PrintAsObjC: Add visibilty test for @cdecl with app vs library behavior

Author: xymus

test/PrintAsObjC/cdecl-official-visibility.swift

@@ -0,0 +1,64 @@
+// RUN: %empty-directory(%t)
+// RUN: split-file %s %t --leading-lines
+
+/// Generate cdecl.h for an app
+// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) \
+// RUN:   %t/Lib.swift -emit-module -verify -o %t -emit-module-doc \
+// RUN:   -emit-clang-header-path %t/cdecl.h -package-name pkg \
+// RUN:   -enable-experimental-feature CDecl
+// RUN: %FileCheck %s --input-file %t/cdecl.h --check-prefixes PUBLIC-AND-INTERNAL,INTERNAL-ONLY
+// RUN: %check-in-clang-c %t/cdecl.h
+
+/// Generate cdecl.h for a library
+// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -parse-as-library \
+// RUN:   %t/Lib.swift -emit-module -verify -o %t -emit-module-doc \
+// RUN:   -emit-clang-header-path %t/cdecl.h -package-name pkg \
+// RUN:   -enable-experimental-feature CDecl
+// RUN: %FileCheck %s --input-file %t/cdecl.h --check-prefixes PUBLIC-AND-INTERNAL
+// RUN: %FileCheck %s --input-file %t/cdecl.h --implicit-check-not INTERNAL-ONLY
+// RUN: %check-in-clang-c %t/cdecl.h
+
+// REQUIRES: swift_feature_CDecl
+
+//--- Lib.swift
+
+@cdecl private enum PrivateEnum: CInt { case A, B }
+// PUBLIC-AND-INTERNAL-NOT: PrivateEnum
+
+@cdecl internal enum InternalEnum: CInt { case A, B }
+// INTERNAL-ONLY: typedef SWIFT_ENUM(int, InternalEnum, closed) {
+// INTERNAL-ONLY:   InternalEnumA = 0,
+// INTERNAL-ONLY:   InternalEnumB = 1,
+// INTERNAL-ONLY: };
+
+@cdecl package enum PackageEnum: CInt { case A, B }
+// INTERNAL-ONLY: typedef SWIFT_ENUM(int, PackageEnum, closed) {
+// INTERNAL-ONLY:   PackageEnumA = 0,
+// INTERNAL-ONLY:   PackageEnumB = 1,
+// INTERNAL-ONLY: };
+
+@cdecl public enum PublicEnum: CInt { case A, B }
+// PUBLIC-AND-INTERNAL: typedef SWIFT_ENUM(int, PublicEnum, closed) {
+// PUBLIC-AND-INTERNAL:   PublicEnumA = 0,
+// PUBLIC-AND-INTERNAL:   PublicEnumB = 1,
+// PUBLIC-AND-INTERNAL: };
+
+/// Private documentation
+@cdecl private func a_private() {}
+// PUBLIC-AND-INTERNAL-NOT: // Private documentation
+// PUBLIC-AND-INTERNAL-NOT: a_private
+
+/// Internal documentation
+@cdecl internal func b_internal() {}
+// INTERNAL-ONLY: // Internal documentation
+// INTERNAL-ONLY: b_internal
+
+/// Package documentation
+@cdecl package func c_package() {}
+// INTERNAL-ONLY: // Package documentation
+// INTERNAL-ONLY: c_package
+
+/// Public documentation
+@cdecl public func d_public() {}
+// PUBLIC-AND-INTERNAL: // Public documentation
+// PUBLIC-AND-INTERNAL: d_public