbol is null)
{
// No change.
}
else if (symbol.IsVirtual || symbol.IsAbstract || symbol.IsOverride)
{
modifierFlags = DkmEvaluationResultTypeModifierFlags.Virtual;
}
else if (symbol.Kind == SymbolKind.Field && ((IFieldSymbolInternal)symbol).IsVolatile)
{
modifierFlags = DkmEvaluationResultTypeModifierFlags.Volatile;
}
// CONSIDER: for completeness, we could check for [MethodImpl(MethodImplOptions.Synchronized)]
// and set DkmEvaluationResultTypeModifierFlags.Synchronized, but it doesn't seem to have any
// impact on the UI. It is exposed through the DTE, but cscompee didn't set the flag either.
return(new ResultProperties(flags, category, accessType, storageType, modifierFlags));
}
static TSymbol?TryGetSingleSymbol <TSymbol> (ImmutableArray <ISymbol> members) where TSymbol: class, ISymbol
{
TSymbol?candidate = null;
foreach (var m in members)
{
if (m is TSymbol tsym)
{
if (candidate is null)
{
candidate = tsym;
}
else
{
return(null);
}
}
}
return(candidate);
}
static void AddIfNotNull <TSymbol> (ImmutableArray <TSymbol> .Builder properties, TSymbol? p) where TSymbol: class, ISymbol
{
if (p != null)
{
properties.Add(p);
}
}
/// <summary>
/// Try getting the <see cref="ISymbol"/> for the node.
/// Gets the semantic model for the tree if the node is not in the tree corresponding to <paramref name="semanticModel"/>.
/// </summary>
/// <typeparam name="TSymbol">The symbol.</typeparam>
/// <param name="semanticModel">The <see cref="SemanticModel"/>.</param>
/// <param name="node">The <see cref="SyntaxNode"/>.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/>.</param>
/// <param name="symbol">The symbol if found.</param>
/// <returns>True if a symbol was found.</returns>
public static bool TryGetSymbol <TSymbol>(this SemanticModel semanticModel, SyntaxNode node, CancellationToken cancellationToken, [NotNullWhen(true)] out TSymbol?symbol)
where TSymbol : class, ISymbol
{
if (semanticModel is null)
{
throw new System.ArgumentNullException(nameof(semanticModel));
}
if (node is null)
{
throw new System.ArgumentNullException(nameof(node));
}
symbol = GetSymbolSafe(semanticModel, node, cancellationToken) as TSymbol ??
GetDeclaredSymbolSafe(semanticModel, node, cancellationToken) as TSymbol;
return(symbol != null);
}
protected abstract SymbolKeyResolution Resolve(SymbolKeyReader reader, TSymbol?contextualSymbol, out string?failureReason);