AST: Use Requirement::getProtocolDecl()

Author: slavapestov

lib/AST/ASTPrinter.cpp

@@ -1683,14 +1683,11 @@ void PrintAST::printGenericSignature(GenericSignature genericSig,
 static void eraseInvertibleProtocolConformances(
     SmallVectorImpl<Requirement> &requirements) {
   llvm::erase_if(requirements, [&](Requirement req) {
-      if (req.getKind() == RequirementKind::Conformance) {
-        if (auto protoType = req.getSecondType()->getAs<ProtocolType>()) {
-          auto proto = protoType->getDecl();
-          return proto->getInvertibleProtocolKind().has_value();
-        }
-      }
+      if (req.getKind() != RequirementKind::Conformance)
+        return false;
 
-      return false;
+      return req.getProtocolDecl()
+          ->getInvertibleProtocolKind().has_value();
     });
 }
 

lib/AST/Type.cpp

@@ -954,7 +954,7 @@ Type TypeBase::stripConcurrency(bool recurse, bool dropGlobalActor) {
         // If it's a Sendable requirement, skip it.
         const auto &req = requirements[reqIdx];
         if (req.getKind() == RequirementKind::Conformance &&
-            req.getSecondType()->castTo<ProtocolType>()->getDecl()
+            req.getProtocolDecl()
               ->isSpecificProtocol(KnownProtocolKind::Sendable))
           continue;