TextualInterface: print __conuming before accessors

rdar://80535144

Author: nkcsgexi

lib/AST/ASTPrinter.cpp

@@ -3428,7 +3428,9 @@ void PrintAST::visitAccessorDecl(AccessorDecl *decl) {
   printAttributes(decl);
   // Explicitly print 'mutating' and 'nonmutating' if needed.
   printMutabilityModifiersIfNeeded(decl);
-
+  if (decl->isConsuming()) {
+    Printer.printKeyword("__consuming", Options, " ");
+  }
   switch (auto kind = decl->getAccessorKind()) {
   case AccessorKind::Get:
   case AccessorKind::Address:

test/ModuleInterface/consuming.swift

@@ -0,0 +1,27 @@
+// RUN: %empty-directory(%t)
+// RUN: %empty-directory(%t/missing)
+// RUN: %empty-directory(%t/inputs)
+// RUN: %target-swift-frontend -emit-module-path %t/missing/Foo.swiftmodule -enable-library-evolution -emit-module-interface-path %t/inputs/Foo.swiftinterface -enable-objc-interop -disable-objc-attr-requires-foundation-module -module-name Foo %s
+// RUN: %FileCheck --input-file %t/inputs/Foo.swiftinterface %s
+
+// RUN: touch %t/Bar.swift
+// RUN: echo "import Foo" > %t/Bar.swift
+// RUN: echo "let f = Field()" >> %t/Bar.swift
+
+// RUN: %target-swift-frontend -emit-module-path %t/Bar.swiftmodule -enable-library-evolution -enable-objc-interop -disable-objc-attr-requires-foundation-module -module-name Bar %t/Bar.swift -I %t/inputs
+
+
+import Swift
+
+public struct Field {
+  public init() {}
+  public var area: Int {
+    __consuming get { return 1 }
+    _modify {
+      var a = 1
+      yield &a
+    }
+  }
+}
+
+// CHECK: __consuming get