swift-module-digester: always canonicalize super class types.

include/swift/AST/DiagnosticsModuleDiffer.def

@@ -74,6 +74,14 @@ ERROR(super_class_changed,none,"%0 has changed its super class from %1 to %2", (
 
 ERROR(nominal_type_kind_changed,none,"%0 has been changed to a %1", (StringRef, StringRef))
 
+ERROR(optional_req_changed,none,"%0 is %select{now|no longer}1 an optional requirement", (StringRef, bool))
+
+ERROR(var_let_changed,none,"%0 changes from %select{var|let}1 to %select{let|var}1", (StringRef, bool))
+
+ERROR(no_longer_open,none,"%0 is no longer open for subclassing", (StringRef))
+
+ERROR(func_type_escaping_changed,none,"%0 has %select{removed|added}2 @escaping in %1", (StringRef, StringRef, bool))
+
 #ifndef DIAG_NO_UNDEF
 # if defined(DIAG)
 #  undef DIAG

include/swift/IDE/APIDigesterData.h

@@ -27,6 +27,11 @@ class DiagnosticEngine;
 namespace ide {
 namespace api {
 
+enum class KeyKind {
+#define KEY(NAME) KK_##NAME,
+#include "swift/IDE/DigesterEnums.def"
+};
+
 // The node kind appearing in the tree that describes the content of the SDK
 enum class SDKNodeKind: uint8_t {
 #define NODE_KIND(NAME, VALUE) NAME,

include/swift/IDE/DigesterEnums.def

@@ -124,6 +124,8 @@ KEY_BOOL(IsOverriding, overriding)
 KEY_BOOL(IsProtocolReq, protocolReq)
 KEY_BOOL(HasDefaultArg, hasDefaultArg)
 KEY_BOOL(HasSetter, hasSetter)
+KEY_BOOL(IsLet, isLet)
+KEY_BOOL(IsOpen, isOpen)
 
 KEY(kind)
 

test/api-digester/Inputs/cake.swift

@@ -15,7 +15,9 @@ extension S1: P2 {}
 
 public class C0<T1, T2, T3> {}
 
-public class C1: C0<S1, S1, S1> {
+public typealias C0Alias = C0<S1, S1, S1>
+
+public class C1: C0Alias {
 	open class func foo1() {}
 	public weak var Ins : C1?
 	public unowned var Ins2 : C1 = C1()
@@ -76,3 +78,5 @@ public protocol PSub: PSuper {
   associatedtype T
   func foo()
 }
+
+public let GlobalVar = 1

test/api-digester/Inputs/cake1.swift

@@ -102,4 +102,26 @@ public class SuperClassChange: C7 {}
 
 public class GenericClass<T> {}
 
-public class SubGenericClass: GenericClass<P1> {}
+public class SubGenericClass: GenericClass<P1> {}
+
+@objc
+public protocol ObjCProtocol {
+  @objc
+  optional func removeOptional()
+  @objc
+  func addOptional()
+}
+
+public let GlobalLetChangedToVar = 1
+public var GlobalVarChangedToLet = 1
+
+public class ClassWithOpenMember {
+  open class func foo() {}
+  open var property: Int {get { return 1}}
+  open func bar() {}
+}
+
+public class EscapingFunctionType {
+  public func removedEscaping(_ a: @escaping ()->()) {}
+  public func addedEscaping(_ a: ()->()) {}
+}

test/api-digester/Inputs/cake2.swift

@@ -113,3 +113,25 @@ public class SuperClassChange: C8 {}
 public class GenericClass<T> {}
 
 public class SubGenericClass: GenericClass<P2> {}
+
+@objc
+public protocol ObjCProtocol {
+  @objc
+  func removeOptional()
+  @objc
+  optional func addOptional()
+}
+
+public var GlobalLetChangedToVar = 1
+public let GlobalVarChangedToLet = 1
+
+public class ClassWithOpenMember {
+  public class func foo() {}
+  public var property: Int {get { return 1}}
+  public func bar() {}
+}
+
+public class EscapingFunctionType {
+  public func removedEscaping(_ a: ()->()) {}
+  public func addedEscaping(_ a: @escaping ()->()) {}
+}

test/api-digester/Outputs/Cake-abi.txt

@@ -13,6 +13,7 @@ cake1: Constructor fixedLayoutStruct.init(b:a:) has been removed
 cake1: Func C4.foo() has been removed
 cake1: Func RequiementChanges.removedFunc() has been removed
 cake1: Subscript RemoveSetters.subscript(_:) has removed its setter
+cake1: Var GlobalVarChangedToLet has removed its setter
 cake1: Var RemoveSetters.Value has removed its setter
 cake1: Var RequiementChanges.removedVar has been removed
 
@@ -30,6 +31,8 @@ cake1: Constructor S1.init(_:) has parameter 0 type change from Int to Double
 cake1: Func C1.foo2(_:) has parameter 0 type change from Int to () -> ()
 cake1: Func C7.foo(_:_:) has removed default argument from parameter 0
 cake1: Func C7.foo(_:_:) has removed default argument from parameter 1
+cake1: Func EscapingFunctionType.addedEscaping(_:) has added @escaping in parameter 0
+cake1: Func EscapingFunctionType.removedEscaping(_:) has removed @escaping in parameter 0
 cake1: Func Somestruct2.foo1(_:) has parameter 0 type change from C3 to C1
 
 /* Decl Attribute changes */
@@ -42,6 +45,8 @@ cake1: Func S1.foo3() is now static
 cake1: Struct C6 is now with @_fixed_layout
 cake1: Var C1.CIIns1 changes from weak to strong
 cake1: Var C1.CIIns2 changes from strong to weak
+cake1: Var GlobalLetChangedToVar changes from let to var
+cake1: Var GlobalVarChangedToLet changes from var to let
 
 /* Fixed-layout Type changes */
 cake1: EnumElement FrozenKind.Fixed in a non-resilient type changes position from 1 to 2
@@ -53,6 +58,8 @@ cake2: Var fixedLayoutStruct.c is added to a non-resilient type
 cake2: Var fixedLayoutStruct.lazy_d.storage is added to a non-resilient type
 
 /* Conformance changes */
+cake1: Func ObjCProtocol.addOptional() is now an optional requirement
+cake1: Func ObjCProtocol.removeOptional() is no longer an optional requirement
 cake1: Protocol P3 has added inherited protocol P4
 cake1: Protocol P3 has removed inherited protocol P2
 cake1: Struct fixedLayoutStruct has removed conformance to P1

test/api-digester/Outputs/Cake.txt

@@ -12,6 +12,7 @@ cake1: Constructor fixedLayoutStruct.init(b:a:) has been removed
 cake1: Func C4.foo() has been removed
 cake1: Func RequiementChanges.removedFunc() has been removed
 cake1: Subscript RemoveSetters.subscript(_:) has removed its setter
+cake1: Var GlobalVarChangedToLet has removed its setter
 cake1: Var RemoveSetters.Value has removed its setter
 cake1: Var RequiementChanges.removedVar has been removed
 
@@ -38,6 +39,7 @@ cake1: Var C1.CIIns1 changes from weak to strong
 cake1: Var C1.CIIns2 changes from strong to weak
 
 /* Conformance changes */
+cake1: Func ObjCProtocol.removeOptional() is no longer an optional requirement
 cake1: Protocol P3 has added inherited protocol P4
 cake1: Protocol P3 has removed inherited protocol P2
 cake1: Struct fixedLayoutStruct has removed conformance to P1
@@ -52,3 +54,6 @@ cake2: Var RequiementChanges.addedVar has been added as a protocol requirement
 cake1: Class C4 has changed its super class from OldType to NewType
 cake1: Class SubGenericClass has changed its super class from GenericClass<P1> to GenericClass<P2>
 cake1: Class SuperClassRemoval has removed its super class C3
+cake1: Func ClassWithOpenMember.bar() is no longer open for subclassing
+cake1: Func ClassWithOpenMember.foo() is no longer open for subclassing
+cake1: Var ClassWithOpenMember.property is no longer open for subclassing