internal NamedTypeSymbol GetWellKnownType(WellKnownType type)
{
Debug.Assert(type >= WellKnownType.First && type <= WellKnownType.Last && type != WellKnownType.ExtSentinel);
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;
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, warnings: legacyWarnings);
}
if ((object)result == null)
{
// TODO: should GetTypeByMetadataName rather return a missing symbol?
MetadataTypeName emittedName = MetadataTypeName.FromFullName(mdName, useCLSCompliantNameArityEncoding: true);
result = new MissingMetadataTypeSymbol.TopLevel(this.Assembly.Modules[0], ref emittedName, type);
}
if ((object)Interlocked.CompareExchange(ref _lazyWellKnownTypes[index], result, null) != null)
{
Debug.Assert(
result == _lazyWellKnownTypes[index] || (_lazyWellKnownTypes[index].IsErrorType() && result.IsErrorType())
);
}
else
{
AdditionalCodegenWarnings.AddRange(warnings);
}
warnings.Free();
}
return(_lazyWellKnownTypes[index]);
}
internal NamedTypeSymbol GetWellKnownType(WellKnownType type)
{
Debug.Assert(type >= WellKnownType.First && type <= WellKnownType.Last);
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 = this.Assembly.GetTypeByMetadataName(
mdName, includeReferences: true, useCLSCompliantNameArityEncoding: true, isWellKnownType: true, warnings: warnings);
if ((object)result == null)
{
// TODO: should GetTypeByMetadataName rather return a missing symbol?
MetadataTypeName emittedName = MetadataTypeName.FromFullName(mdName, useCLSCompliantNameArityEncoding: true);
result = new MissingMetadataTypeSymbol.TopLevel(this.Assembly.Modules[0], ref emittedName, type);
}
if ((object)Interlocked.CompareExchange(ref lazyWellKnownTypes[index], result, null) != null)
{
Debug.Assert(
result == lazyWellKnownTypes[index] || (lazyWellKnownTypes[index].IsErrorType() && result.IsErrorType())
);
}
else
{
AdditionalCodegenWarnings.AddRange(warnings);
}
warnings.Free();
}
return(lazyWellKnownTypes[index]);
}
/// <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(
result == _lazyWellKnownTypes[index] || (_lazyWellKnownTypes[index].IsErrorType() && result.IsErrorType())
);
}
else
{
AdditionalCodegenWarnings.AddRange(warnings);
}
warnings.Free();
}
return(_lazyWellKnownTypes[index]);
}
