AST: Rename AvailabilityContext::getDefault() to forInliningTarget().

Mirrors the factory methods on `AvailabilityRange`.

Author: tshortli

include/swift/AST/AvailabilityContext.h

@@ -52,10 +52,10 @@ class AvailabilityContext {
       ASTContext &ctx);
 
 public:
-  /// Retrieves the default `AvailabilityContext`, which is maximally available.
-  /// The platform availability range will be set to the deployment target (or
-  /// minimum inlining target when applicable).
-  static AvailabilityContext getDefault(ASTContext &ctx);
+  /// Retrieves the maximally available `AvailabilityContext` for the
+  /// compilation. The platform availability range will be set to the minimum
+  /// inlining target (which may just be the deployment target).
+  static AvailabilityContext forInliningTarget(ASTContext &ctx);
 
   /// Returns the range of platform versions which may execute code in the
   /// availability context, starting at its introduction version.

lib/AST/AvailabilityContext.cpp

@@ -124,7 +124,7 @@ void AvailabilityContext::Storage::Profile(llvm::FoldingSetNodeID &id) const {
   Platform.Profile(id);
 }
 
-AvailabilityContext AvailabilityContext::getDefault(ASTContext &ctx) {
+AvailabilityContext AvailabilityContext::forInliningTarget(ASTContext &ctx) {
   PlatformInfo platformInfo{AvailabilityRange::forInliningTarget(ctx),
                             PlatformKind::none,
                             /*IsUnavailable*/ false,

lib/Sema/DerivedConformanceRawRepresentable.cpp

@@ -16,17 +16,18 @@
 //===----------------------------------------------------------------------===//
 
 #include "CodeSynthesis.h"
+#include "DerivedConformances.h"
+#include "TypeCheckAvailability.h"
+#include "TypeCheckDecl.h"
 #include "TypeChecker.h"
 #include "swift/AST/Decl.h"
-#include "swift/AST/Stmt.h"
 #include "swift/AST/Expr.h"
-#include "swift/AST/Pattern.h"
 #include "swift/AST/ParameterList.h"
+#include "swift/AST/Pattern.h"
+#include "swift/AST/Stmt.h"
 #include "swift/AST/Types.h"
 #include "swift/Basic/Assertions.h"
 #include "llvm/ADT/APInt.h"
-#include "DerivedConformances.h"
-#include "TypeCheckDecl.h"
 
 using namespace swift;
 

lib/Sema/TypeCheckAvailability.cpp

@@ -1428,7 +1428,7 @@ void TypeChecker::buildAvailabilityScopes(SourceFile &SF) {
   // The root availability scope reflects the fact that all parts of
   // the source file are guaranteed to be executing on at least the minimum
   // platform version for inlining.
-  auto AvailabilityContext = AvailabilityContext::getDefault(Context);
+  auto AvailabilityContext = AvailabilityContext::forInliningTarget(Context);
   AvailabilityScope *RootScope =
       AvailabilityScope::createForSourceFile(&SF, AvailabilityContext);
   SF.setAvailabilityScope(RootScope);
@@ -1493,7 +1493,7 @@ TypeChecker::availabilityAtLocation(SourceLoc loc, const DeclContext *DC,
   // this will be a real problem.
 
   // We can assume we are running on at least the minimum inlining target.
-  auto baseAvailability = AvailabilityContext::getDefault(Context);
+  auto baseAvailability = AvailabilityContext::forInliningTarget(Context);
   auto isInvalidLoc = [SF](SourceLoc loc) {
     return SF ? loc.isInvalid() : true;
   };