internal override NamedTypeSymbol TryLookupForwardedMetadataTypeWithCycleDetection(ref MetadataTypeName emittedName, ConsList <AssemblySymbol> visitedAssemblies)
{
int forcedArity = emittedName.ForcedArity;
if (emittedName.UseCLSCompliantNameArityEncoding)
{
if (forcedArity == -1)
{
forcedArity = emittedName.InferredArity;
}
else if (forcedArity != emittedName.InferredArity)
{
return(null);
}
Debug.Assert(forcedArity == emittedName.InferredArity);
}
//if (_lazyForwardedTypesFromSource == null)
//{
// IDictionary<string, NamedTypeSymbol> forwardedTypesFromSource;
// CommonAssemblyWellKnownAttributeData<NamedTypeSymbol> wellKnownAttributeData = GetSourceDecodedWellKnownAttributeData();
// if (wellKnownAttributeData != null && wellKnownAttributeData.ForwardedTypes != null)
// {
// forwardedTypesFromSource = new Dictionary<string, NamedTypeSymbol>();
// foreach (NamedTypeSymbol forwardedType in wellKnownAttributeData.ForwardedTypes)
// {
// NamedTypeSymbol originalDefinition = forwardedType.OriginalDefinition;
// Debug.Assert((object)originalDefinition.ContainingType == null, "How did a nested type get forwarded?");
// string fullEmittedName = MetadataHelpers.BuildQualifiedName(originalDefinition.ContainingSymbol.ToDisplayString(SymbolDisplayFormat.QualifiedNameOnlyFormat),
// originalDefinition.MetadataName);
// // Since we need to allow multiple constructions of the same generic type at the source
// // level, we need to de-dup the original definitions.
// forwardedTypesFromSource[fullEmittedName] = originalDefinition;
// }
// }
// else
// {
// forwardedTypesFromSource = SpecializedCollections.EmptyDictionary<string, NamedTypeSymbol>();
// }
// _lazyForwardedTypesFromSource = forwardedTypesFromSource;
//}
//NamedTypeSymbol result;
//if (_lazyForwardedTypesFromSource.TryGetValue(emittedName.FullName, out result))
//{
// if ((forcedArity == -1 || result.Arity == forcedArity) &&
// (!emittedName.UseCLSCompliantNameArityEncoding || result.Arity == 0 || result.MangleName))
// {
// return result;
// }
//}
//else if (!_compilation.Options.OutputKind.IsNetModule())
//{
// // See if any of added modules forward the type.
// // Similar to attributes, type forwarders from the second added module should override type forwarders from the first added module, etc.
// for (int i = _modules.Length - 1; i > 0; i--)
// {
// var peModuleSymbol = (Metadata.PE.PEModuleSymbol)_modules[i];
// var forwardedToAssembly = peModuleSymbol.GetAssemblyForForwardedType(ref emittedName);
// if ((object)forwardedToAssembly != null)
// {
// // Don't bother to check the forwarded-to assembly if we've already seen it.
// if (visitedAssemblies != null && visitedAssemblies.Contains(forwardedToAssembly))
// {
// return CreateCycleInTypeForwarderErrorTypeSymbol(ref emittedName);
// }
// else
// {
// visitedAssemblies = new ConsList<AssemblySymbol>(this, visitedAssemblies ?? ConsList<AssemblySymbol>.Empty);
// return forwardedToAssembly.LookupTopLevelMetadataTypeWithCycleDetection(ref emittedName, visitedAssemblies, digThroughForwardedTypes: true);
// }
// }
// }
//}
return(null);
}
internal override NamedTypeSymbol LookupTopLevelMetadataType(ref MetadataTypeName emittedName)
{
return new MissingMetadataTypeSymbol.TopLevel(this, ref emittedName);
}
/// <summary>
/// If this module forwards the given type to another assembly, return that assembly;
/// otherwise, return null.
/// </summary>
/// <param name="fullName">Type to look up.</param>
/// <returns>Assembly symbol or null.</returns>
/// <remarks>
/// The returned assembly may also forward the type.
/// </remarks>
internal AssemblySymbol GetAssemblyForForwardedType(ref MetadataTypeName fullName)
{
string matchedName;
AssemblyReferenceHandle assemblyRef = Module.GetAssemblyForForwardedType(fullName.FullName, ignoreCase: false, matchedName: out matchedName);
return assemblyRef.IsNil ? null : this.GetReferencedAssemblySymbol(assemblyRef);
}
public Nested(NamedTypeSymbol containingType, ref MetadataTypeName emittedName)
: this(containingType, ref emittedName, emittedName.ForcedArity == -1 || emittedName.ForcedArity == emittedName.InferredArity)
{
}
internal NamedTypeSymbol LookupMetadataType(ref MetadataTypeName emittedTypeName, out bool isNoPiaLocalType)
{
NamedTypeSymbol result = LookupMetadataType(ref emittedTypeName);
isNoPiaLocalType = false;
if (result is MissingMetadataTypeSymbol)
{
EnsureAllMembersLoaded();
TypeDefinitionHandle typeDef;
// See if this is a NoPia local type, which we should unify.
// Note, VB should use FullName.
if (_lazyNoPiaLocalTypes != null && _lazyNoPiaLocalTypes.TryGetValue(emittedTypeName.TypeName, out typeDef))
{
result = (NamedTypeSymbol)new MetadataDecoder(ContainingPEModule).GetTypeOfToken(typeDef, out isNoPiaLocalType);
Debug.Assert(isNoPiaLocalType);
}
}
return result;
}
internal override NamedTypeSymbol LookupTopLevelMetadataTypeWithCycleDetection(ref MetadataTypeName emittedName, ConsList<AssemblySymbol> visitedAssemblies, bool digThroughForwardedTypes)
{
var result = this.moduleSymbol.LookupTopLevelMetadataType(ref emittedName);
Debug.Assert(result is MissingMetadataTypeSymbol);
return result;
}
public TopLevel(ModuleSymbol module, ref MetadataTypeName fullName, WellKnownType wellKnownType)
: this(module, ref fullName, (int)wellKnownType)
{
}
/// <summary>
/// This method handles duplicate types in a few different ways:
/// - for types before C# 7, the first candidate is returned with a warning
/// - for types after C# 7, the type is considered missing
/// - in both cases, when BinderFlags.IgnoreCorLibraryDuplicatedTypes is set, any duplicate coming from corlib will be ignored (ie not count as a duplicate)
/// </summary>
internal NamedTypeSymbol GetWellKnownType(WellKnownType type)
{
Debug.Assert(type.IsValid());
bool ignoreCorLibraryDuplicatedTypes = this.Options.TopLevelBinderFlags.Includes(BinderFlags.IgnoreCorLibraryDuplicatedTypes);
int index = (int)type - (int)WellKnownType.First;
if (_lazyWellKnownTypes == null || (object)_lazyWellKnownTypes[index] == null)
{
if (_lazyWellKnownTypes == null)
{
Interlocked.CompareExchange(ref _lazyWellKnownTypes, new NamedTypeSymbol[(int)WellKnownTypes.Count], null);
}
string mdName = type.GetMetadataName();
var warnings = DiagnosticBag.GetInstance();
NamedTypeSymbol result;
(AssemblySymbol, AssemblySymbol)conflicts = default;
if (IsTypeMissing(type))
{
result = null;
}
else
{
// well-known types introduced before CSharp7 allow lookup ambiguity and report a warning
DiagnosticBag legacyWarnings = (type <= WellKnownType.CSharp7Sentinel) ? warnings : null;
result = this.Assembly.GetTypeByMetadataName(
mdName, includeReferences: true, useCLSCompliantNameArityEncoding: true, isWellKnownType: true, conflicts: out conflicts,
warnings: legacyWarnings, ignoreCorLibraryDuplicatedTypes: ignoreCorLibraryDuplicatedTypes);
}
if ((object)result == null)
{
// TODO: should GetTypeByMetadataName rather return a missing symbol?
MetadataTypeName emittedName = MetadataTypeName.FromFullName(mdName, useCLSCompliantNameArityEncoding: true);
if (type.IsValueTupleType())
{
CSDiagnosticInfo errorInfo;
if (conflicts.Item1 is null)
{
Debug.Assert(conflicts.Item2 is null);
errorInfo = new CSDiagnosticInfo(ErrorCode.ERR_PredefinedValueTupleTypeNotFound, emittedName.FullName);
}
else
{
errorInfo = new CSDiagnosticInfo(ErrorCode.ERR_PredefinedValueTupleTypeAmbiguous3, emittedName.FullName, conflicts.Item1, conflicts.Item2);
}
result = new MissingMetadataTypeSymbol.TopLevelWithCustomErrorInfo(this.Assembly.Modules[0], ref emittedName, errorInfo, type);
}
else
{
result = new MissingMetadataTypeSymbol.TopLevel(this.Assembly.Modules[0], ref emittedName, type);
}
}
if ((object)Interlocked.CompareExchange(ref _lazyWellKnownTypes[index], result, null) != null)
{
Debug.Assert(
TypeSymbol.Equals(result, _lazyWellKnownTypes[index], TypeCompareKind.ConsiderEverything2) || (_lazyWellKnownTypes[index].IsErrorType() && result.IsErrorType())
);
}
else
{
AdditionalCodegenWarnings.AddRange(warnings);
}
warnings.Free();
}
return(_lazyWellKnownTypes[index]);
}
/// <summary> /// Lookup a top level type referenced from metadata, names should be /// compared case-sensitively. /// </summary> /// <param name="emittedName"> /// Full type name, possibly with generic name mangling. /// </param> /// <returns> /// Symbol for the type, or MissingMetadataSymbol if the type isn't found. /// </returns> /// <remarks></remarks> internal abstract NamedTypeSymbol LookupTopLevelMetadataType(ref MetadataTypeName emittedName);
internal NamedTypeSymbol GetTopLevelTypeByMetadataName(
ref MetadataTypeName metadataName,
AssemblyIdentity assemblyOpt,
bool includeReferences,
bool isWellKnownType,
DiagnosticBag warnings = null)
{
NamedTypeSymbol result;
// First try this assembly
result = GetTopLevelTypeByMetadataName(this, ref metadataName, assemblyOpt);
if (isWellKnownType && !IsValidWellKnownType(result))
{
result = null;
}
// ignore any types of the same name that might be in referenced assemblies (prefer the current assembly):
if ((object)result != null || !includeReferences)
{
return result;
}
Debug.Assert(this is SourceAssemblySymbol,
"Never include references for a non-source assembly, because they don't know about aliases.");
// Lookup in references
foreach (var reference in GetUnaliasedReferencedAssemblies())
{
Debug.Assert(!(this is SourceAssemblySymbol && reference.IsMissing)); // Non-source assemblies can have missing references
NamedTypeSymbol candidate = GetTopLevelTypeByMetadataName(reference, ref metadataName, assemblyOpt);
if (isWellKnownType && !IsValidWellKnownType(candidate))
{
candidate = null;
}
if ((object)candidate == null)
{
continue;
}
Debug.Assert(candidate != result);
if ((object)result != null)
{
// duplicate
if (warnings == null)
{
return null;
}
else
{
// The predefined type '{0}' is defined in multiple assemblies in the global alias; using definition from '{1}'
warnings.Add(ErrorCode.WRN_MultiplePredefTypes, NoLocation.Singleton, result, result.ContainingAssembly);
return result;
}
}
result = candidate;
}
return result;
}
public string Type(MetadataTypeName typeName) => Type(typeName.Name, typeName.GenericArgs);
internal void AssertDeclaresType(PEModuleSymbol peModule, WellKnownType type, Accessibility expectedAccessibility)
{
var name = MetadataTypeName.FromFullName(type.GetMetadataName());
Assert.Equal(expectedAccessibility, peModule.LookupTopLevelMetadataType(ref name).DeclaredAccessibility);
}
internal override NamedTypeSymbol LookupMetadataType(ref MetadataTypeName typeName)
{
return(this.RetargetingTranslator.Retarget(_underlyingType.LookupMetadataType(ref typeName), RetargetOptions.RetargetPrimitiveTypesByName));
}
public Nested(NamedTypeSymbol containingType, ref MetadataTypeName emittedName)
: this(containingType, ref emittedName, emittedName.ForcedArity == -1 || emittedName.ForcedArity == emittedName.InferredArity)
{
}
private void CacheTopLevelMetadataType(
ref MetadataTypeName emittedName,
NamedTypeSymbol result)
{
NamedTypeSymbol result1 = null;
result1 = this.emittedNameToTypeMap.GetOrAdd(emittedName.ToKey(), result);
System.Diagnostics.Debug.Assert(result1 == result); // object identity may differ in error cases
}
internal override NamedTypeSymbol TryLookupForwardedMetadataTypeWithCycleDetection(ref MetadataTypeName emittedName, ConsList <AssemblySymbol> visitedAssemblies)
{
NamedTypeSymbol underlying = _underlyingAssembly.TryLookupForwardedMetadataType(ref emittedName);
if ((object)underlying == null)
{
return(null);
}
return(this.RetargetingTranslator.Retarget(underlying, RetargetOptions.RetargetPrimitiveTypesByName));
}
public TopLevelWithCustomErrorInfo(ModuleSymbol module, ref MetadataTypeName emittedName, DiagnosticInfo errorInfo)
: base(module, ref emittedName)
{
Debug.Assert(errorInfo != null);
this.errorInfo = errorInfo;
}
/// <summary>
/// Lookup an immediately nested type referenced from metadata, names should be
/// compared case-sensitively.
/// </summary>
/// <param name="emittedTypeName">
/// Simple type name, possibly with generic name mangling.
/// </param>
/// <returns>
/// Symbol for the type, or MissingMetadataSymbol if the type isn't found.
/// </returns>
internal virtual NamedTypeSymbol LookupMetadataType(ref MetadataTypeName emittedTypeName)
{
Debug.Assert(!emittedTypeName.IsNull);
NamespaceOrTypeSymbol scope = this;
if (scope.Kind == SymbolKind.ErrorType)
{
return(new MissingMetadataTypeSymbol.Nested((NamedTypeSymbol)scope, ref emittedTypeName));
}
NamedTypeSymbol namedType = null;
ImmutableArray <NamedTypeSymbol> namespaceOrTypeMembers;
bool isTopLevel = scope.IsNamespace;
//Debug.Assert(!isTopLevel || scope.ToDisplayString(SymbolDisplayFormat.QualifiedNameOnlyFormat) == emittedTypeName.NamespaceName);
if (emittedTypeName.IsMangled)
{
Debug.Assert(!emittedTypeName.UnmangledTypeName.Equals(emittedTypeName.TypeName) && emittedTypeName.InferredArity > 0);
if (emittedTypeName.ForcedArity == -1 || emittedTypeName.ForcedArity == emittedTypeName.InferredArity)
{
// Let's handle mangling case first.
namespaceOrTypeMembers = scope.Kind == SymbolKind.NamedType // we don't have proper namese symbols, only global one so FullName it is
? scope.GetTypeMembers(emittedTypeName.UnmangledTypeName)
: scope.GetTypeMembers(emittedTypeName.FullName);
foreach (var named in namespaceOrTypeMembers)
{
if (emittedTypeName.InferredArity == named.Arity && named.MangleName)
{
if ((object)namedType != null)
{
namedType = null;
break;
}
namedType = named;
}
}
}
}
else
{
Debug.Assert(ReferenceEquals(emittedTypeName.UnmangledTypeName, emittedTypeName.TypeName) && emittedTypeName.InferredArity == 0);
}
// Now try lookup without removing generic arity mangling.
int forcedArity = emittedTypeName.ForcedArity;
if (emittedTypeName.UseCLSCompliantNameArityEncoding)
{
// Only types with arity 0 are acceptable, we already examined types with mangled names.
if (emittedTypeName.InferredArity > 0)
{
goto Done;
}
else if (forcedArity == -1)
{
forcedArity = 0;
}
else if (forcedArity != 0)
{
goto Done;
}
else
{
Debug.Assert(forcedArity == emittedTypeName.InferredArity);
}
}
namespaceOrTypeMembers = scope.GetTypeMembers(emittedTypeName.FullName);
foreach (var named in namespaceOrTypeMembers)
{
if (!named.MangleName && (forcedArity == -1 || forcedArity == named.Arity))
{
if ((object)namedType != null)
{
namedType = null;
break;
}
namedType = named;
}
}
Done:
if ((object)namedType == null)
{
return(new MissingMetadataTypeSymbol(emittedTypeName.FullName, emittedTypeName.ForcedArity, emittedTypeName.IsMangled));
//if (isTopLevel)
//{
// return new MissingMetadataTypeSymbol.TopLevel(scope.ContainingModule, ref emittedTypeName);
//}
//else
//{
// return new MissingMetadataTypeSymbol.Nested((NamedTypeSymbol)scope, ref emittedTypeName);
//}
}
return(namedType);
}
public TopLevel(ModuleSymbol module, ref MetadataTypeName fullName)
: this(module, ref fullName, -1)
{
}
internal override NamedTypeSymbol TryLookupForwardedMetadataTypeWithCycleDetection(ref MetadataTypeName emittedName, ConsList <AssemblySymbol> visitedAssemblies)
{
// Check if it is a forwarded type.
var forwardedToAssembly = LookupAssemblyForForwardedMetadataType(ref emittedName);
if ((object)forwardedToAssembly != null)
{
// Don't bother to check the forwarded-to assembly if we've already seen it.
if (visitedAssemblies != null && visitedAssemblies.Contains(forwardedToAssembly))
{
return(CreateCycleInTypeForwarderErrorTypeSymbol(ref emittedName));
}
else
{
visitedAssemblies = new ConsList <AssemblySymbol>(this, visitedAssemblies ?? ConsList <AssemblySymbol> .Empty);
return(forwardedToAssembly.LookupTopLevelMetadataTypeWithCycleDetection(ref emittedName, visitedAssemblies, digThroughForwardedTypes: true));
}
}
return(null);
}
private TopLevel(ModuleSymbol module, ref MetadataTypeName fullName, bool mangleName)
: this(module, fullName.NamespaceName,
mangleName ? fullName.UnmangledTypeName : fullName.TypeName,
mangleName ? fullName.InferredArity : fullName.ForcedArity,
mangleName)
{
}
protected override TypeSymbol LookupNestedTypeDefSymbol(TypeSymbol container, ref MetadataTypeName emittedName)
{
return(container.LookupMetadataType(ref emittedName));
}
internal override NamedTypeSymbol TryLookupForwardedMetadataTypeWithCycleDetection(ref MetadataTypeName emittedName, ConsList<AssemblySymbol> visitedAssemblies)
{
return null;
}
protected override TypeSymbol LookupTopLevelTypeDefSymbol(int referencedAssemblyIndex, ref MetadataTypeName emittedName)
{
var assembly = this.GetAssemblies()[referencedAssemblyIndex];
return(assembly.LookupTopLevelMetadataType(ref emittedName, digThroughForwardedTypes: true));
}
/// <summary>
/// Look up the assembly to which the given metadata type is forwarded.
/// </summary>
/// <param name="emittedName"></param>
/// <returns>
/// The assembly to which the given type is forwarded or null, if there isn't one.
/// </returns>
/// <remarks>
/// The returned assembly may also forward the type.
/// </remarks>
internal AssemblySymbol LookupAssemblyForForwardedMetadataType(ref MetadataTypeName emittedName)
{
// Look in the type forwarders of the primary module of this assembly, clr does not honor type forwarder
// in non-primary modules.
// Examine the type forwarders, but only from the primary module.
return this.PrimaryModule.GetAssemblyForForwardedType(ref emittedName);
}
public string Type(MetadataTypeName typeName, bool includeNested = false)
{
return(Type(typeName.Name, typeName.GenericArgs, includeNested: includeNested));
}
private MetadataType FindMetadataTypeByMetadataTypeName(List<MetadataType> allTypes,
MetadataTypeName metadataTypeName)
{
if (metadataTypeName == null)
return null;
var metaDataType = allTypes.Where(x => x.Name == metadataTypeName.Name &&
x.Namespace == metadataTypeName.Namespace)
.FirstNonDefault();
return metaDataType;
}
public string Type(MetadataTypeName typeName)
{
return(Type(typeName.Name, typeName.GenericArgs));
}
public MetadataType FindType(MetadataTypeName typeName)
{
if (typeName == null)
return null;
var foundType = AllTypes
.FirstOrDefault(x => (typeName.Namespace == null || x.Namespace == typeName.Namespace)
&& x.Name == typeName.Name
&& x.GenericArgs.Safe().Count() == typeName.GenericArgs.Safe().Count());
if (foundType != null)
return foundType;
if (typeName.Name == typeof(QueryBase).Name || typeName.Name == typeof(QueryBase<>).Name)
return CreateType(typeof(QueryBase)); //Properties are on QueryBase
if (typeName.Name == typeof(AuthUserSession).Name)
return CreateType(typeof(AuthUserSession));
return null;
}
protected override TypeSymbol LookupNestedTypeDefSymbol(TypeSymbol container, ref MetadataTypeName emittedName)
{
var result = container.LookupMetadataType(ref emittedName);
Debug.Assert((object)result != null);
return(result);
}
private NamedTypeSymbol LookupTopLevelMetadataTypeInCache(ref MetadataTypeName emittedName)
{
NamedTypeSymbol result = null;
if (this.emittedNameToTypeMap.TryGetValue(emittedName.ToKey(), out result))
{
return result;
}
return null;
}
/// <summary>
/// Lookup a type defined in this module.
/// This method will be called only if the type we are
/// looking for hasn't been loaded yet. Otherwise, MetadataDecoder
/// would have found the type in TypeDefRowIdToTypeMap based on its
/// TypeDef row id.
/// </summary>
protected override TypeSymbol LookupTopLevelTypeDefSymbol(ref MetadataTypeName emittedName, out bool isNoPiaLocalType)
{
return(moduleSymbol.LookupTopLevelMetadataType(ref emittedName, out isNoPiaLocalType));
}
/// <summary>
/// Lookup a top level type referenced from metadata, names should be
/// compared case-sensitively. Detect cycles during lookup.
/// </summary>
/// <param name="emittedName">
/// Full type name, possibly with generic name mangling.
/// </param>
/// <param name="visitedAssemblies">
/// List of assemblies lookup has already visited (since type forwarding can introduce cycles).
/// </param>
/// <param name="digThroughForwardedTypes">
/// Take forwarded types into account.
/// </param>
internal sealed override NamedTypeSymbol LookupTopLevelMetadataTypeWithCycleDetection(ref MetadataTypeName emittedName, ConsList<AssemblySymbol> visitedAssemblies, bool digThroughForwardedTypes)
{
NamedTypeSymbol result = null;
// This is a cache similar to the one used by MetaImport::GetTypeByName in native
// compiler. The difference is that native compiler pre-populates the cache when it
// loads types. Here we are populating the cache only with things we looked for, so that
// next time we are looking for the same thing, the lookup is fast. This cache also
// takes care of TypeForwarders. Gives about 8% win on subsequent lookups in some
// scenarios.
//
// CONSIDER !!!
//
// However, it is questionable how often subsequent lookup by name is going to happen.
// Currently it doesn't happen for TypeDef tokens at all, for TypeRef tokens, the
// lookup by name is done once and the result is cached. So, multiple lookups by name
// for the same type are going to happen only in these cases:
// 1) Resolving GetType() in attribute application, type is encoded by name.
// 2) TypeRef token isn't reused within the same module, i.e. multiple TypeRefs point to
// the same type.
// 3) Different Module refers to the same type, lookup once per Module (with exception of #2).
// 4) Multitargeting - retargeting the type to a different version of assembly
result = LookupTopLevelMetadataTypeInCache(ref emittedName);
if ((object)result != null)
{
// We only cache result equivalent to digging through type forwarders, which
// might produce an forwarder specific ErrorTypeSymbol. We don't want to
// return that error symbol, unless digThroughForwardedTypes is true.
if (digThroughForwardedTypes || (!result.IsErrorType() && (object)result.ContainingAssembly == (object)this))
{
return result;
}
// According to the cache, the type wasn't found, or isn't declared in this assembly (forwarded).
return new MissingMetadataTypeSymbol.TopLevel(this.Modules[0], ref emittedName);
}
else
{
// Now we will look for the type in each module of the assembly and pick the first type
// we find, this is what native VB compiler does.
var modules = this.Modules;
var count = modules.Length;
var i = 0;
result = modules[i].LookupTopLevelMetadataType(ref emittedName);
if (result is MissingMetadataTypeSymbol)
{
for (i = 1; i < count; i++)
{
var newResult = modules[i].LookupTopLevelMetadataType(ref emittedName);
// Hold on to the first missing type result, unless we found the type.
if (!(newResult is MissingMetadataTypeSymbol))
{
result = newResult;
break;
}
}
}
bool foundMatchInThisAssembly = (i < count);
Debug.Assert(!foundMatchInThisAssembly || (object)result.ContainingAssembly == (object)this);
if (!foundMatchInThisAssembly && digThroughForwardedTypes)
{
// We didn't find the type
System.Diagnostics.Debug.Assert(result is MissingMetadataTypeSymbol);
NamedTypeSymbol forwarded = TryLookupForwardedMetadataTypeWithCycleDetection(ref emittedName, visitedAssemblies);
if ((object)forwarded != null)
{
result = forwarded;
}
}
System.Diagnostics.Debug.Assert((object)result != null);
// Add result of the lookup into the cache
if (digThroughForwardedTypes || foundMatchInThisAssembly)
{
CacheTopLevelMetadataType(ref emittedName, result);
}
return result;
}
}
/// <summary>
/// Find canonical type for NoPia embedded type.
/// </summary>
/// <returns>
/// Symbol for the canonical type or an ErrorTypeSymbol. Never returns null.
/// </returns>
internal static NamedTypeSymbol SubstituteNoPiaLocalType(
ref MetadataTypeName name,
bool isInterface,
TypeSymbol baseType,
string interfaceGuid,
string scope,
string identifier,
AssemblySymbol referringAssembly)
{
NamedTypeSymbol result = null;
Guid interfaceGuidValue = new Guid();
bool haveInterfaceGuidValue = false;
Guid scopeGuidValue = new Guid();
bool haveScopeGuidValue = false;
if (isInterface && interfaceGuid != null)
{
haveInterfaceGuidValue = Guid.TryParse(interfaceGuid, out interfaceGuidValue);
if (haveInterfaceGuidValue)
{
// To have consistent errors.
scope = null;
identifier = null;
}
}
if (scope != null)
{
haveScopeGuidValue = Guid.TryParse(scope, out scopeGuidValue);
}
foreach (AssemblySymbol assembly in referringAssembly.GetNoPiaResolutionAssemblies())
{
Debug.Assert((object)assembly != null);
if (ReferenceEquals(assembly, referringAssembly))
{
continue;
}
NamedTypeSymbol candidate = assembly.LookupTopLevelMetadataType(ref name, digThroughForwardedTypes: false);
Debug.Assert(!candidate.IsGenericType);
// Ignore type forwarders, error symbols and non-public types
if (candidate.Kind == SymbolKind.ErrorType ||
!ReferenceEquals(candidate.ContainingAssembly, assembly) ||
candidate.DeclaredAccessibility != Accessibility.Public)
{
continue;
}
// Ignore NoPia local types.
// If candidate is coming from metadata, we don't need to do any special check,
// because we do not create symbols for local types. However, local types defined in source
// is another story. However, if compilation explicitly defines a local type, it should be
// represented by a retargeting assembly, which is supposed to hide the local type.
Debug.Assert(!(assembly is SourceAssemblySymbol) || !((SourceAssemblySymbol)assembly).SourceModule.MightContainNoPiaLocalTypes());
string candidateGuid;
bool haveCandidateGuidValue = false;
Guid candidateGuidValue = new Guid();
// The type must be of the same kind (interface, struct, delegate or enum).
switch (candidate.TypeKind)
{
case TypeKind.Interface:
if (!isInterface)
{
continue;
}
// Get candidate's Guid
if (candidate.GetGuidString(out candidateGuid) && candidateGuid != null)
{
haveCandidateGuidValue = Guid.TryParse(candidateGuid, out candidateGuidValue);
}
break;
case TypeKind.Delegate:
case TypeKind.Enum:
case TypeKind.Struct:
if (isInterface)
{
continue;
}
// Let's use a trick. To make sure the kind is the same, make sure
// base type is the same.
if (!ReferenceEquals(baseType, candidate.BaseTypeNoUseSiteDiagnostics))
{
continue;
}
break;
default:
continue;
}
if (haveInterfaceGuidValue || haveCandidateGuidValue)
{
if (!haveInterfaceGuidValue || !haveCandidateGuidValue ||
candidateGuidValue != interfaceGuidValue)
{
continue;
}
}
else
{
if (!haveScopeGuidValue || identifier == null || !identifier.Equals(name.FullName))
{
continue;
}
// Scope guid must match candidate's assembly guid.
haveCandidateGuidValue = false;
if (assembly.GetGuidString(out candidateGuid) && candidateGuid != null)
{
haveCandidateGuidValue = Guid.TryParse(candidateGuid, out candidateGuidValue);
}
if (!haveCandidateGuidValue || scopeGuidValue != candidateGuidValue)
{
continue;
}
}
// OK. It looks like we found canonical type definition.
if ((object)result != null)
{
// Ambiguity
result = new NoPiaAmbiguousCanonicalTypeSymbol(referringAssembly, result, candidate);
break;
}
result = candidate;
}
if ((object)result == null)
{
result = new NoPiaMissingCanonicalTypeSymbol(
referringAssembly,
name.FullName,
interfaceGuid,
scope,
identifier);
}
return(result);
}
internal override NamedTypeSymbol LookupMetadataType(ref MetadataTypeName typeName)
{
return this.RetargetingTranslator.Retarget(this.underlyingType.LookupMetadataType(ref typeName), RetargetOptions.RetargetPrimitiveTypesByName);
}
/// <summary>
/// For test purposes only.
/// </summary>
internal NamedTypeSymbol CachedTypeByEmittedName(string emittedname)
{
MetadataTypeName mdName = MetadataTypeName.FromFullName(emittedname);
return(_emittedNameToTypeMap[mdName.ToKey()]);
}
/// <summary>
/// Lookup an immediately nested type referenced from metadata, names should be
/// compared case-sensitively.
/// </summary>
/// <param name="emittedTypeName">
/// Simple type name, possibly with generic name mangling.
/// </param>
/// <returns>
/// Symbol for the type, or MissingMetadataSymbol if the type isn't found.
/// </returns>
internal virtual NamedTypeSymbol LookupMetadataType(ref MetadataTypeName emittedTypeName)
{
Debug.Assert(!emittedTypeName.IsNull);
NamespaceOrTypeSymbol scope = this;
if (scope.Kind == SymbolKind.ErrorType)
{
return new MissingMetadataTypeSymbol.Nested((NamedTypeSymbol)scope, ref emittedTypeName);
}
NamedTypeSymbol namedType = null;
ImmutableArray<NamedTypeSymbol> namespaceOrTypeMembers;
bool isTopLevel = scope.IsNamespace;
Debug.Assert(!isTopLevel || scope.ToDisplayString(SymbolDisplayFormat.QualifiedNameOnlyFormat) == emittedTypeName.NamespaceName);
if (emittedTypeName.IsMangled)
{
Debug.Assert(!emittedTypeName.UnmangledTypeName.Equals(emittedTypeName.TypeName) && emittedTypeName.InferredArity > 0);
if (emittedTypeName.ForcedArity == -1 || emittedTypeName.ForcedArity == emittedTypeName.InferredArity)
{
// Let's handle mangling case first.
namespaceOrTypeMembers = scope.GetTypeMembers(emittedTypeName.UnmangledTypeName);
foreach (var named in namespaceOrTypeMembers)
{
if (emittedTypeName.InferredArity == named.Arity && named.MangleName)
{
if ((object)namedType != null)
{
namedType = null;
break;
}
namedType = named;
}
}
}
}
else
{
Debug.Assert(ReferenceEquals(emittedTypeName.UnmangledTypeName, emittedTypeName.TypeName) && emittedTypeName.InferredArity == 0);
}
// Now try lookup without removing generic arity mangling.
int forcedArity = emittedTypeName.ForcedArity;
if (emittedTypeName.UseCLSCompliantNameArityEncoding)
{
// Only types with arity 0 are acceptable, we already examined types with mangled names.
if (emittedTypeName.InferredArity > 0)
{
goto Done;
}
else if (forcedArity == -1)
{
forcedArity = 0;
}
else if (forcedArity != 0)
{
goto Done;
}
else
{
Debug.Assert(forcedArity == emittedTypeName.InferredArity);
}
}
namespaceOrTypeMembers = scope.GetTypeMembers(emittedTypeName.TypeName);
foreach (var named in namespaceOrTypeMembers)
{
if (!named.MangleName && (forcedArity == -1 || forcedArity == named.Arity))
{
if ((object)namedType != null)
{
namedType = null;
break;
}
namedType = named;
}
}
Done:
if ((object)namedType == null)
{
if (isTopLevel)
{
return new MissingMetadataTypeSymbol.TopLevel(scope.ContainingModule, ref emittedTypeName);
}
else
{
return new MissingMetadataTypeSymbol.Nested((NamedTypeSymbol)scope, ref emittedTypeName);
}
}
return namedType;
}
/// <summary>
/// Lookup a top level type referenced from metadata, names should be
/// compared case-sensitively. Detect cycles during lookup.
/// </summary>
/// <param name="emittedName">
/// Full type name, possibly with generic name mangling.
/// </param>
/// <param name="visitedAssemblies">
/// List of assemblies lookup has already visited (since type forwarding can introduce cycles).
/// </param>
/// <param name="digThroughForwardedTypes">
/// Take forwarded types into account.
/// </param>
internal sealed override NamedTypeSymbol LookupTopLevelMetadataTypeWithCycleDetection(ref MetadataTypeName emittedName, ConsList <AssemblySymbol> visitedAssemblies, bool digThroughForwardedTypes)
{
NamedTypeSymbol result = null;
// This is a cache similar to the one used by MetaImport::GetTypeByName in native
// compiler. The difference is that native compiler pre-populates the cache when it
// loads types. Here we are populating the cache only with things we looked for, so that
// next time we are looking for the same thing, the lookup is fast. This cache also
// takes care of TypeForwarders. Gives about 8% win on subsequent lookups in some
// scenarios.
//
// CONSIDER !!!
//
// However, it is questionable how often subsequent lookup by name is going to happen.
// Currently it doesn't happen for TypeDef tokens at all, for TypeRef tokens, the
// lookup by name is done once and the result is cached. So, multiple lookups by name
// for the same type are going to happen only in these cases:
// 1) Resolving GetType() in attribute application, type is encoded by name.
// 2) TypeRef token isn't reused within the same module, i.e. multiple TypeRefs point to
// the same type.
// 3) Different Module refers to the same type, lookup once per Module (with exception of #2).
// 4) Multitargeting - retargeting the type to a different version of assembly
result = LookupTopLevelMetadataTypeInCache(ref emittedName);
if ((object)result != null)
{
// We only cache result equivalent to digging through type forwarders, which
// might produce an forwarder specific ErrorTypeSymbol. We don't want to
// return that error symbol, unless digThroughForwardedTypes is true.
if (digThroughForwardedTypes || (!result.IsErrorType() && (object)result.ContainingAssembly == (object)this))
{
return(result);
}
// According to the cache, the type wasn't found, or isn't declared in this assembly (forwarded).
throw new NotImplementedException();
//return new MissingMetadataTypeSymbol.TopLevel(this.Modules[0], ref emittedName);
}
else
{
// Now we will look for the type in each module of the assembly and pick the first type
// we find, this is what native VB compiler does.
var modules = this.Modules;
var count = modules.Length;
var i = 0;
result = modules[i].LookupTopLevelMetadataType(ref emittedName);
if (result is ErrorTypeSymbol)
{
for (i = 1; i < count; i++)
{
var newResult = modules[i].LookupTopLevelMetadataType(ref emittedName);
// Hold on to the first missing type result, unless we found the type.
if (!(newResult is ErrorTypeSymbol))
{
result = newResult;
break;
}
}
}
bool foundMatchInThisAssembly = (i < count);
Debug.Assert(!foundMatchInThisAssembly || (object)result.ContainingAssembly == (object)this);
if (!foundMatchInThisAssembly && digThroughForwardedTypes)
{
// We didn't find the type
Debug.Assert(result is ErrorTypeSymbol);
NamedTypeSymbol forwarded = TryLookupForwardedMetadataTypeWithCycleDetection(ref emittedName, visitedAssemblies);
if ((object)forwarded != null)
{
result = forwarded;
}
}
Debug.Assert((object)result != null);
// Add result of the lookup into the cache
if (digThroughForwardedTypes || foundMatchInThisAssembly)
{
CacheTopLevelMetadataType(ref emittedName, result);
}
return(result);
}
}
public TopLevel(ModuleSymbol module, ref MetadataTypeName fullName, SpecialType specialType)
: this(module, ref fullName, (int)specialType)
{
}
/// <summary>
/// Lookup a top level type referenced from metadata, names should be
/// compared case-sensitively.
/// </summary>
/// <param name="emittedName">
/// Full type name with generic name mangling.
/// </param>
/// <param name="digThroughForwardedTypes">
/// Take forwarded types into account.
/// </param>
/// <remarks></remarks>
internal NamedTypeSymbol LookupTopLevelMetadataType(ref MetadataTypeName emittedName, bool digThroughForwardedTypes)
{
return(LookupTopLevelMetadataTypeWithCycleDetection(ref emittedName, visitedAssemblies: null, digThroughForwardedTypes: digThroughForwardedTypes));
}
private TopLevel(ModuleSymbol module, ref MetadataTypeName fullName, int typeId)
: this(module, ref fullName, fullName.ForcedArity == -1 || fullName.ForcedArity == fullName.InferredArity)
{
Debug.Assert(typeId == -1 || typeId == (int)SpecialType.None || Arity == 0 || MangleName);
_lazyTypeId = typeId;
}
/// <summary> /// Lookup a top level type referenced from metadata, names should be /// compared case-sensitively. Detect cycles during lookup. /// </summary> /// <param name="emittedName"> /// Full type name, possibly with generic name mangling. /// </param> /// <param name="visitedAssemblies"> /// List of assemblies lookup has already visited (since type forwarding can introduce cycles). /// </param> /// <param name="digThroughForwardedTypes"> /// Take forwarded types into account. /// </param> internal abstract NamedTypeSymbol LookupTopLevelMetadataTypeWithCycleDetection(ref MetadataTypeName emittedName, ConsList <AssemblySymbol> visitedAssemblies, bool digThroughForwardedTypes);
public TopLevelWithCustomErrorInfo(ModuleSymbol module, ref MetadataTypeName emittedName, DiagnosticInfo errorInfo, WellKnownType typeId)
: base(module, ref emittedName, typeId)
{
Debug.Assert(errorInfo != null);
_errorInfo = errorInfo;
}
/// <summary>
/// Look up the given metadata type, if it is forwarded.
/// </summary>
internal NamedTypeSymbol TryLookupForwardedMetadataType(ref MetadataTypeName emittedName)
{
return(TryLookupForwardedMetadataTypeWithCycleDetection(ref emittedName, visitedAssemblies: null));
}
private Nested(NamedTypeSymbol containingType, ref MetadataTypeName emittedName, bool mangleName)
: this(containingType,
mangleName ? emittedName.UnmangledTypeName : emittedName.TypeName,
mangleName ? emittedName.InferredArity : emittedName.ForcedArity,
mangleName)
{
}
/// <summary>
/// Look up the given metadata type, if it is forwarded.
/// </summary>
internal virtual NamedTypeSymbol TryLookupForwardedMetadataTypeWithCycleDetection(ref MetadataTypeName emittedName, ConsList <AssemblySymbol> visitedAssemblies)
{
return(null);
}
/// <summary>
/// Lookup a top level type referenced from metadata, names should be
/// compared case-sensitively.
/// </summary>
/// <param name="emittedName">
/// Full type name, possibly with generic name mangling.
/// </param>
/// <returns>
/// Symbol for the type, or MissingMetadataSymbol if the type isn't found.
/// </returns>
/// <remarks></remarks>
internal sealed override NamedTypeSymbol LookupTopLevelMetadataType(ref MetadataTypeName emittedName)
{
NamedTypeSymbol result;
NamespaceSymbol scope = this.GlobalNamespace.LookupNestedNamespace(emittedName.NamespaceSegments);
if ((object)scope == null)
{
// We failed to locate the namespace
result = new MissingMetadataTypeSymbol.TopLevel(this, ref emittedName);
}
else
{
result = scope.LookupMetadataType(ref emittedName);
}
Debug.Assert((object)result != null);
return result;
}
internal ErrorTypeSymbol CreateCycleInTypeForwarderErrorTypeSymbol(ref MetadataTypeName emittedName)
{
DiagnosticInfo diagnosticInfo = new CSDiagnosticInfo(ErrorCode.ERR_CycleInTypeForwarder, emittedName.FullName, this.Name);
return(new MissingMetadataTypeSymbol.TopLevelWithCustomErrorInfo(this.Modules[0], ref emittedName, diagnosticInfo));
}
internal override NamedTypeSymbol TryLookupForwardedMetadataTypeWithCycleDetection(ref MetadataTypeName emittedName, ConsList<AssemblySymbol> visitedAssemblies)
{
NamedTypeSymbol underlying = _underlyingAssembly.TryLookupForwardedMetadataType(ref emittedName);
if ((object)underlying == null)
{
return null;
}
return this.RetargetingTranslator.Retarget(underlying, RetargetOptions.RetargetPrimitiveTypesByName);
}
internal ErrorTypeSymbol CreateMultipleForwardingErrorTypeSymbol(ref MetadataTypeName emittedName, ModuleSymbol forwardingModule, AssemblySymbol destination1, AssemblySymbol destination2)
{
var diagnosticInfo = new CSDiagnosticInfo(ErrorCode.ERR_TypeForwardedToMultipleAssemblies, forwardingModule, this, emittedName.FullName, destination1, destination2);
return(new MissingMetadataTypeSymbol.TopLevelWithCustomErrorInfo(forwardingModule, ref emittedName, diagnosticInfo));
}
internal override NamedTypeSymbol TryLookupForwardedMetadataTypeWithCycleDetection(ref MetadataTypeName emittedName, ConsList<AssemblySymbol> visitedAssemblies)
{
// Check if it is a forwarded type.
var forwardedToAssembly = LookupAssemblyForForwardedMetadataType(ref emittedName);
if ((object)forwardedToAssembly != null)
{
// Don't bother to check the forwarded-to assembly if we've already seen it.
if (visitedAssemblies != null && visitedAssemblies.Contains(forwardedToAssembly))
{
return CreateCycleInTypeForwarderErrorTypeSymbol(ref emittedName);
}
else
{
visitedAssemblies = new ConsList<AssemblySymbol>(this, visitedAssemblies ?? ConsList<AssemblySymbol>.Empty);
return forwardedToAssembly.LookupTopLevelMetadataTypeWithCycleDetection(ref emittedName, visitedAssemblies, digThroughForwardedTypes: true);
}
}
return null;
}
/// <summary>
/// Resolves <see cref="System.Type"/> to a <see cref="TypeSymbol"/> available in this assembly
/// its referenced assemblies.
/// </summary>
/// <param name="type">The type to resolve.</param>
/// <param name="includeReferences">Use referenced assemblies for resolution.</param>
/// <returns>The resolved symbol if successful or null on failure.</returns>
internal TypeSymbol GetTypeByReflectionType(Type type, bool includeReferences)
{
System.Reflection.TypeInfo typeInfo = type.GetTypeInfo();
Debug.Assert(!typeInfo.IsByRef);
// not supported (we don't accept open types as submission results nor host types):
Debug.Assert(!typeInfo.ContainsGenericParameters);
if (typeInfo.IsArray)
{
TypeSymbol symbol = GetTypeByReflectionType(typeInfo.GetElementType(), includeReferences);
if ((object)symbol == null)
{
return(null);
}
int rank = typeInfo.GetArrayRank();
return(ArrayTypeSymbol.CreateCSharpArray(this, symbol, ImmutableArray <CustomModifier> .Empty, rank));
}
else if (typeInfo.IsPointer)
{
TypeSymbol symbol = GetTypeByReflectionType(typeInfo.GetElementType(), includeReferences);
if ((object)symbol == null)
{
return(null);
}
return(new PointerTypeSymbol(symbol));
}
else if (typeInfo.DeclaringType != null)
{
Debug.Assert(!typeInfo.IsArray);
// consolidated generic arguments (includes arguments of all declaring types):
Type[] genericArguments = typeInfo.GenericTypeArguments;
int typeArgumentIndex = 0;
var currentTypeInfo = typeInfo.IsGenericType ? typeInfo.GetGenericTypeDefinition().GetTypeInfo() : typeInfo;
var nestedTypes = ArrayBuilder <System.Reflection.TypeInfo> .GetInstance();
while (true)
{
Debug.Assert(currentTypeInfo.IsGenericTypeDefinition || !currentTypeInfo.IsGenericType);
nestedTypes.Add(currentTypeInfo);
if (currentTypeInfo.DeclaringType == null)
{
break;
}
currentTypeInfo = currentTypeInfo.DeclaringType.GetTypeInfo();
}
int i = nestedTypes.Count - 1;
var symbol = (NamedTypeSymbol)GetTypeByReflectionType(nestedTypes[i].AsType(), includeReferences);
if ((object)symbol == null)
{
return(null);
}
while (--i >= 0)
{
int forcedArity = nestedTypes[i].GenericTypeParameters.Length - nestedTypes[i + 1].GenericTypeParameters.Length;
MetadataTypeName mdName = MetadataTypeName.FromTypeName(nestedTypes[i].Name, forcedArity: forcedArity);
symbol = symbol.LookupMetadataType(ref mdName);
if ((object)symbol == null || symbol.IsErrorType())
{
return(null);
}
symbol = ApplyGenericArguments(symbol, genericArguments, ref typeArgumentIndex, includeReferences);
if ((object)symbol == null)
{
return(null);
}
}
nestedTypes.Free();
Debug.Assert(typeArgumentIndex == genericArguments.Length);
return(symbol);
}
else
{
AssemblyIdentity assemblyId = AssemblyIdentity.FromAssemblyDefinition(typeInfo.Assembly);
MetadataTypeName mdName = MetadataTypeName.FromNamespaceAndTypeName(
typeInfo.Namespace ?? string.Empty,
typeInfo.Name,
forcedArity: typeInfo.GenericTypeArguments.Length);
NamedTypeSymbol symbol = GetTopLevelTypeByMetadataName(ref mdName, assemblyId, includeReferences, isWellKnownType: false);
if ((object)symbol == null || symbol.IsErrorType())
{
return(null);
}
int typeArgumentIndex = 0;
Type[] genericArguments = typeInfo.GenericTypeArguments;
symbol = ApplyGenericArguments(symbol, genericArguments, ref typeArgumentIndex, includeReferences);
Debug.Assert(typeArgumentIndex == genericArguments.Length);
return(symbol);
}
}
/// <summary>
/// If this module forwards the given type to another assembly, return that assembly;
/// otherwise, return null.
/// </summary>
/// <param name="fullName">Type to look up.</param>
/// <returns>Assembly symbol or null.</returns>
/// <remarks>
/// The returned assembly may also forward the type.
/// </remarks>
internal AssemblySymbol GetAssemblyForForwardedType(ref MetadataTypeName fullName)
{
try
{
string matchedName;
AssemblyReferenceHandle assemblyRef = Module.GetAssemblyForForwardedType(fullName.FullName, ignoreCase: false, matchedName: out matchedName);
return assemblyRef.IsNil ? null : this.GetReferencedAssemblySymbols()[Module.GetAssemblyReferenceIndexOrThrow(assemblyRef)];
}
catch (BadImageFormatException)
{
return null;
}
}
internal NamedTypeSymbol GetTopLevelTypeByMetadataName(
ref MetadataTypeName metadataName,
AssemblyIdentity assemblyOpt,
bool includeReferences,
bool isWellKnownType,
DiagnosticBag warnings = null,
bool ignoreCorLibraryDuplicatedTypes = false)
{
NamedTypeSymbol result;
// First try this assembly
result = GetTopLevelTypeByMetadataName(this, ref metadataName, assemblyOpt);
if (isWellKnownType && !IsValidWellKnownType(result))
{
result = null;
}
// ignore any types of the same name that might be in referenced assemblies (prefer the current assembly):
if ((object)result != null || !includeReferences)
{
return(result);
}
Debug.Assert(this is SourceAssemblySymbol,
"Never include references for a non-source assembly, because they don't know about aliases.");
var assemblies = ArrayBuilder <AssemblySymbol> .GetInstance();
// ignore reference aliases if searching for a type from a specific assembly:
if (assemblyOpt != null)
{
assemblies.AddRange(DeclaringCompilation.GetBoundReferenceManager().ReferencedAssemblies);
}
else
{
DeclaringCompilation.GetUnaliasedReferencedAssemblies(assemblies);
}
// Lookup in references
foreach (var assembly in assemblies)
{
Debug.Assert(!(this is SourceAssemblySymbol && assembly.IsMissing)); // Non-source assemblies can have missing references
NamedTypeSymbol candidate = GetTopLevelTypeByMetadataName(assembly, ref metadataName, assemblyOpt);
if (isWellKnownType && !IsValidWellKnownType(candidate))
{
candidate = null;
}
if ((object)candidate == null)
{
continue;
}
Debug.Assert(candidate != result);
if ((object)result != null)
{
// duplicate
if (ignoreCorLibraryDuplicatedTypes)
{
if (IsInCorLib(candidate))
{
// ignore candidate
continue;
}
if (IsInCorLib(result))
{
// drop previous result
result = candidate;
continue;
}
}
if (warnings == null)
{
result = null;
}
else
{
// The predefined type '{0}' is defined in multiple assemblies in the global alias; using definition from '{1}'
warnings.Add(ErrorCode.WRN_MultiplePredefTypes, NoLocation.Singleton, result, result.ContainingAssembly);
}
break;
}
result = candidate;
}
assemblies.Free();
return(result);
}
internal NamedTypeSymbol LookupTopLevelMetadataType(ref MetadataTypeName emittedName, out bool isNoPiaLocalType)
{
NamedTypeSymbol result;
PENamespaceSymbol scope = (PENamespaceSymbol)this.GlobalNamespace.LookupNestedNamespace(emittedName.NamespaceSegments);
if ((object)scope == null)
{
// We failed to locate the namespace
isNoPiaLocalType = false;
result = new MissingMetadataTypeSymbol.TopLevel(this, ref emittedName);
}
else
{
result = scope.LookupMetadataType(ref emittedName, out isNoPiaLocalType);
Debug.Assert((object)result != null);
}
return result;
}
private static NamedTypeSymbol GetTopLevelTypeByMetadataName(AssemblySymbol assembly, ref MetadataTypeName metadataName, AssemblyIdentity assemblyOpt)
{
var result = assembly.LookupTopLevelMetadataType(ref metadataName, digThroughForwardedTypes: false);
if (!IsAcceptableMatchForGetTypeByMetadataName(result))
{
return(null);
}
if (assemblyOpt != null && !assemblyOpt.Equals(assembly.Identity))
{
return(null);
}
return(result);
}
public string Type(MetadataTypeName typeName, bool includeNested = false)
{
return Type(typeName.Name, typeName.GenericArgs, includeNested: includeNested);
}
internal override NamedTypeSymbol LookupMetadataType(ref MetadataTypeName typeName)
{
// This method is invoked when looking up a type by metadata type
// name through a RetargetingAssemblySymbol. For instance, in
// UnitTests.Symbols.Metadata.PE.NoPia.LocalTypeSubstitution2.
NamedTypeSymbol underlying = this.underlyingNamespace.LookupMetadataType(ref typeName);
Debug.Assert((object)underlying.ContainingModule == (object)retargetingModule.UnderlyingModule);
if (!underlying.IsErrorType() && underlying.IsExplicitDefinitionOfNoPiaLocalType)
{
// Explicitly defined local types should be hidden.
return new MissingMetadataTypeSymbol.TopLevel(retargetingModule, ref typeName);
}
return this.RetargetingTranslator.Retarget(underlying, RetargetOptions.RetargetPrimitiveTypesByName);
}
public string Type(MetadataTypeName typeName)
{
return Type(typeName.Name, typeName.GenericArgs);
}
internal override NamedTypeSymbol LookupTopLevelMetadataTypeWithCycleDetection(ref MetadataTypeName emittedName, ConsList <AssemblySymbol> visitedAssemblies, bool digThroughForwardedTypes)
{
return(new MissingMetadataTypeSymbol(emittedName.FullName, emittedName.ForcedArity, emittedName.IsMangled));
}
