AST: Rename createForAlternative() to createForAsyncAlternative().

Author: tshortli

include/swift/AST/Attr.h

@@ -851,8 +851,8 @@ class AvailableAttr : public DeclAttribute {
 
   /// Create an AvailableAttr that indicates the given \p AsyncFunc should be
   /// preferentially used in async contexts
-  static AvailableAttr *createForAlternative(ASTContext &C,
-                                             AbstractFunctionDecl *AsyncFunc);
+  static AvailableAttr *
+  createForAsyncAlternative(ASTContext &C, AbstractFunctionDecl *AsyncFunc);
 
   AvailableAttr *clone(ASTContext &C, bool implicit) const;
   AvailableAttr *clone(ASTContext &C) const {

lib/AST/Attr.cpp

@@ -2267,8 +2267,9 @@ AvailableAttr::createPlatformAgnostic(ASTContext &C,
     Kind, /* isImplicit */ false, /*SPI*/false);
 }
 
-AvailableAttr *AvailableAttr::createForAlternative(
-    ASTContext &C, AbstractFunctionDecl *AsyncFunc) {
+AvailableAttr *
+AvailableAttr::createForAsyncAlternative(ASTContext &C,
+                                         AbstractFunctionDecl *AsyncFunc) {
   llvm::VersionTuple NoVersion;
   return new (C) AvailableAttr(
     SourceLoc(), SourceRange(), PlatformKind::none, "", "", AsyncFunc,

lib/ClangImporter/ImportDecl.cpp

@@ -7887,7 +7887,7 @@ void addCompletionHandlerAttribute(Decl *asyncImport,
     if (member != asyncImport && isa<AbstractFunctionDecl>(member) &&
         !member->getAttrs().hasAttribute<AvailableAttr>()) {
       member->getAttrs().add(
-          AvailableAttr::createForAlternative(SwiftContext, asyncFunc));
+          AvailableAttr::createForAsyncAlternative(SwiftContext, asyncFunc));
     }
   }
 }