/// <summary>
/// Given anonymous type provided constructs an implementation type symbol to be used in emit phase;
/// if the anonymous type has at least one field the implementation type symbol will be created based on
/// a generic type template generated for each 'unique' anonymous type structure, otherwise the template
/// type will be non-generic.
/// </summary>
private NamedTypeSymbol ConstructAnonymousTypeImplementationSymbol(AnonymousTypePublicSymbol anonymous)
{
Debug.Assert(ReferenceEquals(this, anonymous.Manager));
CheckSourceLocationSeen(anonymous);
AnonymousTypeDescriptor typeDescr = anonymous.TypeDescriptor;
typeDescr.AssertIsGood();
// Get anonymous type template
AnonymousTypeTemplateSymbol template;
if (!this.AnonymousTypeTemplates.TryGetValue(typeDescr.Key, out template))
{
// NOTE: the newly created template may be thrown away if another thread wins
template = this.AnonymousTypeTemplates.GetOrAdd(typeDescr.Key, new AnonymousTypeTemplateSymbol(this, typeDescr));
}
// Adjust template location if the template is owned by this manager
if (ReferenceEquals(template.Manager, this))
{
template.AdjustLocation(typeDescr.Location);
}
// In case template is not generic, just return it
if (template.Arity == 0)
{
return template;
}
// otherwise construct type using the field types
var typeArguments = typeDescr.Fields.SelectAsArray(f => f.Type);
return template.Construct(typeArguments);
}
internal AnonymousTypePropertySymbol(AnonymousTypePublicSymbol container, AnonymousTypeField field)
{
_containingType = container;
_type = field.Type;
_name = field.Name;
_locations = ImmutableArray.Create <Location>(field.Location);
_getMethod = new AnonymousTypePropertyGetAccessorSymbol(this);
_backingField = null;
}
internal AnonymousTypePropertySymbol(AnonymousTypePublicSymbol container, AnonymousTypeField field)
{
this.containingType = container;
this.type = field.Type;
this.name = field.Name;
this.locations = ImmutableArray.Create<Location>(field.Location);
this.getMethod = new AnonymousTypePropertyGetAccessorSymbol(this);
this.backingField = null;
}
internal AnonymousTypePropertySymbol(
AnonymousTypePublicSymbol container,
AnonymousTypeField field,
int index
)
: this(
container,
field,
field.TypeWithAnnotations,
index,
ImmutableArray.Create <Location>(field.Location),
includeBackingField : false
)
{
}
private void CheckSourceLocationSeen(AnonymousTypePublicSymbol anonymous)
{
#if DEBUG
Location location = anonymous.Locations[0];
if (location.IsInSource)
{
if (this.AreTemplatesSealed)
{
Debug.Assert(_sourceLocationsSeen.ContainsKey(location));
}
else
{
_sourceLocationsSeen.TryAdd(location, true);
}
}
#endif
}