Resolve conflicts with master

include/swift/AST/ASTNode.h

@@ -30,7 +30,7 @@ namespace swift {
   class Stmt;
   class Decl;
   class Pattern;
-  class TypeLoc;
+  class TypeRepr;
   class DeclContext;
   class SourceLoc;
   class SourceRange;
@@ -41,7 +41,7 @@ namespace swift {
   enum class StmtKind;
 
   struct ASTNode : public llvm::PointerUnion<Expr *, Stmt *, Decl *, Pattern *,
-                                             TypeLoc *> {
+                                             TypeRepr *> {
     // Inherit the constructors from PointerUnion.
     using PointerUnion::PointerUnion;
 

include/swift/AST/Attr.h

@@ -36,7 +36,6 @@
 #include "swift/AST/PlatformKind.h"
 #include "swift/AST/Requirement.h"
 #include "swift/AST/TrailingCallArguments.h"
-#include "swift/AST/TypeLoc.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/ErrorHandling.h"
@@ -56,6 +55,7 @@ class LazyConformanceLoader;
 class LazyMemberLoader;
 class PatternBindingInitializer;
 class TrailingWhereClause;
+class TypeExpr;
 
 /// TypeAttributes - These are attributes that may be applied to types.
 class TypeAttributes {
@@ -1110,47 +1110,41 @@ class DynamicReplacementAttr final
 
 /// The \c @_typeEraser(TypeEraserType) attribute.
 class TypeEraserAttr final : public DeclAttribute {
-  TypeLoc TypeEraserLoc;
+  TypeExpr *TypeEraserExpr;
   LazyMemberLoader *Resolver;
   uint64_t ResolverContextData;
 
   friend class ResolveTypeEraserTypeRequest;
 
-  TypeEraserAttr(SourceLoc atLoc, SourceRange range, TypeLoc typeEraserLoc,
+  TypeEraserAttr(SourceLoc atLoc, SourceRange range, TypeExpr *typeEraserExpr,
                  LazyMemberLoader *Resolver, uint64_t Data)
       : DeclAttribute(DAK_TypeEraser, atLoc, range, /*Implicit=*/false),
-        TypeEraserLoc(typeEraserLoc),
+        TypeEraserExpr(typeEraserExpr),
         Resolver(Resolver), ResolverContextData(Data) {}
 
 public:
   static TypeEraserAttr *create(ASTContext &ctx,
                                 SourceLoc atLoc, SourceRange range,
-                                TypeLoc typeEraserLoc);
+                                TypeExpr *typeEraserRepr);
 
   static TypeEraserAttr *create(ASTContext &ctx,
                                 LazyMemberLoader *Resolver,
                                 uint64_t Data);
 
   /// Retrieve the parsed type repr for this attribute, if it
   /// was parsed. Else returns \c nullptr.
-  TypeRepr *getParsedTypeEraserTypeRepr() const {
-    return TypeEraserLoc.getTypeRepr();
-  }
+  TypeRepr *getParsedTypeEraserTypeRepr() const;
 
   /// Retrieve the parsed location for this attribute, if it was parsed.
-  SourceLoc getLoc() const {
-    return TypeEraserLoc.getLoc();
-  }
+  SourceLoc getLoc() const;
 
   /// Retrieve the resolved type of this attribute if it has been resolved by a
   /// successful call to \c getResolvedType(). Otherwise,
   /// returns \c Type()
   ///
   /// This entrypoint is only suitable for syntactic clients like the
   /// AST printer. Semantic clients should use \c getResolvedType() instead.
-  Type getTypeWithoutResolving() const {
-    return TypeEraserLoc.getType();
-  }
+  Type getTypeWithoutResolving() const;
 
   /// Returns \c true if the type eraser type has a valid implementation of the
   /// erasing initializer for the given protocol.
@@ -1464,25 +1458,26 @@ class SpecializeAttr : public DeclAttribute {
 /// The @_implements attribute, which treats a decl as the implementation for
 /// some named protocol requirement (but otherwise not-visible by that name).
 class ImplementsAttr : public DeclAttribute {
-
-  TypeLoc ProtocolType;
+  TypeExpr *ProtocolType;
   DeclName MemberName;
   DeclNameLoc MemberNameLoc;
 
 public:
   ImplementsAttr(SourceLoc atLoc, SourceRange Range,
-                 TypeLoc ProtocolType,
+                 TypeExpr *ProtocolType,
                  DeclName MemberName,
                  DeclNameLoc MemberNameLoc);
 
   static ImplementsAttr *create(ASTContext &Ctx, SourceLoc atLoc,
                                 SourceRange Range,
-                                TypeLoc ProtocolType,
+                                TypeExpr *ProtocolType,
                                 DeclName MemberName,
                                 DeclNameLoc MemberNameLoc);
 
-  TypeLoc getProtocolType() const;
-  TypeLoc &getProtocolType();
+  void setProtocolType(Type ty);
+  Type getProtocolType() const;
+  TypeRepr *getProtocolTypeRepr() const;
+
   DeclName getMemberName() const { return MemberName; }
   DeclNameLoc getMemberNameLoc() const { return MemberNameLoc; }
 
@@ -1595,27 +1590,27 @@ class ClangImporterSynthesizedTypeAttr : public DeclAttribute {
 /// Defines a custom attribute.
 class CustomAttr final : public DeclAttribute,
                          public TrailingCallArguments<CustomAttr> {
-  TypeLoc type;
+  TypeExpr *typeExpr;
   Expr *arg;
   PatternBindingInitializer *initContext;
   Expr *semanticInit = nullptr;
 
   unsigned hasArgLabelLocs : 1;
   unsigned numArgLabels : 16;
 
-  CustomAttr(SourceLoc atLoc, SourceRange range, TypeLoc type,
+  CustomAttr(SourceLoc atLoc, SourceRange range, TypeExpr *type,
              PatternBindingInitializer *initContext, Expr *arg,
              ArrayRef<Identifier> argLabels, ArrayRef<SourceLoc> argLabelLocs,
              bool implicit);
 
 public:
-  static CustomAttr *create(ASTContext &ctx, SourceLoc atLoc, TypeLoc type,
+  static CustomAttr *create(ASTContext &ctx, SourceLoc atLoc, TypeExpr *type,
                             bool implicit = false) {
     return create(ctx, atLoc, type, false, nullptr, SourceLoc(), { }, { }, { },
                   SourceLoc(), implicit);
   }
 
-  static CustomAttr *create(ASTContext &ctx, SourceLoc atLoc, TypeLoc type,
+  static CustomAttr *create(ASTContext &ctx, SourceLoc atLoc, TypeExpr *type,
                             bool hasInitializer,
                             PatternBindingInitializer *initContext,
                             SourceLoc lParenLoc,
@@ -1628,8 +1623,8 @@ class CustomAttr final : public DeclAttribute,
   unsigned getNumArguments() const { return numArgLabels; }
   bool hasArgumentLabelLocs() const { return hasArgLabelLocs; }
 
-  TypeLoc &getTypeLoc() { return type; }
-  const TypeLoc &getTypeLoc() const { return type; }
+  TypeRepr *getTypeRepr() const;
+  Type getType() const;
 
   Expr *getArg() const { return arg; }
   void setArg(Expr *newArg) { arg = newArg; }
@@ -1642,6 +1637,14 @@ class CustomAttr final : public DeclAttribute,
   static bool classof(const DeclAttribute *DA) {
     return DA->getKind() == DAK_Custom;
   }
+
+private:
+  friend class CustomAttrNominalRequest;
+  void resetTypeInformation(TypeExpr *repr);
+
+private:
+  friend class CustomAttrTypeRequest;
+  void setType(Type ty);
 };
 
 /// Relates a property to its projection value property, as described by a property wrapper. For

include/swift/AST/AutoDiff.h

@@ -521,8 +521,8 @@ IndexSubset *getLoweredParameterIndices(IndexSubset *astParameterIndices,
 ///
 /// Returns the "constrained" derivative/transpose generic signature given:
 /// - An original SIL function type.
-/// - Differentiability parameter indices.
-/// - A possibly "unconstrained" derivative generic signature.
+/// - Differentiability/linearity parameter indices.
+/// - A possibly "unconstrained" derivative/transpose generic signature.
 GenericSignature getConstrainedDerivativeGenericSignature(
     SILFunctionType *originalFnTy, IndexSubset *diffParamIndices,
     GenericSignature derivativeGenSig, LookupConformanceFn lookupConformance,

include/swift/AST/Decl.h

@@ -2715,6 +2715,7 @@ class ValueDecl : public Decl {
   /// Is this declaration marked with 'dynamic'?
   bool isDynamic() const;
 
+private:
   bool isObjCDynamic() const {
     return isObjC() && isDynamic();
   }
@@ -2723,6 +2724,37 @@ class ValueDecl : public Decl {
     return !isObjC() && isDynamic();
   }
 
+  bool isObjCDynamicInGenericClass() const;
+
+public:
+  /// Should we use Objective-C method dispatch for this decl.
+  bool shouldUseObjCDispatch() const {
+    return isObjCDynamic();
+  }
+
+  /// Should we use native dynamic function replacement dispatch for this decl.
+  bool shouldUseNativeDynamicDispatch() const {
+    return isNativeDynamic();
+  }
+
+  /// Should we use Objective-C category based function replacement for this
+  /// decl.
+  /// This is all `@objc dynamic` methods except for such methods in native
+  /// generic classes. We can't use a category for generic classes so we use
+  /// native replacement instead (this behavior is only enabled with
+  /// -enable-implicit-dynamic).
+  bool shouldUseObjCMethodReplacement() const;
+
+  /// Should we use native dynamic function replacement mechanism for this decl.
+  /// This is all native dynamic methods except for `@objc dynamic` methods in
+  /// generic classes (see above).
+  bool shouldUseNativeMethodReplacement() const;
+
+  /// Is this a native dynamic function replacement based replacement.
+  /// This is all @_dynamicReplacement(for:) of native functions and @objc
+  /// dynamic methods on generic classes (see above).
+  bool isNativeMethodReplacement() const;
+
   bool isEffectiveLinkageMoreVisibleThan(ValueDecl *other) const {
     return (std::min(getEffectiveAccess(), AccessLevel::Public) >
             std::min(other->getEffectiveAccess(), AccessLevel::Public));

include/swift/AST/DiagnosticsCommon.def

@@ -159,11 +159,11 @@ NOTE(circular_type_resolution_note,none,
 // MARK: Cross-import overlay loading diagnostics
 //------------------------------------------------------------------------------
 ERROR(cannot_load_swiftoverlay_file, none,
-      "cannot load cross-import overlay for %0 and %1: %2 (declared by '%3')",
-      (Identifier, Identifier, StringRef, StringRef))
+      "cannot load cross-import overlay for '%0' and '%1': %2 (declared by '%3')",
+      (StringRef, StringRef, StringRef, StringRef))
 ERROR(cannot_list_swiftcrossimport_dir, none,
-      "cannot list cross-import overlays for %0: %1 (declared in '%2')",
-      (Identifier, StringRef, StringRef))
+      "cannot list cross-import overlays for '%0': %1 (declared in '%2')",
+      (StringRef, StringRef, StringRef))
 WARNING(cross_imported_by_both_modules, none,
         "modules %0 and %1 both declare module %2 as a cross-import overlay, "
         "which may cause paradoxical behavior when looking up names in them; "

include/swift/AST/DiagnosticsSema.def

@@ -94,6 +94,9 @@ ERROR(could_not_find_enum_case,none,
 
 NOTE(did_you_mean_raw_type,none,
      "did you mean to specify a raw type on the enum declaration?", ())
+
+NOTE(did_you_mean_generic_param_as_conformance,none,
+     "did you mean to declare %0 as a protocol conformance for %1?", (DeclName, Type))
 
 NOTE(any_as_anyobject_fixit, none,
      "cast 'Any' to 'AnyObject' or use 'as!' to force downcast to a more specific type to access members", ())
@@ -5075,8 +5078,8 @@ ERROR(function_builder_infer_ambig, none,
 NOTE(function_builder_infer_add_return, none,
      "add an explicit 'return' statement to not use a function builder", ())
 NOTE(function_builder_infer_pick_specific, none,
-     "apply function builder %0 (inferred from protocol %1)",
-     (Type, DeclName))
+     "apply function builder %0 (inferred from %select{protocol|dynamic replacement of}1 %2)",
+     (Type, unsigned, DeclName))
 
 //------------------------------------------------------------------------------
 // MARK: Tuple Shuffle Diagnostics