public static void Create(ISymbol symbol, SymbolKeyWriter visitor)
{
var containingSymbol = symbol.ContainingSymbol;
while (!containingSymbol.DeclaringSyntaxReferences.Any())
{
containingSymbol = containingSymbol.ContainingSymbol;
}
var kind = symbol.Kind;
var localName = symbol.Name;
Contract.ThrowIfNull(
visitor.Compilation,
message: $"visitor cannot be created with a null compilation and visit a {nameof(BodyLevelSymbolKey)}.");
var ordinal = 0;
foreach (var possibleSymbol in EnumerateSymbols(visitor.Compilation, containingSymbol, kind, localName, visitor.CancellationToken))
{
if (possibleSymbol.Item1.Equals(symbol))
{
ordinal = possibleSymbol.Item2;
break;
}
}
visitor.WriteString(localName);
visitor.WriteSymbolKey(containingSymbol);
visitor.WriteInteger(ordinal);
visitor.WriteInteger((int)kind);
}
// The containing symbol can be one of many things.
// 1) Null when this is the global namespace for a compilation.
// 2) The SymbolId for an assembly symbol if this is the global namespace for an
// assembly.
// 3) The SymbolId for a module symbol if this is the global namespace for a module.
// 4) The SymbolId for the containing namespace symbol if this is not a global
// namespace.
public static void Create(INamespaceSymbol symbol, SymbolKeyWriter visitor)
{
visitor.WriteString(symbol.MetadataName);
if (symbol.ContainingNamespace != null)
{
visitor.WriteBoolean(false);
visitor.WriteSymbolKey(symbol.ContainingNamespace);
}
else
{
// A global namespace can either belong to a module or to a compilation.
Debug.Assert(symbol.IsGlobalNamespace);
switch (symbol.NamespaceKind)
{
case NamespaceKind.Module:
visitor.WriteBoolean(false);
visitor.WriteSymbolKey(symbol.ContainingModule);
break;
case NamespaceKind.Assembly:
visitor.WriteBoolean(false);
visitor.WriteSymbolKey(symbol.ContainingAssembly);
break;
case NamespaceKind.Compilation:
visitor.WriteBoolean(true);
visitor.WriteSymbolKey(null);
break;
default:
throw new NotImplementedException();
}
}
}
public static void Create(IMethodSymbol symbol, SymbolKeyWriter visitor)
{
Debug.Assert(symbol.Equals(symbol.ConstructedFrom));
visitor.WriteString(symbol.MetadataName);
visitor.WriteSymbolKey(symbol.ContainingSymbol);
visitor.WriteInteger(symbol.Arity);
visitor.WriteBoolean(symbol.PartialDefinitionPart != null);
visitor.WriteRefKindArray(symbol.Parameters);
// Mark that we're writing out the signature of a method. This way if we hit a
// method type parameter in our parameter-list or return type, we won't recurse
// into it, but will instead only write out the type parameter ordinal. This
// happens with cases like Foo<T>(T t);
Debug.Assert(!visitor.WritingSignature);
visitor.WritingSignature = true;
visitor.WriteParameterTypesArray(symbol.OriginalDefinition.Parameters);
if (symbol.MethodKind == MethodKind.Conversion)
{
visitor.WriteSymbolKey(symbol.ReturnType);
}
else
{
visitor.WriteSymbolKey(null);
}
// Done writing the signature. Go back to normal mode.
Debug.Assert(visitor.WritingSignature);
visitor.WritingSignature = false;
}
public static void Create(IPropertySymbol symbol, SymbolKeyWriter visitor)
{
visitor.WriteString(symbol.MetadataName);
visitor.WriteSymbolKey(symbol.ContainingSymbol);
visitor.WriteBoolean(symbol.IsIndexer);
visitor.WriteRefKindArray(symbol.Parameters);
visitor.WriteParameterTypesArray(symbol.OriginalDefinition.Parameters);
}
public static void Create(INamedTypeSymbol symbol, SymbolKeyWriter visitor)
{
visitor.WriteString(symbol.Name);
visitor.WriteSymbolKey(symbol.ContainingSymbol as INamespaceOrTypeSymbol);
visitor.WriteInteger(symbol.Arity);
if (!symbol.Equals(symbol.ConstructedFrom))
{
visitor.WriteSymbolKeyArray(symbol.TypeArguments);
}
else
{
visitor.WriteSymbolKeyArray(default(ImmutableArray<ITypeSymbol>));
}
}
public static void Create(INamedTypeSymbol symbol, SymbolKeyWriter visitor)
{
visitor.WriteString(symbol.Name);
visitor.WriteSymbolKey(symbol.ContainingSymbol as INamespaceOrTypeSymbol);
visitor.WriteInteger(symbol.Arity);
if (!symbol.Equals(symbol.ConstructedFrom))
{
visitor.WriteSymbolKeyArray(symbol.TypeArguments);
}
else
{
visitor.WriteSymbolKeyArray(default(ImmutableArray <ITypeSymbol>));
}
}
public static void Create(INamedTypeSymbol symbol, SymbolKeyWriter visitor)
{
visitor.WriteString(symbol.MetadataName);
visitor.WriteSymbolKey(symbol.ContainingSymbol);
visitor.WriteInteger(symbol.Arity);
visitor.WriteBoolean(symbol.IsUnboundGenericType);
if (!symbol.Equals(symbol.ConstructedFrom) && !symbol.IsUnboundGenericType)
{
visitor.WriteSymbolKeyArray(symbol.TypeArguments);
}
else
{
visitor.WriteSymbolKeyArray(ImmutableArray <ITypeSymbol> .Empty);
}
}
public static void Create(INamedTypeSymbol symbol, SymbolKeyWriter visitor)
{
visitor.WriteString(symbol.MetadataName);
visitor.WriteSymbolKey(symbol.ContainingSymbol);
visitor.WriteInteger(symbol.Arity);
visitor.WriteInteger((int)symbol.TypeKind);
visitor.WriteBoolean(symbol.IsUnboundGenericType);
if (!symbol.Equals(symbol.ConstructedFrom) && !symbol.IsUnboundGenericType)
{
visitor.WriteSymbolKeyArray(symbol.TypeArguments);
}
else
{
visitor.WriteSymbolKeyArray(default(ImmutableArray<ITypeSymbol>));
}
}
public static void Create(ISymbol symbol, SymbolKeyWriter visitor)
{
var containingSymbol = symbol.ContainingSymbol;
while (containingSymbol.DeclaringSyntaxReferences.IsDefaultOrEmpty)
{
containingSymbol = containingSymbol.ContainingSymbol;
}
var compilation = ((ISourceAssemblySymbol)symbol.ContainingAssembly).Compilation;
var kind = symbol.Kind;
var localName = symbol.Name;
// Use two mechanisms to try to find the symbol across compilations. First, we use a whitespace
// insensitive system where we keep track of the list of all locals in the container and we just store
// our index in it.
//
// The above works for cases where the symbol has a real declaration and can be found by walking the
// declarations of the container. However, not all symbols can be found that way. For example, error
// locals in VB can't be found using GetDeclaredSymbol. For those, we store the actual local span and
// use GetSymbolInfo to find it.
var ordinal = GetOrdinal();
visitor.WriteString(localName);
visitor.WriteSymbolKey(containingSymbol);
visitor.WriteInteger(ordinal);
visitor.WriteLocation(symbol.Locations[0]);
visitor.WriteInteger((int)kind);
return;
int GetOrdinal()
{
foreach (var possibleSymbol in EnumerateSymbols(compilation, containingSymbol, kind, localName, visitor.CancellationToken))
{
if (possibleSymbol.symbol.Equals(symbol))
{
return(possibleSymbol.ordinal);
}
}
return(int.MaxValue);
}
}
public static void Create(INamedTypeSymbol symbol, SymbolKeyWriter visitor)
{
visitor.WriteString(symbol.Name);
switch (symbol.ContainingSymbol)
{
case INamedTypeSymbol parentType:
visitor.WriteInteger(0);
visitor.WriteSymbolKey(parentType);
break;
case INamespaceSymbol parentNamespace:
visitor.WriteInteger(1);
visitor.WriteStringArray(
GetContainingNamespaceNamesInReverse(parentNamespace)
);
break;
default:
visitor.WriteInteger(2);
break;
}
var isConstructed = !symbol.Equals(symbol.ConstructedFrom);
visitor.WriteInteger(symbol.Arity);
visitor.WriteBoolean(isConstructed);
if (isConstructed)
{
visitor.WriteSymbolKeyArray(symbol.TypeArguments);
}
else
{
visitor.WriteSymbolKeyArray(ImmutableArray <ITypeSymbol> .Empty);
}
}
public static void Create(IAssemblySymbol symbol, SymbolKeyWriter visitor)
{
// If the format of this ever changed, then it's necessary to fixup the
// SymbolKeyComparer.RemoveAssemblyKeys function.
visitor.WriteString(symbol.Identity.Name);
}
public static void Create(IAssemblySymbol symbol, SymbolKeyWriter visitor)
{
// If the format of this ever changed, then it's necessary to fixup the
// SymbolKeyComparer.RemoveAssemblyKeys function.
visitor.WriteString(symbol.Identity.Name);
}
public static void Create(IParameterSymbol symbol, SymbolKeyWriter visitor)
{
visitor.WriteString(symbol.MetadataName);
visitor.WriteSymbolKey(symbol.ContainingSymbol);
}
public static void Create(IEventSymbol symbol, SymbolKeyWriter visitor)
{
visitor.WriteString(symbol.MetadataName);
visitor.WriteSymbolKey(symbol.ContainingType);
}
public static void Create(IEventSymbol symbol, SymbolKeyWriter visitor)
{
visitor.WriteString(symbol.MetadataName);
visitor.WriteSymbolKey(symbol.ContainingType);
}
public sealed override void Create(IAliasSymbol symbol, SymbolKeyWriter visitor)
{
visitor.WriteString(symbol.Name);
visitor.WriteSymbolKey(symbol.Target);
visitor.WriteString(symbol.DeclaringSyntaxReferences.FirstOrDefault()?.SyntaxTree.FilePath ?? "");
}
public static void Create(ISymbol symbol, SymbolKeyWriter visitor)
{
// Store the body level symbol in two forms. The first, a highly precise form that should find explicit
// symbols for the case of resolving a symbol key back in the *same* solution snapshot it was created
// from. The second, in a more query-oriented form that can allow the symbol to be found in some cases
// even if the solution changed (which is a supported use case for SymbolKey).
//
// The first way just stores the location of the symbol, which we can then validate during resolution
// maps back to the same symbol kind/name.
//
// The second determines the sequence of symbols of the same kind and same name in the file and keeps
// track of our index in that sequence. That way, if trivial edits happen, or symbols with different
// names/types are added/removed, we can still find what is likely to be this symbol after the edit.
var kind = symbol.Kind;
var localName = symbol.Name;
visitor.WriteString(localName);
visitor.WriteInteger((int)kind);
// write out the locations for precision
Contract.ThrowIfTrue(
symbol.DeclaringSyntaxReferences.IsEmpty && symbol.Locations.IsEmpty
);
var locations = GetBodyLevelSourceLocations(symbol, visitor.CancellationToken);
Contract.ThrowIfFalse(locations.All(loc => loc.IsInSource));
visitor.WriteLocationArray(locations.Distinct());
// and the ordinal for resilience
visitor.WriteInteger(GetOrdinal());
return;
int GetOrdinal()
{
var syntaxTree = locations[0].SourceTree;
var compilation =
((ISourceAssemblySymbol)symbol.ContainingAssembly).Compilation;
// 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.
if (TryGetSemanticModel(compilation, syntaxTree, out var semanticModel))
{
foreach (
var possibleSymbol in EnumerateSymbols(
semanticModel,
kind,
localName,
visitor.CancellationToken
)
)
{
if (possibleSymbol.symbol.Equals(symbol))
{
return(possibleSymbol.ordinal);
}
}
}
return(int.MaxValue);
}
}
public static void Create(IParameterSymbol symbol, SymbolKeyWriter visitor)
{
visitor.WriteString(symbol.MetadataName);
visitor.WriteSymbolKey(symbol.ContainingSymbol);
}
public static void Create(IAliasSymbol symbol, SymbolKeyWriter visitor)
{
visitor.WriteString(symbol.Name);
visitor.WriteSymbolKey(symbol.Target);
visitor.WriteString(symbol.DeclaringSyntaxReferences.FirstOrDefault()?.SyntaxTree.FilePath ?? "");
}
public sealed override void Create(IFieldSymbol symbol, SymbolKeyWriter visitor)
{
visitor.WriteString(symbol.MetadataName);
visitor.WriteSymbolKey(symbol.ContainingType);
}