private NamedTypeSymbol TransformNamedType(NamedTypeSymbol namedType, bool isContaining = false)
{
if (namedType.IsTupleType)
{
return(TransformTupleType(namedType, isContaining));
}
// Native compiler encodes a bool for the given namedType, but none for its containing types.
if (!isContaining)
{
var flag = ConsumeFlag();
Debug.Assert(!flag);
}
NamedTypeSymbol containingType = namedType.ContainingType;
NamedTypeSymbol newContainingType;
if ((object)containingType != null && containingType.IsGenericType)
{
newContainingType = TransformNamedType(namedType.ContainingType, isContaining: true);
if ((object)newContainingType == null)
{
return(null);
}
Debug.Assert(newContainingType.IsGenericType);
}
else
{
newContainingType = containingType;
}
// Native compiler encodes bools for each type argument, starting from type arguments for the outermost containing type to those for the given namedType.
ImmutableArray <TypeSymbolWithAnnotations> typeArguments = namedType.TypeArgumentsNoUseSiteDiagnostics;
ImmutableArray <TypeSymbolWithAnnotations> transformedTypeArguments = TransformTypeArguments(typeArguments); // Note, modifiers are not involved, this is behavior of the native compiler.
if (transformedTypeArguments.IsDefault)
{
return(null);
}
// Construct a new namedType, if required.
bool containerIsChanged = (!TypeSymbol.Equals(newContainingType, containingType, TypeCompareKind.ConsiderEverything2));
if (containerIsChanged || transformedTypeArguments != typeArguments)
{
if (containerIsChanged)
{
namedType = namedType.OriginalDefinition.AsMember(newContainingType);
return(namedType.ConstructIfGeneric(transformedTypeArguments));
}
return(namedType.ConstructedFrom.Construct(transformedTypeArguments, unbound: false));
}
else
{
return(namedType);
}
}
private NamedTypeSymbol TransformNamedType(NamedTypeSymbol namedType, bool isContaining = false)
{
// Native compiler encodes a bool for the given namedType, but none for its containing types.
if (!isContaining)
{
var flag = ConsumeFlag();
Debug.Assert(!flag);
}
NamedTypeSymbol containingType = namedType.ContainingType;
NamedTypeSymbol newContainingType;
if ((object)containingType != null && containingType.IsGenericType)
{
newContainingType = TransformNamedType(namedType.ContainingType, isContaining: true);
if ((object)newContainingType == null)
{
return(null);
}
Debug.Assert(newContainingType.IsGenericType);
}
else
{
newContainingType = containingType;
}
// Native compiler encodes bools for each type argument, starting from type arguments for the outermost containing type to those for the given namedType.
ImmutableArray <TypeSymbol> typeArguments = namedType.TypeArgumentsNoUseSiteDiagnostics;
var customModifiers = namedType.HasTypeArgumentsCustomModifiers ? namedType.TypeArgumentsCustomModifiers : default(ImmutableArray <ImmutableArray <CustomModifier> >);
ImmutableArray <TypeSymbol> transformedTypeArguments = TransformTypeArguments(typeArguments); // Note, modifiers are not involved, this is behavior of the native compiler.
if (transformedTypeArguments.IsDefault)
{
return(null);
}
// Construct a new namedType, if required.
bool containerIsChanged = (newContainingType != containingType);
if (containerIsChanged || transformedTypeArguments != typeArguments)
{
var newTypeArguments = customModifiers.IsDefault ?
transformedTypeArguments.SelectAsArray(TypeMap.TypeSymbolAsTypeWithModifiers) :
transformedTypeArguments.Zip(customModifiers, (t, m) => new TypeWithModifiers(t, m)).AsImmutable();
if (containerIsChanged)
{
namedType = namedType.OriginalDefinition.AsMember(newContainingType);
return(namedType.ConstructIfGeneric(newTypeArguments));
}
return(namedType.ConstructedFrom.Construct(newTypeArguments, unbound: false));
}
else
{
return(namedType);
}
}
private NamedTypeSymbol DecodeNamedType(NamedTypeSymbol type)
{
// First decode the type arguments
var typeArgs = type.TypeArgumentsNoUseSiteDiagnostics;
var decodedArgs = DecodeTypeArguments(typeArgs);
NamedTypeSymbol decodedType = type;
// Now check the container
NamedTypeSymbol containingType = type.ContainingType;
NamedTypeSymbol decodedContainingType;
if ((object)containingType != null && containingType.IsGenericType)
{
decodedContainingType = DecodeNamedType(containingType);
Debug.Assert(decodedContainingType.IsGenericType);
}
else
{
decodedContainingType = containingType;
}
// Replace the type if necessary
var containerChanged = !ReferenceEquals(decodedContainingType, containingType);
var typeArgsChanged = typeArgs != decodedArgs;
if (typeArgsChanged || containerChanged)
{
var newTypeArgs = type.HasTypeArgumentsCustomModifiers
? decodedArgs.SelectAsArray((t, i, m) => new TypeWithModifiers(t, m.GetTypeArgumentCustomModifiers(i)), type)
: decodedArgs.SelectAsArray(TypeMap.TypeSymbolAsTypeWithModifiers);
if (containerChanged)
{
decodedType = decodedType.OriginalDefinition.AsMember(decodedContainingType);
// If the type is nested, e.g. Outer<T>.Inner<V>, then Inner is definitely
// not a tuple, since we know all tuple-compatible types (System.ValueTuple)
// are not nested types. Thus, it is safe to return without checking if
// Inner is a tuple.
return(decodedType.ConstructIfGeneric(newTypeArgs));
}
decodedType = type.ConstructedFrom.Construct(newTypeArgs, unbound: false);
}
// Now decode into a tuple, if it is one
int tupleCardinality;
if (decodedType.IsTupleCompatible(out tupleCardinality))
{
var elementNames = EatElementNamesIfAvailable(tupleCardinality);
Debug.Assert(elementNames.IsDefault || elementNames.Length == tupleCardinality);
decodedType = TupleTypeSymbol.Create(decodedType, elementNames);
}
return(decodedType);
}
private NamedTypeSymbol DecodeNamedType(NamedTypeSymbol type)
{
// First decode the type arguments
var typeArgs = type.TypeArgumentsWithAnnotationsNoUseSiteDiagnostics;
var decodedArgs = DecodeTypeArguments(typeArgs);
NamedTypeSymbol decodedType = type;
// Now check the container
NamedTypeSymbol containingType = type.ContainingType;
NamedTypeSymbol?decodedContainingType;
if (containingType is object && containingType.IsGenericType)
{
decodedContainingType = DecodeNamedType(containingType);
Debug.Assert(decodedContainingType.IsGenericType);
}
else
{
decodedContainingType = containingType;
}
// Replace the type if necessary
var containerChanged = !ReferenceEquals(decodedContainingType, containingType);
var typeArgsChanged = typeArgs != decodedArgs;
if (typeArgsChanged || containerChanged)
{
if (containerChanged)
{
decodedType = decodedType.OriginalDefinition.AsMember(decodedContainingType);
// If the type is nested, e.g. Outer<T>.Inner<V>, then Inner is definitely
// not a tuple, since we know all tuple-compatible types (System.ValueTuple)
// are not nested types. Thus, it is safe to return without checking if
// Inner is a tuple.
return(decodedType.ConstructIfGeneric(decodedArgs));
}
decodedType = type.ConstructedFrom.Construct(decodedArgs, unbound: false);
}
// Now decode into a tuple, if it is one
if (decodedType.IsTupleType)
{
int tupleCardinality = decodedType.TupleElementTypesWithAnnotations.Length;
if (tupleCardinality > 0)
{
var elementNames = EatElementNamesIfAvailable(tupleCardinality);
Debug.Assert(elementNames.IsDefault || elementNames.Length == tupleCardinality);
decodedType = NamedTypeSymbol.CreateTuple(decodedType, elementNames);
}
}
return(decodedType);
}
private NamedTypeSymbol TransformNamedType(NamedTypeSymbol namedType, bool isContaining = false)
{
Debug.Assert(!dynamicTransformFlags[index] || isContaining);
// Native compiler encodes a bool for the given namedType, but none for its containing types.
if (!isContaining)
{
index++;
}
NamedTypeSymbol containingType = namedType.ContainingType;
NamedTypeSymbol newContainingType;
if ((object)containingType != null && containingType.IsGenericType)
{
newContainingType = TransformNamedType(namedType.ContainingType, isContaining: true);
if ((object)newContainingType == null)
{
return(null);
}
Debug.Assert(newContainingType.IsGenericType);
}
else
{
newContainingType = containingType;
}
// Native compiler encodes bools for each type argument, starting from type arguments for the outermost containing type to those for the given namedType.
ImmutableArray <TypeSymbol> typeArguments = namedType.TypeArgumentsNoUseSiteDiagnostics;
ImmutableArray <TypeSymbol> transformedTypeArguments = TransformTypeArguments(typeArguments);
if (transformedTypeArguments.IsDefault)
{
return(null);
}
// Construct a new namedType, if required.
if (newContainingType != containingType)
{
namedType = namedType.OriginalDefinition.AsMember(newContainingType);
return(namedType.ConstructIfGeneric(transformedTypeArguments));
}
else if (transformedTypeArguments != typeArguments)
{
return(namedType.ConstructedFrom.Construct(transformedTypeArguments));
}
else
{
return(namedType);
}
}