internal TypeSymbol GetTypeSymbolForSerializedType(string s)
{
if (string.IsNullOrEmpty(s))
{
return(GetUnsupportedMetadataTypeSymbol());
}
MetadataHelpers.AssemblyQualifiedTypeName fullName = MetadataHelpers.DecodeTypeName(s);
return(GetTypeSymbol(fullName, out bool refersToNoPiaLocalType));
}
internal TypeSymbol GetTypeSymbol(MetadataHelpers.AssemblyQualifiedTypeName fullName, out bool refersToNoPiaLocalType)
{
//
// Section 23.3 (Custom Attributes) of CLI Spec Partition II:
//
// If the parameter kind is System.Type, (also, the middle line in above diagram) its value is
// stored as a SerString (as defined in the previous paragraph), representing its canonical name.
// The canonical name is its full type name, followed optionally by the assembly where it is defined,
// its version, culture and public-key-token. If the assembly name is omitted, the CLI looks first
// in the current assembly, and then in the system library (mscorlib); in these two special cases,
// it is permitted to omit the assembly-name, version, culture and public-key-token.
int referencedAssemblyIndex;
if (fullName.AssemblyName != null)
{
AssemblyIdentity identity;
if (!AssemblyIdentity.TryParseDisplayName(fullName.AssemblyName, out identity))
{
refersToNoPiaLocalType = false;
return(GetUnsupportedMetadataTypeSymbol());
}
// the assembly name has to be a full name:
referencedAssemblyIndex = GetIndexOfReferencedAssembly(identity);
if (referencedAssemblyIndex == -1)
{
// In rare cases (e.g. assemblies emitted by Reflection.Emit) the identity
// might be the identity of the containing assembly. The metadata spec doesn't disallow this.
if (!this.IsContainingAssembly(identity))
{
refersToNoPiaLocalType = false;
return(GetUnsupportedMetadataTypeSymbol());
}
}
}
else
{
// Use this assembly
referencedAssemblyIndex = -1;
}
// Find the top level type
Debug.Assert(MetadataHelpers.IsValidMetadataIdentifier(fullName.TopLevelType));
var mdName = MetadataTypeName.FromFullName(fullName.TopLevelType);
TypeSymbol container = LookupTopLevelTypeDefSymbol(ref mdName, referencedAssemblyIndex, out refersToNoPiaLocalType);
// Process any nested types
if (fullName.NestedTypes != null)
{
if (refersToNoPiaLocalType)
{
// Types nested into local types are not supported.
refersToNoPiaLocalType = false;
return(GetUnsupportedMetadataTypeSymbol());
}
for (int i = 0; i < fullName.NestedTypes.Length; i++)
{
Debug.Assert(MetadataHelpers.IsValidMetadataIdentifier(fullName.NestedTypes[i]));
mdName = MetadataTypeName.FromTypeName(fullName.NestedTypes[i]);
// Find nested type in the container
container = LookupNestedTypeDefSymbol(container, ref mdName);
}
}
// Substitute type arguments if any
if (fullName.TypeArguments != null)
{
ImmutableArray <bool> argumentRefersToNoPiaLocalType;
var typeArguments = ResolveTypeArguments(fullName.TypeArguments, out argumentRefersToNoPiaLocalType);
container = SubstituteTypeParameters(container, typeArguments, argumentRefersToNoPiaLocalType);
foreach (bool flag in argumentRefersToNoPiaLocalType)
{
if (flag)
{
refersToNoPiaLocalType = true;
break;
}
}
}
else
{
container = SubstituteWithUnboundIfGeneric(container);
}
for (int i = 0; i < fullName.PointerCount; i++)
{
container = MakePointerTypeSymbol(container, ImmutableArray <ModifierInfo <TypeSymbol> > .Empty);
}
// Process any array type ranks
if (fullName.ArrayRanks != null)
{
foreach (int rank in fullName.ArrayRanks)
{
Debug.Assert(rank >= 0);
container = rank == 0 ?
GetSZArrayTypeSymbol(container, default(ImmutableArray <ModifierInfo <TypeSymbol> >)) :
GetMDArrayTypeSymbol(rank, container, default(ImmutableArray <ModifierInfo <TypeSymbol> >), ImmutableArray <int> .Empty, default(ImmutableArray <int>));
}
}
return(container);
}