[gardening] Move ActorIsolation method definitions from Decl.cpp -> ActorIsolation.cpp.

lib/AST/ActorIsolation.cpp

@@ -12,10 +12,186 @@
 
 #include "swift/AST/ActorIsolation.h"
 #include "swift/AST/ASTContext.h"
+#include "swift/AST/ConformanceLookup.h"
+#include "swift/AST/Decl.h"
+#include "swift/AST/Expr.h"
 
 using namespace swift;
 
 ActorIsolation ActorIsolation::forMainActor(ASTContext &ctx) {
   return ActorIsolation::forGlobalActor(
       ctx.getMainActorType()->mapTypeOutOfContext());
 }
+
+ActorIsolation::ActorIsolation(Kind kind, NominalTypeDecl *actor,
+                               unsigned parameterIndex)
+    : actorInstance(actor), kind(kind), isolatedByPreconcurrency(false),
+      silParsed(false), parameterIndex(parameterIndex) {}
+
+ActorIsolation::ActorIsolation(Kind kind, VarDecl *actor,
+                               unsigned parameterIndex)
+    : actorInstance(actor), kind(kind), isolatedByPreconcurrency(false),
+      silParsed(false), parameterIndex(parameterIndex) {}
+
+ActorIsolation::ActorIsolation(Kind kind, Expr *actor, unsigned parameterIndex)
+    : actorInstance(actor), kind(kind), isolatedByPreconcurrency(false),
+      silParsed(false), parameterIndex(parameterIndex) {}
+
+ActorIsolation::ActorIsolation(Kind kind, Type globalActor)
+    : globalActor(globalActor), kind(kind), isolatedByPreconcurrency(false),
+      silParsed(false), parameterIndex(0) {}
+
+ActorIsolation
+ActorIsolation::forActorInstanceParameter(Expr *actor,
+                                          unsigned parameterIndex) {
+  auto &ctx = actor->getType()->getASTContext();
+
+  // An isolated value of `nil` is statically nonisolated.
+  // FIXME: Also allow 'Optional.none'
+  if (isa<NilLiteralExpr>(actor))
+    return ActorIsolation::forNonisolated(/*unsafe*/ false);
+
+  // An isolated value of `<global actor type>.shared` is statically
+  // global actor isolated.
+  if (auto *memberRef = dyn_cast<MemberRefExpr>(actor)) {
+    // Check that the member declaration witnesses the `shared`
+    // requirement of the `GlobalActor` protocol.
+    auto declRef = memberRef->getDecl();
+    auto baseType = memberRef->getBase()->getType()->getMetatypeInstanceType();
+    if (auto globalActor = ctx.getProtocol(KnownProtocolKind::GlobalActor)) {
+      auto conformance = checkConformance(baseType, globalActor);
+      if (conformance &&
+          conformance.getWitnessByName(baseType, ctx.Id_shared) == declRef) {
+        return ActorIsolation::forGlobalActor(baseType);
+      }
+    }
+  }
+
+  return ActorIsolation(ActorInstance, actor, parameterIndex + 1);
+}
+
+ActorIsolation ActorIsolation::forActorInstanceSelf(ValueDecl *decl) {
+  if (auto *fn = dyn_cast<AbstractFunctionDecl>(decl))
+    return ActorIsolation(ActorInstance, fn->getImplicitSelfDecl(), 0);
+
+  if (auto *storage = dyn_cast<AbstractStorageDecl>(decl)) {
+    if (auto *fn = storage->getAccessor(AccessorKind::Get)) {
+      return ActorIsolation(ActorInstance, fn->getImplicitSelfDecl(), 0);
+    }
+  }
+
+  auto *dc = decl->getDeclContext();
+  return ActorIsolation(ActorInstance, dc->getSelfNominalTypeDecl(), 0);
+}
+
+ActorIsolation ActorIsolation::forActorInstanceSelf(NominalTypeDecl *selfDecl) {
+  return ActorIsolation(ActorInstance, selfDecl, 0);
+}
+
+NominalTypeDecl *ActorIsolation::getActor() const {
+  assert(getKind() == ActorInstance || getKind() == GlobalActor);
+
+  if (silParsed)
+    return nullptr;
+
+  if (getKind() == GlobalActor) {
+    return getGlobalActor()->getAnyNominal();
+  }
+
+  Type actorType;
+
+  if (auto *instance = actorInstance.dyn_cast<VarDecl *>()) {
+    actorType = instance->getTypeInContext();
+  } else if (auto *expr = actorInstance.dyn_cast<Expr *>()) {
+    actorType = expr->getType();
+  }
+
+  if (actorType) {
+    if (auto wrapped = actorType->getOptionalObjectType()) {
+      actorType = wrapped;
+    }
+    return actorType->getReferenceStorageReferent()->getAnyActor();
+  }
+
+  return actorInstance.get<NominalTypeDecl *>();
+}
+
+VarDecl *ActorIsolation::getActorInstance() const {
+  assert(getKind() == ActorInstance);
+
+  if (silParsed)
+    return nullptr;
+
+  return actorInstance.dyn_cast<VarDecl *>();
+}
+
+Expr *ActorIsolation::getActorInstanceExpr() const {
+  assert(getKind() == ActorInstance);
+
+  if (silParsed)
+    return nullptr;
+
+  return actorInstance.dyn_cast<Expr *>();
+}
+
+bool ActorIsolation::isMainActor() const {
+  if (silParsed)
+    return false;
+
+  if (isGlobalActor()) {
+    if (auto *nominal = getGlobalActor()->getAnyNominal())
+      return nominal->isMainActor();
+  }
+
+  return false;
+}
+
+bool ActorIsolation::isDistributedActor() const {
+  if (silParsed)
+    return false;
+
+  if (getKind() != ActorInstance)
+    return false;
+
+  return getActor()->isDistributedActor();
+}
+
+bool ActorIsolation::isEqual(const ActorIsolation &lhs,
+                             const ActorIsolation &rhs) {
+  if (lhs.getKind() != rhs.getKind())
+    return false;
+
+  switch (lhs.getKind()) {
+  case Nonisolated:
+  case NonisolatedUnsafe:
+  case Unspecified:
+    return true;
+
+  case Erased:
+    // Different functions with erased isolation have the same *kind* of
+    // isolation, but we must generally assume that they're not isolated
+    // the *same way*, which is what this function is apparently supposed
+    // to answer.
+    return false;
+
+  case ActorInstance: {
+    auto *lhsActor = lhs.getActorInstance();
+    auto *rhsActor = rhs.getActorInstance();
+    if (lhsActor && rhsActor) {
+      // FIXME: This won't work for arbitrary isolated parameter captures.
+      if ((lhsActor->isSelfParameter() && rhsActor->isSelfParamCapture()) ||
+          (lhsActor->isSelfParamCapture() && rhsActor->isSelfParameter())) {
+        return true;
+      }
+    }
+
+    // The parameter index doesn't matter; only the actor instance
+    // values must be equal.
+    return (lhs.getActor() == rhs.getActor() &&
+            lhs.actorInstance == rhs.actorInstance);
+  }
+
+  case GlobalActor:
+    return areTypesEqual(lhs.globalActor, rhs.globalActor);
+  }
+}

lib/AST/Decl.cpp

@@ -11476,183 +11476,6 @@ void swift::simple_display(llvm::raw_ostream &out, AnyFunctionRef fn) {
     out << "closure";
 }
 
-ActorIsolation::ActorIsolation(Kind kind, NominalTypeDecl *actor,
-                               unsigned parameterIndex)
-    : actorInstance(actor), kind(kind), isolatedByPreconcurrency(false),
-      silParsed(false), parameterIndex(parameterIndex) {}
-
-ActorIsolation::ActorIsolation(Kind kind, VarDecl *actor,
-                               unsigned parameterIndex)
-    : actorInstance(actor), kind(kind), isolatedByPreconcurrency(false),
-      silParsed(false), parameterIndex(parameterIndex) {}
-
-ActorIsolation::ActorIsolation(Kind kind, Expr *actor,
-                               unsigned parameterIndex)
-    : actorInstance(actor), kind(kind), isolatedByPreconcurrency(false),
-      silParsed(false), parameterIndex(parameterIndex) {}
-
-ActorIsolation::ActorIsolation(Kind kind, Type globalActor)
-    : globalActor(globalActor), kind(kind), isolatedByPreconcurrency(false),
-      silParsed(false), parameterIndex(0) {}
-
-ActorIsolation
-ActorIsolation::forActorInstanceParameter(Expr *actor,
-                                          unsigned parameterIndex) {
-  auto &ctx = actor->getType()->getASTContext();
-
-  // An isolated value of `nil` is statically nonisolated.
-  // FIXME: Also allow 'Optional.none'
-  if (dyn_cast<NilLiteralExpr>(actor))
-    return ActorIsolation::forNonisolated(/*unsafe*/false);
-
-  // An isolated value of `<global actor type>.shared` is statically
-  // global actor isolated.
-  if (auto *memberRef = dyn_cast<MemberRefExpr>(actor)) {
-    // Check that the member declaration witnesses the `shared`
-    // requirement of the `GlobalActor` protocol.
-    auto declRef = memberRef->getDecl();
-    auto baseType =
-        memberRef->getBase()->getType()->getMetatypeInstanceType();
-    if (auto globalActor = ctx.getProtocol(KnownProtocolKind::GlobalActor)) {
-      auto conformance = checkConformance(baseType, globalActor);
-      if (conformance &&
-          conformance.getWitnessByName(baseType, ctx.Id_shared) == declRef) {
-        return ActorIsolation::forGlobalActor(baseType);
-      }
-    }
-  }
-
-  return ActorIsolation(ActorInstance, actor, parameterIndex + 1);
-}
-
-ActorIsolation
-ActorIsolation::forActorInstanceSelf(ValueDecl *decl) {
-  if (auto *fn = dyn_cast<AbstractFunctionDecl>(decl))
-    return ActorIsolation(ActorInstance, fn->getImplicitSelfDecl(), 0);
-
-  if (auto *storage = dyn_cast<AbstractStorageDecl>(decl)) {
-    if (auto *fn = storage->getAccessor(AccessorKind::Get)) {
-      return ActorIsolation(ActorInstance, fn->getImplicitSelfDecl(), 0);
-    }
-  }
-
-  auto *dc = decl->getDeclContext();
-  return ActorIsolation(ActorInstance, dc->getSelfNominalTypeDecl(), 0);
-}
-
-ActorIsolation ActorIsolation::forActorInstanceSelf(NominalTypeDecl *selfDecl) {
-  return ActorIsolation(ActorInstance, selfDecl, 0);
-}
-
-NominalTypeDecl *ActorIsolation::getActor() const {
-  assert(getKind() == ActorInstance || getKind() == GlobalActor);
-
-  if (silParsed)
-    return nullptr;
-
-  if (getKind() == GlobalActor) {
-    return getGlobalActor()->getAnyNominal();
-  }
-
-  Type actorType;
-
-  if (auto *instance = actorInstance.dyn_cast<VarDecl *>()) {
-    actorType = instance->getTypeInContext();
-  } else if (auto *expr = actorInstance.dyn_cast<Expr *>()) {
-    actorType = expr->getType();
-  }
-
-  if (actorType) {
-    if (auto wrapped = actorType->getOptionalObjectType()) {
-      actorType = wrapped;
-    }
-    return actorType
-        ->getReferenceStorageReferent()->getAnyActor();
-  }
-
-  return actorInstance.get<NominalTypeDecl *>();
-}
-
-VarDecl *ActorIsolation::getActorInstance() const {
-  assert(getKind() == ActorInstance);
-
-  if (silParsed)
-    return nullptr;
-
-  return actorInstance.dyn_cast<VarDecl *>();
-}
-
-Expr *ActorIsolation::getActorInstanceExpr() const {
-  assert(getKind() == ActorInstance);
-
-  if (silParsed)
-    return nullptr;
-
-  return actorInstance.dyn_cast<Expr *>();
-}
-
-bool ActorIsolation::isMainActor() const {
-  if (silParsed)
-    return false;
-
-  if (isGlobalActor()) {
-    if (auto *nominal = getGlobalActor()->getAnyNominal())
-      return nominal->isMainActor();
-  }
-
-  return false;
-}
-
-bool ActorIsolation::isDistributedActor() const {
-  if (silParsed)
-    return false;
-
-  if (getKind() != ActorInstance)
-    return false;
-
-  return getActor()->isDistributedActor();
-}
-
-bool ActorIsolation::isEqual(const ActorIsolation &lhs,
-                             const ActorIsolation &rhs) {
-  if (lhs.getKind() != rhs.getKind())
-    return false;
-
-  switch (lhs.getKind()) {
-  case Nonisolated:
-  case NonisolatedUnsafe:
-  case Unspecified:
-    return true;
-
-  case Erased:
-    // Different functions with erased isolation have the same *kind* of
-    // isolation, but we must generally assume that they're not isolated
-    // the *same way*, which is what this function is apparently supposed
-    // to answer.
-    return false;
-
-  case ActorInstance: {
-    auto *lhsActor = lhs.getActorInstance();
-    auto *rhsActor = rhs.getActorInstance();
-    if (lhsActor && rhsActor) {
-      // FIXME: This won't work for arbitrary isolated parameter captures.
-      if ((lhsActor->isSelfParameter() && rhsActor->isSelfParamCapture()) ||
-          (lhsActor->isSelfParamCapture() && rhsActor->isSelfParameter())) {
-        return true;
-      }
-    }
-
-    // The parameter index doesn't matter; only the actor instance
-    // values must be equal.
-    return (lhs.getActor() == rhs.getActor() &&
-            lhs.actorInstance == rhs.actorInstance);
-  }
-
-  case GlobalActor:
-    return areTypesEqual(lhs.globalActor, rhs.globalActor);
-  }
-}
-
 BuiltinTupleDecl::BuiltinTupleDecl(Identifier Name, DeclContext *Parent)
     : NominalTypeDecl(DeclKind::BuiltinTuple, Parent, Name, SourceLoc(),
                       ArrayRef<InheritedEntry>(), nullptr) {}