AST: Move TypeBase::isParameterPack() to ParameterPack.cpp

Author: slavapestov

include/swift/AST/Types.h

@@ -7093,16 +7093,6 @@ inline bool TypeBase::isTypeParameter() {
   return t->is<GenericTypeParamType>();
 }
 
-inline bool TypeBase::isParameterPack() {
-  Type t(this);
-
-  while (auto *memberTy = t->getAs<DependentMemberType>())
-    t = memberTy->getBase();
-
-  return t->is<GenericTypeParamType>() &&
-         t->castTo<GenericTypeParamType>()->isParameterPack();
-}
-
 // TODO: This will become redundant once InOutType is removed.
 inline bool TypeBase::isMaterializable() {
   return !(hasLValueType() || is<InOutType>());

lib/AST/ParameterPack.cpp

@@ -90,6 +90,16 @@ bool GenericTypeParamType::isParameterPack() const {
          GenericTypeParamType::TYPE_SEQUENCE_BIT;
 }
 
+bool TypeBase::isParameterPack() {
+  Type t(this);
+
+  while (auto *memberTy = t->getAs<DependentMemberType>())
+    t = memberTy->getBase();
+
+  return t->is<GenericTypeParamType>() &&
+         t->castTo<GenericTypeParamType>()->isParameterPack();
+}
+
 PackType *TypeBase::getPackSubstitutionAsPackType() {
   if (auto pack = getAs<PackType>()) {
     return pack;