Swift AST: add ConstructorDecl.isInheritable

and make `AbstractFunctionDecl.isOverridden` final

Author: eeckstein

SwiftCompilerSources/Sources/AST/Declarations.swift

@@ -182,10 +182,12 @@ final public class ParamDecl: VarDecl {
 final public class SubscriptDecl: AbstractStorageDecl, GenericContext {}
 
 public class AbstractFunctionDecl: ValueDecl, GenericContext {
-  public var isOverridden: Bool { bridged.AbstractFunction_isOverridden() }
+  final public var isOverridden: Bool { bridged.AbstractFunction_isOverridden() }
 }
 
-final public class ConstructorDecl: AbstractFunctionDecl {}
+final public class ConstructorDecl: AbstractFunctionDecl {
+  public var isInheritable: Bool { bridged.Constructor_isInheritable() }
+}
 
 final public class DestructorDecl: AbstractFunctionDecl {
   final public var isIsolated: Bool { bridged.Destructor_isIsolated() }

include/swift/AST/ASTBridging.h

@@ -351,6 +351,7 @@ struct BridgedDeclObj {
   BRIDGED_INLINE bool ProtocolDecl_requiresClass() const;
   BRIDGED_INLINE bool ProtocolDecl_isMarkerProtocol() const;
   BRIDGED_INLINE bool AbstractFunction_isOverridden() const;
+  BRIDGED_INLINE bool Constructor_isInheritable() const;
   BRIDGED_INLINE bool Destructor_isIsolated() const;
   BRIDGED_INLINE bool EnumElementDecl_hasAssociatedValues() const;
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedParameterList

include/swift/AST/ASTBridgingImpl.h

@@ -272,6 +272,10 @@ bool BridgedDeclObj::AbstractFunction_isOverridden() const {
   return getAs<swift::AbstractFunctionDecl>()->isOverridden();
 }
 
+bool BridgedDeclObj::Constructor_isInheritable() const {
+  return getAs<swift::ConstructorDecl>()->isInheritable();
+}
+
 bool BridgedDeclObj::Destructor_isIsolated() const {
   auto dd = getAs<swift::DestructorDecl>();
   auto ai = swift::getActorIsolation(dd);