public override object VisitMethod(IMethodSymbol methodSymbol)
{
if (!methodSymbol.Equals(methodSymbol.ConstructedFrom))
{
WriteType(SymbolKeyType.ConstructedMethod);
ConstructedMethodSymbolKey.Create(methodSymbol, this);
}
else
{
switch (methodSymbol.MethodKind)
{
case MethodKind.ReducedExtension:
WriteType(SymbolKeyType.ReducedExtensionMethod);
ReducedExtensionMethodSymbolKey.Create(methodSymbol, this);
break;
case MethodKind.AnonymousFunction:
WriteType(SymbolKeyType.AnonymousFunctionOrDelegate);
AnonymousFunctionOrDelegateSymbolKey.Create(methodSymbol, this);
break;
case MethodKind.LocalFunction:
WriteType(SymbolKeyType.BodyLevel);
BodyLevelSymbolKey.Create(methodSymbol, this);
break;
default:
WriteType(SymbolKeyType.Method);
MethodSymbolKey.Create(methodSymbol, this);
break;
}
}
return(null);
}
private SymbolKeyResolution ReadWorker(SymbolKeyType type)
{
switch (type)
{
case SymbolKeyType.Alias: return(AliasSymbolKey.Resolve(this));
case SymbolKeyType.BodyLevel: return(BodyLevelSymbolKey.Resolve(this));
case SymbolKeyType.ConstructedMethod: return(ConstructedMethodSymbolKey.Resolve(this));
case SymbolKeyType.NamedType: return(NamedTypeSymbolKey.Resolve(this));
case SymbolKeyType.ErrorType: return(ErrorTypeSymbolKey.Resolve(this));
case SymbolKeyType.Field: return(FieldSymbolKey.Resolve(this));
case SymbolKeyType.DynamicType: return(DynamicTypeSymbolKey.Resolve(this));
case SymbolKeyType.Method: return(MethodSymbolKey.Resolve(this));
case SymbolKeyType.Namespace: return(NamespaceSymbolKey.Resolve(this));
case SymbolKeyType.PointerType: return(PointerTypeSymbolKey.Resolve(this));
case SymbolKeyType.Parameter: return(ParameterSymbolKey.Resolve(this));
case SymbolKeyType.Property: return(PropertySymbolKey.Resolve(this));
case SymbolKeyType.ArrayType: return(ArrayTypeSymbolKey.Resolve(this));
case SymbolKeyType.Assembly: return(AssemblySymbolKey.Resolve(this));
case SymbolKeyType.TupleType: return(TupleTypeSymbolKey.Resolve(this));
case SymbolKeyType.Module: return(ModuleSymbolKey.Resolve(this));
case SymbolKeyType.Event: return(EventSymbolKey.Resolve(this));
case SymbolKeyType.ReducedExtensionMethod: return(ReducedExtensionMethodSymbolKey.Resolve(this));
case SymbolKeyType.TypeParameter: return(TypeParameterSymbolKey.Resolve(this));
case SymbolKeyType.AnonymousType: return(AnonymousTypeSymbolKey.Resolve(this));
case SymbolKeyType.AnonymousFunctionOrDelegate: return(AnonymousFunctionOrDelegateSymbolKey.Resolve(this));
case SymbolKeyType.TypeParameterOrdinal: return(TypeParameterOrdinalSymbolKey.Resolve(this));
}
throw new NotImplementedException();
}
protected override int ReadWorker(SymbolKeyType type)
{
switch (type)
{
case SymbolKeyType.Alias: return(AliasSymbolKey.GetHashCode(this));
case SymbolKeyType.BodyLevel: return(BodyLevelSymbolKey.GetHashCode(this));
case SymbolKeyType.ConstructedMethod: return(ConstructedMethodSymbolKey.GetHashCode(this));
case SymbolKeyType.NamedType: return(NamedTypeSymbolKey.GetHashCode(this));
case SymbolKeyType.ErrorType: return(ErrorTypeSymbolKey.GetHashCode(this));
case SymbolKeyType.Field: return(FieldSymbolKey.GetHashCode(this));
case SymbolKeyType.DynamicType: return(DynamicTypeSymbolKey.GetHashCode(this));
case SymbolKeyType.Method: return(MethodSymbolKey.GetHashCode(this));
case SymbolKeyType.Namespace: return(NamespaceSymbolKey.GetHashCode(this));
case SymbolKeyType.PointerType: return(PointerTypeSymbolKey.GetHashCode(this));
case SymbolKeyType.Parameter: return(ParameterSymbolKey.GetHashCode(this));
case SymbolKeyType.Property: return(PropertySymbolKey.GetHashCode(this));
case SymbolKeyType.ArrayType: return(ArrayTypeSymbolKey.GetHashCode(this));
case SymbolKeyType.Assembly: return(AssemblySymbolKey.GetHashCode(this));
case SymbolKeyType.TupleType: return(TupleTypeSymbolKey.GetHashCode(this));
case SymbolKeyType.Module: return(ModuleSymbolKey.GetHashCode(this));
case SymbolKeyType.Event: return(EventSymbolKey.GetHashCode(this));
case SymbolKeyType.ReducedExtensionMethod: return(ReducedExtensionMethodSymbolKey.GetHashCode(this));
case SymbolKeyType.TypeParameter: return(TypeParameterSymbolKey.GetHashCode(this));
case SymbolKeyType.TypeParameterOrdinal: return(TypeParameterOrdinalSymbolKey.GetHashCode(this));
}
throw new NotImplementedException();
}
public static bool CanCreate(ISymbol symbol, CancellationToken cancellationToken)
{
if (BodyLevelSymbolKey.IsBodyLevelSymbol(symbol))
{
var locations = BodyLevelSymbolKey.GetBodyLevelSourceLocations(symbol, cancellationToken);
if (locations.Length == 0)
{
return(false);
}
// Ensure that the tree we're looking at is actually in this compilation. It may not be in the
// compilation in the case of work done with a speculative model.
var compilation = ((ISourceAssemblySymbol)symbol.ContainingAssembly).Compilation;
return(compilation.SyntaxTrees.Contains(locations.First().SourceTree));
}
return(true);
}
public override object VisitRangeVariable(IRangeVariableSymbol rangeVariableSymbol)
{
WriteType(SymbolKeyType.BodyLevel);
BodyLevelSymbolKey.Create(rangeVariableSymbol, this);
return(null);
}
public override object VisitLocal(ILocalSymbol localSymbol)
{
WriteType(SymbolKeyType.BodyLevel);
BodyLevelSymbolKey.Create(localSymbol, this);
return(null);
}
internal void WriteSymbolKey(ISymbol?symbol)
{
WriteSpace();
if (symbol == null)
{
WriteType(SymbolKeyType.Null);
return;
}
int id;
var shouldWriteOrdinal = ShouldWriteTypeParameterOrdinal(symbol, out _);
if (!shouldWriteOrdinal)
{
if (_symbolToId.TryGetValue(symbol, out id))
{
StartKey();
WriteType(SymbolKeyType.Reference);
WriteInteger(id);
EndKey();
return;
}
}
id = _nextId;
_nextId++;
StartKey();
if (IsBodyLevelSymbol(symbol))
{
WriteType(SymbolKeyType.BodyLevel);
BodyLevelSymbolKey.Create(symbol, this);
}
else
{
symbol.Accept(this);
}
if (!shouldWriteOrdinal)
{
// Note: it is possible in some situations to hit the same symbol
// multiple times. For example, if you have:
//
// Goo<Z>(List<Z> list)
//
// If we start with the symbol for "list" then we'll see the following
// chain of symbols hit:
//
// List<Z>
// Z
// Goo<Z>(List<Z>)
// List<Z>
//
// The recursion is prevented because when we hit 'Goo' we mark that
// we're writing out a signature. And, in signature mode we only write
// out the ordinal for 'Z' without recursing. However, even though
// we prevent the recursion, we still hit List<Z> twice. After writing
// the innermost one out, we'll give it a reference ID. When we
// then hit the outermost one, we want to just reuse that one.
if (_symbolToId.TryGetValue(symbol, out var existingId))
{
// While we recursed, we already hit this symbol. Use its ID as our
// ID.
id = existingId;
}
else
{
// Haven't hit this symbol before, write out its fresh ID.
_symbolToId.Add(symbol, id);
}
}
// Now write out the ID for this symbol so that any future hits of it can
// write out a reference to it instead.
WriteInteger(id);
EndKey();
}